Abstract

Provided is a method and system for preparing a carbonyl nickel powder using laterite-nickel ore. The method comprises: (1) mixing and pelletizing laterite-nickel ore, high-sulphur coal, and additives to obtain pellets; (2) reducing the pellets; (3) subjecting the reduced metallized pellets to water quenching-ore grinding-magnetic separation treatments to obtain a nickel iron powder and tailings; and (4) bringing the nickel iron powder into contact with carbon monoxide for reaction, and then performing purification and decomposition treatments so as to obtain the carbonyl nickel powder, with the carbon monoxide being recycled, wherein the use of the high-sulphur coal results in a highly active nickel iron powder, it is not necessary to add any catalyst in the process of producing the carbonyl nickel powder, and the synthesis efficiency is high.

IPC Classes  ?

• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 5/00 - General processes of reducing to metals
• C22B 23/00 - Obtaining nickel or cobalt
• C01G 53/02 - Carbonyls

Abstract

Provided are a melting separation furnace and a method for treating a material to be melted and separated with the melting separation furnace. The melting separation furnace comprises a melting separation furnace body (100), which has a melting separation space (10) inside, wherein the bottom of the melting separation space (10) defines a melting pool (11), a feeding zone (12), a melting zone (13), a separation zone (14) and a discharge zone (15) are formed successively in the melting separation space (10) along a melt flow direction, the feeding zone (12) is located at one end of the melting separation furnace body (100), the discharge zone (15) is located at the other end of the melting separation furnace body (100), a feeding port (101) is provided on a side wall of the feeding zone (12), and a discharge port (102) and a slag exit (103) are provided on a side wall of the discharge zone (15); and first regenerative burners (200), wherein at least one pair of first regenerative burners (200) are provided correspondingly at the melting zone (13), each pair of first regenerative burners (200) are arranged on the opposite side walls of the melting separation furnace body (100), and each first regenerative burner (200) comprises a nozzle (22), a fuel gas slag chamber (23), an air slag chamber (24), and a fuel gas regenerative chamber (25) and an air regenerative chamber (26); and second regenerative burners (300), wherein at least one pair of second regenerative burners (300) are provided correspondingly at the separation zone (14), and each pair of second regenerative burners (300) are arranged on the opposite side walls of the melting separation furnace body (100).

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

Provided are a melting separation furnace and a method for treating a material to be melted and separated with the melting separation furnace. The melting separation furnace comprises a melting separation furnace body (100), wherein a melting separation space (10) is inside the melting separation furnace body (100), the bottom of the melting separation space (10) defines a melting pool (11), a feeding zone (12), a melting zone (13), a separation zone (14) and a discharge zone (15) are formed successively in the melting separation space (10) along a melt flow direction, the feeding zone (12) is located at one end of the melting separation furnace body (100), the discharge zone (15) is located at the other end of the melting separation furnace body (100), a feeding port (101) is provided on a side wall of the feeding zone (12), and a discharge port (102) and a slag exit (103) are provided on a side wall of the discharge zone (15); and a plurality of regenerative burners (200), wherein the plurality of regenerative burners (200) are respectively arranged on side walls of the melting separation furnace body (100), both the melting zone (13) and the separation zone (14) are correspondingly provided with at least one pair of regenerative burners (200), and each pair of regenerative combustors (200) are arranged on the opposite side walls of the melting separation furnace body (100).

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

Provided is a method and system for preparing a carbonyl nickel powder using laterite-nickel ore. The method comprises: (1) mixing and pelletizing laterite-nickel ore, high-sulphur coal, and additives to obtain pellets; (2) reducing the pellets; (3) subjecting the reduced metallized pellets to water quenching-ore grinding-magnetic separation treatments to obtain a nickel iron powder and tailings; and (4) bringing the nickel iron powder into contact with carbon monoxide for reaction, and then performing purification and decomposition treatments so as to obtain the carbonyl nickel powder, with the carbon monoxide being recycled, wherein the use of the high-sulphur coal results in a highly active nickel iron powder, it is not necessary to add any catalyst in the process of producing the carbonyl nickel powder, and the synthesis efficiency is high.

IPC Classes  ?

• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 5/00 - General processes of reducing to metals
• C22B 23/00 - Obtaining nickel or cobalt
• C01G 53/02 - Carbonyls

Abstract

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore powder in a fluidized bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; performing desulfurization and decarburization processing on the reduction exhaust to obtain a purified reduction exhaust; and introducing the purified reduction exhaust into the fluidized bed reduction reactor (200). By using the method, ore powder can be effectively reduced, thereby saving the cost and improving the reduction efficiency of the ore powder.

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore pellets in a mobile bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; performing desulfurization and decarburization processing on the reduction exhaust to obtain a purified reduction exhaust; and introducing the purified reduction exhaust into the mobile bed reduction reactor (200). By using the method, ore powder can be effectively reduced, thereby saving the cost and obviously improving the reduction efficiency of the ore powder.

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore powder in a conveying bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; performing desulfurization and decarburization processing on the reduction exhaust to obtain a purified reduction exhaust; and introducing the purified reduction exhaust into the conveying bed reduction reactor (200). By using the method, ore powder can be effectively reduced, thereby saving the cost and improving the reduction efficiency of the ore powder.

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore powder in a conveying bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; mixing the reduction exhaust with the reducing gas and then performing desulfurization and decarburization processing to obtain a purified gas mixture; and introducing the purified gas mixture into the conveying bed reduction reactor (200). By using the method, ore powder can be effectively reduced, thereby saving the cost and improving the reduction efficiency of the ore powder.

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore powder in a fluidized bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; and introducing the reduction exhaust into the fluidized bed reduction reactor (200). The introducing the reduction exhaust into the fluidized bed reduction reactor (200) also comprises: mixing the reduction exhaust with the reducing gas in advance and then performing desulfurization and decarburization processing to obtain a purified gas mixture; and introducing the purified gas mixture into the fluidized bed reduction reactor (200). By using the method, ore powder can be effectively reduced, thereby saving the cost and obviously improving the reduction efficiency of the ore powder.

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore pellets in a mobile bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; mixing the reduction exhaust with the reducing gas and then performing desulfurization and decarburization processing to obtain a purified reduction exhaust ; and introducing the purified reduction exhaust into the mobile bed reduction reactor (200). By using the method, ore pellets can be effectively reduced, thereby saving the cost and improving the reduction efficiency of the ore pellets.

IPC Classes  ?

• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

A catalytic purification and heat exchange system comprises: a housing, a heat exchanger main body, a partition member, heat carriers, a fume passage, and an air passage, wherein the housing defines a chamber. The heat exchanger main body is disposed in the chamber and is rotatable around a central axis of the heat exchanger main body. The partition member is disposed in the heat exchanger main body along the central axis, and divides the heat exchanger main body into a first accommodating portion and a second accommodating portion opposite to each other. The heat carriers contain catalysts, and are respectively accommodated in the first accommodating portion and the second accommodating portion. The fume passage is arranged to be communicated with one of the first accommodating portion and the second accommodating portion. The air passage is arranged to be communicated with the other one of the first accommodating portion and the second accommodating portion, so that air exchanges heat with the heat carrier accommodated therein.

IPC Classes  ?

• F28D 17/02 - Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
• F28D 17/00 - Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles

Abstract

A powdered solid fuel boiler equipped with a regenerative rotating commutating heater comprises a hearth, a regenerative rotating commutating heater, a fume passage, and an air passage. An inlet end of the fume passage is communicated with a top portion of the hearth, and an outlet end of the fume passage is communicated with the regenerative rotating commutating heater. The regenerative rotating commutating heater comprises heat carriers which are respectively accommodated in accommodating portions. The heat carriers are made of non-metallic solid materials, and are provided with denitration catalyst layers. The air passage is used for delivering air at least into the other one of the paired accommodating portions.

IPC Classes  ?

• F22B 31/08 - Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
• F23L 15/00 - Heating of air supplied for combustion
• B01D 53/86 - Catalytic processes
• B01D 53/56 - Nitrogen oxides

Abstract

A powdered solid fuel boiler and a dry purification process system (100). The powdered solid fuel boiler (1) comprises: a hearth (11); a regenerative rotating commutating heater (2); a first fume passage (3), wherein an inlet end of the first fume passage (3) is communicated with a top portion of the hearth (11), and an outlet end of the first fume passage (3) is communicated with the regenerative rotating commutating heater (2), so that fume is delivered into one of at least paired accommodating portions (25) of a heat exchanger main body (21) and exchanges heat with a heat carrier (23) accommodated in the accommodating portion (25); an air passage (4), used for delivering air at least into the other one of the paired accommodating portions (25) of the heat exchanger main body (21), so that a heat carrier (23) accommodated in the accommodating portion (25) exchanges heat with air, and the air after heat exchange is supplied into the hearth (11); and a WCFB fume desulfurization device (5), wherein a part of the fume after desulfurization is re-circulated into a second fume passage (101). By means of the powdered solid fuel boiler and the dry purification process system, the fume exhaust temperature is reduced; the efficiency of the boiler, the desulfurization efficiency, and the fume purification rate are improved; and the influence of corrosion is lowered.

IPC Classes  ?

• F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
• B01D 53/50 - Sulfur oxides
• F28D 19/00 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
• F28D 11/02 - Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
• F23L 15/02 - Arrangements of regenerators

Abstract

A gas heat exchanger (100) and a gas heat exchange system (200) having same. The gas heat exchanger (100) comprises a heat exchanger main body (1), a partition member (2), and a central shaft (10), wherein the partition member (2) is disposed in the heat exchanger main body (1) along the central shaft (10), and divides the heat exchanger main body (1) into at least one pair of accommodating portions (11, 12), and each pair of accommodating portions (11, 12) is oppositely and radially arranged relative to the central shaft (10). Heat carriers (111, 121) are respectively accommodated in each pair of accommodating portions (11, 12). The heat carriers (111, 121) are made of non-metallic solid materials, and have small spherical, plate-like, or porous structures.

IPC Classes  ?

• F28D 19/00 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
• F23L 15/00 - Heating of air supplied for combustion

Abstract

A pellet fuel boiler (100) equipped with a regenerative rotating commutating heater. The pellet fuel boiler (100) comprises a hearth (11), a regenerative rotating commutating heater (2), a fume passage (3), and an air passage (4). The regenerative rotating commutating heater (2) comprises a heat exchanger main body (21), a driving device, a partition member (22), and heat carriers (23). An inlet end of the fume passage (3) is communicated with a top portion of the hearth (11), and an outlet end of the fume passage (3) is communicated with the regenerative rotating commutating heater (2), so that fume is delivered into one of at least paired accommodating portions (25) of the heat exchanger main body (21) and exchanges heat with the heat carrier (23) accommodated in the accommodating portion (25). The air passage (4) is used for delivering air at least into the other one of the paired accommodating portions (25) of the heat exchanger main body (21), so that the heat carrier (23) accommodated in the accommodating portion (25) exchanges heat with air, and the air after heat exchange is supplied into the hearth (11). The pellet fuel boiler (100) can recycle sensible heat and latent heat in the fume to the maximum extent, thereby improving thermal efficiency of the boiler.

IPC Classes  ?

• F23C 10/04 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
• F28D 19/00 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
• F28D 11/02 - Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
• F23L 15/02 - Arrangements of regenerators

Abstract

A process system (100) for performing dry desulfurization on fume of a pellet fuel boiler. The system comprises: a pellet fuel boiler (1) defining a hearth (11); a regenerative rotating commutating heater (2); a first fume passage (3), wherein an inlet end of the first fume passage (3) is communicated with a top portion of the hearth (11), and an outlet end of the first fume passage (3) is communicated with the regenerative rotating commutating heater (2), so that fume is delivered into one of at least paired accommodating portions (25) of a heat exchanger main body (21) and exchanges heat with a heat carrier (23) accommodated in the accommodating portion (25); an air passage (4), used for delivering air at least into the other one of the paired accommodating portions (25) of the heat exchanger main body (21), so that a heat carrier (23) accommodated in the accommodating portion (25) exchanges heat with air, and the air after heat exchange is supplied into the hearth (11); and a WCFB fume desulfurization device (5). By means of the pellet fuel boiler and the dry desulfurization process system, the fume exhaust temperature is low, the boiler has high efficiency, the process is optimized, the cost is saved, and the influence of corrosion is lowered.

IPC Classes  ?

• B01D 53/50 - Sulfur oxides
• F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
• F28D 19/00 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
• F28D 11/02 - Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
• F23L 15/02 - Arrangements of regenerators

Abstract

A gas-extractable pulverized coal boiler (100) comprises a boiler main body (1) defining a hearth (11); a regenerative rotating commutating heater (2); a fume passage (3), wherein an inlet end of the fume passage (3) is communicated with the hearth (11) and an outlet end of the fume passage (3) is communicated with the regenerative rotating commutating heater (2), so that fume in the hearth (11) is delivered into one of at least paired accommodating portions (25) and exchanges heat with a heat carrier (23) accommodated in the accommodating portion (25), and multiple superheaters are provided in the fume passage (3); an air passage (4), used for delivering air at least into the other one of the paired accommodating portions (25), so that a heat carrier (23) accommodated in the accommodating portion (25) exchanges heat with air; a high-temperature gas-extracting passage (5), wherein one end of the high-temperature gas-extracting passage (5) is communicated with one end of the fume passage (3) facing the hearth (11), and the other end of the high-temperature gas-extracting passage (5) is communicated with the outlet end of the fume passage (3); and a gas-extracting control unit (51), used for controlling a first amount of fume supplied through the high-temperature gas-extracting passage (5). By means of the pulverized coal boiler, the air preheating temperature is raised and controllable operation is achieved, the thermal efficiency of the boiler is improved, and the problem of operation stability and reliability of a large-scale boiler which carries out power generation with a low volatile content is solved.

IPC Classes  ?

• F23B 80/00 - Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
• F23J 15/08 - Arrangements of devices for treating smoke or fumes of heaters
• F22B 37/06 - Flue or fire tubesAccessories therefor, e.g. fire-tube inserts
• F23C 9/00 - Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber

Abstract

A rotary heating apparatus comprising: a main body (10) defining a hollow cavity (11); a rotary cloth bed (20), disposed in the hollow cavity (11) and comprising a rotary material table (21) and a support column (22); a plurality of upper radiant tube burners (30); and a plurality of lower radiant tube burners (40), wherein fuel gas inlet pipes (31, 41), combustion air inlet pipes (32, 42), and exhaust pipes (33, 43) for discharging waste gas after combustion are respectively formed on a part of the upper radiant tube burners (30) and the lower radiant tube burners (40) located outside the main body (10).

IPC Classes  ?

• C10B 47/00 - Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
• C10B 53/00 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
• C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• F27B 9/00 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity