CN103627836B - A kind of steel-smelting device and method - Google Patents
A kind of steel-smelting device and method Download PDFInfo
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- CN103627836B CN103627836B CN201310711580.0A CN201310711580A CN103627836B CN 103627836 B CN103627836 B CN 103627836B CN 201310711580 A CN201310711580 A CN 201310711580A CN 103627836 B CN103627836 B CN 103627836B
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Abstract
The present invention relates to a kind of steel-smelting device and method, comprise reducing gas treatment unit and smelting apparatus, described smelting apparatus comprise be communicated with successively prereduction district, soft heat district and melting zone, described melting zone is provided with electrode and fusion agent spray gun, described reducing gas treatment unit is provided with inlet pipe and vapor pipe, described inlet pipe is communicated with soft heat district, and described vapor pipe is communicated with prereduction district.The present invention adopts reducing gas to carry out prereduction to pellet or agglomerate material, the arc heat utilizing electrode to produce carries out heat fused to the metallized pellet after prereduction, utilize the high-temperature flue gas produced in process to carry out degree of depth preheating and reduction to metallized pellet, the flux utilizing spray gun to spray into carries out liquid steel refining.Present invention reduces smelting iron and steel technical process, decrease intermediate material and have bad luck link, reduce investment and production cost, reduce the consumption of resource and the energy, decrease the discharge of obnoxious flavour, there is high economic worth, the feature of environmental protection and social benefit.
Description
Technical field
The present invention relates to metallurgical technology field, be specifically related to a kind of steel-smelting device and method.
Background technology
Current STEELMAKING PRODUCTION has two kinds of technical process, and one is take iron ore as the long flow process of raw material through blast furnace-converter process, the eaf process short route that another kind is is raw material with steel scrap, direct-reduced iron.The repetitive process that long flow process have passed through metal oxide back in iron ore, reoxidizes, namely be first that reductive agent restores the alloying elements such as Fe, Mn, Si and is permeated with carbon in the process with coke in blast furnace by iron ore, obtain qualified molten iron, again molten iron is transported to steelshop, in converter, carry out decarburization intensification by oxygen blast, thus smelt into qualified molten steel; There is the variety of problems such as investment is high, occupation of land is large, energy consumption is high, environmental pollution is serious in this technical process.Abbreviated system by furnace melting, does not need coke, investment and energy consumption relatively low, but do not have in current industrial production and occurred by the abbreviated system of iron ore direct steelmaking.
The patent " one-step steel-making process from iron ore " of the patent No. 98100242.0, this technological process provides reducing gas and energy input with reduction coal, oxygen for fuel, there is the problems such as process carburizing amount is large, oxygen depletion amount is high, foreign matter content is high.The patent " direct melting method and equipment " of the patent No. 99809948.1 discloses a kind of method of direct melting metalliferous feed material, carbon and inflammable gas is produced with oxygen pre-treatment coal, metallic raw material, carbon and oxygen-containing gas are sprayed into direct smelting container, in direct smelting container, make the energy with carbon and metallic raw material is smelted into molten metal by reductive agent; The essence of the method is on the basis of above-mentioned " one-step steel-making process from iron ore ", coal is used for direct melting through pretreated product, but the method is only for the production of molten iron.
Summary of the invention
In view of this, the object of this invention is to provide a kind of steel-smelting device and method, its Production Flow Chart is short, recovery rate of iron is high, energy consumption is low, reach the object of energy-saving and emission-reduction.
The invention discloses a kind of steel-smelting device, comprise reducing gas treatment unit and smelting apparatus, described smelting apparatus comprise be communicated with successively prereduction district, soft heat district and melting zone, described melting zone is provided with electrode and fusion agent spray gun, described reducing gas treatment unit is provided with inlet pipe and vapor pipe, described inlet pipe is communicated with soft heat district, and described vapor pipe is communicated with prereduction district.
Further, described vapor pipe is communicated with middle and lower part, prereduction district.
Further, front end, described soft heat district is provided with zone of transition, and described zone of transition inlet end is communicated with prereduction district exit end, and described inlet pipe is communicated with zone of transition bottom.
Further, described prereduction district is shaft furnace.
Further, described number of electrodes is at least 1.
Further, described fusion agent spray gun quantity is at least 1.
Further, described prereduction district is provided with assisted Reduction gas air-supply duct.
The invention also discloses a kind of method of steel-making, agglomerate or pellet material are loaded in prereduction district, reducing gas treatment unit processes from zone of transition bottom drawing smoke simultaneously, the reducing gas obtained after process is blown into prereduction district by vapor pipe, with agglomerate or pellet material generation reduction reaction, metal oxide in agglomerate or pellet material is tentatively reduced into metallized pellet, metallized pellet is expelled to zone of transition and declines under self gravitation effect and enters soft heat district, metallized pellet soft heat under the effect of high-temperature flue gas and molten liquid steel also continues decline and enters melting zone, the arc heat that metallized pellet is produced by the electrifying electrodes being arranged on melting zone melts, and carry out decarburization and desulfurizing and refining by the flux that the fusion agent spray gun being arranged on melting zone sprays into, thus obtain qualified molten steel.
Further, described flux is any one or combinations several arbitrarily in lime, light dolomite, Wingdale, Fluorspar Powder, synthesis slag former, iron ore powder.
Beneficial effect of the present invention is: the present invention adopts reducing gas directly to carry out prereduction to agglomerate or pellet material, the arc heat utilizing electrode to produce carries out heat fused to the metallized pellet after prereduction, utilize the high-temperature flue gas produced in process to carry out degree of depth preheating and reduction to metallized pellet, the flux utilizing spray gun to spray into carries out liquid steel refining; Compared with conventional smelting iron and steel flow process, shorten smelting iron and steel technical process, decrease occupation of land, decrease a large amount of intermediate material and have bad luck link, reduce investment and production cost, reduce the consumption of the resources such as oxygen and the energy, decrease CO
2and the discharge of obnoxious flavour, improve the recovery rate of metallic element, reduce the consumption of iron and steel stock, there is high economic worth, the feature of environmental protection and social benefit.
Accompanying drawing explanation
In order to make the object of invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in the figure, a kind of steel-smelting device of the present invention, comprise reducing gas treatment unit 7 and smelting apparatus, described smelting apparatus comprise be communicated with successively prereduction district 1, soft heat district 3 and melting zone 4, described melting zone 4 is provided with electrode 5 and fusion agent spray gun 6, described reducing gas treatment unit 7 is provided with inlet pipe 8 and vapor pipe 9, and described inlet pipe 8 is communicated with soft heat district 3, and described vapor pipe 9 is communicated with prereduction district 1.The electric arc utilizing electrode 5 to produce carries out heat fused to the metallized pellet after prereduction, and utilize the high-temperature flue gas produced in process to carry out degree of depth preheating and reduction to metallized pellet, the flux utilizing fusion agent spray gun 6 to spray into carries out liquid steel refining.
In the present embodiment, described vapor pipe 9 is communicated with middle and lower part, prereduction district 1, makes reducing gas sufficient to agglomerate or pellet material generation reduction reaction from the bottom up.
In the present embodiment, front end, described soft heat district 3 is provided with zone of transition 2, and described zone of transition 2 inlet end is communicated with prereduction district 1 exit end, and described inlet pipe 8 is communicated with zone of transition 2 bottom.Agglomerate or pellet material cushion in zone of transition 2, progressively drop to soft heat district 3.Described zone of transition 2 is 0 ° ~ 90 ° with ground level angle α, and described soft heat district 3 is 0 ° ~ 90 ° with ground level angle β, described α >=β.
In the present embodiment, described prereduction district 1 is shaft furnace.
In the present embodiment, described electrode 5 quantity is at least 1, carries out magnitude setting according to actual condition.
In the present embodiment, described fusion agent spray gun 6 quantity is at least 1, carries out magnitude setting according to actual condition, sprays into the amount of flux to control molten steel composition.
In the present embodiment, described prereduction district 1 is provided with assisted Reduction gas air-supply duct 10, when reducing gas treatment unit 7 from suction flue gas process the reducing gas obtained cannot meet the demand of prereduction district 1 agglomerate or pellet material generation reduction reaction time, open assisted Reduction gas air-supply duct 10 pairs of prereduction districts 1 and carry out air feed, meet normally carrying out of reduction reaction.
A kind of method using above-mentioned steel-smelting device to make steel of the present invention, agglomerate or pellet material are loaded in prereduction district 1, reducing gas treatment unit 7 processes from zone of transition 2 bottom drawing smoke simultaneously, the reducing gas obtained after process is blown into prereduction district 1 by vapor pipe 9, with agglomerate or pellet material generation reduction reaction, metal oxide in agglomerate or pellet material is tentatively reduced into metallized pellet, metallized pellet is made to have the degree of metalization of more than 85% and the carbon content of 1 ~ 4%, metallized pellet is expelled to zone of transition 2 and declines under self gravitation effect and enters soft heat district 3, metallized pellet soft heat under the effect of high-temperature flue gas and molten liquid steel also continues decline and enters melting zone 4, the arc heat that metallized pellet is produced by electrode 5 energising being arranged on melting zone 4 melts, and carry out decarburization and desulfurizing and refining by the flux that the fusion agent spray gun 6 being arranged on melting zone 4 sprays into, thus obtain qualified molten steel.
In the present embodiment, described flux is any one or combinations several arbitrarily in lime, light dolomite, Wingdale, Fluorspar Powder, synthesis slag former, iron ore powder.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (7)
1. a steel-smelting device, it is characterized in that: comprise reducing gas treatment unit and smelting apparatus, described smelting apparatus comprise be communicated with successively prereduction district, soft heat district and melting zone, described melting zone is provided with electrode and fusion agent spray gun, described reducing gas treatment unit is provided with inlet pipe and vapor pipe, described inlet pipe is communicated with soft heat district, and described vapor pipe is communicated with prereduction district; Described vapor pipe is communicated with middle and lower part, prereduction district; Front end, described soft heat district is provided with zone of transition, and described zone of transition inlet end is communicated with prereduction district exit end, and described inlet pipe is communicated with zone of transition bottom.
2. a kind of steel-smelting device according to claim 1, is characterized in that: described prereduction district is shaft furnace.
3. a kind of steel-smelting device according to claim 1, is characterized in that: described number of electrodes is at least 1.
4. a kind of steel-smelting device according to claim 1, is characterized in that: described fusion agent spray gun quantity is at least 1.
5. a kind of steel-smelting device according to claim 1, is characterized in that: described prereduction district is provided with assisted Reduction gas air-supply duct.
6. use the method for a kind of steel-smelting device steel-making described in claim 1 to 5 any one, it is characterized in that: agglomerate or pellet material are loaded in prereduction district, reducing gas treatment unit processes from zone of transition bottom drawing smoke simultaneously, the reducing gas obtained after process is blown into prereduction district by vapor pipe, with agglomerate or pellet material generation reduction reaction, metal oxide in agglomerate or pellet material is tentatively reduced into metallized pellet, metallized pellet is expelled to zone of transition and declines under self gravitation effect and enters soft heat district, metallized pellet soft heat under the effect of high-temperature flue gas and molten liquid steel also continues decline and enters melting zone, the arc heat that metallized pellet is produced by the electrifying electrodes being arranged on melting zone melts, and carry out decarburization and desulfurizing and refining by the flux that the fusion agent spray gun being arranged on melting zone sprays into, thus obtain qualified molten steel.
7. the method for a kind of steel-making according to claim 6, is characterized in that: described flux is any one or combinations several arbitrarily in lime, light dolomite, Wingdale, Fluorspar Powder, synthesis slag former, iron ore powder.
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| CN103627836B true CN103627836B (en) | 2015-09-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109321703B (en) * | 2018-11-02 | 2023-09-29 | 河北燕山钢铁集团有限公司 | Short-process smelting reduction iron making system and method |
| CN110438277B (en) * | 2019-08-30 | 2020-12-22 | 东北大学 | Cyclone flash reduction direct steelmaking system and process |
| CN112410548A (en) * | 2020-09-29 | 2021-02-26 | 新疆吉泰低阶煤利用研究有限责任公司 | Process for preparing metallized hot pellets by using waste heat of electric arc furnace |
| CN113789420B (en) * | 2021-08-10 | 2022-05-31 | 赵晓 | Direct steelmaking device for iron-containing powder in reducing atmosphere and using method |
| CN115354115B (en) * | 2022-10-18 | 2023-02-03 | 北京科技大学 | Ultra-short flow low-carbon steel-making system based on cold-bonded pellets and use method |
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| CN1330162A (en) * | 2001-07-31 | 2002-01-09 | 雷少军 | Process and equipment for preparing spongy iron by two-step reduction method |
| CN101565769A (en) * | 2009-06-03 | 2009-10-28 | 北京首钢国际工程技术有限公司 | Electric furnace sponge iron hot charging device and method thereof |
| CN103045788A (en) * | 2012-12-04 | 2013-04-17 | 中冶赛迪工程技术股份有限公司 | Reduction steel-making method and reduction steel-marking device |
| CN103451344A (en) * | 2013-09-02 | 2013-12-18 | 北京科技大学 | CEO compound smelting reduction ironmaking plant and technology |
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- 2013-12-20 CN CN201310711580.0A patent/CN103627836B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330162A (en) * | 2001-07-31 | 2002-01-09 | 雷少军 | Process and equipment for preparing spongy iron by two-step reduction method |
| CN101565769A (en) * | 2009-06-03 | 2009-10-28 | 北京首钢国际工程技术有限公司 | Electric furnace sponge iron hot charging device and method thereof |
| CN103045788A (en) * | 2012-12-04 | 2013-04-17 | 中冶赛迪工程技术股份有限公司 | Reduction steel-making method and reduction steel-marking device |
| CN103451344A (en) * | 2013-09-02 | 2013-12-18 | 北京科技大学 | CEO compound smelting reduction ironmaking plant and technology |
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Owner name: CISDI ENGINEERING CO., LTD.;CISDI ENGINEERING CO., Effective date: 20140522 |
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Effective date of registration: 20140522 Address after: 400013 Chongqing City, Yuzhong District No. 2 Steel Road, No. 1 Applicant after: Zhongye Saide Engineering Technology Co., Ltd. Applicant after: CISDI Shanghai Engineering Co., Ltd. Address before: 400013 Chongqing City, Yuzhong District No. 2 Steel Road, No. 1 Applicant before: Zhongye Saide Engineering Technology Co., Ltd. |
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