CN105296837A - Production technology of copper-containing steel - Google Patents
Production technology of copper-containing steel Download PDFInfo
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- CN105296837A CN105296837A CN201410341188.6A CN201410341188A CN105296837A CN 105296837 A CN105296837 A CN 105296837A CN 201410341188 A CN201410341188 A CN 201410341188A CN 105296837 A CN105296837 A CN 105296837A
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Abstract
The invention relates to a production technology of copper-containing steel. The production technology of the copper-containing steel comprises the steps of preparing molten iron with the temperature of 1400-1520 DEG C in a blast furnace; transferring the molten iron to a converter or an electric furnace; adding copper-bearing mineral to the converter or the electric furnace to enable the copper-bearing mineral to make contact with the molten iron; and heating the copper-bearing mineral and the molten iron to be 1400-1600 DEG C for smelting. According to the production technology of the copper-containing steel, a traditional production technology of the copper-containing steel is fully optimized; the smelting process and the production process of copper and iron are omitted; copper iron alloy is replaced by the copper-bearing mineral, the yield of the copper is ensured, and meanwhile, the production cost is reduced significantly, so that the production efficiency is improved, the economic input is reduced, a large number of raw materials are saved, and the production technology is suitable for popularization and application in the related field of copper-containing steel smelting.
Description
Technical field
The present invention relates to a kind of steel alloy smelting process, particularly relate to a kind of Copper Bearing Steel production technique.
Background technology
At present, Copper Bearing Steel is widely used with its excellent physical and mechanical properties such as anticorrosive, as vehicle and container plate etc., its technique of smelting is mainly through carrying out adding alloy treatment in the converter of steel-making (iron ore → sintering → blast furnace ironmaking → desulfurizing iron → converter (or electric furnace) → add alloy → finely tune composition → continuous casting → rolling → finished steel to LF stove or RH or other refining unit) or electric furnace stage, namely in converter or electric furnace, copper-iron alloy is added to reach composition needed for steel grade, in this process, consume a large amount of copper metal, and the production cost of copper-iron alloy is high, correspondingly, need a large amount of economic input, especially higher for the steel input cost smelting regional high background, and with ample resources waste.
In prior art, patent of invention 200710200906.8 discloses a kind of heating means of Copper Bearing Steel and the Copper Bearing Steel of production thereof.The production of sheet material class Copper Bearing Steel can be met, the copper-containing steel heating method that section bar class Copper Bearing Steel is produced can be met again.This copper-containing steel heating method, adopts the heating means of twice intensification, the first step: the steel billet of heating Copper Bearing Steel or strand are to 1000 ~ 1050 DEG C; Second step: carried out second time heat temperature raising with 30 ~ 90 minutes, the top temperature of second time heat temperature raising is 1250 ~ 1290 DEG C; In the heat-processed of twice intensification, steel billet or strand are all not less than previous time point in the Heating temperature of each time point.This invention is that the production of cupric steel improves, but substantially to follow traditional copper-iron alloy steel that adds be raw material, and technique prepares complexity early stage, and at substantial material, Financial cost is high.
Summary of the invention
The object of the invention is, for prior art Problems existing, provide a kind of Copper Bearing Steel production technique, with a large amount of starting material of production technique saving optimized, significantly reduce economic input, and ensure the quality of production of copper steel, particularly make copper content wherein fully be ensured.
The technical scheme that the present invention deals with problems is: a kind of Copper Bearing Steel production technique, comprises the steps:
1) molten iron is prepared
In blast furnace, preparation temperature is the molten iron of 1400 DEG C ~ 1520 DEG C;
(2) molten iron is shifted
The molten iron that step (1) obtains is joined in converter or electric furnace;
3) copper-bearing mineral is added
In the converter described in step (2) or electric furnace, add copper-bearing mineral, make it contact with molten iron;
(4) smelt
The molten iron of step (3) and copper-bearing mineral are heated, is warming up to 1400 DEG C ~ 1600 DEG C.
Further, in described step (1), the mass percentage of the component of gained molten iron is: the Si of 2.0% ~ 3.4%, the C of 3.6% ~ 4.6%, and surplus is Fe, and for inevitable impurity as S, P, its content range is S≤0.3%, P≤0.13%; At high temperature, C, Si composition activity in molten iron is better than copper, and cupric oxide can be made fully to be reduced to metallic copper.
Further, in described step (3), described copper-bearing mineral is the Copper Ores based on cupric oxide; Preferably, the copper content of described copper-bearing mineral is 0.3% ~ 3.0%; Preferably, the particle diameter of described copper-bearing mineral is 20mm ~ 150mm.
Further, in described step (3), the copper-bearing mineral added is the copper-bearing mineral through pre-reduction treatment; Describedly to the step that copper-bearing mineral carries out pre-reduction treatment be: copper-bearing mineral mixes with reductive agent by (3.1), and the particle diameter of gained mixture is 20mm ~ 150mm; (3.2) by the roasting at 550 DEG C ~ 750 DEG C of gained mixture; Described in step (3.1), reductive agent is the material of carbon containing.In this pre-reduction treatment step, can make that the copper oxide portion contained by Copper Ores is reduced, partial chemical key is in active state in various degree, thus by reductive agent fast restores such as carbon after making it contact with high temperature liquid iron in step (4).Preferably, in described step (3.1), described reductive agent is one or several in carbon dust, graphite and coal.
Preferably, in described step (3.1), in described reductive agent, the quality of carbon containing is 3% ~ 15% of the quality of copper in copper-bearing mineral.Preferably, in described step (3.2), the mixture of described copper-bearing mineral and reductive agent is at 600 DEG C ~ 700 DEG C roasting 1 ~ 4h, and wherein, temperature rise rate during heated mixt is good with 5 ~ 25 DEG C/min; The time that concrete roasting keeps and temperature rise rate are determined according to the granularity of the mixture of copper-bearing mineral and reductive agent, such as, particle diameter is 80mm ~ 150mm is good with 4h, particle diameter is 20mm ~ 40mm is good with 1h, particle diameter is 60mm ~ 100mm is good with 3.5h, particle diameter is 40mm ~ 60mm, is good with 2h.
Further, in described step (4), be 10 ~ 20 DEG C/min to copper-bearing mineral and the blend heated temperature rise rate of molten iron.
Further, in described step (4), the mixture of copper-bearing mineral and molten iron keeps 8 ~ 15min at 1400 DEG C ~ 1600 DEG C, actual temp and time are determined according to the amount of molten iron and copper to be restored, to guarantee in copper-bearing mineral that copper is thoroughly reduced and avoid that the reaction times longly affects Copper Bearing Steel quality simultaneously.
Preferably, in described step (1), obtain molten iron through the block pig iron of heated by electrodes.
Preferably, after above-mentioned smelting technology terminates, processing treatment can be goed deep into product, can recycle, such as, according to the needs of practiced steel grade smelting residue, add required lime and/or molten slag agent adjusts bits composition, make it be recycled recycling.
Compared with prior art, the invention has the beneficial effects as follows: fully optimize traditional Copper Bearing Steel production technique, smelting and the production process of copper iron are saved, replace copper-iron alloy with copper-containing ore, while ensureing copper recovery rate, significantly reduce production cost, production efficiency is improved, reduce economic input, saved large content of starting materials, be suitable for applying in relevant Copper Bearing Steel field of smelting.
Embodiment
Embodiment 1
To prepare the Copper Bearing Steel that copper content is 0.3%, this kind of Copper Bearing Steel production technique comprises the steps:
(1) molten iron is prepared
The molten iron that 4t temperature is 1470 DEG C is obtained in blast furnace;
(2) molten iron is shifted
The molten iron hot metal ladle that step (1) obtains is joined in electric furnace;
(3) Copper Ores is added
In the electric furnace described in step (2), add the Copper Ores 400kg that cupric oxide content is 3.0%, it fully contacts with molten iron;
(4) smelt
By step (3) molten iron and Copper Ores heat, be warming up to 1550 DEG C, and at 1550 DEG C of maintenance 10min.
In above-described embodiment:
In described step (1), the mass percentage of the component of gained molten iron is: the Si of 2.7%, the C of 4.1%, and surplus is Fe;
In described step (3), described Copper Ores is cupric oxide ore; Described Copper Ores particle diameter is 20mm ~ 150mm;
In described step (4), be 15 DEG C/min to copper-bearing mineral and the blend heated temperature rise rate of molten iron.
In above-mentioned Copper Bearing Steel production technique, make full use of high temperature in stove and its Copper Ores is dissolved, and C, Si composition activity made full use of in molten iron is better than the character of copper, cupric oxide is at high temperature reduced sufficiently as metallic copper.After above-mentioned smelting technology terminates, processing treatment can be goed deep into product, can recycle smelting residue, such as, according to the needs of practiced steel grade, add required lime and/or molten slag agent adjusts bits composition, make it be recycled recycling.
Above-mentioned Copper Bearing Steel production technique, compared with traditional Copper Bearing Steel production technique, has carried out significantly optimizing, and has saved smelting and the production process of copper iron; copper-iron alloy is replaced with copper-containing ore; while ensureing copper recovery rate, significantly reduce production cost, production efficiency is fully enhanced; and correspondingly reduce a large amount of economic input; save large content of starting materials, and, choosing of cupric oxide ore raw material; be more conducive to protection of the environment, avoid the discharge of the pollutents such as sulfur-bearing.
Embodiment 2
To prepare the Copper Bearing Steel that copper content is 0.3%, this kind of Copper Bearing Steel production craft step with embodiment 1, unlike, in described step (3), the Copper Ores added is the copper-bearing mineral through pre-reduction treatment; Describedly to the step that Copper Ores carries out pre-reduction treatment be:
(3.1) mix with reductive agent after being pulverized by Copper Ores, the particle diameter of obtained mixture is 20mm-150mm;
(3.2) by gained mixture roasting 3h at 600 DEG C;
Wherein, described reductive agent is carbon dust, and in described reductive agent, the quality of carbon containing is 5% of the quality of copper in copper-bearing mineral.
In the above-described embodiments, by the pre-reduction treatment to Copper Ores, make that the copper oxide portion contained by it is reduced, partial chemical key is in active state in various degree, thus by reductive agent fast restores such as carbon after making it contact with high temperature liquid iron in step (4), and then be beneficial to and significantly enhance productivity.
In above-mentioned Copper Bearing Steel production technique gained Copper Bearing Steel, copper content is 0.282%, and copper recovery rate is 96%.
For a person skilled in the art, after reading above-mentioned explanation, various changes and modifications undoubtedly will be apparent.Therefore, appending claims should regard the whole change and correction of containing true intention of the present invention and scope as.In Claims scope, the scope of any and all equivalences and content, all should think and still belong to the intent and scope of the invention.
Claims (8)
1. a Copper Bearing Steel production technique, is characterized in that, comprises the steps:
(1) molten iron is prepared
In blast furnace, preparation temperature is the molten iron of 1400 DEG C ~ 1520 DEG C;
(2) molten iron is shifted
The molten iron that step (1) obtains is joined in converter or electric furnace;
(3) copper-bearing mineral is added
Copper-bearing mineral is added in the converter described in step (2) or electric furnace;
(4) smelt
The molten iron of step (3) and copper-bearing mineral are carried out being heated to 1400 DEG C ~ 1600 DEG C.
2. Copper Bearing Steel production technique according to claim 1, is characterized in that, in described step (1), the mass percentage of the component of gained molten iron is: the Si of 2.0% ~ 3.4%, the C of 3.6% ~ 4.6%, and surplus is Fe.
3. Copper Bearing Steel production technique according to claim 1, is characterized in that, in described step (3), the copper-bearing mineral added is the copper-bearing mineral through pre-reduction treatment;
Describedly to the step that copper-bearing mineral carries out pre-reduction treatment be: copper-bearing mineral mixes with reductive agent by (3.1), and the particle diameter of gained mixture is 20mm ~ 150mm; (3.2) by the roasting at 550 DEG C ~ 750 DEG C of gained mixture; In described step (3.1), described reductive agent is the material of carbon containing.
4. Copper Bearing Steel production technique according to claim 3, is characterized in that, in described step (3.1), described reductive agent is one or several in carbon dust, graphite and coal.
5. Copper Bearing Steel production technique according to claim 3, is characterized in that, in described step (3.1), in described reductive agent, the quality of carbon containing is 3% ~ 15% of copper mass in copper-bearing mineral.
6. Copper Bearing Steel production technique according to claim 3, is characterized in that, in described step (3.2), the mixture of described copper-bearing mineral and reductive agent is at 600 DEG C ~ 700 DEG C roasting 1 ~ 4h.
7. Copper Bearing Steel production technique according to claim 1, is characterized in that, in described step (4), is 10 ~ 20 DEG C/min to copper-bearing mineral and the blend heated temperature rise rate of molten iron.
8. Copper Bearing Steel production technique according to claim 1, is characterized in that, in described step (4), the mixture of copper-bearing mineral and molten iron keeps 8 ~ 15min at 1400 DEG C ~ 1600 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410341188.6A CN105296837A (en) | 2014-07-18 | 2014-07-18 | Production technology of copper-containing steel |
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| CN201410341188.6A CN105296837A (en) | 2014-07-18 | 2014-07-18 | Production technology of copper-containing steel |
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| CN105296837A true CN105296837A (en) | 2016-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109648265A (en) * | 2018-12-27 | 2019-04-19 | 四川艾格瑞特模具科技股份有限公司 | A kind of method of highly-efficient processing production precision machinery |
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2014
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109648265A (en) * | 2018-12-27 | 2019-04-19 | 四川艾格瑞特模具科技股份有限公司 | A kind of method of highly-efficient processing production precision machinery |
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Application publication date: 20160203 |