CN114990336B - Preheating reduction device and preheating reduction method - Google Patents
Preheating reduction device and preheating reduction method Download PDFInfo
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- CN114990336B CN114990336B CN202210659764.6A CN202210659764A CN114990336B CN 114990336 B CN114990336 B CN 114990336B CN 202210659764 A CN202210659764 A CN 202210659764A CN 114990336 B CN114990336 B CN 114990336B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 196
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000003546 flue gas Substances 0.000 claims abstract description 55
- 238000002485 combustion reaction Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 43
- 238000011084 recovery Methods 0.000 claims abstract description 38
- 238000003723 Smelting Methods 0.000 claims abstract description 32
- 239000003034 coal gas Substances 0.000 claims abstract description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 8
- 239000011707 mineral Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 11
- 239000005997 Calcium carbide Substances 0.000 claims description 8
- 238000004064 recycling Methods 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
- 238000012545 processing Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 4
- 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
- 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 12
- 239000003638 chemical reducing agent Substances 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000018044 dehydration Effects 0.000 abstract description 4
- 238000006297 dehydration reaction Methods 0.000 abstract description 4
- 229910001021 Ferroalloy Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
Abstract
The present 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 treatment device is communicated with the discharge port of the submerged arc furnace, the exhaust port of the submerged arc furnace gas recovery treatment device is communicated with the gas inlet of the gas combustion chamber and is used for purifying gas generated by the submerged arc furnace and then sending the purified gas to the gas combustion chamber, and the gas combustion chamber is used for combusting gas to generate hot flue gas which flows back into the preheating reduction furnace to preheat and reduce materials; the ore smelting furnace is used for further smelting the preheated and reduced materials, and a discharge port of the preheating and reducing furnace is communicated with a feed port of the ore smelting furnace through a valve and a material pipe. The invention can realize the pre-reduction of partial minerals, reduce the electricity consumption of smelting, realize the efficient utilization of the coal gas of the submerged arc furnace, omit the dehydration equipment of the reducing agent, reduce the running 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 method improves the utilization efficiency of gas energy, reduces the power consumption of smelting products, is an important way for effectively reducing the production cost of the products, and is also an important method for improving the competitiveness of enterprises.
In the existing production process of calcium carbide, yellow phosphorus and ferroalloy, the reducing agent is required to be dried by a rotary dryer or a vertical dryer, other blocky materials and the reducing agent are directly added into an ore smelting furnace for smelting after being mixed by ingredients, a preheating or prereducing process is not needed, and the pressure fluctuation in the furnace and the high power consumption for smelting products are caused due to unstable mineral characteristics in the furnace. Meanwhile, the submerged arc furnace gas of the existing enterprises is used for generating electricity, the highest energy conversion efficiency is only about 42%, and the energy utilization rate is low. At present, individual enterprises can primarily heat materials by utilizing rotary kilns and lifting the materials to a material bin of an ore-smelting furnace by utilizing a charging bucket, but the method has the defects of high pulverization rate of the materials, uneven material mixing, inaccurate carbon distribution of the ore-smelting furnace caused by burning of a reducing agent and incapability of being popularized and used in a large area.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the preheating reduction device and the preheating reduction method suitable for raw materials for production of calcium carbide, ferroalloy, yellow phosphorus and the like, which can realize high-temperature preheating of the raw materials, prereduction of partial minerals, reduce smelting electricity consumption, realize efficient utilization of submerged arc furnace gas, omit reducing agent dehydration equipment, reduce operation cost and improve the utilization rate of the raw materials.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the first aspect of the present invention proposes a preheating reduction apparatus comprising:
preheating a reduction furnace;
the gas inlet of the submerged arc furnace gas recovery treatment device is communicated with the discharge port of the submerged arc furnace, the gas outlet of the submerged arc furnace gas recovery treatment device is communicated with the gas inlet of a gas combustion chamber and is used for purifying gas generated by the submerged arc furnace and then sending the gas to the gas combustion chamber, and the gas combustion chamber is used for combusting the gas to generate hot flue gas which reversely flows into the preheating reduction furnace to preheat and reduce materials;
the ore smelting furnace is used for further smelting the preheated and reduced materials, and a discharge port of the preheating and reducing furnace is communicated with a feed port of the ore smelting furnace through a valve and a material pipe.
The preheating reduction device is further improved in that 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 feeding 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 submerged arc furnace gas recycling device is further improved in that the submerged arc furnace gas recycling 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 recycling device is further improved in that the submerged arc furnace gas recycling device further comprises a combustion-supporting fan, and an exhaust port of the combustion-supporting 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.
The preheating reduction device is further improved in that the preheating reduction device further comprises a flue gas recovery treatment device, an air inlet of the flue gas recovery treatment device is communicated with an air outlet of the preheating reduction furnace, an air outlet of the flue gas recovery treatment device is communicated with an air inlet of the preheating reduction furnace, and the flue gas recovery treatment device is used for purifying flue gas exhausted by the preheating reduction furnace and mixing the flue gas with hot flue gas to control the temperature and the components of the hot flue gas.
The flue gas recovery treatment 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.
A second aspect of the present invention proposes a preheating reduction method, based on any one of the first aspects, comprising the steps of:
adding a material to be treated into a preheating reduction furnace;
purifying coal gas generated by the submerged arc furnace through a submerged arc furnace coal gas recovery processing device, and then delivering the purified coal gas to a coal gas combustion chamber for combustion;
purifying the flue gas discharged from the preheating reduction furnace through a flue gas recovery treatment device, mixing the flue gas with hot flue gas generated by a gas combustion chamber, and sending the mixture to the preheating reduction furnace to perform preheating reduction treatment on materials;
and sending the material subjected to preheating reduction treatment to an ore smelting furnace for further smelting.
The preheating reduction method is further improved in that the preheating reduction method further comprises the step of mixing part of air into a gas combustion chamber through a combustion-supporting fan to be mixed with gas for combustion.
The further improvement is that 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 degrees.
The preheating reduction method is further improved in 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 raw materials, the raw materials are heated to 500-900 ℃, water in the raw materials is removed, the prereduction of partial minerals is realized, the smelting electricity consumption is reduced, the efficient utilization of the submerged arc furnace gas can be realized, reducing agent dehydration equipment can be omitted, the running cost is reduced, and the utilization rate of the raw materials is improved.
Drawings
FIG. 1 is a schematic diagram of a preheating reduction device according to the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," 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; can be directly connected or indirectly connected through an intermediate medium, and can be communication 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 in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, a preheating and reducing device is provided in a first aspect of the present invention, and the preheating and reducing device may be used for preheating, reducing and smelting raw materials for producing calcium carbide, ferroalloy, yellow phosphorus and the like, and the preheating and reducing device includes:
the preheating reduction furnace is used for carrying out preheating reduction treatment on the added mixed material;
the gas inlet of the submerged arc furnace gas recovery treatment device is communicated with the discharge port of the submerged arc furnace, the gas outlet of the submerged arc furnace gas recovery treatment device is communicated with the gas inlet of a gas combustion chamber and is used for purifying gas generated by the submerged arc furnace and then sending the gas to the gas combustion chamber, and the gas combustion chamber is used for combusting the gas to generate hot flue gas which reversely flows into the preheating reduction furnace to preheat and reduce materials;
the material inlet valve and the material pipe after the preheating reduction treatment enter the submerged arc furnace.
Specifically, after the hot flue gas after gas combustion enters a preheating reduction furnace in countercurrent and exchanges heat with the mixed materials, part of minerals are prereduced at 700-900 ℃.
Preferably, the preheating reduction furnace is provided with a plurality of preheating reduction furnaces, and the plurality of preheating reduction furnaces are distributed.
The preheating reduction device further comprises a mixture feeding bin and a sealed bin with a control valve, wherein the mixture feeding bin is used for feeding 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.
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 for preheating reduction treatment.
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 first gas purifier is arranged to recover and purify the gas discharged from the gas outlet of the submerged arc furnace, the gas pressurizing fan is arranged to send the purified gas into the gas combustion chamber, and the gas combustion chamber is arranged to burn the purified gas and generate hot smoke.
Preferably, the submerged arc furnace gas recycling device further comprises a combustion-supporting fan, and an exhaust port of the combustion-supporting 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.
By arranging the combustion-supporting fan, a part of air can be blown into the gas combustion chamber to be mixed with the gas, so that the combustion-supporting effect is achieved.
Preferably, the preheating reduction device further comprises a flue gas recovery treatment device, an air inlet of the flue gas recovery treatment device is communicated with an air outlet of the preheating reduction furnace, an air outlet of the flue gas recovery treatment device is communicated with an air inlet of the preheating reduction furnace, and the flue gas recovery treatment device is used for purifying flue gas exhausted by the preheating reduction furnace and mixing the flue gas with hot flue gas to control the temperature and the components of the hot flue gas.
It should be noted that, through the flue gas recovery processing device, on the one hand can carry out recycle to the flue gas of preheating reduction furnace exhaust, the energy saving, on the other hand, through the flue gas of preheating reduction furnace exhaust after purifying with the hot flue gas mix can be used for controlling the temperature and the composition of hot flue gas, ensure the prereduction atmosphere through the back hot flue gas composition of control gas burning for the process of preheating reduction is more efficient.
The flue gas recovery treatment 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 gas discharged from the exhaust port of the preheating reduction furnace is recovered and purified by arranging a second gas purifier, and part of the purified gas is sent into the gas conditioner to be mixed with hot flue gas by arranging a gas recovery fan, and then is sent into the preheating reduction furnace after being mixed.
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 mixed material charging bin, then enters a preheating reduction furnace through a valve, the preheated reduction furnace is heated and prereduced, the preheated reduction furnace is subjected to preheating, the material enters an ore heating furnace for further smelting, gas discharged during smelting of the ore heating furnace enters a first gas purifier through an exhaust port for purification treatment, then enters a gas combustion chamber through a gas pressurizing fan for combustion to generate hot flue gas, the hot flue gas enters a gas conditioner, meanwhile, a combustion-supporting fan blows a part of air into the gas combustion chamber to be mixed with the gas, the combustion-supporting effect is achieved, the flue gas discharged from the preheating reduction furnace enters the preheating reduction furnace through a gas recovery fan for preheating reduction treatment after being treated by a second gas purifier, and the temperature and the components of the flue gas are regulated by mixing.
The beneficial effects of this embodiment are: the preheating reduction device can achieve high-temperature preheating of raw materials, the raw materials are heated to 500-900 ℃, water in the materials is removed, partial mineral prereduction is achieved, smelting electricity consumption is reduced, efficient utilization of submerged arc furnace gas can be achieved, reducing agent dehydration equipment can be omitted, running cost is reduced, and the utilization rate of raw materials is improved.
A second aspect of the embodiment of the present invention provides a preheating and reducing method, which is based on any one of the first aspect, and includes the following steps:
firstly, adding a material to be treated into a preheating reduction furnace;
purifying coal gas generated by the submerged arc furnace through a submerged arc furnace coal gas recovery processing device, and then delivering the purified coal gas to a coal gas combustion chamber for combustion;
purifying the flue gas discharged from the preheating reduction furnace through a flue gas recovery treatment device, mixing the flue gas with hot flue gas generated by a gas combustion chamber, and sending the mixture to the preheating reduction furnace to perform preheating reduction treatment on materials;
and sending the material subjected to preheating reduction treatment to an ore smelting furnace for further smelting.
In this embodiment, the preheating reduction method further includes mixing part of air into the gas combustion chamber through the combustion fan to perform mixed combustion with the gas.
In the embodiment, the dust concentration of the purified gas is within 10mg/Nm3, the carbon monoxide content in the gas is between 68 and 82 percent, and the temperature of the gas is not higher than 70 degrees.
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 may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that variations and modifications could be made by those skilled in the art without departing from the spirit of the invention, which would fall within the protection of the invention.
Claims (8)
1. A preheating reduction apparatus, comprising:
preheating a reduction furnace;
the gas recycling device of the submerged arc furnace is characterized in that a gas inlet of the submerged arc furnace gas recycling device is communicated with a discharge port of the submerged arc furnace, a gas outlet of the submerged arc furnace gas recycling device is communicated with a gas inlet of a gas combustion chamber and is used for purifying gas generated by the submerged arc furnace and then sending the purified gas to the gas combustion chamber, carbon monoxide content in the purified gas is 68-82%, the gas combustion chamber is used for burning gas to generate hot flue gas to flow back into a preheating reduction furnace for preheating reduction treatment of materials, the preheating reduction atmosphere is ensured by controlling the components of the hot flue gas after the gas is burnt, and partial minerals are prereduced in the preheating reduction furnace at 700-900 ℃ through the heating and prereducing processes of the materials;
the flue gas recovery treatment device is used for purifying the flue gas exhausted by the preheating reduction furnace and mixing the flue gas with hot flue gas to control the temperature and the components of the hot flue gas; the flue gas recovery treatment 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 flue gas discharged from the preheating reduction furnace is treated by the second gas purifier, enters the gas conditioner through the gas recovery fan, is mixed with hot flue gas to adjust the temperature and the components, and enters the preheating reduction furnace to perform preheating reduction treatment on materials;
the ore smelting furnace is used for further smelting the preheated and reduced materials, and a discharge port of the preheating and reducing furnace is communicated with a feed port of the ore smelting furnace through a valve and a material pipe.
2. The preheating reduction device according to claim 1, further comprising a mix feed bin for feeding material to the sealed bin with control valve for controlling the feeding of material to the preheating reduction furnace, and a sealed bin with control valve.
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, 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.
4. A 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. A pre-heating reduction method, based on a pre-heating reduction device according to any one of claims 1-4, characterized by comprising the steps of:
adding a material to be treated into a preheating reduction furnace;
purifying coal gas generated by the submerged arc furnace through a submerged arc furnace coal gas recovery processing device, and then delivering the purified coal gas to a coal gas combustion chamber for combustion;
purifying the flue gas discharged from the preheating reduction furnace through a flue gas recovery treatment device, mixing the flue gas with hot flue gas generated by a gas combustion chamber, and sending the mixture to the preheating reduction furnace to perform preheating reduction treatment on materials;
and sending the material subjected to preheating reduction treatment to an ore smelting furnace for further smelting.
6. The method according to claim 5, further comprising mixing part of the air into a gas combustion chamber by a combustion fan to perform mixed combustion with the gas.
7. The method of preheating and reducing according to claim 5, wherein the dust concentration of the purified gas is within 10mg/Nm3, the carbon monoxide content in the gas is between 68% and 82%, and the gas temperature is not higher than 70 ℃.
8. The preheating reduction method according to claim 5, 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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| CN208887369U (en) * | 2018-09-30 | 2019-05-21 | 河南省德耀节能科技股份有限公司 | Energy-efficient mineral hot furnace |
| CN109724419A (en) * | 2019-01-17 | 2019-05-07 | 中冶东方工程技术有限公司 | A kind of raw material preheating device and raw material preheating method |
| CN211999857U (en) * | 2020-04-26 | 2020-11-24 | 龙岩山青冶金科技有限公司 | System for high carbon ferrochrome is smelted and is dealt with stainless steel dirt mud in coordination |
| CN111750681A (en) * | 2020-07-16 | 2020-10-09 | 东北大学 | Mixed material preheating device and method for preheating materials by using same |
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