CN114990336A - Preheating reduction device and preheating reduction method - Google Patents
Preheating reduction device and preheating reduction method Download PDFInfo
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- CN114990336A CN114990336A CN202210659764.6A CN202210659764A CN114990336A CN 114990336 A CN114990336 A CN 114990336A CN 202210659764 A CN202210659764 A CN 202210659764A CN 114990336 A CN114990336 A CN 114990336A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 167
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000002485 combustion reaction Methods 0.000 claims abstract description 55
- 239000003546 flue gas Substances 0.000 claims abstract description 55
- 238000011084 recovery Methods 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 44
- 238000003723 Smelting Methods 0.000 claims abstract description 24
- 239000003034 coal gas Substances 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 239000005997 Calcium carbide Substances 0.000 claims description 8
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 8
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 3
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 3
- 229910000676 Si alloy Inorganic materials 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 3
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 6
- 239000011707 mineral Substances 0.000 abstract description 6
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/08—Apparatus
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Furnace Details (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a preheating reduction device and a preheating reduction method. The preheating reduction device comprises: preheating a reduction furnace; the gas inlet of the submerged arc furnace gas recovery processing device is communicated with the discharge port of the submerged arc furnace, the gas outlet of the submerged arc furnace gas recovery processing device is communicated with the gas inlet of the gas combustion chamber and is used for purifying and then delivering the gas generated by the submerged arc furnace to the gas combustion chamber, and the gas combustion chamber is used for burning the gas to generate hot flue gas which flows reversely into the preheating reduction furnace to preheat and reduce the materials; and the submerged arc furnace is used for further smelting the materials subjected to preheating reduction treatment, and a discharge hole of the preheating reduction furnace is communicated with a feed inlet of the submerged arc furnace through a valve and a material pipe. The invention can realize the pre-reduction of partial minerals, reduce the power consumption of smelting, realize the high-efficiency utilization of the gas of the ore-smelting furnace, save the dehydration equipment of a reducing agent, reduce the operation cost and improve the utilization rate of raw materials.
Description
Technical Field
The invention relates to the technical field of mineral smelting, in particular to a preheating reduction device and a preheating reduction method.
Background
With the development of chemical industry and steel industry, the demand of calcium carbide, yellow phosphorus and iron alloy is increased. In the production of calcium carbide, yellow phosphorus and ferroalloy, the utilization efficiency of coal gas energy is improved, the power consumption of product smelting is reduced, the method is an important way for effectively reducing the production cost of products, and is an important method for improving the enterprise competitiveness.
In the existing production process of calcium carbide, yellow phosphorus and ferroalloy, a reducing agent needs to be dried by a rotary dryer or a vertical dryer for use, other blocky materials and the reducing agent are mixed by batching and then directly added into a submerged arc furnace for smelting, a preheating or pre-reduction process is not needed, and pressure fluctuation in the furnace and high power consumption of product smelting are caused due to unstable characteristics of ore entering the furnace. Meanwhile, the submerged arc furnace gas of the existing enterprises is used for power generation, the highest energy conversion efficiency is only about 42%, and the energy utilization rate is low. At present, the mode that individual enterprises heat materials by using a rotary kiln and lift the materials to a storage bin of the submerged arc furnace by using a charging bucket can realize primary heating of the materials, but the method causes high pulverization rate of the materials, uneven mixing of the materials, inaccurate carbon distribution of the submerged arc furnace caused by burning of a reducing agent, and large-area popularization and use of the method cannot be realized.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a preheating reduction apparatus and a preheating reduction method suitable for raw materials for production of calcium carbide, iron alloy, yellow phosphorus, etc., which can not only realize high-temperature preheating of raw materials and pre-reduction of part of minerals, reduce power consumption in smelting, but also realize efficient utilization of gas in submerged arc furnace, and can save dewatering equipment for reducing agent, reduce operation cost and improve utilization rate of raw materials.
In order to realize the purpose of the invention, the following technical scheme is adopted:
the first aspect of the present invention provides a preheating reduction apparatus, including:
preheating a reduction furnace;
the gas inlet of the submerged arc furnace gas recovery processing device is communicated with the discharge port of the submerged arc furnace, the gas outlet of the submerged arc furnace gas recovery processing device is communicated with the gas inlet of the gas combustion chamber for purifying and then delivering the gas generated by the submerged arc furnace to the gas combustion chamber, and the gas combustion chamber is used for burning the gas to generate hot flue gas which flows reversely into the preheating reduction furnace to preheat and reduce the material;
and the submerged arc furnace is used for further smelting the materials subjected to preheating reduction treatment, and a discharge hole of the preheating reduction furnace is communicated with a feed inlet of the submerged arc furnace through a valve and a material pipe.
The further improvement lies in that the preheating reduction device also comprises a mixture feeding bin and a sealing bin with a control valve, wherein the mixture feeding bin is used for adding materials to the sealing bin with the control valve, and the sealing bin with the control valve is used for controlling the materials to enter the preheating reduction furnace.
The further improvement is that the submerged arc furnace gas recovery processing device comprises a first gas purifier and a gas pressurizing fan, wherein the gas inlet of the first gas purifier is communicated with the gas outlet of the submerged arc furnace, the gas outlet of the first gas purifier is communicated with the gas inlet of the gas pressurizing fan, and the gas outlet of the gas pressurizing fan is communicated with the gas inlet of the gas combustion chamber.
The submerged arc furnace gas recovery processing device is characterized by further comprising a combustion-supporting fan, wherein an exhaust port of the combustion-supporting fan is communicated with the other air inlet of the gas combustion chamber and is used for mixing partial air into the gas combustion chamber.
The further improvement is that the preheating reduction device further comprises a flue gas recovery processing device, an air inlet of the flue gas recovery processing device is communicated with an air outlet of the preheating reduction furnace, an air outlet of the flue gas recovery processing device is communicated with an air inlet of the preheating reduction furnace, and the flue gas recovery processing device is used for purifying flue gas discharged from the preheating reduction furnace and mixing the purified flue gas with hot flue gas to control the temperature and components of the hot flue gas.
The further improvement lies in that the flue gas recovery processing device comprises a second gas purifier, a gas recovery fan and a gas conditioner, wherein an air inlet of the second gas purifier is communicated with an air outlet of the preheating reduction furnace, an air outlet of the second gas purifier is communicated with an air inlet of the gas recovery fan, an air outlet of the gas recovery fan is communicated with an air inlet of the gas conditioner, the other air inlet of the gas conditioner is communicated with an air outlet of the gas combustion chamber, and an air outlet of the gas conditioner is communicated with an air inlet of the preheating reduction furnace.
The second aspect of the present invention provides a preheating reduction method, based on any one of the first aspects, including the steps of:
adding a material to be treated into the preheating reduction furnace;
purifying the coal gas generated by the submerged arc furnace by a submerged arc furnace coal gas recovery processing device and then sending the purified coal gas to a coal gas combustion chamber for combustion;
purifying the flue gas discharged by the preheating reduction furnace by a flue gas recovery processing device, mixing the flue gas with hot flue gas generated by a gas combustion chamber by a gas conditioner, and then sending the mixture into the preheating reduction furnace to preheat and reduce the material;
and (4) sending the material subjected to the preheating reduction treatment to a submerged arc furnace for further smelting.
In a further improvement, the preheating reduction method further comprises the step of mixing part of air into the gas combustion chamber through a combustion fan to be mixed and combusted with the gas.
The further improvement is that the dust concentration of the purified coal gas is within 10mg/Nm3, the carbon monoxide content of the coal gas is between 68 and 82 percent, and the temperature of the coal gas is not higher than 70 ℃.
The further improvement is that the preheating reduction method is used for smelting any one of calcium carbide, yellow phosphorus, manganese-silicon alloy, high-carbon ferrochrome, high-carbon ferromanganese and ferronickel.
The invention has the beneficial effects that:
the preheating reduction device can realize high-temperature preheating of the raw materials, the raw materials are heated to the temperature of 500-900 ℃, the moisture of the materials is removed, the pre-reduction of partial minerals is realized, the power consumption of smelting is reduced, the high-efficiency utilization of the coal gas of the ore smelting furnace can be realized, reducing agent dehydration equipment can be omitted, the operation cost is reduced, and the utilization rate of the raw materials is improved.
Drawings
Fig. 1 is a schematic structural diagram of a preheating reduction apparatus according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "communicating," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a first aspect of the embodiment of the present invention provides a preheating reduction device, which can be used for preheating reduction and smelting of raw materials for production, such as calcium carbide, iron alloy, yellow phosphorus, and the like, and the preheating reduction device includes:
the preheating reduction furnace is used for carrying out preheating reduction treatment on the added mixed materials;
the gas inlet of the submerged arc furnace gas recovery processing device is communicated with the discharge port of the submerged arc furnace, the gas outlet of the submerged arc furnace gas recovery processing device is communicated with the gas inlet of the gas combustion chamber for purifying and then delivering the gas generated by the submerged arc furnace to the gas combustion chamber, and the gas combustion chamber is used for burning the gas to generate hot flue gas which flows reversely into the preheating reduction furnace to preheat and reduce the material;
the submerged arc furnace is used for further smelting the materials subjected to preheating reduction treatment, a discharge hole of the preheating reduction furnace is communicated with a feed inlet of the submerged arc furnace through a valve and a material pipe, and the materials subjected to preheating reduction treatment enter the submerged arc furnace through the valve and the material pipe.
Specifically, hot flue gas after coal gas combustion enters the preheating reduction furnace in a countercurrent manner to exchange heat with the mixed material, and then part of minerals are pre-reduced at the temperature of 700-900 ℃.
Preferably, the preheating reduction furnaces are distributed in a distributed manner.
The preheating reduction device further comprises a mixture feeding bin and a sealing bin with a control valve, wherein the mixture feeding bin is used for adding materials to the sealing bin with the control valve, and the sealing bin with the control valve is used for controlling the materials to enter the preheating reduction furnace.
Specifically, the mixed materials can be added into a sealed bin with a control valve through a mixed material feeding bin, and then added into a preheating reduction furnace through a valve to be preheated and reduced.
The mine heating furnace gas recovery processing device comprises a first gas purifier and a gas pressurizing fan, wherein the gas inlet of the first gas purifier is communicated with the gas outlet of the mine heating furnace, the gas outlet of the first gas purifier is communicated with the gas inlet of the gas pressurizing fan, and the gas outlet of the gas pressurizing fan is communicated with the gas inlet of the gas combustion chamber.
The first gas purifier is arranged to recover and purify gas discharged from an exhaust port of the submerged arc furnace, the gas pressurizing fan is arranged to send the purified gas to the gas combustion chamber, and the gas combustion chamber is arranged to combust the purified gas to generate hot flue gas.
Preferably, the submerged arc furnace gas recovery processing device further comprises a combustion fan, and an exhaust port of the combustion fan is communicated with the other air inlet of the gas combustion chamber and used for mixing part of air into the gas combustion chamber.
It should be noted that, by arranging the combustion fan, a part of air can be blown into the gas combustion chamber to be mixed with the gas, so as to play a role of combustion supporting.
Preferably, the preheating reduction device further comprises a flue gas recovery processing device, an air inlet of the flue gas recovery processing device is communicated with an air outlet of the preheating reduction furnace, an air outlet of the flue gas recovery processing device is communicated with an air inlet of the preheating reduction furnace, and the flue gas recovery processing device is used for purifying flue gas discharged from the preheating reduction furnace and mixing the purified flue gas with hot flue gas to control the temperature and components of the hot flue gas.
It should be noted that, through the flue gas recovery processing device, on the one hand, the flue gas discharged from the preheating reduction furnace can be recycled, and energy is saved, on the other hand, the flue gas discharged from the preheating reduction furnace is purified and then mixed with hot flue gas to control the temperature and components of the hot flue gas, and the pre-reduction atmosphere is ensured by controlling the components of the post-hot flue gas generated by gas combustion, so that the process of preheating reduction is more efficient.
The flue gas recovery processing device comprises a second gas purifier, a gas recovery fan and a gas conditioner, wherein the gas inlet of the second gas purifier is communicated with the gas outlet of the preheating reduction furnace, the gas outlet of the second gas purifier is communicated with the gas inlet of the gas recovery fan, the gas outlet of the gas recovery fan is communicated with the gas inlet of the gas conditioner, the other gas inlet of the gas conditioner is communicated with the gas outlet of the gas combustion chamber, and the gas outlet of the gas conditioner is communicated with the gas inlet of the preheating reduction furnace.
The second gas purifier is arranged to recover and purify the gas exhausted from the exhaust port of the preheating reduction furnace, the gas recovery fan is arranged to send part of the purified gas into the gas conditioner to be mixed with hot flue gas, and the mixture is sent into the preheating reduction furnace.
In addition, the whole device can be automatically operated and produced through an automatic control system.
The working principle of the embodiment is as follows: the material enters a sealed bin with a control valve through a mixture feeding bin and then enters a preheating reduction furnace through a valve, in the preheating reduction furnace, through the processes of temperature rise heating and pre-reduction, the materials after preheating reduction enter the submerged arc furnace for further smelting, the coal gas discharged during smelting of the submerged arc furnace enters a first coal gas purifier through an exhaust port for purification treatment, then enters a coal gas combustion chamber through a coal gas pressurizing fan for combustion to generate hot flue gas, and then enters a coal gas conditioner, meanwhile, a combustion-supporting fan blows a part of air into the gas combustion chamber to be mixed with the gas, so that the combustion-supporting effect is achieved, the flue gas discharged by the preheating reduction furnace is processed by the second gas purifier, enters the gas conditioner through the gas recovery fan, is mixed with the hot flue gas to adjust the temperature and components, and then enters the preheating reduction furnace to preheat and reduce the materials.
The beneficial effects of this embodiment: the preheating reduction device can realize high-temperature preheating of the raw materials, the raw materials are heated to the temperature of 500-900 ℃, the moisture of the materials is removed, the pre-reduction of partial minerals is realized, the smelting power consumption is reduced, the high-efficiency utilization of the gas of the ore-smelting furnace can be realized, the dehydration equipment of a reducing agent can be omitted, the operation cost is reduced, and the utilization rate of the raw materials is improved.
A second aspect of an embodiment of the present invention provides a preheating reduction method, based on any one of the first aspects, of a preheating reduction device, including:
firstly, adding a material to be treated into a preheating reduction furnace;
purifying the coal gas generated by the submerged arc furnace by a submerged arc furnace coal gas recovery processing device and then sending the purified coal gas to a coal gas combustion chamber for combustion;
purifying the flue gas discharged by the preheating reduction furnace by a flue gas recovery processing device, mixing the flue gas with hot flue gas generated by a gas combustion chamber by a gas conditioner, and then sending the mixture into the preheating reduction furnace to preheat and reduce the material;
and (4) sending the material subjected to the preheating reduction treatment to a submerged arc furnace for further smelting.
In this embodiment, the preheating reduction method further includes mixing a part of air into the gas combustion chamber by the combustion fan to perform mixed combustion with the gas.
In the embodiment, the dust concentration of the purified coal gas is within 10mg/Nm3, the carbon monoxide content in the coal gas is between 68 and 82 percent, and the temperature of the coal gas is not higher than 70 ℃.
In this embodiment, the preheating reduction method may be used for smelting any one of calcium carbide, yellow phosphorus, manganese-silicon alloy, high-carbon ferrochrome, high-carbon ferromanganese, and ferronickel.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which shall all fall within the protection of the present invention.
Claims (10)
1. A pre-heating reduction apparatus, comprising:
preheating a reduction furnace;
the gas inlet of the submerged arc furnace gas recovery processing device is communicated with the discharge port of the submerged arc furnace, the gas outlet of the submerged arc furnace gas recovery processing device is communicated with the gas inlet of the gas combustion chamber for purifying and then delivering the gas generated by the submerged arc furnace to the gas combustion chamber, and the gas combustion chamber is used for burning the gas to generate hot flue gas which flows reversely into the preheating reduction furnace to preheat and reduce the material;
and the submerged arc furnace is used for further smelting the materials subjected to preheating reduction treatment, and a discharge hole of the preheating reduction furnace is communicated with a feed inlet of the submerged arc furnace through a valve and a material pipe.
2. The preheating reduction device according to claim 1, further comprising a mixture feeding bin and a sealed bin with a control valve, wherein the mixture feeding bin is used for adding materials to the sealed bin with the control valve, and the sealed bin with the control valve is used for controlling the materials to enter the preheating reduction furnace.
3. The preheating reduction device according to claim 1, wherein the submerged arc furnace gas recovery processing device comprises a first gas purifier and a gas pressurizing fan, an air inlet of the first gas purifier is communicated with an air outlet of the submerged arc furnace, an air outlet of the first gas purifier is communicated with an air inlet of the gas pressurizing fan, and an air outlet of the gas pressurizing fan is communicated with an air inlet of the gas combustion chamber.
4. The preheating reduction device according to claim 3, wherein the submerged arc furnace gas recovery processing device further comprises a combustion fan, and an exhaust port of the combustion fan is communicated with another air inlet of the gas combustion chamber for mixing part of air into the gas combustion chamber.
5. The preheating reduction device according to claim 1, further comprising a flue gas recovery processing device, wherein an air inlet of the flue gas recovery processing device is communicated with an air outlet of the preheating reduction furnace, an air outlet of the flue gas recovery processing device is communicated with an air inlet of the preheating reduction furnace, and the flue gas recovery processing device is used for purifying flue gas discharged from the preheating reduction furnace and mixing the flue gas with hot flue gas for controlling the temperature and the composition of the hot flue gas.
6. The preheating reduction device according to claim 5, wherein the flue gas recovery processing device comprises a second gas purifier, a gas recovery fan and a gas conditioner, an air inlet of the second gas purifier is communicated with an air outlet of the preheating reduction furnace, an air outlet of the second gas purifier is communicated with an air inlet of the gas recovery fan, an air outlet of the gas recovery fan is communicated with an air inlet of the gas conditioner, the other air inlet of the gas conditioner is communicated with an air outlet of the gas combustion chamber, and an air outlet of the gas conditioner is communicated with an air inlet of the preheating reduction furnace.
7. A pre-heating reduction method, based on any one of claims 1 to 6, comprising the steps of:
adding a material to be treated into the preheating reduction furnace;
purifying the coal gas generated by the submerged arc furnace by a submerged arc furnace coal gas recovery processing device and then sending the purified coal gas to a coal gas combustion chamber for combustion;
purifying the flue gas discharged by the preheating reduction furnace by a flue gas recovery processing device, mixing the flue gas with hot flue gas generated by a gas combustion chamber by a gas conditioner, and then sending the mixture into the preheating reduction furnace to preheat and reduce the material;
and (4) sending the material subjected to the preheating reduction treatment to a submerged arc furnace for further smelting.
8. The preheating reduction method according to claim 7, further comprising mixing a part of air into the gas combustion chamber by a combustion fan to be mixed with the gas for combustion.
9. The preheating reduction method according to claim 7, wherein the dust concentration of the purified gas is within 10mg/Nm3, the carbon monoxide content of the gas is between 68% and 82%, and the temperature of the gas is not higher than 70 ℃.
10. The preheating reduction method according to claim 7, wherein the preheating reduction method is used for smelting any one of calcium carbide, yellow phosphorus, manganese-silicon alloy, high-carbon ferrochrome, high-carbon ferromanganese and ferronickel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718025A (en) * | 2023-06-12 | 2023-09-08 | 青岛金能环科技有限责任公司 | Method for producing alloy by prereducing high-temperature coal gas of submerged arc furnace |
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| CN116718025A (en) * | 2023-06-12 | 2023-09-08 | 青岛金能环科技有限责任公司 | Method for producing alloy by prereducing high-temperature coal gas of submerged arc furnace |
| CN116718025B (en) * | 2023-06-12 | 2024-08-16 | 青岛金能环科技有限责任公司 | Method for producing alloy by prereducing high-temperature coal gas of submerged arc furnace |
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| CN114990336B (en) | 2023-11-14 |
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