CN215887084U - Production system for producing manganese-rich slag by coal injection method - Google Patents
Production system for producing manganese-rich slag by coal injection method Download PDFInfo
- Publication number
- CN215887084U CN215887084U CN202122390465.0U CN202122390465U CN215887084U CN 215887084 U CN215887084 U CN 215887084U CN 202122390465 U CN202122390465 U CN 202122390465U CN 215887084 U CN215887084 U CN 215887084U
- Authority
- CN
- China
- Prior art keywords
- coal
- pipe
- pulverized coal
- rich slag
- manganese
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a production system for producing manganese-rich slag by a coal injection method, and belongs to the technical field of metallurgical processes. The production system for producing the manganese-rich slag by the coal injection method comprises a blast furnace, a coal injection device, a coal powder preparation device and a flue gas treatment device. The furnace belly of the blast furnace is provided with a plurality of hot air branch pipes, and the furnace top is provided with a coal gas extraction pipe. The coal injection device comprises a coal powder conveying mechanism and a plurality of coal injection guns, and the material outlet ends of the coal injection guns are arranged in the hot air branch pipes. The coal powder preparation device comprises a ball mill and a coal powder bin. The flue gas treatment device comprises a hot blast stove, a fuel gas inlet end of the hot blast stove is connected with the coal gas extraction pipe, and a tail gas outlet end of the hot blast stove is introduced into the ball mill. The coal gas generated in the process of smelting the manganese-rich slag in the blast furnace is firstly used as fuel gas of the hot blast stove, and tail gas of the hot blast stove is introduced into the ball mill to dry raw coal milled in the ball mill, so that the particle size and the humidity of pulverized coal obtained after milling in the ball mill are ensured, and the risk of blockage of a pulverized coal conveying pipeline and a coal injection gun is reduced.
Description
Technical Field
The utility model belongs to the technical field of metallurgical processes, and particularly relates to a production system for producing manganese-rich slag by a coal injection method.
Background
Manganese plays an important role in national economic development, manganese ores in China mostly belong to poor ores, and common manganese ore dressing methods are mechanical dressing, pyrogenic process enrichment, chemical ore dressing and the like. The pyrogenic process enrichment method of manganese ore is a separation method for treating refractory poor manganese ore with high phosphorus and high iron, and is also called as manganese-rich slag method. The high-temperature separation method is a high-temperature separation method which utilizes the different reduction temperatures of manganese, phosphorus and iron and controls the temperatures in a blast furnace or an electric furnace to carry out selective separation. The method has simple process and stable production, and can effectively separate iron and phosphorus in the ore to obtain manganese-rich, low-iron and low-phosphorus manganese-rich slag.
The production of manganese-rich slag by a blast furnace is one of the main production modes of manganese-rich slag, and in the prior art, for example, the Chinese patent with the patent number of 201911046903.2 discloses a manganese-rich slag preparation device which comprises a side-blowing submerged combustion smelting furnace, a side-blowing spray gun and a powder-spraying recarburizing spray gun, wherein the side-blowing spray gun and the powder-spraying recarburizing spray gun are arranged on the side wall of the side-blowing submerged combustion smelting furnace, and the powder-spraying recarburizing spray gun is used for spraying carbon powder to a liquid iron layer. And fuel, oxygen-enriched air, reducing agent and the like are injected into the submerged combustion smelting furnace through the injection normal side-blown injection method, so that the manganese ore is melted and manganese-enriched slag is generated. Research shows that the coal powder is injected into the manganese slag-rich blast furnace by adopting an injection method, so that part of coke can be replaced, the cost is reduced, and the road condition of the blast furnace is improved. However, since the water content of the raw coal is high, the pulverized coal is easy to agglomerate in the process of pulverizing and injecting the raw coal, so that the granularity and the humidity of the pulverized coal are difficult to meet the injection requirement, and the pulverized coal with high water content is easy to adhere to the pipe wall of the coal conveying pipe, so that the coal conveying pipe and the coal injection gun are blocked.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides a production system for producing manganese-rich slag by a coal injection method, which aims to solve the technical problems that the coal powder property is difficult to meet the process requirement and the coal conveying pipeline is easy to block due to the large water content of raw coal in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a coal injection method production system for producing manganese-rich slag comprises:
the blast furnace is provided with a plurality of hot air branch pipes at the furnace bosh; a coal gas extraction pipe is arranged at the furnace top;
the coal injection device comprises a coal powder conveying mechanism and a plurality of coal injection guns, and the material outlet ends of the coal injection guns are arranged in the hot air branch pipes;
the pulverized coal preparation device comprises a ball mill and a pulverized coal bin, and the pulverized coal bin is connected to the feeding end of the pulverized coal conveying mechanism;
the flue gas treatment device comprises a hot blast stove, a fuel gas inlet end of the hot blast stove is connected with the coal gas extraction pipe, a hot air outlet end of the hot blast stove is connected with the hot air branch pipe, and a tail gas outlet end of the hot blast stove is introduced into the ball mill.
As a further description of the above technical solution: the material outlet end of the coal injection gun is coaxial with the hot air branch pipe.
As a further description of the above technical solution: the pulverized coal conveying mechanism comprises an injection tank connected with the pulverized coal bin through an inlet, the outlet of the injection tank is connected with a coal conveying pipe, a pulverized coal splitter is arranged on the coal conveying pipe, and a gas-phase inlet of the injection tank is connected with a nitrogen feeding pipe fitting.
As a further description of the above technical solution: the pulverized coal preparation device further comprises a pulverized coal separator connected to the discharge end of the ball mill, the pulverized coal discharge end of the pulverized coal separator is connected to the feed end of the pulverized coal bin, and the gas-phase discharge end is connected with an induced draft fan.
As a further description of the above technical solution: and a second dust remover is arranged at the outlet end of the induced draft fan.
As a further description of the above technical solution: and a gas phase outlet end of the second dust remover is provided with a gas phase circulating pipe and a tail gas discharge pipe, the gas phase circulating pipe is connected with a tail gas outlet end of the hot blast stove, and the tail gas discharge pipe is emptied.
As a further description of the above technical solution: and a desulfurization mechanism is arranged on the tail gas discharge pipe.
As a further description of the above technical solution: the pulverized coal preparation device further comprises a raw coal mixing mechanism, the raw coal mixing mechanism comprises a hoister, a raw coal bin and a coal feeder which are sequentially arranged, and the outlet end of the coal feeder is connected with the inlet end of the ball mill.
As a further description of the above technical solution: the raw coal mixing mechanism further comprises a bituminous coal feeding component and an anthracite coal feeding component which are arranged at the material inlet end of the hoister.
As a further description of the above technical solution: the top of blast furnace is provided with the feeding distributor, the entry end of feeding distributor is provided with the feeding lifting machine, the entry end of feeding lifting machine is provided with the mixing hopper, the top of mixing hopper is provided with poor manganese ore feeding subassembly, coke feeding subassembly and carborundum sediment feeding subassembly.
The utility model has the following beneficial effects: the method is characterized in that a coal injection device, a coal powder preparation device and a flue gas treatment device are arranged, coal gas generated in the process of smelting manganese-rich slag in the blast furnace is firstly used as fuel gas of the hot blast furnace, and hot air generated by the hot blast furnace is used as air supply of the blast furnace. The tail gas of the hot blast stove is introduced into the ball mill to dry the raw coal milled in the ball mill, so that the particle size and the humidity of the pulverized coal obtained after milling of the ball mill are guaranteed, the risk that the pulverized coal with high water content blocks a pulverized coal conveying pipeline and the coal injection gun is reduced, meanwhile, the waste heat utilization efficiency of the discharged tail gas is improved, and the cost is reduced. The pulverized coal with proper particle size and low humidity prepared by the pulverized coal preparation device passes through the coal injection device and is introduced into the blast furnace from the hot air branch pipe, the pulverized coal is rapidly oxidized and released heat under high-temperature and low-oxygen environments and is used as a reducing agent and a heat source medium to replace part of coke, so that the addition amount of initial coke is reduced. Meanwhile, the injected coal powder emits more hydrogen than coke in the gasification process, so that the reduction capability and the penetration diffusion capability of coal gas are improved, and the reduction reaction speed of manganese ore is improved. The injected coal powder is gasified and combusted in front of the tuyere to maintain the smelting power of the blast furnace, and conditions are created for using high air temperature for smelting manganese-rich slag in the blast furnace.
Drawings
FIG. 1 is a schematic view of a flow of a production system for producing manganese-rich slag by a coal injection method in one embodiment;
FIG. 2 is a schematic view showing the structure and equipment flow of a blast furnace according to an embodiment;
FIG. 3 is a schematic view of an embodiment of an apparatus for injecting coal;
in the figure: the production system 10 for producing manganese-rich slag by a coal injection method, a blast furnace 100, a hot air branch pipe 110, a coal gas production pipe 120, a feeding distributor 130, a coal injection device 200, a coal injection gun 210, an injection tank 222, a coal conveying pipe 223, a coal powder splitter 224, a nitrogen feeding pipe 225, a ball mill 310, a coal powder bin 320, a coal powder separator 330, an induced draft fan 331, a second dust remover 332, a gas phase circulating pipe 333, a tail gas discharging pipe 334, a desulfurization mechanism 335, an oxygen reduction and gas supplement pipe 336, a lifting machine 341, a raw coal bin 342, a coal feeder 343, a bituminous coal feeding component 344, an anthracite feeding component 345, a hot blast furnace 410, a first boiler 420, a first dust remover 430, a second boiler 440, a feeding lifting machine 500, a mixing hopper 510, a manganese ore lean silo 511, a coke silo 512 and a silicon carbide slag silo 513.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in an embodiment of the present invention, a system 10 for producing manganese-rich slag by a coal injection method includes a blast furnace 100, a coal injection device 200, a pulverized coal preparation device, and a flue gas treatment device.
The lean manganese ore and the coke are subjected to a reduction reaction in the blast furnace 100 to generate iron liquid and manganese-rich slag. The coal injection device 200 is used for injecting coal powder into the blast furnace 100, the coal powder preparation device is used for preparing coal powder, and the flue gas treatment device is used for treating high-temperature coal gas generated in the process of smelting manganese-rich slag in the blast furnace 100 and recovering sensible heat and chemical heat energy in the high-temperature coal gas.
Specifically, a plurality of hot air branch pipes 110 are arranged at the furnace belly of the blast furnace 100, a gas extraction pipe 120 is arranged at the furnace top, hot air is introduced into the blast furnace through the hot air branch pipes 110, and high-temperature gas is extracted from the furnace top of the blast furnace 100 through the gas extraction pipe 120.
The coal injection device 200 includes a coal powder conveying mechanism and a plurality of coal injection guns 210, and the material outlet ends of the coal injection guns 210 are disposed in the hot air branch pipes 110. During the smelting of the manganese-rich slag, hot air is introduced, and simultaneously, coal powder is blown into the blast furnace 100 from the hot air branch pipe 110 to replace part of coke, so that the production cost is reduced.
The pulverized coal preparation device comprises a ball mill 310 and a pulverized coal bin 320, wherein the pulverized coal bin 320 is connected to the feeding end of the pulverized coal conveying mechanism. Raw coal is pulverized by the ball mill 310 and stored in the pulverized coal bunker 320.
The flue gas treatment device comprises a hot blast stove 410, a fuel gas inlet end of the hot blast stove 410 is connected with the coal gas extraction pipe 120, a hot air outlet end is connected with the hot air branch pipe 110, and a tail gas outlet end is introduced into the ball mill 310. In the process of smelting the manganese-rich slag, high-temperature coal gas extracted from the top of the blast furnace 100 is used as fuel gas of the hot blast stove 410, and the fuel gas is combusted to release heat energy and heat air. The heated air is introduced into the blast furnace 100 as hot air of the blast furnace 100. After the high-temperature coal gas is fully combusted in the hot blast stove 410, the generated high-temperature tail gas is introduced into the ball mill 310 to dry the raw coal and the pulverized coal, so that the particle size and the moisture content of the coal can meet the process requirements, and the probability that the coal powder conveying pipeline and the coal injection gun 210 are blocked by the coal powder with higher moisture content is reduced.
Further, in order to improve coal injection efficiency and improve heat distribution balance of the blast furnace 100, the material outlet end of the coal injection lance 210 is coaxially disposed with the hot air branch pipe 110. For example, the specification is 300m3The 10 hot air branch pipes 110 are uniformly distributed at the furnace bosh of the blast furnace 100, the coal injection guns 210 are arranged in the 10 hot air branch pipes 110, and coal powder is injected from the periphery of the blast furnace 100 to the furnace bosh of the blast furnace 100, so that the heat distribution of the blast furnace 100 is balanced.
With continued reference to fig. 3, in one embodiment, the pulverized coal conveying mechanism may inject pulverized coal into the blast furnace 100 by dilute phase conveying. In order to improve the coal injection efficiency and reduce the safety risk, the pulverized coal conveying mechanism adopts a concentrated phase conveying mode to inject pulverized coal into the blast furnace 100. For example, the pulverized coal conveying mechanism comprises an injection tank 222, a coal conveying pipe 223 is connected to an outlet of the injection tank 222, a pulverized coal splitter 224 is arranged on the coal conveying pipe 223, and a nitrogen gas feeding pipe 225 is connected to a gas phase inlet of the injection tank 222. The pulverized coal stored in the pulverized coal bunker 320 enters the injection tank 222, and the pulverized coal in the injection tank 222 is pressed into the coal conveying pipe 223 by using high-pressure nitrogen, and is delivered to the coal injection gun 210 after being divided at the pulverized coal splitter 224. The concentrated phase conveying mode is adopted to convey the pulverized coal, so that the pulverized coal conveying efficiency can be improved, the cost is reduced, the concentration of the pulverized coal in the conveying pipe is high, and the safety risk is favorably reduced.
In another embodiment, in order to separate and settle the pulverized coal quickly and reduce dust pollution, the pulverized coal preparation apparatus further includes a pulverized coal separator 330 connected to the discharge end of the ball mill 310, the pulverized coal discharge end of the pulverized coal separator 330 is connected to the feed end of the pulverized coal bunker 320, and the gas phase discharge end is connected to an induced draft fan 331. Raw coal enters the coal powder separator 330 after being ground by the ball mill 310, the raw coal is rapidly separated and settled, coal powder falls into the coal powder bin 320, and gas phase is discharged through an outlet of the induced draft fan 331.
Further, for reducing the particle concentration in the discharged tail gas and preventing dust pollution, the outlet end of the induced draft fan 331 is provided with a second dust collector 332. The second dust collector 332 may be one of a cyclone dust collector, a wet dust collector, a bag dust collector, and an electric collector.
Further, a gas phase outlet end of the second dust remover 332 is provided with a gas phase circulating pipe 333 and a tail gas discharge pipe 334, the gas phase circulating pipe 333 is connected with the tail gas outlet end of the hot blast stove 410, and the tail gas discharge pipe 334 is emptied. And the tail gas subjected to dust reduction by the second dust remover 332 is partially discharged, and partially circulates as low-temperature gas, and is mixed with the tail gas of the hot blast stove 410, so that the temperature of the tail gas of the hot blast stove 410 is adjusted, the cyclic utilization of a gas phase is realized, and the comprehensive discharge amount of the tail gas is reduced.
Further, a desulfurization mechanism 335 is arranged on the tail gas discharge pipe 334 to further reduce the sulfur content and the dust content in the discharged tail gas, and improve the environmental benefit.
In a preferred embodiment, the pulverized coal preparation apparatus further includes a raw coal blending mechanism, the raw coal blending mechanism includes a lifting machine 341, a raw coal bunker 342, and a coal feeder 343, which are sequentially disposed, and an outlet end of the coal feeder 343 is connected to an inlet end of the ball mill 310, so that raw coal is fed into the ball mill 310 through the coal feeder 343 to be pulverized.
Further, the raw coal blending mechanism further includes a bituminous coal feeding component 344 and an anthracite coal feeding component 345 disposed at the material inlet end of the elevator 341. The bituminous coal and the anthracite coal are respectively conveyed to the elevator 341 through the bituminous coal feeding component 344 and the anthracite coal feeding component 345, so that the powder obtained by the ball mill 310 has both bituminous coal components and anthracite coal components. The bituminous coal has higher volatile components, loose structure, porous combustion process, better combustion performance than anthracite, but lower replacement ratio. The anthracite has high carbon content and compact structure, the combustion process is a laminar combustion process from outside to inside, the combustion rate is lower, but the replacement ratio is higher than that of bituminous coal. Therefore, the soft coal and the anthracite are mixed and injected into the blast furnace 100, so that the combustion can be mutually promoted, and the coal coke replacement ratio of the blast furnace is improved. In addition, the reasonable coal blending greatly reduces the explosiveness of the mixed coal powder, improves the combustion performance, reduces the unburned coal powder and is beneficial to the smooth operation of the blast furnace.
In another preferred embodiment, in order to further reduce the coke consumption and the production cost, the top of the blast furnace 100 is provided with a feeding distributor 130, the inlet end of the feeding distributor 130 is provided with a feeding elevator 500, the inlet end of the feeding elevator 500 is provided with a mixing hopper 510, and a lean manganese ore bin 511, a coke bin 512 and a silicon carbide slag bin 513 are arranged above the mixing hopper 510. Raw materials of manganese-poor ore, coke and silicon carbide slag (waste slag generated in the process of producing silicon carbide) respectively fall into the mixing hopper 510 from the manganese-poor ore bin 511, the coke bin 512 and the silicon carbide slag bin 513, are uniformly mixed, are lifted to the feeding distributor 130 by the feeding lifter 500, and are added into the blast furnace 100 for smelting.
In the embodiment, the silicon carbide slag is mixed in the manganese-rich slag raw material, and the silicon carbide slag is used for replacing part of coke, so that the resource recycling of the silicon carbide slag is realized, and in the smelting process, the silicon carbide slag is preheated by the heat of the blast furnace, the heat conduction of the raw material is accelerated, and the separation of manganese, iron and phosphorus in the manganese ore is accelerated. When a certain temperature is reached, the silicon carbide slag is promoted to release heat, the heat energy improves the coke load, the blanking speed is accelerated, and the yield is improved.
In one embodiment, the flue gas treatment device further includes a first boiler 420 and a first dust remover 430, the first boiler 420 is connected to the gas extraction pipe 120, and a gas-phase inlet end of the first dust remover 430 is connected to a tail gas discharge end of the first boiler 420. The high-temperature gas extracted from the top of the blast furnace 100 first passes through the first boiler 420 to recover sensible heat in the high-temperature gas, then passes through the first dust collector 430 to remove dust, so as to obtain clean gas, and then is sent to the hot blast stove 410 as a fuel to recover chemical heat energy.
Further, a second boiler 440 is arranged at the tail gas discharge end of the hot blast stove 410 to further recover the sensible heat carried in the generated tail gas after the gas is combusted.
Further, the gas-phase outlet end of the second dust collector 332 is further provided with an oxygen-reducing and supplementing pipe 336, and the oxygen-reducing and supplementing pipe 336 is connected to the air inlet end of the hot blast stove 410 and is used for recovering part of the low-oxygen exhaust tail gas and adjusting the oxygen content of the hot air fed into the blast furnace 100 through the hot blast stove 410.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (10)
1. A coal injection method production system for producing manganese-rich slag is characterized by comprising the following steps:
the blast furnace is provided with a plurality of hot air branch pipes at the furnace bosh; a coal gas extraction pipe is arranged at the furnace top;
the coal injection device comprises a coal powder conveying mechanism and a plurality of coal injection guns, and the material outlet ends of the coal injection guns are arranged in the hot air branch pipes;
the pulverized coal preparation device comprises a ball mill and a pulverized coal bin, and the pulverized coal bin is connected to the feeding end of the pulverized coal conveying mechanism;
the flue gas treatment device comprises a hot blast stove, a fuel gas inlet end of the hot blast stove is connected with the coal gas extraction pipe, a hot air outlet end of the hot blast stove is connected with the hot air branch pipe, and a tail gas outlet end of the hot blast stove is introduced into the ball mill.
2. The production system for producing manganese-rich slag by the coal injection method according to claim 1, wherein a material outlet end of the coal injection lance is arranged coaxially with the hot blast branch pipe.
3. The production system for producing manganese-rich slag by the coal injection method according to claim 1, wherein the pulverized coal conveying mechanism comprises an injection tank with an inlet connected with the pulverized coal bin, an outlet of the injection tank is connected with a coal conveying pipe, a pulverized coal splitter is arranged on the coal conveying pipe, and a gas phase inlet of the injection tank is connected with a nitrogen feeding pipe fitting.
4. The production system for producing manganese-rich slag by the coal injection method according to claim 1, wherein the pulverized coal preparation device further comprises a pulverized coal separator connected to the discharge end of the ball mill, the pulverized coal discharge end of the pulverized coal separator is connected to the feed end of the pulverized coal bunker, and the gas phase discharge end is connected to an induced draft fan.
5. The production system for producing manganese-rich slag by the coal injection method according to claim 4, wherein a second dust remover is arranged at the outlet end of the induced draft fan.
6. The system for producing manganese-rich slag according to claim 5, wherein the gas phase outlet end of said second dust collector is provided with a gas phase circulation pipe, an air supplement pipe and a tail gas discharge pipe, said gas phase circulation pipe is connected to the tail gas outlet end of said hot blast stove, said air supplement pipe is connected to the cold air inlet end of said hot blast stove, and said tail gas discharge pipe is vented.
7. The system for producing manganese-rich slag by the coal injection method according to claim 6, wherein a desulfurization mechanism is disposed on the tail gas discharge pipe.
8. The production system for producing manganese-rich slag according to any one of claims 4 to 7, wherein the pulverized coal preparation device further comprises a raw coal mixing mechanism, the raw coal mixing mechanism comprises a hoister, a raw coal bunker and a coal feeder which are arranged in sequence, and an outlet end of the coal feeder is connected with an inlet end of the ball mill.
9. The system of claim 8, wherein the raw coal blending mechanism further comprises a bituminous coal feeding assembly and an anthracite coal feeding assembly disposed at the material inlet end of the elevator.
10. The production system for producing manganese-rich slag by the coal injection method according to claim 1, wherein a feeding distributor is arranged at the top of the blast furnace, a feeding elevator is arranged at the inlet end of the feeding distributor, a mixing hopper is arranged at the inlet end of the feeding elevator, and a manganese-poor ore feeding assembly, a coke feeding assembly and a silicon carbide slag feeding assembly are arranged above the mixing hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390465.0U CN215887084U (en) | 2021-09-29 | 2021-09-29 | Production system for producing manganese-rich slag by coal injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390465.0U CN215887084U (en) | 2021-09-29 | 2021-09-29 | Production system for producing manganese-rich slag by coal injection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215887084U true CN215887084U (en) | 2022-02-22 |
Family
ID=80348565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122390465.0U Active CN215887084U (en) | 2021-09-29 | 2021-09-29 | Production system for producing manganese-rich slag by coal injection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215887084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116083673A (en) * | 2023-01-29 | 2023-05-09 | 上海开鸿环保科技有限公司 | Synchronous desulfurization and denitrification system for cascade utilization of flue gas of blast furnace hot blast stove |
-
2021
- 2021-09-29 CN CN202122390465.0U patent/CN215887084U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116083673A (en) * | 2023-01-29 | 2023-05-09 | 上海开鸿环保科技有限公司 | Synchronous desulfurization and denitrification system for cascade utilization of flue gas of blast furnace hot blast stove |
| CN116083673B (en) * | 2023-01-29 | 2024-05-03 | 上海开鸿环保科技有限公司 | Synchronous desulfurization and denitrification system for cascade utilization of flue gas of blast furnace hot blast stove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104131122B (en) | A kind of iron-smelting process based on winding-up coal gas of high temperature | |
| WO2021035815A1 (en) | Electric energy full-hydrogen flash reduction direct steelmaking system and process | |
| CN112899427B (en) | Hydrogen shaft furnace iron making system and method using electric energy for heating | |
| CN101386897B (en) | Iron-smelting technology of SDRF furnace | |
| CN103011090B (en) | Method for producing sulfur by using pyrolysis-reducing united technique | |
| WO2021035821A1 (en) | Cyclone flashing-speed reduction direct steelmaking system and process | |
| CN110669942A (en) | Method for treating zinc-containing dust in steel plant | |
| CN215887084U (en) | Production system for producing manganese-rich slag by coal injection method | |
| CN105776218A (en) | Calcium carbide preparation system and method | |
| CN115615188A (en) | Oxygen-enriched double-chamber molten pool smelting side-blown furnace and method for extracting iron and quenching molten steel slag | |
| CN104745806A (en) | Refractory low-grade iron ore shaft furnace semi-coke added magnetizing roast process | |
| CN114752718A (en) | Ultra-low carbon consumption blast furnace smelting process and blast furnace smelting system | |
| CN113265533B (en) | Roasting system and method for efficiently utilizing biomass | |
| WO2012086961A4 (en) | Method for manufacturing partially carbonized coal briquettes, apparatus for manufacturing partially carbonized coal briquettes, and apparatus for manufacturing molten iron | |
| CN109385521B (en) | Production process for lead-antimony mixed ore oxygen-enriched molten pool low-temperature oxidation smelting | |
| CN204039332U (en) | The metallurgical restoring system of coal gas circulation coal wholegrain radial sector pyrolysis coupling | |
| CN115820954A (en) | Blast furnace blowing CO 2 Biomass charcoal tempering co-production carbon emission reduction system and application process | |
| CN110343878A (en) | A kind of energy-saving and environment-friendly dilval production method | |
| CN106191431B (en) | A kind of reduction reaction system and method for the aqueous pelletizing of lateritic nickel ore | |
| KR101607254B1 (en) | Combiner Ironmaking facilities | |
| CN114216124A (en) | Waste circuit board recycling system and process | |
| KR101607253B1 (en) | Combiner ironmaking facilities | |
| CN113528806A (en) | Direct reduction treatment process for zinc-containing dust and sludge in iron and steel plant by using high-efficiency rotary hearth furnace | |
| CN206204385U (en) | A kind of reduction reaction system of the aqueous pelletizing of lateritic nickel ore | |
| CN210367760U (en) | Device for producing molten iron by adopting acidic carbon-containing metallized pellets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |