The roller grinding mill according to the invention for comminuting brittle grinding stock substantially comprises a. at least one grinding roller which co-operates with a counter-face in such a manner that the grinding stock is comminuted between the grinding roller and the counter-face and b. a pressing system for applying a force to the grinding stock via the grinding roller, the pressing system having the following components: b1. at least one hydropneumatic store and b2. at least one dual-articulation actuating cylinder which is connected to the hydropneumatic store and which has pistons and a housing, the dual-articulation actuating cylinder having two pistons and a housing which acts as a coupling rod.
B02C 4/34 - Adjusting, applying pressure to, or controlling the distance between, milling members in mills wherein a roller co-operates with a stationary member
B02C 4/10 - Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
The invention relates to a roller mill substantially comprising at least one milling roller (1) and one milling plate (2), wherein the milling plate has a milling plate interior (2b) that is open downward, at least one milling roller drive system (3) for driving the milling roller and a milling plate drive system for driving the milling plate. The milling plate drive system furthermore has a gearless direct drive (4) that is arranged in the milling plate interior.
The invention relates to a method and a plant for producing cement by blending hydraulic clinker and a latently hydraulic mixture of minerals, the hydraulic clinker being burned separately from the latently hydraulic mixture of minerals. The latently hydraulic mixture of minerals is produced by combining desired raw materials, then burning and/or melting said raw materials, and cooling the same. The waste gases produced during the production of the latently hydraulic mixture of minerals are fed to a CO2 processing stage in which the waste gases are compressed.
F27B 7/20 - Rotary-drum furnaces, i.e. horizontal or slightly inclined - Details, accessories, or equipment peculiar to rotary-drum furnaces
F27B 15/02 - Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion - Details, accessories, or equipment peculiar to furnaces of these types
C04B 7/36 - Manufacture of hydraulic cements in general
F23J 15/02 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
F23J 15/04 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
In a method according to the invention for producing cement clinker, raw ground cement is pre-heated in a pre-heater, the pre-heated raw ground cement is pre-calcined in a calciner, and the pre-calcined raw ground cement is fired in a furnace, wherein fuel and combustion air used in the calciner comprises an oxygen content of at least 75 mol% and the raw ground cement is pre-calcined in a fluidized bed in the calciner. The exhaust gases arising in the furnace are fed to the pre-heater after passing around the calciner and the exhaust gases from the calciner are fed to a CO2 scrubbing device.
The invention relates to a method for monitoring the load state of a grinding system comprising rotating grinding elements, wherein the dynamic forces exerted by the ground material onto the grinding elements are detected in a first frequency range containing the base vibration of the grinding elements and in a second frequency range in which the first harmonic of the base vibration occurs, whereupon actions for reducing the load state are introduced if the first harmonic exceeds a pre-determined threshold relative to the magnitude of the base vibration. Such a method enables a very reliable and precise monitoring of the load state of the grinding system.
In the method according to the invention for firing material pieces in a shaft furnace, a material bed forms in the shaft furnace, said bed having a material bed surface, and fuel is fed in a combustion zone by way of at least one burner lance, wherein the exhaust gas stream that results is loaded with pollutants. The shaft furnace is operated such that a material bed surface temperature of 900°C-1100°C is set up and a means for NOx reduction is fed in above the material bed surface.
The invention relates to a roller mill comprising a milling plate (1) which is rotationally mounted about a milling axis (1), at least one milling roller (2) which can be rotated about a milling roller axis (3) and which is in rolling engagement with the milling plate (1), at least one pivoting lever (4) for maintaining the milling roller (2) which has a tilt axis (5) that is disposed parallel or offset with respect to the milling roller axis (3). Said roller mill also comprises a stationary motor (8) which is connected to a milling roller (2) by means of a drive train for transmitting power. Said drive train comprises a stationary drive train and a drive train entrained by the pivoting lever (4). Said stationary drive train comprises a drive element which is in contact with the entrained drive train and is arranged in a coaxial manner in relation to the tilt axis (5) of the pivoting lever (4). According to another embodiment of the invention, both drive trains are connected together by means of two bevel gears which are arranged in such a manner that the axes thereof intersect the tilt axis
The invention relates to a roller mill comprising, essentially, a rotatable milling plate (1), at least one milling roller (3) which is mounted in a rotating manner on a pivoting lever (2) and which is in rolling engagement with the milling plate (1), said pivoting lever (2) being pivotably mounted about a pivoting lever axis (6), and at least one drive train which is connected to the milling roller (3) and which comprises a stationary motor (4) and a stationary transmission (14). Said drive train also comprises a transmission (15) which pivots with the pivoting lever (2) and/or the milling roller (3).
The invention relates to a roller mill comprising, essentially, a rotatable milling plate (1), at least one milling roller (3) which is mounted in a rotating manner on a pivoting lever (2) and which is in rolling engagement with the milling plate, said pivoting lever (2) being pivotably mounted about a pivotable lever axis (6), and a drive train which is associated with the milling roller (3) for driving the milling roller by means of a stationary motor (4) and a coupling (12) that is arranged in the pivotable lever axis (6) and which compensates the pivoting movements of the pivoting lever (2).
The invention relates to a roller mill comprising, essentially, a milling housing (7) which defines a milling chamber, a milling plate that can rotate in the milling chamber, and at least one rotatable milling roller (3) which is in rolling engagement with the milling plate (1). The invention also relates to a drive which is associated with the milling roller (3) and which comprises at least one transmission (14,15). At least one part of the transmission is arranged in the region of the milling roller (3) and is designed as a planetary gear (15).
The invention relates to a method and an installation for producing granulated blast-furnace slag, which is obtained by quenching and comminuting slag that occurs in a melting process, wherein the slag-forming raw material is fed to the melting process and the slag is drawn off as the main product of the melting process, while over 50% of the melt is preserved.
In the method according to the invention for operating a cement system, the raw meal is preheated in a preheat zone, the preheated material is pre-calcined in a calcining zone and the pre-calcined material is finally sintered in a sintering zone. The cement system is operated such that the pre-calcined material fed to the sintering zone has an SO3 concentration of at least 5.5 weight percent and a CaSO4 fraction of at least 75 weight %, preferably 90%, based on the entire salt content of the pre-calcined material.
The roller mill according to the invention comprises a grinding table (10), at least one grinding roller (11, 12) and at least two motors (drives) (13, 14) with stator and rotor windings for driving the roller mill and is equipped with at least one control device (20, 21) for regulating the motor torque of at least one drive. The control device is connected to the rotor winding (13a, 14a) of at least one drive for the purposes of influencing the rotor current. Further protected is a method for size reduction of ground material using such a roller mill.
The device according to the invention for separating a solid material and a gas is made substantially of a helical and/or spiral pipeline in which a gas-solid suspension is separated into a solid stream and a gas stream by centrifugal forces, a solid material pipeline connected to the end of the helical and/or spiral pipeline for removing the solid material stream, and a gas line connected to the end of the helical and/or spiral pipeline for removing the gas stream. Mechanical fixtures are further provided in the helical and/or spiral pipeline for spatially bounding the two flows, said fixtures gradually increases in the flow direction of the gas-solid suspension. Alternatively, the helical and/or spiral pipeline can also comprise a cross-sectional shape forming, for at least one of the two flows, a groove or channel-like boundary to the other flow, wherein the groove or channel-like boundary gradually increases in the flow direction of the gas-solid suspension.
The device according to the invention for separating a solid material and a gas is made substantially of a helical and/or spiral pipeline in which a gas-solid suspension is separated into a solid stream and a gas stream by centrifugal forces, and a deposition area connected to the end of the helical and/or spiral pipeline, a solid material pipeline for removing the solid stream and a gas line for removing the gas stream being connected to said pipeline. The deposition chamber has a curved segment connecting to the helical and/or spiral pipeline, wherein said segment takes on and continues the curved path of the helical and/or spiral pipeline and the cross section of said segment increases in the flow direction.
B04C 1/00 - Apparatus in which the main direction of flow follows a flat spiral
C04B 7/43 - Heat treatment, e.g. precalcining, burning, melting; Cooling
B01D 45/12 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
16.
DEVICE FOR SEPARATING A SOLID MATERIAL AND A GAS AND PLANT FOR PRODUCING CEMENT
The device according to the invention for separating a solid material and a gas is made substantially of a. a riser pipe for feeding a gas-solid suspension, b. a downward sloping helical and/or spiral pipeline wherein the gas-solid suspension is separated into a solid flow and a gas flow by centrifugal forces, c. a deflecting head connecting the riser pipe to the helical and/or spiral pipeline, d. a solid material pipeline connected to the end of helical and/or spiral pipeline for removing the solid flow, wherein the deflecting head comprises at least one first segment and a second segment disposed downstream in the flow direction of the gas-solid suspension and permeated by the gas-solid suspension, wherein the two segments are curved and the curves thereof are opposite each other in the flow direction of the gas-solid suspension.
B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
B01D 45/12 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
C04B 7/43 - Heat treatment, e.g. precalcining, burning, melting; Cooling
17.
DEVICE FOR PERFORMING CHEMICAL AND/OR PHYSICAL REACTIONS BETWEEN A SOLID MATERIAL AND A GAS
The device according to the invention for performing chemical and/or physical reactions between a solid material and a gas, particularly for preheating, cooling, and/or calcining fine-grained materials is made substantially of a helical and/or spiral pipeline in which a gas-solid suspension is separated into a solid stream and a gas stream by centrifugal forces, and at least one deposition area connected to the end of the helical or spiral pipeline and connected to a gas line for removing the gas stream or formed by a part of the gas line, a solid material pipeline for removing the solid stream being connected to said deposition area. The helical and/or spiral pipeline opens tangentially into the deposition chamber at an angle of at least 30° to the horizontal, and the cross section of the deposition chamber in the area of the opening is 0.5 to 1.5 times the size of the cross section of the helical and/or spiral pipeline.
The device according to the invention for performing chemical and/or physical reactions between a solid material and a gas, particularly for preheating, cooling, and/or calcining fine-grained materials comprises at least three stages located one above the other, each stage comprising the following components: a. a gas-solid suspension pipeline for conducting a gas-solid suspension, b. means for separating the introduced solid material from the introduced gas, c. a solid material pipeline for removing the separated solid material, d. and a gas pipeline for removing the separated gas, the gas pipeline of one stage transitioning into the gas-solid suspension pipeline of the next higher stage, and the solid material pipeline of a stage opening into the gas-solid suspension pipeline of the next lower stage. The opening of the solid material pipeline into the gas-solid suspension pipeline of the third or higher stage is further provided below the highest point of the gas-solid suspension pipeline disposed two stages lower.
F27B 7/20 - Rotary-drum furnaces, i.e. horizontal or slightly inclined - Details, accessories, or equipment peculiar to rotary-drum furnaces
B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
B01D 45/12 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
C04B 7/43 - Heat treatment, e.g. precalcining, burning, melting; Cooling
The invention relates to a force transfer system comprising a hydraulic cylinder (1) comprising a piston (10) which can be impinged with hydraulic fluid and a thrust bearing (2) which is in operative contact with the piston, said bearing comprising a first and a second glide surface for exerting a sliding motion. The thrust bearing comprises a pressure space (25) which is connected to the side of the piston (10) impinged with hydraulic fluid by way of at least one hole (11) made in the piston.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
20.
LABORATORY SYSTEM HAVING A TRANSPORT UNIT FOR SAMPLES AND A MONITORING SYSTEM FOR MAINTAINING A SAFE DISTANCE
The laboratory system according to the invention substantially comprises a transport unit for samples, at least two treatment units (3-9) for the preparation, analysis, and/or processing of samples, at least one displaceable handling device (10) for handling the samples in the region of a treatment unit, wherein the handling device is configured for the transfer of the sample between the transport unit and the handling device, and a monitoring system (30) for maintaining a safe distance. The handling device can be displaced between at least two treatment units and the monitoring system is a monitoring system, which can be displaced along with the handing device and is formed by a camera (21) moving along with the same for creating distance images and/or a positioning system having at least one transmitter to be worn by laboratory personnel, and at least one receiver moving along with handling device. The receiver of the positioning system is configured such that it generates an alarm signal if the at least one transmitter falls short of a minimum distance to the receiver.
The roller mill required for the method according to the invention for the crushing of ground stock substantially comprises a grinding plate (1), at least two grinding rollers (3,4), at least two drives (5,6) for driving the grinding rollers (3,4), wherein the one drive (5) is associated with the one grinding roller (3) and the other drive (6) is associated with the other grinding roller (4), at least one pressing system (7) for individually adjusting the grinding pressure of each grinding roller (3,4), and a balancing control device for the drives (5,6). The balancing control device is formed by an output balance controller, wherein the output of the drives (5, 6) is controlled by controlling the grinding pressure of at least one of the grinding rollers (3, 4) at a predetermined ratio to one another.
The invention relates to a tube mill for the wet grinding of lumpy material with a grinding cylinder, an inlet opening for inlet of lumpy material, means for addition of an aggressive medium and also an outlet opening (5), wherein the grinding cylinder has an internal lining of epoxy material.
The device according to the invention for performing chemical and/or physical reactions between a solid material and a gas, particularly for preheating, cooling, and/or calcining fine-grained materials, is made substantially of a helical and/or spiral pipe in which the gas-solid suspension is separated into a solid stream and a gas stream by centrifugal forces, and at least one deposition area connected to the end of the helical or spiral pipe, a solid material pipe for removing the solid stream and a gas pipe for removing the gas stream being connected to said deposition area. The deposition area is formed by a lower part of the gas pipe, the deposition area in the area of the opening of the helical and/or spiral pipe and the part of the gas pipe connecting thereabove having the same diameter. The helical and/or spiral pipe opens to form a twisting flow tangential to and at an angle of at least 30° to the horizontal in the deposition area.
F27B 7/20 - Rotary-drum furnaces, i.e. horizontal or slightly inclined - Details, accessories, or equipment peculiar to rotary-drum furnaces
B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
The device according to the invention for performing chemical and/or physical reactions between a solid material and a gas, particularly for preheating, cooling, and/or calcining fine-grained materials comprises a plurality of stages located one above the other, each stage comprising the following components: a. a gas-solid suspension pipe for conducting a gas-solid suspension formed at least partially as a helical and/or spiral pipe, b. means for separating the introduced solid material from the introduced gas, c. a solid material pipe for removing the separated solid material, d. and a gas pipe for removing the separated gas, the gas pipe of one stage transitioning into the gas-solid suspension pipe of the next higher stage, and the solid material pipe of a stage opening into the gas-solid suspension pipe of the next lower stage. The helical and/or spiral pipes of at least two successive stages are further oriented in alternating left-hand and right-hand directions.
The device according to the invention for separating a solid material and a gas is made substantially of a riser for conducting a gas-solid suspension having a solid material feed opening for feeding a solid material and a gas feed opening for feeding a gas, a descending helical and/or spiral pipe in which the gas-solid suspension is separated into a solid stream and a gas stream by centrifugal forces, a deflection head connecting the riser to the helical and/or spiral pipe, at least one bend in the pipe run being provided in the region of the deflection head, and a solid material pipe for removing the solid stream connected to the end of the helical and/or spiral pipe, and a gas pipe for removing the gas stream connected to the end of the helical and/or spiral pipe.
The invention relates to a roll mill having a grinding plate (2) which can rotate about an axis (1) of rotation, at least one grinding roller (3, 4) which engages in a rolling manner with the grinding plate (2), and a main drive (5) for driving the grinding plate (2). Furthermore, an auxiliary drive (13) is provided for driving the grinding plate (2) and a regulating device (15), wherein the regulating device (15) has at least one damping regulator (16, 21) which regulates the auxiliary drive (13) according to torque variations of the main drive (5) and/or rotary speed variations of the grinding plate (2).
B02C 15/00 - Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
B02C 23/00 - Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in groups or not specially adapted to apparatus covered by one only of groups
F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts
27.
ROLLER PRESS WITH RETRACTABLE GRINDING MATERIAL GUIDE METAL SHEET
The invention relates to a bed roller mill with two rollers (1, 2) rotatably mounted in a machine frame (3) and driven in opposite directions, of which the gap between the rollers, which is covered with the grinding material to be crushed, is delimited from above by a grinding material guide metal sheet on the front sides of said gap during operation of the roller mill. Said metal sheet can be removed from the operating position thereof, wherein a) the grinding material guide metal sheet (5) can be moved upward and away from the front side of the roller gap relative to the operating position thereof such that the rollers (1, 2) can be removed from the machine frame (3) in the horizontal direction; b) during said movement the grinding material guide metal sheet (5) is guided by guide bodies along an arc-shaped guiding device; and c) in the operating position the grinding material guide metal sheet (5) is supported on the outside against the forces exerted by the grinding material by support elements which are rotatably connected to the grinding material guide metal sheet.
The invention relates to a roller press with two rollers (1, 2) mounted rotatably in a frame (3, 4, 5, 6). For fitting or removing the rollers, at least one head element (5, 6) of the frame can be moved out of its operating position by being displaced outwards in the transverse direction. Such a configuration is distinguished by low-cost production of the roller press and time-saving fitting and removal of the rollers.
In the process of the invention for producing cement by blending of hydraulic clinker and a latently hydraulic mineral mixture, the hydraulic clinker is fired separately from the latently hydraulic mineral mixture. The raw materials of the latently hydraulic mineral mixture are put together so that the latently hydraulic mineral mixture has a proportion of from 30 to 40% by weight of CaO and the latently hydraulic mineral mixture is produced by subsequent firing or fusion of these raw materials and cooling.
The invention relates to an apparatus (100) for sifting feedstock (1), comprising: a. a static sifter (2) that has a ventilated bottom (4) which is oriented at an angle to the vertical and is penetrated by sifting gas (3); b. an inlet (9) for feeding the feedstock (1) to the ventilated bottom; c. (4) an outlet (10) for the coarse material; d. a dynamic sifter (5) that is mounted downstream and encompasses at least one rotor (6) with rotor blades (15) and a horizontal rotor axis; e. at least one outlet (19) for the sifting gas loaded with fine material; and f. a housing (8) inside which the static and the dynamic sifter (5) are arranged. The housing area surrounding the dynamic sifter is designed as a housing spiral such that the sifting gas (3) flows against the rotor (6) in a substantially tangential direction. The rotor (6) rotates (14) counter to the direction of flow of the sifting gas (3) in the housing spiral.
B07B 4/08 - Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
B07B 9/02 - Combinations of similar or different apparatus for separating solids from solids using gas currents
31.
METHOD AND DEVICE FOR SEPARATING OR CLASSIFYING MATERIAL TO BE FED
The device (100) according to the invention for separating or classifying material (1) to be fed into at least two different grain fractions (2, 3) comprises a screen device (5), which is formed by rotatable elements (8), particularly a roller table screen, wherein at least one finer grain fraction (2) passes between the rotatable elements (8) and means (14) are provided for cooling the rotatable elements.
The device (100) according to the invention for separating or classifying material (1) to be fed into at least two different grain fractions (2, 3) comprises a screen device (5), which is formed by rotatable elements (8), particularly a roller table screen, wherein at least one finer grain fraction (2) passes between the rotatable elements (8) and means (14) are provided for cooling the rotatable elements.
The invention relates to a grinding roller of a high-pressure bed roller mill with profiled members (2', 3', 4') a part of the length of which is inserted into bores (12, 13, 14) of the roller body (I'), and the remaining part of the length of which projects over the surface of the roller body (1'), wherein in the novel state of the grinding roller, the bores (12, 13, 14) have varying depths in differently occupied parts of the width of the roller body, and the profiled members (2', 3', 4') have varying lengths. With this type of design, with low cost production is achieved long service life of the roller and cost-effective reconditioning after operation-related wear.
The invention relates to a method for reconditioning a used grinding roller of a bed grinding mill having profiled members which are mounted in bores of the roller element by a part of their length, the other part of their length projecting beyond the surface of the roller element. For the reconditioning, the worn surface of the roller element is turned following removal of the worn profiled members and a material layer is applied in a welding process. The material layer is then provided with bores for receiving new profiled members. Such a method enables a particularly cost-effective reconditioning.
The invention relates to a roller mill comprising a mill housing, a milling track rotatably supported about a milling axis inside the mill housing, and at least one milling roller, which can be rotated about a milling roller axis and is in rolling engagement with the milling track. Furthermore, an oscillating arm is provided for the rotatable mounting of the milling roller, the arm having a tilt axis, which is disposed parallel to the milling roller axis and is supported outside the mill housing. In addition, the oscillating arm is in operative contact with a hydropneumatic spring system in order to adjust the contact pressure of the milling roller. The oscillating arm is supported outside the milling housing at a distance thereto such that the forces produced by the hydropneumatic spring system are transferred directly, or via pylons, into the mill foundation.
The invention relates to a method for comminuting material to be ground using a roller mill (1) which comprises a grinding plate, at least one grinding roller and at least two drives (13, 14) for driving the roller mill, wherein there is provided a power-matching controller (22) for the drives (13, 14) which by controlling the rotational speed of at least one drive controls the power of the drives (13, 14) at a predetermined ratio to one another.
The invention relates to a roller mill comprising two grinding rollers (1; 2) driven in opposite directions, wherein each grinding roller (1; 2) has a base roller body (10), which is equipped with a plurality of profiled bodies (11). Furthermore, a monitoring device (3) is provided, which is configured such that it detects the presence or absence of profiled bodies (11). The invention further relates to a method for checking the roller mill.
The invention relates to a mill for disintegrating material to be ground, comprising at least one grinding roll which interacts with an opposed surface in such a way that the material to be ground is disintegrated between the grinding roll and opposed surface, and comprising a pressing system to exert a force on the material to be ground via the grinding roll, wherein the pressing system substantially comprises a hydropneumatic accumulator (50), at least one working cylinder (51) and at least one impulse damper (52), wherein the working cylinder (51) is connected via connecting lines (53, 54) to the hydropneumatic accumulator (50) and to the impulse damper (52) and the force generated by the working cylinder (51) is transmitted to the at least one grinding roll. The length of the connecting line (53) between the working cylinder (51) and hydropneumatic accumulator (50) is at least three times as long as the length of the connecting line (54) between the working cylinder (51) and impulse damper (52). Furthermore, the length of the connecting line (54) between the working cylinder (51) and impulse damper (52) is less than 0.5 m, preferably less than 0.33 m.
The invention relates to a roller mill comprising at least one grinding roller and a rotatable grinding plate, which are arranged in an inner space of the mill, and also a force arm which is held pivotably and in a rotationally fixed manner in a bearing, wherein the grinding roller is mounted such that it can rotate on an end of the force arm, and there are also provided means for exerting a force on the force arm that comprise a pressure cylinder which is in operative contact with the force arm, in order to adjust the grinding pressure exerted by the grinding roller. The contact point at which the force of the pressure cylinder is transmitted to the force arm is in this case situated outside the inner space of the mill.
The roller mill according to the invention comprises two rotatably mounted, oppositely rotating rollers which form a roller nip between them. Each of the two rollers is provided with at least a first and a second region which have different diameters, with the result that the roller mill has at least one section with a smaller roller nip and at least one section with a larger roller nip.
The invention relates to a roller mill or roll mill comprising at least one grinding roller or grinding roll and a jewel bearing that is slidable in a machine frame and is used for accommodating the grinding roller or grinding roll. At least one plain bearing encompassing at least one gliding element and at least one opposite bearing surface is provided between the jewel bearing and the machine frame. The opposite bearing surface is fitted with a coating that has a minimum hardness of 40 GPa. The invention further relates to a roll mill comprising at least one grinding roll and a rotatable grinding plate. The grinding roll is attached to a lever that is mounted within a drag bearing which is provided with at least one gliding surface and at least one opposite bearing surface. The opposite bearing surface is fitted with a coating having a minimum hardness of 40 GPa.
The invention relates to a cooler for cooling bulk material, in particular for cooling cement clinker, having a bearing surface for supporting the bulk material, conveying elements for transporting the bulk material, which can move to and fro relative to a supporting structure, and a vent device for supplying a cooling medium to the bulk material. One or more sliding-contact bearings, which each have at least one sliding element and at least one opposing running surface, are provided between the conveying elements that can move to and fro and the supporting structure, and the opposing running surface has a coating with a hardness of at least 40 GPa.
The invention relates to a roll mill having a grinding plate and at least one grinding roll rolling on the grinding plate, wherein material which is to be comminuted, after being subjected to loading in a gap formed between the grinding plate and grinding roll, is directed away over the periphery of the grinding plate and, furthermore, a stationary accumulating edge, which does not rotate along with the grinding plate, is provided, at least on that side of the grinding roll which is directed towards the periphery of the grinding plate, this accumulating edge forming at least part of an elevation of the periphery of the grinding plate. The elevation of the periphery of the grinding plate here is higher in the region of the grinding rolls than in the region between the grinding rolls, in order to prevent the material which is to be comminuted from escaping radially from the gap formed between the grinding plate and grinding roll.
B02C 18/04 - Disintegrating by knives or other cutting or tearing members which chop material into fragments; Mincing machines or similar apparatus using worms or the like with reciprocating knives - Details
The invention relates to a method for reconditioning a used grinding roll of a high-pressure bed grinding mill. In said method, the surface of the rolling body is turned by a certain degree after removing the worn profiled members, whereupon the existing bores can be deepened to a depth that is sufficient for receiving new profiled members or new bores can be created according to a new bore pattern. New profiled members are then inserted into the bores. The inventive method allows a used grinding roll to be reconditioned in a particularly time-saving manner while economizing material.
The invention relates to an apparatus and method for cooling bulk materials, the physical and chemical properties of which depend on the cooling medium, comprising: a. a base through which a cooling medium can flow and on which the bulk material is transported and cooled in the process, b. means for feeding a gaseous, non-oxidizing cooling medium, for example water vapour, c. means for the separate discharge of the heated, non-oxidizing cooling medium, d. a device for the thermal treatment of the discharged, heated, non-oxidizing cooling medium, e. means for recirculating the thermally treated, non-oxidizing cooling medium to the means for feeding the non-oxidizing cooling medium, f. means for feeding a gaseous, oxidizing cooling medium, for example air, g. means for the separate discharge of the heated, oxidizing cooling medium, h. and comprising a plurality of cooler sections and associated means for setting and regulating the cooling medium flows in order to optionally set either non-oxidizing cooling conditions or oxidizing cooling conditions in all the cooler sections or in individual cooler sections.
The system according to the invention for producing cement clinkers from raw cement mix is composed substantially of a pre-warmer for pre-warming the raw cement mix, a calcination device for pre-calcining the pre-warmed raw cement mix, a sintering kiln for firing the pre-calcined raw cement mix to form cement clinkers, and a cooler for cooling the fired cement clinker. Additionally provided between the cooler and the calcination device is a tertiary air line via which tertiary air is supplied to the calcination device. The calcination device is additionally traversed by the waste gases of the sintering kiln and has a calcining nozzle in its inlet region. Also provided are means for setting the cross section of the calcining nozzle, which means are formed by at least one element which is arranged in a rotatable or pivotable fashion in order to set the cross section and which is exposed to the waste gases of the sintering kiln.
F27B 7/20 - Rotary-drum furnaces, i.e. horizontal or slightly inclined - Details, accessories, or equipment peculiar to rotary-drum furnaces
C04B 7/43 - Heat treatment, e.g. precalcining, burning, melting; Cooling
F16K 1/16 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members
The invention relates to a plant and a process for producing cement clinker comprising a rotary tube furnace for firing preheated and, if appropriate, precalcined material to give cement clinker and a cooler for cooling the fired cement clinker, with the one furnace and the one cooler being operated so that a total production of at least 14 000 t/day is obtained. The increase in the throughput capacity of the rotary tube furnace is a result of a higher speed of 8 revolutions per minute and a higher load. Cooler capacity is increased by a better distribution of the clinker by means of a static grate. The capacities of furnace and cooler can also be increased by using interior conveyor elements of the walking floor type.
F27D 3/00 - Charging; Discharging; Manipulation of charge
F27B 7/18 - Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being movable within the drum
The invention relates to a method for operating a rotary kiln for burning mineral material, wherein the material is moved from the inlet to the outlet by the rotary motion of the rotary kiln and a transmission of heat to the material to be burned thereby takes place by means of at least one heat source. To increase the surface area of the material to be burned that is exposed to the heat source, the rotational speed of the rotary kiln is increased to over 7.0, preferably over 8 rpm, and the rotary kiln is at the same time loaded with over 7 tonnes per day/m3, preferably over 7.5 tonnes per day/m3.
The invention relates to a system and a method for producing cement clinker from raw meal. According to the invention, the raw meal is preheated in a preheating zone, is precalcined in a calcination zone, is burned in a sinter burning zone, and is cooled in a cooling zone while solid combustibles are burned in an additional burning zone in which a firing area is used, the solid combustible being introduced into the firing area and forming a combustible bed therein over which a delivered oxygen-containing gas flows, the obtained combustion products being discharged via a discharge port and being utilized during the production of cement clinker. The combustible is delivered via a conveying device located outside the firing area so as to move the existing combustible bed in the direction of the discharge port.
The invention relates to an apparatus (100) for classifying charge material (9), comprising a static classifier (1) which has a ventilating base (1a) oriented obliquely to the vertical and traversed by classifying gas (2); an inlet opening (3) for charging the charge material to the ventilating base; an outlet opening (4) for the coarse material; a downstream dynamic classifier (5) which comprises at least one rotor; and at least one outlet opening for the classifying gas (2’) laden with fine material. The ventilating base has a ratio of width to vertical height (H) of at least 0.45, preferably of at least 0.6.
B07B 9/02 - Combinations of similar or different apparatus for separating solids from solids using gas currents
B07B 4/08 - Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
51.
SYSTEM AND METHOD FOR THE PRODUCTION OF CLINKER FROM RAW CEMENT MATERIAL
The invention relates to a device and a method for producing clinker from raw cement material. The raw cement material is preheated in a preheater, is precalcined in a calcining apparatus, is completely burned in a sintering furnace, and is finally cooled in a cooler. Tertiary air of the cooler is fed to the calcining apparatus while eliminated dust is thermally treated in a dust burning reactor with the aid of combustion air and fuel. At least some of the tertiary air is fed to the dust burning reactor as combustion air while the dust that is to be treated and the combustion air penetrate the dust burning reactor in the same direction of flow.
The invention relates to a device and method for drying and deagglomerating moist feed material, whereby the feed material is kneaded, mixed and broken up by the action of at least one roller rolling on a driven plate and is dried by means of hot gas supplied thereto. The invention also relates to a method for converting this device into a mill drying device, whereby the at least one roll is provided with a pressing device.
The invention relates to a vertical mill comprising a grinding track (1) and at least one grinding roller (2). The grinding track (1) is provided with a central zone (Ia) made of a harder material and two laterally adjacent edge zones (Ib, Ic) made of a softer material. The width (a) of the central zone (Ia) is smaller than or equal to the width of the grinding roller (2).
The invention relates to a milling station and a method for grinding milling material by means of at least one coarse grinding circuit (1) and at least one fine grinding circuit (2). The coarse grinding circuit is provided with a classifier (10) and a material bed roller mill (11). The precrushed material of the material bed roller mill is fed to the classifier whose coarse material is redirected to the material bed roller mill and whose fine material is delivered to the fine grinding circuit. The fine grinding circuit encompasses a tube mill (20) with at least two grinding chambers (20a, 20b), a central outlet (20c), and a divider (21). At least some of the milling material of the coarse grinding circuit is subdivided in the divider and is delivered to the two grinding chambers while the milling material is jointly discharged from the two grinding chambers via the central outlet.
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