CN109988961A - Copper bearing steel production technology - Google Patents
Copper bearing steel production technology Download PDFInfo
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- CN109988961A CN109988961A CN201711488268.4A CN201711488268A CN109988961A CN 109988961 A CN109988961 A CN 109988961A CN 201711488268 A CN201711488268 A CN 201711488268A CN 109988961 A CN109988961 A CN 109988961A
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- copper
- molten iron
- bearing
- bearing steel
- mineral
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of copper bearing steel production technologies, and including the molten iron that preparation temperature is 1400 DEG C~1520 DEG C in blast furnace, copper-bearing mineral is added into converter or electric furnace into converter perhaps electric furnace in transfer molten iron, contact it with molten iron；Heating copper-bearing mineral and molten iron are smelted to 1400 DEG C~1600 DEG C.The present invention sufficiently optimizes traditional copper bearing steel production technology, the smelting and production process of copper and iron are saved, replace copper-iron alloy with copper-containing ore, while ensureing copper recovery rate, production cost is significantly reduced, production efficiency is improved, reduces economic input, big content of starting materials has been saved, has been suitable for promoting and applying in related copper bearing steel field of smelting.
Description
Technical field
The present invention relates to a kind of steel alloy smelting process more particularly to a kind of copper bearing steel production technologies.
Background technique
Currently, copper bearing steel is widely used with its excellent physical mechanical property such as anticorrosive, such as vehicle and container plate
Deng, smelt technique mainly by steel-making (iron ore → sintering → blast furnace ironmaking → desulfurizing iron → converter (or electric furnace)
→ be added alloy → finely tunes composition → continuous casting → rolling → finished steel to LF furnace or RH or other refining equipments) converter or electricity
Heater stage carries out addition alloy treatment, i.e., copper-iron alloy is added in converter or electric furnace to reach composition needed for steel grade, in this work
In skill, a large amount of copper metals, and the high production cost of copper-iron alloy are consumed, accordingly, it is desirable to a large amount of economic inputs, especially
It is higher for the steel input cost for smelting regional high background, and wasted with vast resources.
In the prior art, patent of invention 200710200906.8 discloses the heating means and its production of a kind of copper bearing steel
Copper bearing steel.Not only it had been able to satisfy the production of plate class copper bearing steel, but also has been able to satisfy the copper-containing steel heating method of profile class copper bearing steel production.It should
Copper-containing steel heating method, using the heating means to heat up twice, step 1: the steel billet or slab of heating copper bearing steel to 1000~
1050℃；Step 2: with second of heat temperature raising is carried out within 30~90 minutes, the maximum temperature of second of heat temperature raising is 1250~
1290℃；In the heating process to heat up twice, steel billet or slab are when the heating temperature at each time point is not less than previous
Between point.The invention is that the production of cupric steel is improved, but following traditional plus copper-iron alloy steel substantially is raw material, technique
Early period, preparation was complicated, expended lot of materials, and economic cost is high.
Summary of the invention
The object of the present invention is in view of the problems of the existing technology, a kind of copper bearing steel production technology be provided, with optimization
Production technology saves a large amount of raw material, economic input is greatly reduced, and guarantee the quality of production of copper steel, especially makes copper therein
Content is to be fully ensured.
The technical solution that the present invention solves the problems, such as is: a kind of copper bearing steel production technology includes the following steps:
(1) molten iron is prepared
The molten iron that preparation temperature is 1400 DEG C~1520 DEG C in blast furnace；
(2) molten iron is shifted
The molten iron that step (1) obtains is added in converter or electric furnace；
(3) copper-bearing mineral is added
Copper-bearing mineral is added into converter described in step (2) or electric furnace, contacts it with molten iron；
(4) it smelts
The molten iron of step (3) is heated with copper-bearing mineral, is warming up to 1400 DEG C~1600 DEG C.
Further, in the step (1), the mass percentage of the component of gained molten iron are as follows: 2.0%~3.4%
Si, 3.6%~4.6% C, surplus Fe, for inevitable impurity such as S, P, content range be S≤0.3%, P≤
0.13%；At high temperature, C, Si composition activity in molten iron are better than copper, copper oxide can be made sufficiently to be reduced to metallic copper.
Further, in the step (3), the copper-bearing mineral is the Copper Ores based on copper oxide；Preferably, institute
The copper content for stating copper-bearing mineral is 0.3%~3.0%；Preferably, the partial size of the copper-bearing mineral is 20mm~150mm.
Further, in the step (3), the copper-bearing mineral of addition is the copper-bearing mineral by pre-reduction treatment；Institute
State the step of pre-reduction treatment is carried out to copper-bearing mineral are as follows: (3.1) mix copper-bearing mineral with reducing agent, the grain of gained mixture
Diameter is 20mm~150mm；(3.2) gained mixture is roasted at 550 DEG C~750 DEG C；The reducing agent described in step (3.1)
For carbon containing substance.In this pre-reduction treatment step, copper oxide portion contained by Copper Ores can be made to be reduced, part chemistry
Key is in the different degrees of state of activation, thus quick by reducing agents such as carbon after contacting it in step (4) with high temperature liquid iron
Reduction.
Preferably, in the step (3.1), the reducing agent is one of carbon dust, graphite and coal or several.
Preferably, in the step (3.1), carbon containing quality is the quality of copper in copper-bearing mineral in the reducing agent
3%~15%.
Preferably, in the step (3.2), the mixture of the copper-bearing mineral and reducing agent is roasted at 600 DEG C~700 DEG C
Burn 1~4h, wherein heating rate when heating mixture is preferred with 5~25 DEG C/min；The time and heating that specific roasting is kept
Rate is determined according to the granularity of copper-bearing mineral and the mixture of reducing agent, for example, partial size is that 80mm~150mm is with 4h
Good, partial size is that 20mm~40mm is preferred with 1h, and partial size is that 60mm~100mm is preferred with 3.5h, and partial size is 40mm~60mm, with 2h
It is preferred.
It further, is 10~20 to copper-bearing mineral and the blend heated heating rate of molten iron in the step (4)
℃/min。
Further, in the step (4), the mixture of copper-bearing mineral and molten iron keeps 8 at 1400 DEG C~1600 DEG C
~15min, actual temp and time are determined according to the amount of molten iron and copper to be restored, to ensure that copper is thorough in copper-bearing mineral
Bottom restores while avoiding reaction time too long influence copper bearing steel quality.
Preferably, in the step (1), molten iron is made through the heated by electrodes bulk pig iron.
Preferably, after above-mentioned smelting process, product can be carried out to go deep into working process, it can be to smelting residue
It is recycled, for example, bits ingredient is adjusted in lime needed for being added and/or molten slag agent according to the needs of practiced steel grade
It is whole, so that it is obtained recycling and reusing.
Compared with prior art, it the beneficial effects of the present invention are: sufficiently optimizing traditional copper bearing steel production technology, saves
The smelting and production process of copper and iron replaces copper-iron alloy with copper-containing ore, while ensureing copper recovery rate, significantly reduces life
Cost is produced, production efficiency is improved, economic input is reduced, has saved big content of starting materials, is suitable for leading in related cupric steel smelting
Domain promotes and applies.
Specific embodiment:
Embodiment 1
For the copper bearing steel for being 0.3% to prepare copper content, such copper bearing steel production technology includes the following 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 that step (1) obtains is added in electric furnace with ladle；
(3) Copper Ores are added
The Copper Ores 400kg that oxidation copper content is 3.0% is added into electric furnace described in step (2), connects it sufficiently with molten iron
Touching；
(4) it smelts
The molten iron that obtains of step (3) is heated with Copper Ores, is warming up to 1550 DEG C, and in 1550 DEG C of holding 10min.
In above-described embodiment:
In the step (1), the mass percentage of the component of gained molten iron are as follows: 2.7% Si, 4.1% C, surplus Fe；
In the step (3), the Copper Ores are cupric oxide ore；The Copper Ores partial size is 20mm~150mm；
It is 15 DEG C/min to copper-bearing mineral and the blend heated heating rate of molten iron in the step (4).
In above-mentioned copper bearing steel production technology, furnace high temperature is made full use of to dissolve its Copper Ores, and make full use of in molten iron
C, Si composition activity be better than copper property, be reduced sufficiently copper oxide at high temperature as metallic copper.In above-mentioned smelting process
After, product can be carried out to go deep into working process, can be recycled to residue is smelted, for example, according to practiced steel
The needs of kind, lime needed for being added and/or molten slag agent are adjusted bits ingredient, it is made to obtain recycling and reusing.
Above-mentioned copper bearing steel production technology is significantly optimized compared with traditional copper bearing steel production technology, section
The about smelting and production process of copper and iron replaces copper-iron alloy with copper-containing ore, while ensureing copper recovery rate, significantly reduces
Production cost is fully enhanced production efficiency, and correspondingly reduces a large amount of economic inputs, has saved big content of starting materials, and
And the selection of cupric oxide ore raw material, more conducively protection environment, avoid the discharge of the pollutants such as sulfur-bearing.
Embodiment 2
For the copper bearing steel for being 0.3% to prepare copper content, such copper bearing steel production craft step with embodiment 1, unlike,
In the step (3), the Copper Ores of addition are the copper-bearing mineral by pre-reduction treatment；It is described that prereduction is carried out to Copper Ores
The step of processing are as follows:
(3.1) it is mixed after crushing Copper Ores with reducing agent, the partial size that mixture is made is 20mm-150mm；
(3.2) gained mixture is roasted into 3h at 600 DEG C；
Wherein, the reducing agent is carbon dust, and carbon containing quality is 5% of the quality of copper in copper-bearing mineral in the reducing agent.
In the above-described embodiments, by the pre-reduction treatment to Copper Ores, it is reduced the copper oxide portion contained by it, portion
Chemical bond is divided to be in the different degrees of state of activation, to be restored after contacting it in step (4) with high temperature liquid iron by carbon etc.
Agent quickly restores, and then is conducive to greatly improve production efficiency.
Copper content is 0.282% in copper bearing steel obtained by above-mentioned copper bearing steel production technology, and copper recovery rate is 96%.
Claims (5)
1. a kind of copper bearing steel production technology, which comprises the steps of:
(1) molten iron is prepared
The molten iron that preparation temperature is 1400 DEG C~1520 DEG C in blast furnace；
(2) molten iron is shifted
The molten iron that step (1) obtains is added in converter or electric furnace；
(3) copper-bearing mineral is added
Copper-bearing mineral is added into converter described in step (2) or electric furnace；
(4) it smelts
It carries out the molten iron of step (3) and copper-bearing mineral to be heated to 1400 DEG C~1600 DEG C.
2. copper bearing steel production technology according to claim 1, which is characterized in that in the step (1), gained molten iron
The mass percentage of component are as follows: 2.0%~3.4% Si, 3.6%~4.6% C, surplus Fe.
3. copper bearing steel production technology according to claim 1, which is characterized in that in the step (3), the cupric of addition
Mineral are the copper-bearing mineral by pre-reduction treatment；Described the step of pre-reduction treatment is carried out to copper-bearing mineral are as follows: (3.1) will contain
Copper mineral is mixed with reducing agent, and the partial size of gained mixture is 20mm~150mm；(3.2) by gained mixture 550 DEG C~
It is roasted at 750 DEG C；In the step (3.1), the reducing agent is carbon containing substance.
4. copper bearing steel production technology according to claim 3, which is characterized in that in the step (3.1), the reduction
Agent is one of carbon dust, graphite and coal or several.
5. copper bearing steel production technology according to claim 3, which is characterized in that in the step (3.1), the reduction
Carbon containing quality is 3%~15% of copper mass in copper-bearing mineral in agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711488268.4A CN109988961A (en) | 2017-12-30 | 2017-12-30 | Copper bearing steel production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711488268.4A CN109988961A (en) | 2017-12-30 | 2017-12-30 | Copper bearing steel production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109988961A true CN109988961A (en) | 2019-07-09 |
Family
ID=67110523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711488268.4A Pending CN109988961A (en) | 2017-12-30 | 2017-12-30 | Copper bearing steel production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109988961A (en) |
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2017
- 2017-12-30 CN CN201711488268.4A patent/CN109988961A/en active Pending
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Application publication date: 20190709 |
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| WD01 | Invention patent application deemed withdrawn after publication |