CN101886231B - Method for manufacturing nickel iron alloy - Google Patents
Method for manufacturing nickel iron alloy Download PDFInfo
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- CN101886231B CN101886231B CN2010102136031A CN201010213603A CN101886231B CN 101886231 B CN101886231 B CN 101886231B CN 2010102136031 A CN2010102136031 A CN 2010102136031A CN 201010213603 A CN201010213603 A CN 201010213603A CN 101886231 B CN101886231 B CN 101886231B
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Abstract
The invention discloses a method for manufacturing a nickel iron alloy. The main technology comprises the steps of: mixing oxidized nickel ore, a carbon reducing agent and limestone according to a certain proportion; adding the mixture into a rotary kiln for reducing and roasting to obtain roasted ore; crushing the roasted ore and adding the crushed ore into a magnetic separator for magnetic separation; mixing nickel iron concentrate obtained by the magnetic separation, the carbon reducing agent, lime and fluorite according to a certain proportion; adding the mixture into an electric arc furnace (or medium frequency induction furnace) for smelting and blowing oxygen to a molten pool for refining to obtain a liquid-state refined nickel iron alloy; and discharging the liquid-state refined nickel iron alloy and casting the liquid-state alloy into an alloy block. The nickel iron alloy manufactured by the method has the advantages of low amount of slag, low power consumption, small investment and low cost compared with the foreign conventional method, and high product quality compared with the domestic blast furnace method and electric arc furnaces, wherein the melting power consumption is only one third of that of the foreign conventional method and the domestic electric arc furnace method for producing the nickel iron alloy; and the nickel iron alloy is superior high-grade (containing 10 to 45 percent of Ni) refined nickel iron alloy, meets the production requirements of various series of stainless steel and has good economic benefit.
Description
Technical field: the present invention relates to a kind of special iron alloy, particularly relating to the nickel oxide ore is the method for manufacture of a kind of Rhometal of raw material.
Background technology: Rhometal is an alloying constituent of producing stainless steel, high temperature steel, structural alloy steel.With the nickel oxide ore is the raw material production Rhometal, and thermal process mainly contains: external traditional method, domestic blast furnace process and ore deposit heat furnace method, external traditional method; Nickel oxide ore is earlier obtained the nickel slag through rotary kiln baking, and it is even that nickel slag and coke powder, flux are pressed the proportioning mixed, goes into mine heat furnace smelting; The raw ferro nickel that obtains is gone into refining furnace (electric furnace, top blown converter or induction furnace, top blown converter) refining, remove impurity carbon, silicon, phosphorus, sulphur etc., obtain refining Rhometal product; This method investment is big, and technical process is long, and floor space is many; Slag amount is big, melting electric consumption high (550～760kwh/t ore deposit), and production cost is high; Domestic blast furnace process is a raw material with the nickel oxide ore, is reductive agent with the coke, is flux with the Wingdale, and after the weighing of proportioning ratio, go in the blast furnace and smelt, product can only be produced the ferronickel that contains Ni＜8%, and foreign matter content is high; Domestic ore deposit heat furnace method, nickel oxide ore is allocated carbonaceous reducing agent (coke powder, coal dust) and lime in the proportioning ratio behind drying, sintering; Go in the hot stove in ore deposit to smelt, what obtain is raw ferro nickel, contains Ni＜15%; And foreign matter contents such as carbon, silicon, phosphorus, sulphur are high, need raw ferro nickel be delivered to and carry out refining in electric arc furnace or the medium-frequency induction furnace, just can obtain refining ferronickel; This method slag amount is big, melting electric consumption high (6500～7300kwh/t ferronickel).
Summary of the invention: the purpose of invention, providing a kind of is the method for manufacture of the Rhometal of raw material with the nickel oxide ore, and this method is made in the Rhometal process, and slag amount is few; Melting electric consumption is low, has realized energy-saving and emission-reduction, and this method and external traditional method specific investment are few; Technical process is short, and cost is low, with domestic blast furnace process and ore deposit heat furnace method ratio; Primary smelting has produced the refining Rhometal of high-quality higher-grade, has satisfied the needs of each serial high-quality Stainless Steel Production, and good economic benefit and social benefit are arranged.
To achieve these goals, the present invention takes following technology, nickel oxide ore, carbonaceous reducing agent coal dust or coke powder, Wingdale is weighed (weight percent) in the proportioning ratio, after mixing; Join in the rotary kiln and dewater, give reduction, roasting, after the roasted ore fragmentation of the kiln discharge that roasting is good, join and carry out magnetic separation in the magnetic separator; Gangue is removed through magnetic separation, is obtained the ferronickel concentrate, with ferronickel concentrate, carbonaceous reducing agent coal dust or coke powder, lime, fluorite in proportioning ratio weigh (weight percent); After mixing, add in the electric arc furnace or smelt in the medium-frequency induction furnace, after material is gone into stove; Discharge electrode under the energising heating, electric arc furnace earlier, energising heating again, reduction, fusing; After treating the material fine melt, carry out refining, just obtain the liquid refining Rhometal of high-quality higher-grade to bath lancing; Go out it in hot metal ladle, be injected in the ingot mould, be cast into alloy block through hot metal ladle.
Of the present invention is a kind of Rhometal method of manufacture of raw material with the nickel oxide ore, adopts this method to make in the Rhometal process, and slag amount is few, melting electric consumption low (1200～2600kwh/t ferronickel); Be merely 1/3 of external traditional method and domestic ore deposit heat furnace method power consumption, realized energy-saving and emission-reduction, with external traditional method ratio; Less investment, technical process is short, and production cost is low; With domestic blast furnace process and ore deposit heat furnace method ratio, quality product is high, and primary smelting has produced high-quality (P＜0.045%; S＜0.045%) the refining Rhometal of higher-grade (containing Ni10%～45%) has satisfied each serial high-quality Stainless Steel Production needs, has good economic benefit and social benefit.
Embodiment: the raw material that the present invention uses has nickel oxide ore, Wingdale, lime, fluorite, under high temperature action, produces following principal reaction:
NiO+C＝Ni+CO↑
FeO+C＝Fe+CO↑
Wingdale, lime, fluorite are flux.
Raw material and main chemical compositions thereof that the present invention uses, (weight percent)
Nickel oxide ore contains Ni1.2%～4.1%, granularity＜8mm
Carbonaceous reducing agent coal dust or coke powder contain fixed carbon 76%～88%, granularity＜8mm
Wingdale contains CaO＞51.5%, granularity＜8mm
Lime contains CaO 80%～96%, granularity＜38mm
Fluorite contains CaF
280%～90%, granularity＜38mm
The major equipment that uses has rotary kiln, magnetic separator, electric arc furnace or medium-frequency induction furnace.
ME and proportioning raw materials thereof with above-mentioned raw materials, are pressed nickel oxide ore 83.5%～90%, carbonaceous reducing agent coal dust or coke powder 4.5%～7.8%; Wingdale 5.5%～8.7% proportioning ratio is weighed (weight percent), after mixing, joins in the rotary kiln and dewaters, gives reduction, roasting, and kiln temperature is controlled at 780 ℃～1410 ℃; After the roasted ore fragmentation of the kiln discharge that roasting is good, join and carry out magnetic separation in the magnetic separator, gangue is removed through magnetic separation; Obtain the ferronickel concentrate, press ferronickel concentrate 84.51%～90.30%, carbonaceous reducing agent coal dust or coke powder 2.88%～5.93%, lime 5.12%～7.21%, fluorite 1.70%～2.35% proportioning ratio weigh (weight percent); After mixing, add in the electric arc furnace or smelt in the medium-frequency induction furnace, after material is gone into stove; Discharge electrode under the energising heating, electric arc furnace earlier, energising heating again, reduction, fusing; After treating thing section fine melt, to the bath lancing refining, oxygen blast pressure is 0.5～1.0Mpa; Oxygen blow duration is 6～32 minutes, and smelting temperature is 1520 ℃～1680 ℃, has just obtained the liquid refining Rhometal of high-quality higher-grade; It is gone out in hot metal ladle, be injected in the ingot mould, be cast into the Rhometal piece of every 20kg through hot metal ladle; Every stove tap to tap time is 1 hour 15 minutes～3 hours 50 minutes, and melting electric consumption is 1200～2600kw.h/t ferronickel, and nickel recovery is 90～96%.
The Rhometal chemical ingredients of making (weight percent) is Ni10%～45%, P 0.01%～0.045%, S 0.01%～0.045%, C 0.02%～0.5%, Si 0.02%～0.6%, Cr 0.03%～0.8%, and surplus is an iron.
Embodiment:
Example 1: according to the requirement of product alloy composition, prepare burden nickel oxide ore, coal dust, Wingdale, ratio of components (weight percent) is a nickel oxide ore 87.31%, coal dust 4.83%, Wingdale 7.86%; The mixing of materials for preparing evenly after, join in the rotary kiln dewater, 780 ℃～1410 ℃ of prereduction, maturing temperature control, after the roasted ore fragmentation of the kiln discharge that roasting is good, join magnetic separator and carry out magnetic separation; Remove gangue through magnetic separation, obtain the ferronickel concentrate, prepare burden ferronickel concentrate, coal dust, lime, fluorite, ratio of components (weight percent) is ferronickel concentrate 88.49%, coal dust 3.13%, lime 6.43%, fluorite 1.95%; The mixing of materials for preparing evenly after, join in the electric arc furnace and smelt, after material is gone into stove, following discharge electrode; Energising heating, reduction, fusing, treat the material fine melt after, carry out refining to bath lancing, remove impurity such as carbon elimination, silicon; Oxygen blast pressure is 0.7Mpa, and oxygen blow duration is 13 minutes, and smelting temperature is 1520 ℃～1680 ℃; Just obtain the liquid refining Rhometal of high-quality higher-grade, it is gone out in hot metal ladle, be injected in the ingot mould through hot metal ladle; Be cast into every 20kg alloy block, be 1 hour 48 minutes tap to tap time, and melting electric consumption is the 1358kwh/t ferronickel; Slag goes out in cinder ladle, through shrend, makes material of construction.Nickel recovery is 93.8%.
The above-mentioned refining Rhometal of making, through assay, its chemical ingredients (weight percent) is Ni 32.15%, C 0.045%, Si0.05%, P 0.015%, and S 0.013%, and Cr 0.056%, and surplus is an iron.
Example 2: according to the requirement of product alloying constituent, prepare burden nickel oxide ore, coal dust, Wingdale, ratio of components (weight percent) be nickel oxide ore 86.21%, coal dust 5.6%, Wingdale 8.19%, the mixing of materials for preparing even after; Join in the rotary kiln and dewater, give reduction, roasting, temperature is controlled at 780 ℃～1410 ℃, after the roasted ore fragmentation of the kiln discharge that roasting is good, joins magnetic separator and carries out magnetic separation; Remove gangue through magnetic separation, obtain the ferronickel concentrate, prepare burden ferronickel concentrate, coke powder, lime, fluorite, ratio of components (weight percent) is a ferronickel concentrate 87.59%; Coke powder 4.02%, lime 6.42%, fluorite 1.97%, the mixing of materials for preparing evenly after, join in the medium-frequency induction furnace and smelt, after material is gone into stove; Energising heating, reduction, fusing, treat the material running down after, carry out refining, remove impurity such as carbon elimination, silicon to bath lancing; Oxygen blast pressure is 0.6Mpa, and oxygen blow duration is 8 minutes, and smelting temperature is 1520 ℃～1680 ℃; Just obtain the liquid refining Rhometal of high-quality higher-grade, it is gone out in hot metal ladle, be injected in the ingot mould through hot metal ladle; Be cast into the 20kg alloy block, be 1 hour 20 minutes tap to tap time, and melting electric consumption is the 1291kwh/t ferronickel; Slag goes out in cinder ladle, makes material of construction through shrend, and nickel recovery is 92.6%.
The above-mentioned refining Rhometal of making, through assay, its chemical ingredients (weight percent) is Ni 21.53%, and C 0.068%, and Si 0.073%, and P 0.018%, and S 0.016%, Cr0.11%, surplus is an iron.
Claims (1)
1. the method for manufacture of a Rhometal is characterized in that the raw material and the proportioning thereof of ME and use:
Raw material and the main chemical compositions (weight percent) thereof used
Nickel oxide ore contains Ni 1.2%～4.1%, granularity＜8mm
Carbonaceous reducing agent coal dust or coke powder contain fixed carbon 76%～88%, granularity＜8mm
Wingdale contains CaO＞51.5%, granularity＜8mm
Lime contains CaO 80%～96%, granularity＜38mm
Fluorite contains CaF
280%～95%, granularity＜38mm
ME and proportioning raw materials thereof are with above-mentioned raw materials, in nickel oxide ore 83.5%～90%, carbonaceous reducing agent coal dust or coke powder 4.5%～7.8%, Wingdale 5.5%～8.7% proportioning ratio weigh (weight percent); After mixing, join in the rotary kiln dewater, prereduction, roasting, kiln temperature is controlled at 780 ℃～1410 ℃; After the roasted ore fragmentation of the kiln discharge that roasting is good, join and carry out magnetic separation in the magnetic separator, gangue is removed through magnetic separation; Obtain the ferronickel concentrate, weigh (weight percent) in ferronickel concentrate 84.51%～90.30%, carbonaceous reducing agent coal dust or coke powder 2.88%～5.93%, lime 5.12%～7.21%, fluorite 1.70%～2.35% proportioning ratio, after mixing; Add in the electric arc furnace or smelt in the medium-frequency induction furnace, after material is gone into stove, the energising heating; Electric arc furnace is discharge electrode earlier down, energising heating again, reduction, fusing, treat the material fine melt after; Carry out refining to bath lancing, oxygen blast pressure is 0.5～1.0MPa, and oxygen blow duration is 6～32 minutes; Smelting temperature is 1520 ℃～1680 ℃, just obtains the liquid refining Rhometal of high-quality higher-grade, and it is gone out in hot metal ladle; Be injected in the ingot mould through hot metal ladle, be cast into the Rhometal piece of every 20Kg, every stove tap to tap time is 1 hour 15 minutes～3 hours 50 minutes; Melting electric consumption is 1200～2600kwh/t ferronickel, and nickel recovery is 90%～96%.
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| CN2010102136031A CN101886231B (en) | 2010-06-30 | 2010-06-30 | Method for manufacturing nickel iron alloy |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201400624A (en) * | 2012-06-28 | 2014-01-01 | Yieh United Steel Corp | Method for producing austenitic stainless steel with nickel and chromium ore |
| WO2015015468A1 (en) * | 2013-08-02 | 2015-02-05 | Louis Johannes Fourie | A ferronickel product and a process for its production |
| CN103725994B (en) * | 2013-12-16 | 2016-06-08 | 泰州俊宇不锈钢材料有限公司 | A kind of High-performance martensitic steel wire and manufacture method thereof |
| CN105132798A (en) * | 2015-08-21 | 2015-12-09 | 苏州莱特复合材料有限公司 | Ferro-nickel alloy material and preparing method thereof |
| CN110527783B (en) * | 2019-10-14 | 2021-05-28 | 江苏江南铁合金有限公司 | Process for improving nickel yield in nickel iron production |
| CN113492151B (en) * | 2021-07-16 | 2023-03-17 | 山西太钢不锈钢股份有限公司 | Manufacturing method of iron-nickel-based alloy hot-rolled coil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063185A (en) * | 2006-04-24 | 2007-10-31 | 刘光火 | Nickel-ferrum smelting technique for nickel oxide ore by submerged arc furnace |
| CN101418356A (en) * | 2007-10-28 | 2009-04-29 | 沾化庆翔金属材料有限公司 | A kind of from nickel oxide ore the method for refining ferronickel alloy |
| CN101463403A (en) * | 2009-01-16 | 2009-06-24 | 洮南市金升冶金产品有限公司 | Nickel iron smelting technique by laterite nickel ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1970807A (en) * | 2006-12-05 | 2007-05-30 | 上海成富经济发展有限公司 | Process for electrosmelting ferronickel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063185A (en) * | 2006-04-24 | 2007-10-31 | 刘光火 | Nickel-ferrum smelting technique for nickel oxide ore by submerged arc furnace |
| CN101418356A (en) * | 2007-10-28 | 2009-04-29 | 沾化庆翔金属材料有限公司 | A kind of from nickel oxide ore the method for refining ferronickel alloy |
| CN101463403A (en) * | 2009-01-16 | 2009-06-24 | 洮南市金升冶金产品有限公司 | Nickel iron smelting technique by laterite nickel ore |
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