CN106811571A - Copper bearing steel production technology - Google Patents
Copper bearing steel production technology Download PDFInfo
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- CN106811571A CN106811571A CN201510846114.2A CN201510846114A CN106811571A CN 106811571 A CN106811571 A CN 106811571A CN 201510846114 A CN201510846114 A CN 201510846114A CN 106811571 A CN106811571 A CN 106811571A
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- Prior art keywords
- copper
- molten iron
- bearing
- production technology
- mineral
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of copper bearing steel production technology, the molten iron that preparation temperature in blast furnace is 1400 DEG C~1520 DEG C is included in, in transfer molten iron to converter or electric furnace, to copper-bearing mineral is added in converter or electric furnace, it is contacted with molten iron；Heating copper-bearing mineral and molten iron is smelted to 1400 DEG C~1600 DEG C.The present invention fully optimizes traditional copper bearing steel production technology, smelting and the production process of copper and iron are saved, copper-iron alloy is replaced with copper-containing ore, while ensureing copper recovery rate, production cost is significantly reduced, production efficiency is improved, economic input is reduced, big content of starting materials is saved, has been suitable in related copper bearing steel field of smelting popularization and application.
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 technology.
Background technology
At present, copper bearing steel is widely used with its excellent physical and mechanical properties such as anticorrosive, such as vehicle and container plate
Deng, its smelt technique mainly by steel-making（Iron ore → sintering → blast furnace ironmaking → desulfurizing iron → converter（Or electric furnace）
→ addition alloy → finely tune composition → continuous casting → rolling → finished steel to LF stoves 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 come composition needed for reaching steel grade, in this work
In skill, a large amount of copper metals are consumed, and the production cost of copper-iron alloy is high, accordingly, it is desirable to a large amount of economic inputs, especially
Steel input cost for smelting regional high background is higher, and is wasted with ample resources.
In the prior art, patent of invention 200710200906.8 discloses heating means and its production of a kind of copper bearing steel
Copper bearing steel.The production of sheet material class copper bearing steel can be met, the copper-containing steel heating method of section bar class copper bearing steel production can be met again.Should
Copper-containing steel heating method, using the heating means for heating up twice, the first step：Heat the steel billet or strand of copper bearing steel to 1000~
1050℃；Second step：With carrying out within 30~90 minutes second heat temperature raising, second maximum temperature of heat temperature raising be 1250~
1290℃；In the heating process for heating up twice, steel billet or strand are when the heating-up temperature at each time point is not less than previous
Between point.The invention is improved for the production of cupric steel, but it is raw material, technique to follow traditional plus copper-iron alloy steel substantially
Early stage prepares complexity, expends lot of materials, and financial cost is high.
The content of the invention
The purpose of the present invention is, for the problem that prior art is present, there is provided a kind of copper bearing steel production technology, with what is optimized
Production technology saves a large amount of raw material, is greatly reduced economic input, and ensures the quality of production of copper steel, particularly makes copper therein
Content is to be fully ensured.
The technical scheme of solve problem of the present invention is：A kind of copper bearing steel production technology, comprises the following steps：
1）Prepare molten iron
Preparation temperature is 1400 DEG C~1520 DEG C of molten iron in blast furnace；
（2）Transfer molten iron
By step（1）The molten iron for obtaining is added in converter or electric furnace；
3）Add copper-bearing mineral
To step（2）Copper-bearing mineral is added in described converter or electric furnace, it is contacted with molten iron；
（4）Smelt
By step（3）Molten iron heated with copper-bearing mineral, be warming up to 1400 DEG C~1600 DEG C.
Further, in the step（1）In, the weight/mass percentage composition of the component of gained molten iron is：2.0%~3.4%
Si, 3.6%~4.6% C, balance of Fe, for inevitable impurity such as S, P, its content range be S≤0.3%, P≤
0.13%；At high temperature, C, Si composition activity in molten iron are better than copper, and cupric oxide can be made fully to be reduced to metallic copper.
Further, in the step（3）In, the copper-bearing mineral is the Copper Ores based on cupric oxide；Preferably, institute
The copper content for stating copper-bearing mineral is 0.3%~3.0%；It is preferred that the particle diameter of the copper-bearing mineral is 20mm~150mm.
Further, in the step（3）In, the copper-bearing mineral of addition is by the copper-bearing mineral of pre-reduction treatment；Institute
Stating the step of carrying out pre-reduction treatment to copper-bearing mineral is：（3.1）Copper-bearing mineral is mixed with reducing agent, the grain of gained mixture
Footpath is 20mm~150mm；（3.2）Gained mixture is calcined at 550 DEG C~750 DEG C；In step（3.1）Described in reducing agent
It is carbon containing material.In this pre-reduction treatment step, can be reduced the copper oxide portion contained by Copper Ores, part chemistry
Key is in the different degrees of state of activation, so that it is in step（4）In contacted with high temperature liquid iron after it is quick by reducing agents such as carbon
Reduction.Preferably, in the step（3.1）In, the reducing agent be carbon dust, graphite and coal in one or several.
Preferably, in the step（3.1）In, carbon containing quality is the quality of copper in copper-bearing mineral in the reducing agent
3%~15%.Preferably, in the step（3.2）In, the copper-bearing mineral is roasted with the mixture of reducing agent at 600 DEG C~700 DEG C
1~4h is burnt, wherein, heating rate during heating mixture is preferred with 5~25 DEG C/min；Time and intensification that specific roasting keeps
Speed is determined according to copper-bearing mineral with the granularity of the mixture of reducing agent, for example, particle diameter is with 4h for 80mm~150mm
Good, particle diameter is preferred for 20mm~40mm with 1h, and particle diameter is preferred for 60mm~100mm with 3.5h, and particle diameter is 40mm~60mm, with 2h
It is preferred.
Further, in the step（4）In, it is 10~20 to copper-bearing mineral and the blend heated heating rate of molten iron
℃/min。
Further, in the step（4）In, copper-bearing mineral keeps 8 with the mixture of molten iron 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, thorough with copper in ensuring copper-bearing mineral
Bottom reduction avoids reaction time long influence copper bearing steel quality simultaneously.
Preferably, in the step（1）In, molten iron is obtained through the heated by electrodes bulk pig iron.
Preferably, after above-mentioned smelting process terminates, product can be carried out to go deep into working process, can be to smelting residue
Recycled, for example, the need for according to practiced steel grade, lime and/or molten slag agent needed for adding are adjusted to bits composition
It is whole, it is recycled recycling.
Compared with prior art, the beneficial effects of the invention are as follows：Traditional copper bearing steel production technology is fully optimized, is saved
The smelting of copper and iron and production process, copper-iron alloy is replaced with copper-containing ore, while ensureing copper recovery rate, significantly reduces life
Cost is produced, production efficiency is improved, economic input is reduced, big content of starting materials has been saved, is suitable to be led in related cupric steel smelting
Domain popularization and application.
Specific embodiment
Embodiment 1
As a example by preparing the copper bearing steel that copper content is 0.3%, this kind of copper bearing steel production technology comprises the following steps：
（1）Prepare molten iron
The molten iron that 4t temperature is 1470 DEG C is obtained in blast furnace；
（2）Transfer molten iron
By step（1）The molten iron ladle for obtaining is added in electric furnace；
（3）Add Copper Ores
To step（2）The Copper Ores 400kg that oxidation copper content is 3.0% is added in described electric furnace, it is fully contacted with molten iron；
（4）Smelt
By step（3）Molten iron is heated with Copper Ores, be warming up to 1550 DEG C, and in 1550 DEG C of holding 10min.
In above-described embodiment：
In the step（1）In, the weight/mass percentage composition of the component of gained molten iron is：2.7% Si, 4.1% C, balance of Fe；
In the step（3）In, the Copper Ores are cupric oxide ore；The Copper Ores particle diameter is 20mm~150mm；
In the step（4）In, it is 15 DEG C/min to copper-bearing mineral and the blend heated heating rate of molten iron.
In above-mentioned copper bearing steel production technology, make full use of stove high temperature to dissolve its Copper Ores, and make full use of molten iron
C, Si composition activity better than copper property, it is metallic copper cupric oxide is reduced sufficiently at high temperature.In above-mentioned smelting process
After end, product can be carried out going deep into working process, can be recycled to smelting residue, for example, according to practiced steel
The need for kind, lime and/or molten slag agent needed for adding are adjusted to bits composition, it is recycled recycling.
Above-mentioned copper bearing steel production technology is significantly optimized compared with traditional copper bearing steel production technology, section
About the smelting of copper and iron and production process, copper-iron alloy is replaced with copper-containing ore, while ensureing copper recovery rate, is significantly reduced
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 environmental protection, it is to avoid the discharge of the pollutant such as sulfur-bearing.
Embodiment 2
As a example by preparing the copper bearing steel that copper content is 0.3%, this kind of copper bearing steel production craft step with embodiment 1, unlike,
In the step（3）In, the Copper Ores of addition are by the copper-bearing mineral of pre-reduction treatment；It is described that prereduction is carried out to Copper Ores
The step for the treatment of is：
（3.1）Mix with reducing agent after Copper Ores are crushed, the particle diameter that mixture is obtained is 20mm-150mm；
（3.2）Gained mixture is calcined 3h at 600 DEG C；
Wherein, the reducing agent is carbon dust, and carbon containing quality is the 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, so that it is in step（4）In contacted with high temperature liquid iron after reduced by carbon etc.
Agent is quickly reduced, and then beneficial to greatly improving production efficiency.
Copper content is 0.282% in above-mentioned copper bearing steel production technology gained copper bearing steel, and copper recovery rate is 96%.
For a person skilled in the art, after reading described above, various changes and modifications undoubtedly will be evident that.
Therefore, appending claims should regard the whole variations and modifications for covering true intention of the invention and scope as.In power
Any and all scope and content of equal value, are all considered as still belonging to the intent and scope of the invention in the range of sharp claim.
Claims (8)
1. a kind of copper bearing steel production technology, it is characterised in that comprise the following steps：
（1）Prepare molten iron
Preparation temperature is 1400 DEG C~1520 DEG C of molten iron in blast furnace；
（2）Transfer molten iron
By step（1）The molten iron for obtaining is added in converter or electric furnace；
（3）Add copper-bearing mineral
To step（2）Copper-bearing mineral is added in described converter or electric furnace；
（4）Smelt
By step（3）Molten iron and copper-bearing mineral carry out being heated to 1400 DEG C~1600 DEG C.
2. copper bearing steel production technology according to claim 1, it is characterised in that in the step（1）In, gained molten iron
The weight/mass percentage composition of component is：2.0%~3.4% Si, 3.6%~4.6% C, balance of Fe.
3. copper bearing steel production technology according to claim 1, it is characterised in that in the step（3）In, the cupric of addition
Mineral are by the copper-bearing mineral of pre-reduction treatment；
It is described to be the step of carry out pre-reduction treatment to copper-bearing mineral：（3.1）Copper-bearing mineral is mixed with reducing agent, gained mixing
The particle diameter of thing is 20mm~150mm；（3.2）Gained mixture is calcined at 550 DEG C~750 DEG C；In the step（3.1）
In, the reducing agent is carbon containing material.
4. copper bearing steel production technology according to claim 3, it is characterised in that in the step（3.1）In, the reduction
Agent be carbon dust, graphite and coal in one or several.
5. copper bearing steel production technology according to claim 3, it is characterised in that in the step（3.1）In, the reduction
Carbon containing quality is 3%~15% of copper mass in copper-bearing mineral in agent.
6. copper bearing steel production technology according to claim 3, it is characterised in that in the step（3.2）In, the cupric
Mineral are calcined 1~4h with the mixture of reducing agent at 600 DEG C~700 DEG C.
7. copper bearing steel production technology according to claim 1, it is characterised in that in the step（4）In, to copper-bearing mineral
It is 10~20 DEG C/min with the blend heated heating rate of molten iron.
8. copper bearing steel production technology according to claim 1, it is characterised in that in the step（4）In, copper-bearing mineral with
The mixture of molten iron keeps 8~15min at 1400 DEG C~1600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846114.2A CN106811571A (en) | 2015-11-30 | 2015-11-30 | Copper bearing steel production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846114.2A CN106811571A (en) | 2015-11-30 | 2015-11-30 | Copper bearing steel production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106811571A true CN106811571A (en) | 2017-06-09 |
Family
ID=59102816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510846114.2A Pending CN106811571A (en) | 2015-11-30 | 2015-11-30 | Copper bearing steel production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106811571A (en) |
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2015
- 2015-11-30 CN CN201510846114.2A patent/CN106811571A/en active Pending
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Application publication date: 20170609 |