CN101418356A - A kind of from nickel oxide ore the method for refining ferronickel alloy - Google Patents
A kind of from nickel oxide ore the method for refining ferronickel alloy Download PDFInfo
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- CN101418356A CN101418356A CNA2007101134817A CN200710113481A CN101418356A CN 101418356 A CN101418356 A CN 101418356A CN A2007101134817 A CNA2007101134817 A CN A2007101134817A CN 200710113481 A CN200710113481 A CN 200710113481A CN 101418356 A CN101418356 A CN 101418356A
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Abstract
The invention provides a kind of from nickel oxide ore the method for refining ferronickel alloy, with nickel oxide ores drying, screening, fragmentation, make breeze, after breeze, coke fines, unslaked lime are baking mixed, Water Quenching, make it form the ferronickel slag, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250, makes the ferronickel slag have certain magnetic; Regrind into ferronickel ground-slag end; Magnetic separation is carried out at ferronickel ground-slag end; Make high-strength nickel iron ball group after the magnetic separation; Send in the blast furnace again and smelt, form Rhometal liquid.The method of this refining ferronickel alloy, the ferronickel slag becomes Z 250 and has certain magnetic along with ferric oxide, can the ferronickel slag be separated with impurity such as non-magnetic silicon-dioxide, aluminium sesquioxides through magnetic separation, become nickel ore concentrate, reduced the load of subsequent disposal, thereby reduced energy consumption and discharging wastes, improved energy-conservation and environment protecting.Also technical scheme of the present invention can be used for nickel minerals exploitation field.
Description
Technical field
The invention provides a kind of process for extracting of Rhometal, especially a kind of from nickel oxide ore the method for refining ferronickel alloy.
Background technology
Nickel has excellent mechanical intensity and ductility, good high-temperature stability, very high chemical stability, and in air characteristic such as not oxidation, be a kind of crucial non-ferrous metal raw material.The main source of nickel is nickeliferous two kinds of mineral, i.e. nickel sulfide ore and nickel oxide ore.Because nickel content is generally 1.5～2.5% in the nickel oxide ore, iron level is 10～20%, and full water-content is about 30～35%, thus the effective constituent in the nickel minerals be nickel and iron sum less than 20%, and moisture and impurity are up to more than 80%.The method of refining ferronickel mainly contains two kinds from nickel oxide ore at present, i.e. wet method and pyrogenic process.Wet method has two kinds of pickling process and ammonia leaching processes; Pyrogenic process has blast-furnace smelting, mine heat furnace smelting, refining furnace to smelt three kinds.The main drawback of wet method is the cost of investment height, and water loss is big in the production, and waste water is difficult to handle; The production efficiency of hot stove of pyrometallurgical smelting chats and refining furnace is low, and consumes power is big, and is uneconomical except that the area of water power prosperity.The enterprise of domestic smelting ferronickel adopts blast-furnace smelting mostly.Blast-furnace smelting factory with raw ore add lime, coke carries out sintering, forms agglomerate, join in the blast furnace with coke, Wingdale, fluorite then and smelt.The one, because the foreign matter content height, the ratio of unit ferronickel production consumption coke and electric energy is all very high in the smelting; The 2nd, because it is the excessive and unusual thickness of the quantity of slag in smelting needs to add the flowability that fluorite increases slag, therefore very big to the influence of environment.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of from nickel oxide ore the method for refining ferronickel alloy, to improve the energy-conservation and environment protecting that refines.
The present invention be achieved in that a kind of from nickel oxide ore the method for refining ferronickel alloy, described method is,
A, with nickel oxide ores drying, screening, fragmentation, make that granularity is not more than 15mm, moisture is not more than 12% breeze, by weight, with breeze: the proportioning of coke fines: unslaked lime=100:3.5～4.5:4.5～5.5 is even with three kinds of mixing of materials, send into and use the coal gas roasting in the rotary kiln, under 830 ℃～870 ℃ of temperature, roasting 25～35 minutes, carry out Water Quenching then, make above-mentioned three kinds of materials form the ferronickel slag, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250, makes the ferronickel slag have certain magnetic;
B puts into ball mill and rod mill successively with above-mentioned ferronickel slag, wears into less than 320 purpose ferronickel ground-slag ends;
C makes above-mentioned ferronickel ground-slag end by intensity magnetic separator, and ferronickel with magnetic that still is in the state of oxidation in the ferronickel ground-slag end and impurity such as non-magnetic silicon-dioxide, aluminium sesquioxide are separated, must selected ferronickel ground-slag end;
D, by weight, with selected ferronickel ground-slag end: the proportioning of coke fines: wilkinite: water=100:4.5～5.5:4.5～5.5:2.5～3.5 is even with four kinds of mixing of materials, put into balling disc, make it to form the pelletizing that diameter is not more than 15mm, send in rotary kiln or the shaft furnace, roasting is 25～35 minutes under 1100～1300 ℃ of high temperature, makes high-strength nickel iron ball group;
E, by weight, with high-strength nickel iron ball group: the proportioning of coke: Wingdale=100:4.5～5.5:2.5～3.5, three kinds of materials are put into blast furnace to be smelted, form Rhometal liquid, pour into the Rhometal ingot at last or Rhometal liquid is directly injected the AOD stove and further be refined into the Rhometal product.
The method of this refining ferronickel alloy, make the nickel in the nickel oxide ore have certain magnetic by roasting along with ferric oxide becomes Z 250, can the ferronickel slag be separated with impurity such as non-magnetic silicon-dioxide, aluminium sesquioxides through magnetic separation, become nickel ore concentrate, reduced the load of subsequent disposal, thereby reduced energy consumption and discharging wastes, improved energy-conservation and environment protecting.Technical scheme of the present invention is used for nickel minerals exploitation field, takes out, also can obtain good social benefit and economic benefit making the ferronickel pelletizing after the nickel minerals roasting magnetization.
Embodiment
Further specify the present invention below.
After roasting, the Water Quenching, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250.Because the nickel in the nickel oxide ore is to be embedded in the intracell of iron with atomic condition, so along with ferric oxide is reduced to Z 250 and makes the ferronickel slag have certain magnetic.
Breeze, coke fines, these three kinds of mixing of materials of unslaked lime is even, when sending in the rotary kiln roasting, can adopt gas-fired to finish.
When ferronickel pelletizing, coke, Wingdale were put into blast furnace and smelted, processing condition such as furnace temperature, tap to tap time were identical with existing blast-furnace smelting.
Described Water Quenching is a prior art, no longer describes in detail.
Embodiment 1
A, with nickel oxide ores drying, screening, fragmentation, make that granularity is not more than 15mm, moisture is not more than 12% breeze, by weight, with breeze: the proportioning of coke fines: unslaked lime=100:3.5:4.5 is even with three kinds of mixing of materials, send into and use the coal gas roasting in the rotary kiln, under 850 ℃ of temperature, roasting 25 minutes, carry out Water Quenching then, make above-mentioned three kinds of materials form the ferronickel slag, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250, makes the ferronickel slag have certain magnetic;
B puts into ball mill and rod mill successively with above-mentioned ferronickel slag, wears into less than 320 purpose ferronickel ground-slag ends;
C makes above-mentioned ferronickel ground-slag end by intensity magnetic separator, and ferronickel with magnetic that still is in the state of oxidation in the ferronickel ground-slag end and impurity such as non-magnetic silicon-dioxide, aluminium sesquioxide are separated, must selected ferronickel ground-slag end;
D, by weight, with selected ferronickel ground-slag end: the proportioning of coke fines: wilkinite: water=100:4.5:4.5:2.5 is even with four kinds of mixing of materials, put into balling disc, make it to form the pelletizing that diameter is not more than 15mm, send in the rotary kiln, roasting is 25 minutes under 1100 ℃ of high temperature, makes high-strength nickel iron ball group;
E, by weight, with high-strength nickel iron ball group: the proportioning of coke: Wingdale=100:4.5:2.5, three kinds of materials are put into blast furnace smelt, form Rhometal liquid, pour into the Rhometal ingot at last.
Embodiment 2
A, with nickel oxide ores drying, screening, fragmentation, make that granularity is not more than 15mm, moisture is not more than 12% breeze, by weight, with breeze: the proportioning of coke fines: unslaked lime=100:4.5:5.5 is even with three kinds of mixing of materials, send into and use the coal gas roasting in the rotary kiln, under 870 ℃ of temperature, roasting 35 minutes, carry out Water Quenching then, make above-mentioned three kinds of materials form the ferronickel slag, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250, makes the ferronickel slag have certain magnetic;
B puts into ball mill and rod mill successively with above-mentioned ferronickel slag, wears into less than 320 purpose ferronickel ground-slag ends;
C makes above-mentioned ferronickel ground-slag end by intensity magnetic separator, and ferronickel with magnetic that still is in the state of oxidation in the ferronickel ground-slag end and impurity such as non-magnetic silicon-dioxide, aluminium sesquioxide are separated, must selected ferronickel ground-slag end;
D, by weight, with selected ferronickel ground-slag end: the proportioning of coke fines: wilkinite: water=100:5.5:5.5:3.5 is even with four kinds of mixing of materials, put into balling disc, make it to form the pelletizing that diameter is not more than 15mm, send in rotary kiln or the shaft furnace, roasting is 35 minutes under 1300 ℃ of high temperature, makes high-strength nickel iron ball group;
E, by weight, with high-strength nickel iron ball group: the proportioning of coke: Wingdale=100:5.5:3.5, three kinds of materials are put into blast furnace smelt, form Rhometal liquid, pour into the Rhometal ingot at last.
Embodiment 3
A, with nickel oxide ores drying, screening, fragmentation, make that granularity is not more than 15mm, moisture is not more than 12% breeze, by weight, with breeze: the proportioning of coke fines: unslaked lime=100:4:5 is even with three kinds of mixing of materials, send into and use the coal gas roasting in the rotary kiln, under 850 ℃ of temperature, roasting 30 minutes, carry out Water Quenching then, make above-mentioned three kinds of materials form the ferronickel slag, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250, makes the ferronickel slag have certain magnetic;
B puts into ball mill and rod mill successively with above-mentioned ferronickel slag, wears into less than 320 purpose ferronickel ground-slag ends;
C makes above-mentioned ferronickel ground-slag end by intensity magnetic separator, and ferronickel with magnetic that still is in the state of oxidation in the ferronickel ground-slag end and impurity such as non-magnetic silicon-dioxide, aluminium sesquioxide are separated, must selected ferronickel ground-slag end;
D, by weight, with selected ferronickel ground-slag end: the proportioning of coke fines: wilkinite: water=100:5:5:3 is even with four kinds of mixing of materials, put into balling disc, make it to form the pelletizing that diameter is not more than 15mm, send in rotary kiln or the shaft furnace, roasting is 30 minutes under 1200 ℃ of high temperature, makes high-strength nickel iron ball group;
E, by weight, with high-strength nickel iron ball group: the proportioning of coke: Wingdale=100:5:3, three kinds of materials are put into blast furnace smelt, form Rhometal liquid, Rhometal liquid is directly injected the AOD stove further be refined into the Rhometal product.
Claims (1)
1, a kind of from nickel oxide ore the method for refining ferronickel alloy, it is characterized in that the processing step of described method is,
A, with nickel oxide ores fragmentation, drying, screening, make that granularity is not more than 15mm, moisture is not more than 12% breeze, by weight, with breeze: the proportioning of coke fines: unslaked lime=100:3.5～4.5:4.5～5.5 is even with three kinds of mixing of materials, send into roasting in the rotary kiln, under 830 ℃～870 ℃ of temperature, roasting 25～35 minutes, carry out Water Quenching then, make above-mentioned three kinds of materials form the ferronickel slag, the ferric oxide that is in the nickel ores under the state of oxidation tentatively is reduced to Z 250, makes the ferronickel slag have certain magnetic;
B puts into ball mill and rod mill successively with above-mentioned ferronickel slag, wears into less than 320 purpose ferronickel ground-slag ends;
C makes above-mentioned ferronickel ground-slag end by intensity magnetic separator, and ferronickel with magnetic that still is in the state of oxidation in the ferronickel ground-slag end and impurity such as non-magnetic silicon-dioxide, aluminium sesquioxide are separated, must selected ferronickel ground-slag end;
D, by weight, with selected ferronickel ground-slag end: the proportioning of coke fines: wilkinite: water=100:4.5～5.5:4.5～5.5:2.5～3.5 is even with four kinds of mixing of materials, put into balling disc, make it to form the pelletizing that diameter is not more than 15mm, pelletizing is sent in rotary kiln or the shaft furnace, and roasting is 25～35 minutes under 1100～1300 ℃ of high temperature, makes high-strength nickel iron ball group;
E, by weight, with high-strength nickel iron ball group: the proportioning of coke: Wingdale=100:4.5～5.5:2.5～3.5, three kinds of materials are put into blast furnace to be smelted, form Rhometal liquid, pour into the Rhometal ingot at last or Rhometal liquid is directly injected the AOD stove and further be refined into the Rhometal product.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101134817A CN101418356A (en) | 2007-10-28 | 2007-10-28 | A kind of from nickel oxide ore the method for refining ferronickel alloy |
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| CNA2007101134817A CN101418356A (en) | 2007-10-28 | 2007-10-28 | A kind of from nickel oxide ore the method for refining ferronickel alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886231A (en) * | 2010-06-30 | 2010-11-17 | 李春德 | Method for manufacturing nickel iron alloy |
| CN105217975A (en) * | 2015-09-18 | 2016-01-06 | 江苏融达新材料股份有限公司 | The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder |
| CN105463141A (en) * | 2015-04-13 | 2016-04-06 | 潘料庭 | Method for smelting high-nickel molten iron through low-poor-grade nickel laterite ore |
| CN106636625A (en) * | 2017-01-06 | 2017-05-10 | 宝钢德盛不锈钢有限公司 | Method for producing ferronickel by adopting rotary kiln direct reduction-RKEF (Rotary Kiln-Electric Furnace) combination method |
-
2007
- 2007-10-28 CN CNA2007101134817A patent/CN101418356A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886231A (en) * | 2010-06-30 | 2010-11-17 | 李春德 | Method for manufacturing nickel iron alloy |
| CN101886231B (en) * | 2010-06-30 | 2012-11-14 | 李春德 | Method for manufacturing nickel iron alloy |
| CN105463141A (en) * | 2015-04-13 | 2016-04-06 | 潘料庭 | Method for smelting high-nickel molten iron through low-poor-grade nickel laterite ore |
| CN105217975A (en) * | 2015-09-18 | 2016-01-06 | 江苏融达新材料股份有限公司 | The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder |
| CN106636625A (en) * | 2017-01-06 | 2017-05-10 | 宝钢德盛不锈钢有限公司 | Method for producing ferronickel by adopting rotary kiln direct reduction-RKEF (Rotary Kiln-Electric Furnace) combination method |
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Open date: 20090429 |