Abstract

The invention relates to a conveying device (1) for bulk material (20), with a conveyor (2) for transporting bulk material (20) in a conveying direction (C), a hood (3) extending above the conveyor (2), and a sealing device (4) that is attached to the hood (3) and configured to hinder gas exchange along the conveying direction (C). In order to provide an effective and reliable seal between bulk material on a conveying device and a hood extending over the conveying device, the invention provides that the sealing device (4) comprising at least one flexible sealing sheet (7) having an upper end (7.1) and a lower end (7.2); and at least one sliding block (6) configured to be in sliding contact with the bulk material (20) wherein the upper end (7.1) of the flexible sealing sheet (7) is connected to the hood (3) and the lower end (7.2) of the flexible sealing sheet (7) is connected to the sliding block (6).

IPC Classes  ?

• F27B 21/02 - Sintering grates or tables
• F27B 21/06 - Endless-strand sintering machines
• F27D 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

The invention relates to a side wall (24) of a pallet car (10) for a travelling grate machine. According to the present invention, the side wall (24) comprises an upright portion (30), a wing portion (32) and a lower connection flange (34, 34'). The wing portion (32) has an upper surface acting as an extension of a loading surface of the pallet car (10), the upper surface (60) of the wing portion (32) being arranged at an angle with respect to the horizontal.

IPC Classes  ?

• F27B 9/26 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatmentFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path on or in trucks, sleds, or containers
• F27B 21/06 - Endless-strand sintering machines
• F27D 3/12 - Travelling or movable supports or containers for the charge

Abstract

A burner assembly for top combustion hot blast stove comprising a burner surrounded by a burner shell, wherein said burner has a circular cross-section; a number of air nozzles arranged for tangentially feeding air to the burner, the air nozzles being connected to one or more air distribution chambers;a number of gas nozzles arranged for tangentially feeding gas to the burner, the gas nozzles being connected to one or more gas distribution chambers;wherein the air nozzles are arranged in one or more inclined or vertical stacked arrays of air nozzles, each inclined or vertical stacked array being in connection with one inclined or vertical air distribution chamber; the gas nozzles are arranged in one or more inclined or vertical stacked arrays of gas nozzles, each inclined or vertical stacked array being in connection with one inclined or vertical gas distribution chamber; and the inclined or vertical air distribution chamber(s) and the inclined or vertical gas distribution chamber(s) are arranged along the circumference of the burner shell.

IPC Classes  ?

• F23C 3/00 - Combustion apparatus characterised by the shape of the combustion chamber
• F23C 5/32 - Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
• F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
• C21B 9/02 - Brick hot-blast stoves

Abstract

In a blast furnace plant (10), at least three regenerative heaters (14.1, 14.2, 14.3) are cyclically operated on blast and on gas: while a regenerative heater is operated on gas, hot flue gas is produced and caused to flow through the regenerative heater so as to heat the heat storage elements (46); and while a regenerative heater is operated on blast, process gas (32), i.e. a CO-rich fraction of the top gas (16), is blown through the regenerative heater so that the process gas takes up heat from the heat storage elements. During a changeover of a regenerative heater from on-blast to on-gas operation, the regenerative heater is purged from process gas using flue gas collected after having flown through at least one of the regenerative heaters.

IPC Classes  ?

• C21B 5/06 - Making pig-iron in the blast furnace using top gas in the blast furnace process
• C21B 9/14 - Preheating the combustion air

Abstract

A heat pipe heat exchanger (12, 12') for transferring heat from a hot gas to a cold gas comprises a housing with a first chamber (14) for feeding a hot gas therethrough; a second chamber (20) for feeding a cold gas therethrough; and a plurality of heat pipes (26) extending between the first chamber (14) and the second chamber (20) for transferring heat from the hot gas to the cold gas. The heat pipe heat exchanger (12, 12') further comprises one or more heat pipe cartridges (36) removably arranged in the housing. Each heat pipe cartridge (36) comprises a frame (38) with a support panel (40) for supporting a plurality of heat pipes (26); the support panel (40) being arranged such that, when the heat pipe cartridge (36) is arranged in the housing, the support panel (40) cooperates with a separation wall (32) between the first chamber (14) and the second chamber (20) to form a gas-tight partition between the first and second chambers (14, 20). The heat pipes (26) traverse the support panel (40) and are secured thereto in a gas-tight manner.

IPC Classes  ?

• F28D 15/02 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes

Abstract

The present invention proposes a burner unit (10) for steel making facilities, in particular for use in connection with a regenerative or recuperative heat generator, wherein the burner unit (10) comprises a mixing zone (18); a plurality of fuel feed channels (32) for feeding combustible fuel to the mixing zone (18); and a plurality of air feed channels (34) for feeding combustion air to the mixing zone (18). According to an important aspect of the invention, the burner unit (10) comprises a primary burner (42) with an annular feed arrangement (30) comprising circumferentially alternating fuel feed channels (32) and air feed channels (34); a central channel (44) through the annular feed arrangement (30) and a secondary burner (46) arranged in the central channel (44) of the burner unit (10), the central channel (44) being coaxial with the annular feed arrangement (30).

IPC Classes  ?

• F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other

Abstract

The present invention proposes a device (10) for regulating the temperature of a gas in a hot gas main for feeding hot gas to a blast furnace. Such a device (10) comprises a mixing pot (14) with a first mixing chamber (16) and a second mixing chamber (18), the first and second mixing chambers (16, 18) being in fluid communication with each other by means of a Venturi-type restriction (20). The first mixing chamber (16) is provided with a first inlet port (22) for feeding hot gas into the first mixing chamber (16), a second inlet port (26) for feeding cold gas into the first mixing chamber (16) and a third inlet port (56) for feeding cold gas into the second mixing chamber (18). The first mixing chamber (16) is further provided with a first outlet port (42) for feeding a first stream of mixed gas from the first mixing chamber (16) to a first gas distribution system (46), while the second mixing chamber (18) is provided with a second outlet port (60) for feeding a second stream of mixed gas from the second mixing chamber (18) to a second gas distribution system (64). The first stream of mixed gas has a temperature different from a temperature of the second stream of mixed gas.

IPC Classes  ?

• C21B 9/16 - Cooling or drying the hot-blast
• F23J 15/06 - Arrangements of devices for treating smoke or fumes of coolers
• F27B 1/16 - Arrangements of tuyères
• C21B 5/06 - Making pig-iron in the blast furnace using top gas in the blast furnace process

Abstract

The present invention proposes a bustle pipe arrangement (10) of a shaft furnace, in particular for feeding hot gas into the shaft furnace such as e.g. a blast furnace, wherein the bustle pipe arrangement (10) comprises a circumferential bustle pipe (12) arranged along the outer casing (14) of the shaft furnace, the bustle pipe (12) being arranged at a certain distance form the outer casing (14). The arrangement (10) further comprises a plurality of first arms (22) connecting the bustle pipe (12) to the outer casing (14) of the shaft furnace on a first level; and a plurality of second arms (24) connecting the bustle pipe (12) to the outer casing (14) of the shaft furnace on a second level, the first level being different from the second level. First and second blow channels (26, 30) are respectively arranged through the first and second arms (22, 24) for fluidly connecting the bustle pipe (12) to the interior of the shaft furnace.

IPC Classes  ?

• F27B 1/16 - Arrangements of tuyères
• C21B 7/16 - Tuyères
• C21B 9/10 - Other details, e.g. blast mains

Abstract

The present invention proposes a bustle pipe arrangement (10) of a shaft furnace, in particular for feeding hot gas into the shaft furnace such as e.g. a blast furnace, wherein the bustle pipe arrangement (10) comprises a circumferential bustle pipe (12) arranged along the outer casing (14) of the shaft furnace, at a certain distance therefrom. The arrangement (10) further comprises a plurality of first support arms (22) connecting the bustle pipe (12) to the outer casing (14) of the shaft furnace on a first level; and a plurality of second support arms (24) connecting the bustle pipe (12) to the outer casing (14) of the shaft furnace on a second level, the first level being separate from the second level. The first and second support arms (22, 24) are configured to support the circumferential bustle pipe (12). First blow channels (26) are arranged through the first support arms (22) for fluidly connecting the bustle pipe (12) to the interior of the shaft furnace.

IPC Classes  ?

• F27B 1/16 - Arrangements of tuyères
• C21B 7/16 - Tuyères
• C21B 9/10 - Other details, e.g. blast mains

Abstract

A checker brick (10), in particular for hot blast stove, has a top surface (12) and an opposite bottom surface (14), wherein a plurality of through passages (16) extend from the top surface (12) to the bottom surface (14) for allowing fluids to circulate through the checker brick (10), partition walls (18) being formed between neighbouring through passages (16). According to an aspect of the invention, the through passages (16) have a cross-section based on a hexagonal shape (20) having alternating convex (24) and concave sides (26).

IPC Classes  ?

• F27D 1/04 - CasingsLiningsWallsRoofs characterised by the form of the bricks or blocks used

Abstract

The present invention proposes a ceramic burner (20) for use in a combustion chamber (12) of a regenerative heat generator, such as a hot blast stove (10) of a blast furnace. The ceramic burner (20) comprises a burner feed chamber (21 ) with a partition wall (30) for dividing the burner feed chamber (21 ) into a fuel chamber (24) and an air chamber (28). The fuel chamber (24) has a fuel inlet (22) for receiving combustible fuel and a fuel outlet (32) for feeding the combustible fuel to a mixing zone (34). The air chamber (28) has an air inlet (26) for receiving combustion air and an air outlet (36) for feeding the combustion air to the mixing zone (34). According to an important aspect of the invention, the ceramic burner (20) further comprises a gastight metallic fuel container (48) arranged in the burner feed chamber (21 ), the fuel container (48) comprising the fuel chamber (24) therein, a wall portion of the fuel container (48) forming the partition wall (30) between the fuel chamber (24) and the air chamber (28).

IPC Classes  ?

• F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
• C21B 9/00 - Stoves for heating the blast in blast furnaces

Abstract

The present invention proposes a method for constructing a support ring in a curved wall, in particular around an opening in a curved wall of a hot blast stove, wherein the method comprises providing a plurality of standardised wedge-shaped bricks (12, 14, 16, 18, 20, 22) with side faces (32, 34) having tongue and groove profiles (36, 38) for cooperating with the side faces of the neighbouring bricks, the thickness (T) of the brick in the axial direction being in excess of the desired end thickness (t) of the brick. The method comprises determining the intended location of each individual brick in the curved wall and determining, based on the intended location, the location of a front cut line (56) and a rear cut line (58) for shaping the front and rear faces (24, 26) of the brick. The front and rear faces (24, 26) of the brick are then shaped in accordance with the above determined front and rear cut lines (56, 58) by means of a cutting tool.

IPC Classes  ?

• C21B 7/06 - Linings for furnaces
• C21B 9/06 - Linings