CN106811667A - Production technology containing nickel steel - Google Patents
Production technology containing nickel steel Download PDFInfo
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- CN106811667A CN106811667A CN201510847301.2A CN201510847301A CN106811667A CN 106811667 A CN106811667 A CN 106811667A CN 201510847301 A CN201510847301 A CN 201510847301A CN 106811667 A CN106811667 A CN 106811667A
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- nickel
- molten iron
- production technology
- steel
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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 production technology containing nickel steel, the molten iron that preparation temperature in blast furnace is 1400 DEG C~1520 DEG C is included in, shifts molten iron in converter or electric furnace, to nickel-containing mineral is added in converter or electric furnace, it is contacted with molten iron；Heating nickel-containing mineral and molten iron is smelted to 1400 DEG C~1600 DEG C.The present invention fully optimizes traditional production technology containing nickel steel, smelting and the production process of ferronickel and metallic nickel are saved, dilval and metallic nickel are replaced with nickel-containing ore, while ensureing nickel 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 nickeliferous steel smelting field popularization and application.
Description
Technical field
The present invention relates to a kind of steel alloy smelting process, more particularly to a kind of production technology containing nickel steel.
Background technology
At present, metallic nickel is generally taken seriously in steel smelting production, the especially production of stainless steel and high-grade alloy steel,
The technique that it is smelted is mainly by steel-making（Iron ore → sintering → blast furnace ironmaking → desulfurizing iron → converter（Or electric furnace）→ plus
Enter alloy → to LF stoves or RH or other refining equipments fine setting composition → continuous casting → rolling → finished steel）Converter or electric furnace rank
Duan Jinhang adds alloy treatment, i.e., metallic nickel or dilval are added in converter or electric furnace come composition needed for reaching steel grade,
In this technique, a large amount of metallic nickels or dilval are consumed, and some production technologies containing nickel steel are then directly used and add electrolytic nickel
Entering the mode smelted in converter is carried out, wherein, although electrolytic nickel purity is high, production technology cost is high, also, existing
Have in technique and prepare the in the majority of electrolytic nickel and dilval with using nickel sulfide ore, environment also resulted in production process more serious
Pollution, therefore, for containing nickel steel smelting need from ore source and steel smelting add nickeliferous thing carry out
Study again, while quality containing nickel steel is ensured, optimized production process fully reduces production cost, energy-saving consumption-reducing, and effectively subtract
The discharge of few environmental contaminants.
In the prior art, patent of invention ZL201210300692.2 is disclosed in a kind of converter and contained using low nickel pig iron smelting
The method of nickel steel, belongs to converter steeling technology field.The technical parameter controlled in technique is：Low nickel pig iron proportional quantity is according to low nickel
Actual nickel content and absorptivity 99% in the pig iron are calculated；Furnace charge is configured to：Molten iron, steel scrap and the low nickel pig iron, bessemerize process
In whole converting process oxygen-supplying amount rise 2%-10%.The invention to a certain extent, the steel beneficial to nickel content 0.10 ~ 0.50%
Kind smelt reduces cost, relatively efficiently reduce converter producing when containing nickel steel to the high price alloy resource such as electrolytic nickel or ferronickel according to
Rely, but, the invention only embodies the recycling to the low nickel pig iron and steel scrap in raw material, oxygen blast is still needed in technique, adds lime
Alkali tune degree, is preferably optimized, and makes its cost reduction limitation.
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 production technology containing nickel steel, with what is optimized
Production technology saves a large amount of raw material, while ensureing quality containing nickel steel, the financial cost of production is greatly reduced, and effectively reduce
The discharge of environmental contaminants.
The technical scheme of solve problem of the present invention is：A kind of production technology containing nickel steel, 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 nickel-containing mineral
To step（2）Nickel-containing mineral is added in described converter or electric furnace, it is contacted with molten iron；
（4）Smelt
By step（3）Molten iron heated with nickel-containing 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 nickel, and nickel oxide can be made fully to be reduced to metallic nickel
Further, in the step（3）In, the nickel-containing mineral is the nickel ores containing nickel oxide such as lateritic nickel ore；It is preferred that
Ground, the nickel content of the nickel-containing mineral is 0.3% ~ 3.0%；It is preferred that the particle diameter of the nickel-containing mineral is 20mm ~ 150mm.
Further, in the step（3）In, the nickel-containing mineral of addition is by the nickel-containing mineral of pre-reduction treatment；Institute
Stating the step of carrying out pre-reduction treatment to nickel-containing mineral is：（3.1）Nickel-containing 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 nickel oxide part contained by nickel-containing mineral, partization
Learn key and be 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 fast by reducing agents such as carbon
Speed 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 nickel in nickel-containing mineral in the reducing agent
3%~15%.
Preferably, in the step（3.2）In, the nickel-containing 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 °C/min；Time and the speed that heats up that specific roasting keeps
Rate is determined according to nickel-containing mineral with the granularity of the mixture of reducing agent, for example, particle diameter is preferred for 80mm~150mm with 4h,
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, is with 2h
It is good.
Further, in the step（4）In, it is 10 ~ 20 ° to nickel-containing mineral and the blend heated heating rate of molten iron
C/min。
Further, in the step（4）In, nickel-containing 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 nickel to be restored, thorough with nickel in ensuring nickel-containing mineral
Bottom reduction avoids reaction time long influence quality containing nickel steel 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 slagging agent are adjusted to bits composition needed for adding
It is whole, it is recycled recycling.
Compared with prior art, the beneficial effects of the invention are as follows：Traditional production technology containing nickel steel is fully optimized, is saved
Smelting and the production process of ferronickel and metallic nickel, dilval and metallic nickel are replaced with nickel-containing ore, ensure nickel recovery rate
While, production cost is significantly reduced, production efficiency is improved, economic input is reduced, big content of starting materials has been saved, it is suitable to
In related nickeliferous steel smelting field popularization and application.
Specific embodiment:
Embodiment 1
By prepare nickel content be 0.2% containing nickel steel as a example by, this kind of production technology containing nickel steel 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 lateritic nickel ore stone
To step（2）The lateritic nickel ore stone 400kg that nickel content is 2% is added in described electric furnace, it is fully contacted with molten iron；
（4）Smelt
By step（3）Molten iron heated with lateritic nickel ore stone, be warming up to 1550 DEG C, and 10min are kept at 1550 DEG C.
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 lateritic nickel ore stone particle diameter is 20mm~150mm；
In the step（4）In, it is 15 °C/min to nickel-containing mineral and the blend heated heating rate of molten iron.
In above-mentioned production technology containing nickel steel, stove high temperature is made full use of to melt its lateritic nickel ore stone, and make full use of iron
Property of C, Si composition activity better than nickel in water, it is metallic nickel nickel oxide is reduced sufficiently at high temperature.In above-mentioned smelting
After technique terminates, product can be carried out going deep into working process, can be recycled to smelting residue, for example, according to institute
The need for practicing steel grade, lime and/or slagging agent are adjusted to bits composition needed for adding, and it is recycled recycling.
Above-mentioned production technology containing nickel steel is significantly optimized compared with traditional production technology containing nickel steel, section
About the smelting of ferronickel and production process, dilval is replaced with nickel-containing ore, while ensureing nickel 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 nickel oxide ores raw material, more conducively environmental protection, it is to avoid the discharge of the pollutant such as sulfur-bearing.
Embodiment 2
By prepare nickel content be 0.2% containing nickel steel as a example by, this kind of production craft step containing nickel steel with embodiment 1, unlike,
In the step（3）In, the lateritic nickel ore stone of addition is by the nickel-containing mineral of pre-reduction treatment；It is described that lateritic nickel ore stone is entered
The step of row pre-reduction treatment is：
（3.1）Mix with reducing agent after lateritic nickel ore stone is crushed, the particle diameter that mixture is obtained is 20mm-150mm；
（3.2）Gained mixture is calcined 3h at 650 DEG C；
Wherein, the reducing agent is carbon dust, and carbon containing quality is the 5% of the quality of nickel in nickel-containing mineral in the reducing agent.
In the above-described embodiments, by the pre-reduction treatment to lateritic nickel ore stone, gone back the nickel oxide part contained by it
Former, part chemical bond is in the different degrees of state of activation, so that it is in step（4）In contacted with high temperature liquid iron after by carbon etc.
Reducing agent is quickly reduced, and then beneficial to greatly improving production efficiency.
The above-mentioned gained of production technology containing nickel steel is 0.19% containing nickel content in nickel steel, and nickel recovery rate is 95%.
Embodiment 3
By prepare nickel content be 0.2% containing nickel steel as a example by, this kind of production craft step containing nickel steel with embodiment 1, unlike：
In step（1）In, the molten iron that 4t temperature is 1400 DEG C is obtained in blast furnace；
In step（4）In, by step（3）Lateritic nickel ore stone heated with molten iron, be warming up to 1400 DEG C, and in 1400 DEG C of guarantors
Hold 8min.
In above-described embodiment：
In the step（1）In, the weight/mass percentage composition of the component of gained molten iron is：2.0% Si, 3.6% C, balance of Fe；
In the step（3）In, the lateritic nickel ore stone particle diameter is 40mm~60mm；
In the step（4）In, it is 10 °C/min to nickel-containing mineral and the blend heated heating rate of molten iron.
The above-mentioned gained of production technology containing nickel steel is 0.186% containing nickel content in nickel steel, and nickel recovery rate is 93%.
Claims (5)
1. a kind of production technology containing nickel steel, 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 nickel-containing mineral
To step（2）Nickel-containing mineral is added in described converter or electric furnace；
（4）Smelt
By step（3）Molten iron and nickel-containing mineral carry out being heated to 1400 DEG C~1600 DEG C.
2. production technology containing nickel steel 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. production technology containing nickel steel according to claim 1, it is characterised in that in the step（3）In, it is described containing nickel minerals
Thing is lateritic nickel ore.
4. production technology containing nickel steel according to claim 1, it is characterised in that in the step（3）In, addition it is nickeliferous
Mineral are by the nickel-containing mineral of pre-reduction treatment；It is described to be the step of carry out pre-reduction treatment to nickel-containing mineral：（3.1）To contain
Nickel mineral mixes with reducing agent, and the particle diameter of gained mixture is 20mm~150mm；（3.2）By gained mixture 550 DEG C~
It is calcined at 750 DEG C；In the step（3.1）In, the reducing agent is carbon containing material.
5. production technology containing nickel steel according to claim 4, it is characterised in that in the step（3.1）In, the reduction
Agent be carbon dust, graphite and coal in one or several.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847301.2A CN106811667A (en) | 2015-11-30 | 2015-11-30 | Production technology containing nickel steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847301.2A CN106811667A (en) | 2015-11-30 | 2015-11-30 | Production technology containing nickel steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106811667A true CN106811667A (en) | 2017-06-09 |
Family
ID=59102992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510847301.2A Pending CN106811667A (en) | 2015-11-30 | 2015-11-30 | Production technology containing nickel steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106811667A (en) |
-
2015
- 2015-11-30 CN CN201510847301.2A patent/CN106811667A/en active Pending
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |
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| WD01 | Invention patent application deemed withdrawn after publication |