CN105274419A - Technique for producing steel containing nickel - Google Patents
Technique for producing steel containing nickel Download PDFInfo
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- CN105274419A CN105274419A CN201410338958.1A CN201410338958A CN105274419A CN 105274419 A CN105274419 A CN 105274419A CN 201410338958 A CN201410338958 A CN 201410338958A CN 105274419 A CN105274419 A CN 105274419A
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Abstract
The invention relates to a technique for producing steel containing nickel. The technique comprises the steps that molten iron at the temperature of 1400-1520 DEG C is prepared in a blast furnace, the molten iron is transferred into a converter or an electric furnace, minerals containing nickel are added into the converter or the electric furnace, and the minerals containing nickel are made to make contact with the molten iron; and the minerals containing nickel and the molten iron are heated to the temperature of 1400-1600 DEG C to be smelted. According to the technique for producing the steel containing nickel, a traditional technique for producing the steel containing nickel is fully optimized, and the smelting process and the production process of ferronickel and metallic nickel are omitted; nickel-iron alloy and the metallic nickel are replaced with the minerals containing nickel, so that the nickel yield is guaranteed, the production cost is greatly reduced, production efficiency is improved, economic input is reduced, a large quantity of raw materials are saved, and the technique is suitable for being applied and popularized in the fields relevant to smelting of the steel containing nickel.
Description
Technical field
The present invention relates to a kind of steel alloy smelting process, particularly relate to a kind of containing nickel steel production technique.
Background technology
At present, metallic nickel generally comes into one's own in smelting steel is produced, especially the production of stainless steel and high-grade alloy steel, 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, metallic nickel or Rhometal is added to reach composition needed for steel grade, in this process, consume a large amount of metallic nickel or Rhometal, some then directly adopts containing nickel steel production technique and electrolytic nickel is joined in steel melting furnace the mode of carrying out smelting carries out, wherein, although electrolytic nickel purity is high, but production technique cost is high, and, to use nickel sulfide ore to prepare the in the majority of electrolytic nickel and Rhometal in existing technique, in production process, more serious pollution is also caused to environment, therefore, the nickeliferous thing added from ore source and smelting steel is needed to carry out research emphatically for the smelting containing nickel steel, in guarantee containing while nickel steel quality, optimized production process, abundant reduction production cost, energy-saving consumption-reducing, and effectively reduce the discharge of environmental pollutant.
In prior art, patent of invention ZL201210300692.2 discloses in a kind of converter and adopts low nickel pig iron smelting containing the method for nickel steel, belongs to converter steeling technology field.The technical parameter controlled in technique is: low nickel pig iron proportional quantity calculates according to the actual nickel content in the low nickel pig iron and specific absorption 99%; Furnace charge is configured to: molten iron, steel scrap and the low nickel pig iron, bessemerizes whole converting process oxygen-supplying amount rising 2%-10% in process.This invention to a certain extent, be beneficial to nickel content 0.10 ~ 0.50% steel grade smelt reduce costs, comparatively effectively reduce converter producing containing nickel steel time to electrolytic nickel or ferronickel etc. high price alloy resource dependence, but, this invention only embodies the recycling to the low nickel pig iron and steel scrap at raw material, technique still needs oxygen blast, adds lime alkali tune degree, optimize preferably, make its cost reduce limitation.
Summary of the invention
The object of the invention is, for prior art Problems existing, provide a kind of containing nickel steel production technique, with a large amount of starting material of production technique saving optimized, ensure containing while nickel steel quality, significantly reduce the Financial cost of production, and effectively reduce the discharge of environmental pollutant.
The technical scheme that the present invention deals with problems is: a kind of containing nickel 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) nickel-containing mineral is added
In the converter described in step (2) or electric furnace, add nickel-containing mineral, make it contact with molten iron;
(4) smelt
The molten iron of step (3) and nickel-containing 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 nickel, and nickel oxide can be made fully to be reduced to metallic nickel
Further, in described step (3), described nickel-containing mineral is the nickel ores that red soil nickel ore etc. contains nickel oxide; Preferably, the nickel content of described nickel-containing mineral is 0.3% ~ 3.0%; Preferably, the particle diameter of described nickel-containing mineral is 20mm ~ 150mm.
Further, in described step (3), the nickel-containing mineral added is the nickel-containing mineral through pre-reduction treatment; Describedly to the step that nickel-containing mineral carries out pre-reduction treatment be: nickel-containing 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 nickel oxide part contained by nickel-containing mineral 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 nickel in nickel-containing mineral.
Preferably, in described step (3.2), the mixture of described nickel-containing 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 ° of C/min; The time that concrete roasting keeps and temperature rise rate are determined according to the granularity of the mixture of nickel-containing 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 ° of C/min to nickel-containing mineral and the blend heated temperature rise rate of molten iron.
Further, in described step (4), the mixture of nickel-containing 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 nickel to be restored, avoid reaction times long impact containing nickel steel quality to guarantee in nickel-containing mineral that nickel is thoroughly reduced 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 slagging agent adjusts bits composition, make it be recycled recycling.
Compared with prior art, the invention has the beneficial effects as follows: fully optimize traditional containing nickel steel production technique, smelting and the production process of ferronickel and metallic nickel are saved, replace Rhometal and metallic nickel with nickel-containing ore, while ensureing nickel 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 nickeliferous smelting steel field.
embodiment:
Embodiment 1
For prepare nickel content be 0.2% containing nickel steel, this kind comprises the steps: containing nickel steel production technique
(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) red soil nickel ore stone is added
In the electric furnace described in step (2), add the red soil nickel ore stone 400kg that nickel content is 2%, make it fully contact with molten iron;
(4) smelt
The molten iron of step (3) and red soil nickel ore stone are heated, is warming up to 1550 DEG C, and keep 10min at 1550 DEG C.
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 red soil nickel ore stone particle diameter is 20mm ~ 150mm;
In described step (4), be 15 ° of C/min to nickel-containing mineral and the blend heated temperature rise rate of molten iron.
Above-mentioned containing nickel steel production technique, make full use of high temperature in stove and its red soil nickel ore stone is melted, and C, Si composition activity made full use of in molten iron be better than the character of nickel, and nickel oxide is at high temperature reduced sufficiently as metallic nickel.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 slagging agent adjusts bits composition, make it be recycled recycling.
Above-mentionedly contain compared with nickel steel production technique containing nickel steel production technique with traditional, carried out significantly optimizing, saved smelting and the production process of ferronickel; Rhometal is replaced with nickel-containing ore; while ensureing nickel 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 nickel oxide ores raw material; be more conducive to protection of the environment, avoid the discharge of the pollutents such as sulfur-bearing.
Embodiment 2
For prepare nickel content be 0.2% containing nickel steel, this kind containing nickel steel production craft step with embodiment 1, unlike, in described step (3), the red soil nickel ore stone added is the nickel-containing mineral through pre-reduction treatment; Describedly to the step that red soil nickel ore stone carries out pre-reduction treatment be:
(3.1) mix with reductive agent after being pulverized by red soil nickel ore stone, the particle diameter of obtained mixture is 20mm-150mm;
(3.2) by gained mixture roasting 3h at 650 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 nickel in nickel-containing mineral.
In the above-described embodiments, by the pre-reduction treatment to red soil nickel ore stone, make that the nickel oxide part 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.
Above-mentioned is 0.19% containing nickel steel production technique gained containing nickel content in nickel steel, and nickel recovery rate is 95%.
Embodiment 3
For prepare nickel content be 0.2% containing nickel steel, this kind containing nickel steel production craft step with embodiment 1, unlike:
In step (1), in blast furnace, the molten iron that 4t temperature is 1400 DEG C is obtained;
In step (4), the red soil nickel ore stone of step (3) and molten iron are heated, is warming up to 1400 DEG C, and keep 8min at 1400 DEG C.
In above-described embodiment:
In described step (1), the mass percentage of the component of gained molten iron is: the Si of 2.0%, the C of 3.6%, and surplus is Fe;
In described step (3), described red soil nickel ore stone particle diameter is 40mm ~ 60mm;
In described step (4), be 10 ° of C/min to nickel-containing mineral and the blend heated temperature rise rate of molten iron.
Above-mentioned is 0.186% containing nickel steel production technique gained containing nickel content in nickel steel, and nickel recovery rate is 93%.
Claims (5)
1., containing a nickel steel production technique, it is characterized in that, comprise 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) nickel-containing mineral is added
Nickel-containing mineral is added in the converter described in step (2) or electric furnace;
(4) smelt
The molten iron of step (3) and nickel-containing mineral are carried out being heated to 1400 DEG C ~ 1600 DEG C.
2. according to claim 1 containing nickel steel production technique, it 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. according to claim 1 containing nickel steel production technique, it is characterized in that, in described step (3), described nickel-containing mineral is red soil nickel ore.
4. according to claim 1 containing nickel steel production technique, it is characterized in that, in described step (3), the nickel-containing mineral added is the nickel-containing mineral through pre-reduction treatment; Describedly to the step that nickel-containing mineral carries out pre-reduction treatment be: nickel-containing 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.
5. according to claim 4 containing nickel steel production technique, it is characterized in that, in described step (3.1), described reductive agent is one or several in carbon dust, graphite and coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338958.1A CN105274419A (en) | 2014-07-17 | 2014-07-17 | Technique for producing steel containing nickel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338958.1A CN105274419A (en) | 2014-07-17 | 2014-07-17 | Technique for producing steel containing nickel |
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| CN105274419A true CN105274419A (en) | 2016-01-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354214A (en) * | 2022-09-30 | 2022-11-18 | 日照钢铁控股集团有限公司 | Method for producing weathering steel with low energy consumption, low carbon emission and low cost |
-
2014
- 2014-07-17 CN CN201410338958.1A patent/CN105274419A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354214A (en) * | 2022-09-30 | 2022-11-18 | 日照钢铁控股集团有限公司 | Method for producing weathering steel with low energy consumption, low carbon emission and low cost |
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