CN105986120A - Electric heating furnace smelting process - Google Patents
Electric heating furnace smelting process Download PDFInfo
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- CN105986120A CN105986120A CN201510084747.4A CN201510084747A CN105986120A CN 105986120 A CN105986120 A CN 105986120A CN 201510084747 A CN201510084747 A CN 201510084747A CN 105986120 A CN105986120 A CN 105986120A
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- reduction
- smelting process
- electric heating
- furnace
- heating furnace
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Abstract
The invention discloses an electric heating furnace smelting process in the nickel iron production field. The electric heating furnace smelting process comprises the steps of: 1) drying, 2) roasting reduction, 3) smelting by an ore-smelting electric furnace, 4) injection refining, and 5) pelletization packing. The electric heating furnace smelting process adopts two 72000 kVA rectangular alternating-current furnace to smelt; six self-baking electrodes with diameters of 1400 mm are linearly arranged; the slag line area reaches 288 m2; the electric furnace operation adopts a high-voltage and current mode; the side wall slag line part is cooled by a copper water jacket; the service life of an electric furnace is prolonged; the production efficiency is improved; the discharge of pollutants is reduced; the energy consumption and the cost are reduced; and the electric heating furnace smelting process can be applied to the nickel iron production.
Description
Technical field
The present invention relates to a kind of ferronickel production technology, particularly to a kind of electrothermal stove smelting process.
Background technology
Nickel is as the main alloying elements of smelting stainless steel, thus it is possible to vary stainless organizational structure, from
And improve stainless corrosion resistance, plasticity, toughness and welding performance.But the increasing along with stainless steel output
Greatly, nickel supply day is becoming tight, and causes the price continuous rise of nickel, in the urgent need to seeking nickel succedaneum.
Ferronickel can replace nickel, alleviates the anxiety of nickel supply, reduces stainless production cost.
Nickel resources in the earth's crust is mainly nickel sulfide ore and lateritic nickel ore, and wherein lateritic nickel ore resource accounts for 72%,
Nickel average grade (mass fraction of nickel) can reach 1.28%, is mainly distributed on south, the tropic of cancer one
Band.China's nickel resources is the most not enough, is mainly distributed on Gansu, Yunnan, Xinjiang, Jilin, Sichuan and lake
The ground such as north, in addition to Jinchuan, mostly are small-sized lean ore.
The nickel ore resource that China has now been found that is very limited, is difficult to meet the need that domestic rustless steel quickly produces
, therefore research and utilization foreign resources are the most necessary.China YouSe group and the limited public affairs of Taiyuan steel enterprise
Take charge of the annual output 8.5 ten thousand t Burma Da Gong mountain nickel minerals project of joint investment in overseas, be that current domestic enterprise exists
The maximum lateritic nickel ore engineering of oversea exploitation.
The method of laterite nickel ore and producing ferronickel has hydrometallurgy and a pyrometallurgy, but the rule that technics comparing is ripe
Modelling produces still based on pyrometallurgy.Main ferronickel production technology is blast furnace process and electric furnace smelting,
But blast furnace process is seriously polluted, energy consumption is higher, it is low-grade that country prohibited blast fumance in 2007
Ferronickel.
Summary of the invention
It is an object of the invention to provide a kind of electrothermal stove smelting process, its energy consumption is low, and production efficiency is high, dirty
Contaminate low.
The object of the present invention is achieved like this: a kind of electrothermal stove smelting process, comprises the following steps:
1) it is dried；Before melting, first lateritic nickel ore raw material and coal dust are added rotary kiln carry out dehydrate
And prereduction, it is dried and prereduction is carried out respectively in two frame rotary kilns；
2) roasting reduction；Roasting reduction uses two rotary kilns, dried furnace charge and reduction coal dust is led to
Cross adhesive tape conveyor and add in rotary kiln, directly reduction coal dust is joined the high-temperature region of rotary kiln, roasting
Reduction temperature general control is between 780～830 DEG C；
3) ore-smelting electric furnace melting；Use two 72000kVA rectangle exchange ore-smelting electric furnaces to carry out hiding arc to melt
Refining, the self-baking electrode linear pattern of a diameter of 1400mm of the six roots of sensation, slag line area reaches 288m2；
4) spray refining；According to the composition of thick ferronickel, carry out blowing powder, spray oxygen liter an operative position
Temperature, skim etc. operates, and carries out the operations such as desulfurization, desiliconization, decarburization, dephosphorization, refining cycle selectively
For about 130min.
As a further improvement on the present invention, described dry run also includes pre-reduction, prereduction
In journey in addition to removing water of crystallization further, at high temperature part of nickel, iron oxides can be carried out pre-going back
Former, typically furnace charge kiln discharge temperature is controlled at 650～900 DEG C.
Compared with prior art, the beneficial effects of the present invention is, the present invention uses two 72000kVA
Rectangle ac electric arc furnace carries out melting, the self-baking electrode linear pattern of a diameter of 1400mm of the six roots of sensation, slag line
Area reaches 288m2, furnace operation uses high voltage, current-mode, and side wall slag line part uses Copper Water Jacket
Cooling, improves the electric furnace life-span.In order to be met the qualified ferronickel raw material needed for rustless steel produces, there is choosing
Carry out desulfurization, desiliconization, decarburization and dephosphorization with selecting, use nickel iron refining new technology that thick ferronickel molten metal is entered
Row winding-up and heating up, thus improves production efficiency, reduces the discharge of pollutant, reduce energy consumption and
Cost.The present invention can be used in ferronickel production.
Detailed description of the invention
A kind of electrothermal stove smelting process, comprises the following steps:
1) it is dried；Before melting, first lateritic nickel ore raw material and coal dust are added rotary kiln carry out dehydrate
And prereduction, it being dried and prereduction is carried out respectively in two frame rotary kilns, dry run also includes prereduction
Process, in pre-reduction in addition to removing water of crystallization further, can be at high temperature by part of nickel, ferrum
Oxide carries out prereduction, typically controls furnace charge kiln discharge temperature at 650～900 DEG C；
2) roasting reduction；Roasting reduction uses two rotary kilns, dried furnace charge and reduction coal dust is led to
Cross adhesive tape conveyor and add in rotary kiln, directly reduction coal dust is joined the high-temperature region of rotary kiln, roasting
Reduction temperature general control is between 780～830 DEG C；
3) ore-smelting electric furnace melting；Use two 72000kVA rectangle exchange ore-smelting electric furnaces to carry out hiding arc to melt
Refining, the self-baking electrode linear pattern of a diameter of 1400mm of the six roots of sensation, slag line area reaches 288m2；
4) spray refining；According to the composition of thick ferronickel, carry out blowing powder, spray oxygen liter an operative position
Temperature, skim etc. operates, and carries out the operations such as desulfurization, desiliconization, decarburization, dephosphorization, refining cycle selectively
For about 130min.
The present invention uses two 72000kVA rectangle ac electric arc furnaces to carry out melting, a diameter of 1400mm of the six roots of sensation
Self-baking electrode linear pattern, slag line area reaches 288m2, furnace operation uses high voltage, current-mode
Formula, side wall slag line part uses Copper Water Jacket cooling, improves the electric furnace life-span.Raw in order to be met rustless steel
Qualified ferronickel raw material needed for product, carries out desulfurization, desiliconization, decarburization and dephosphorization selectively, uses ferronickel
Thick ferronickel molten metal is jetted and heats up by novel process for refining, thus improves production efficiency, reduces
The discharge of pollutant, reduces energy consumption and cost.
Those skilled in the art is at the bar of the spirit and scope of the present invention determined without departing from claims
Under part, it is also possible to above content is carried out various amendment.Therefore the scope of the present invention not only limiting
In above explanation, but determined by the scope of claims.
Claims (2)
1. an electrothermal stove smelting process, comprises the following steps:
1) it is dried；Before melting, first lateritic nickel ore raw material and coal dust are added rotary kiln carry out dehydrate
And prereduction, it is dried and prereduction is carried out respectively in two frame rotary kilns；
2) roasting reduction；Roasting reduction uses two rotary kilns, dried furnace charge and reduction coal dust is led to
Cross adhesive tape conveyor and add in rotary kiln, directly reduction coal dust is joined the high-temperature region of rotary kiln, roasting
Reduction temperature general control is between 780～830 DEG C；
3) ore-smelting electric furnace melting；Use two 72000kVA rectangle exchange ore-smelting electric furnaces to carry out hiding arc to melt
Refining, the self-baking electrode linear pattern of a diameter of 1400mm of the six roots of sensation, slag line area reaches 288m2；
4) spray refining；According to the composition of thick ferronickel, carry out blowing powder, spray oxygen liter an operative position
Temperature, skim etc. operates, and carries out the operations such as desulfurization, desiliconization, decarburization, dephosphorization, refining cycle selectively
For about 130min；
5) granulation packaging；Granular product after spray refining is packed through sack filling machine.
A kind of electrothermal stove smelting process the most according to claim 1, it is characterised in that described dry
Process also includes pre-reduction, in pre-reduction in addition to removing water of crystallization further, and can be at height
Under temperature, part of nickel, iron oxides are carried out prereduction, typically furnace charge kiln discharge temperature is controlled
650～900 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510084747.4A CN105986120A (en) | 2015-02-12 | 2015-02-12 | Electric heating furnace smelting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510084747.4A CN105986120A (en) | 2015-02-12 | 2015-02-12 | Electric heating furnace smelting process |
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| Publication Number | Publication Date |
|---|---|
| CN105986120A true CN105986120A (en) | 2016-10-05 |
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| CN201510084747.4A Pending CN105986120A (en) | 2015-02-12 | 2015-02-12 | Electric heating furnace smelting process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245643A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit and lateritic nickel ore preprocess method |
-
2015
- 2015-02-12 CN CN201510084747.4A patent/CN105986120A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245643A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit and lateritic nickel ore preprocess method |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |