CN103627836A - Steelmaking device and steelmaking method - Google Patents
Steelmaking device and steelmaking method Download PDFInfo
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- CN103627836A CN103627836A CN201310711580.0A CN201310711580A CN103627836A CN 103627836 A CN103627836 A CN 103627836A CN 201310711580 A CN201310711580 A CN 201310711580A CN 103627836 A CN103627836 A CN 103627836A
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Abstract
The invention relates to a steelmaking device and a steelmaking method. The steelmaking device comprises a reducing gas processing device and a smelting device, wherein the smelting device comprises a prereduction area, a soft melting area and a fusion area which are sequentially communicated, the fusion area is provided with an electrode and a flux spray gun, the reducing gas processing device is provided with an air inlet pipe and an exhaust pipe, the air inlet pipe is communicated with the soft melting area, and the exhaust pipe is communicated with the prereduction area. According to the steelmaking method, reducing gas is used for prereducing pellets or sintering ore materials, arc heat generated by the electrode is used for heating and melting the prereduced metallized pellets, high temperature flue gas generated in the process is used for deeply preheating and reducing the metallized pellets, and the flux sprayed by the spray gun is used for refining the molten steel. The steelmaking processes are reduced, middle steps of transporting materials are saved, the investment and production cost are lowered, the resource and energy consumption is lowered, emission of harmful gases is reduced, and the steelmaking device and the steelmaking method have very high economic value, environment protection property and social benefits.
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
At present STEELMAKING PRODUCTION has two kinds of technical process, and the one, take iron ore as the long flow process of raw material through blast furnace-converter process, another kind is to take the short flow process of eaf process that steel scrap, direct-reduced iron be raw material.The repetitive process that long flow process has passed through metal oxide reduction in iron ore, reoxidized, the coke of first iron ore being take in blast furnace restores the alloying elements such as Fe, Mn, Si and in this process, has infiltrated carbon as reductive agent, obtain qualified molten iron, again molten iron is transported to steelshop, in converter, by oxygen blast, carry out decarburization intensification, thereby 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, and investment and energy consumption are relatively low, but in industrial production, does not have the abbreviated system by iron ore direct steelmaking to occur at present.
The patent of the patent No. 98100242.0 " one-step steel-making process from iron ore ", this technological process be take and gone back raw coal, oxygen as fuel provides reducing gas and energy input, has the problems such as process carburizing amount is large, oxygen depletion amount is high, foreign matter content is high.The patent of the patent No. 99809948.1 " direct melting method and equipment " discloses a kind of method of direct melting metalliferous feed material, with oxygen pre-treatment coal, produce carbon and inflammable gas, metallic raw material, carbon and oxygen-containing gas are sprayed into direct smelting container, in direct smelting container, with carbon, make the energy and reductive agent is smelted into molten metal by metallic raw material; The essence of the method is on the basis of above-mentioned " one-step steel-making process from iron ore ", by coal through pretreated product for direct melting, 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, has reached 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 comprises prereduction district, soft heat district and the melting zone being communicated with successively, 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, described soft heat district front end 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 packed in prereduction district, reducing gas treatment unit is processed from zone of transition bottom suction flue gas simultaneously, the reducing gas obtaining after processing 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 and enter soft heat district under self gravitation effect, under the effect of high-temperature flue gas and molten liquid steel, metallized pellet soft heat continuation decline enter melting zone, metallized pellet melts by being arranged on the arc heat of the electrifying electrodes generation of melting zone, and carry out decarburization and desulfurizing and refining by being arranged on the flux that the fusion agent spray gun of melting zone sprays into, thereby obtain qualified molten steel.
Further, described flux is any one or several combination arbitrarily in lime, light dolomite, Wingdale, Fluorspar Powder, synthetic slag former, iron ore powder.
Beneficial effect of the present invention is: the present invention adopts reducing gas directly agglomerate or pellet material to be carried out to prereduction, metallized pellet after utilizing arc heat that electrode produces to prereduction carries out heat fused, utilize the high-temperature flue gas producing in process to carry out degree of depth preheating and reduction to metallized pellet, utilize the flux that spray gun sprays into carry out liquid steel refining; Compare with conventional smelting iron and steel flow process, shortened smelting iron and steel technical process, reduced occupation of land, reduced a large amount of intermediate materials and had bad luck link, reduced investment and production cost, reduced the consumption of the resources such as oxygen and the energy, reduced CO
2and the discharge of obnoxious flavour, improved the recovery rate of metallic element, reduced 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 object, technical scheme and the advantage of invention clearer, 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 comprises prereduction district 1, soft heat district 3 and the melting zone 4 being communicated with successively, 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.Metallized pellet after utilizing electric arc that electrode 5 produces to prereduction carries out heat fused, utilizes the high-temperature flue gas producing in process to carry out degree of depth preheating and reduction to metallized pellet, utilizes the flux that fusion agent spray gun 6 sprays into carry out liquid steel refining.
In the present embodiment, described vapor pipe 9 is communicated with 1 middle and lower part, prereduction district, allows reducing gas from the bottom up fully to agglomerate or pellet material generation reduction reaction.
In the present embodiment, described soft heat district 3 front ends are provided with zone of transition 2, and described zone of transition 2 inlet ends are communicated with prereduction district 1 exit end, and described inlet pipe 8 is communicated with zone of transition 2 bottoms.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 and ground level angle β are 0 °～90 °, described α >=β.
In the present embodiment, described prereduction district 1 is shaft furnace.
In the present embodiment, described electrode 5 quantity are at least 1, according to actual condition, carry out magnitude setting.
In the present embodiment, described fusion agent spray gun 6 quantity are at least 1, according to actual condition, carry out magnitude setting, and the amount that sprays into flux is controlled 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 reducing gas that processing obtains from the flue gas of suction cannot meet the demand of prereduction district 1 agglomerate or pellet material generation reduction reaction, open assisted Reduction gas air-supply duct 10Dui prereduction district 1 and carry out air feed, meet normally carrying out of reduction reaction.
A kind of method of using above-mentioned steel-smelting device steel-making of the present invention, agglomerate or pellet material are packed in prereduction district 1, reducing gas treatment unit 7 is processed from zone of transition 2 bottom suction flue gases simultaneously, the reducing gas obtaining after processing 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, make metallized pellet there is more than 85% degree of metalization and 1～4% carbon content, metallized pellet is expelled to zone of transition 2 and declines and enter soft heat district 3 under self gravitation effect, under the effect of high-temperature flue gas and molten liquid steel, metallized pellet soft heat continuation decline enter melting zone 4, metallized pellet melts by being arranged on the arc heat of the electrode 5 energising generations of melting zone 4, and carry out decarburization and desulfurizing and refining by being arranged on the flux that the fusion agent spray gun 6 of melting zone 4 sprays into, thereby obtain qualified molten steel.
In the present embodiment, described flux is any one or several combination arbitrarily in lime, light dolomite, Wingdale, Fluorspar Powder, synthetic slag former, iron ore powder.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although by with reference 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, can to it, make various changes in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (9)
1. a steel-smelting device, it is characterized in that: comprise reducing gas treatment unit and smelting apparatus, described smelting apparatus comprises prereduction district, soft heat district and the melting zone being communicated with successively, 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.
2. a kind of steel-smelting device according to claim 1, is characterized in that: described vapor pipe is communicated with middle and lower part, prereduction district.
3. a kind of steel-smelting device according to claim 1, is characterized in that: described soft heat district front end 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.
4. a kind of steel-smelting device according to claim 1, is characterized in that: described prereduction district is shaft furnace.
5. a kind of steel-smelting device according to claim 1, is characterized in that: described number of electrodes is at least 1.
6. a kind of steel-smelting device according to claim 1, is characterized in that: described fusion agent spray gun quantity is at least 1.
7. 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.
8. the method that a kind of steel-smelting device described in right to use requirement 1 to 7 any one is made steel, it is characterized in that: agglomerate or pellet material are packed in prereduction district, reducing gas treatment unit is processed from zone of transition bottom suction flue gas simultaneously, the reducing gas obtaining after processing 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 and enter soft heat district under self gravitation effect, under the effect of high-temperature flue gas and molten liquid steel, metallized pellet soft heat continuation decline enter melting zone, metallized pellet melts by being arranged on the arc heat of the electrifying electrodes generation of melting zone, and carry out decarburization and desulfurizing and refining by being arranged on the flux that the fusion agent spray gun of melting zone sprays into, thereby obtain qualified molten steel.
9. the method for a kind of steel-making according to claim 8, is characterized in that: described flux is any one or several combination arbitrarily in lime, light dolomite, Wingdale, Fluorspar Powder, synthetic slag former, iron ore powder.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020087733A1 (en) * | 2018-11-02 | 2020-05-07 | 山东大学 | Short-process smelting reduction iron-making system and method |
| 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 |
| WO2021035821A1 (en) * | 2019-08-30 | 2021-03-04 | 东北大学 | Cyclone flashing-speed reduction direct steelmaking system and process |
| CN113789420A (en) * | 2021-08-10 | 2021-12-14 | 赵晓 | Direct steelmaking device for iron-containing powder in reducing atmosphere and use method |
| CN115354115A (en) * | 2022-10-18 | 2022-11-18 | 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
- 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020087733A1 (en) * | 2018-11-02 | 2020-05-07 | 山东大学 | Short-process smelting reduction iron-making system and method |
| WO2021035821A1 (en) * | 2019-08-30 | 2021-03-04 | 东北大学 | Cyclone flashing-speed 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 |
| CN113789420A (en) * | 2021-08-10 | 2021-12-14 | 赵晓 | Direct steelmaking device for iron-containing powder in reducing atmosphere and use method |
| CN113789420B (en) * | 2021-08-10 | 2022-05-31 | 赵晓 | Direct steelmaking device for iron-containing powder in reducing atmosphere and using method |
| CN115354115A (en) * | 2022-10-18 | 2022-11-18 | 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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| CN103627836B (en) | 2015-09-09 |
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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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