CN103088254A - Nickel steel bean production method - Google Patents
Nickel steel bean production method Download PDFInfo
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- CN103088254A CN103088254A CN2011103324225A CN201110332422A CN103088254A CN 103088254 A CN103088254 A CN 103088254A CN 2011103324225 A CN2011103324225 A CN 2011103324225A CN 201110332422 A CN201110332422 A CN 201110332422A CN 103088254 A CN103088254 A CN 103088254A
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- nickel steel
- nickel
- steel bean
- bean
- rotary kiln
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 155
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 235000010627 Phaseolus vulgaris Nutrition 0.000 title claims abstract description 62
- 244000046052 Phaseolus vulgaris Species 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229910000863 Ferronickel Inorganic materials 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000003723 Smelting Methods 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 8
- 230000001788 irregular Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 230000002829 reductive effect Effects 0.000 claims description 21
- 238000007670 refining Methods 0.000 claims description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 15
- 239000011707 mineral Substances 0.000 claims description 15
- 235000010755 mineral Nutrition 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000005864 Sulphur Substances 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000000571 coke Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 4
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 abstract 3
- 238000001354 calcination Methods 0.000 abstract 1
- 238000009628 steelmaking Methods 0.000 abstract 1
- 229910000805 Pig iron Inorganic materials 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000011504 laterite Substances 0.000 description 2
- 229910001710 laterite Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a nickel steel bean production method, and belongs to the technical field of steelmaking. Chemical components of the nickel steel bean comprise: 20% of Ni, 0.15-0.3% of Si, 0.1% of C, 0.03% of S, 0.03% of P, and the balance of Fe. The nickel steel bean has an irregular bean shape. Production steps comprise: treating ore, preparing a reduction agent, carrying out calcination in a rotation kiln, smelting in a submerged arc furnace, carrying out refinement on the crudely-prepared ferronickel, forming, adopting laterite-nickel ore as a raw material, and adopting a nickel steel bean forming device and a cooling water tank to rapid form, wherein the nickel steel bean forming device can be statically fixed, and further can horizontally rotate, and a water temperature of the cooling water tank is controlled to a certain temperature range. According to the present invention, the components of the nickel steel bean can be accurately controlled, such that the Ni content is about 20%, and the Si content and the S content are low; the side surface outlet size of the nickel steel bean forming device can be adjusted so as to adjust the size of the nickel steel bean; the nickel steel bean has characteristics of small size and light weight; and the temperature of the cooling water tank is controlled so as to control the shape of the nickel steel bean shape.
Description
Technical field
The present invention relates to a kind of production method of using metal of making steel, be specially a kind of production method of nickel steel bean of non-ferrous metal nickel.
Background technology
Along with the rapid growth of world economy, the demand of nickel is also constantly increased, but traditional limit by world's sulfuration nickel ore resource take nickel sulfide ore by the smeltery of raw material, production capacity will be restricted; And that the laterite resource accounts for the proportion of nickel resources is larger, therefore, fully rationally utilizes the laterite resource to become nickel industrial expansion direction.
The nickel content of China's ferronickel is many 4%～8% at present, can only be used as the batching of smelting stainless steel, and can not at smelting stainless steel during the later stage, when needs are adjusted the molten steel Chemical Composition, still will add a certain amount of refining pure nickel of people.
What use in the market is mainly the nickel-contained pig iron piece, and the production process of this nickel-contained pig iron piece is that nickeliferous molten metal is poured in mould on the ground, it is one fast that each mould can only water, and comprises the nickel molten metal in order to have watered one, need to keep flat on the ground many moulds, after watering full first mould, water again second, carry out successively, after each mould waters completely, allow its naturally cooling, solidify, after it solidified fully, the demoulding obtained the nickel-contained pig iron piece.Do not pass through the refining of molten metal due to this nickel-contained pig iron piece, contain a large amount of objectionable impuritiess, can not be directly used in the alloying process in Iron and Steel Production.This nickel-contained pig iron, general volume is larger, and substance is heavier, and general every has 10 kilograms of left and right, and it is not quite convenient to use.
Summary of the invention
The present invention also aims to provide a kind of nickel steel bean, it contains Si, S is low, can be used on the stainless steel smelting later stage, adjusts the nickel composition, and nickel steel bean is small, and substance is light.
Another object of the present invention is to provide the production method of this nickel steel bean.
The technical solution adopted in the present invention is as follows: a kind of nickel steel bean, and its chemical composition comprises: Ni20%, Si0.15～0.3%, C0.1%, S0.03%, P0.03%, all the other are Fe, it is shaped as irregular beans type.
A kind of production method of nickel steel bean, concrete production stage is:
A. preparation of ore and reductive agent are prepared: after ore is transported into stock yard, through broken, in and mixing, send into rotary kiln after allocating reductive agent into.
B. calcined by rotary kiln: the workspace of rotary kiln is by dryer section, heating zone, three sections formations of firing section, in rotary kiln, the ore roasting is dewatered, make weight reduce by 30% left and right, with reductive agent, nickel oxide and part iron are reduced again, the drawing mechanism of sealing is set at the rotary kiln discharge end, at the temperature of 600～900 ℃, the nickel slag is fed to the feed feed bin of mineral hot furnace insulation under heat insulation state, pass through again the tubular cloth materials device of a sealing, be assigned to equably in mineral hot furnace, different according to the processing mode of furnace charge, rotary kiln has different diameters and the ratio of length.
C. mine heat furnace smelting: rotary kiln material out in the hot mineral hot furnace of packing into, passes through arc smelting through after weighing, isolate raw ferro nickel and electric-furnace slag, produce simultaneously the reducing gas that contains 75%CO, the fuel use as rotary kiln accounts for 30% of rotary kiln fuel.
D. raw ferro nickel refining: in the process that mineral hot furnace is tapped a blast furnace to hot metal ladle, add SODA ASH LIGHT 99.2 in bag, sulphur in molten iron is reduced, remove the bits of waterborne of raw ferro nickel, and be blended in converter of acid lining, oxidized by oxygen blast silicon, ferronickel water after desiliconization is blended in converter of basic lining again, removes carbon, phosphorus and part iron in ferronickel water in converter, adds lime in smelting process in converter, the two step method refining can obtain qualified refining ferronickel water, this refining ferronickel water.
E. moulding: will make with extra care ferronickel water and inject the nickel steel bean former, then flow into the cooling basin, and be shaped at last nickel steel bean.
Described ore is red soil nickel ore, and described reductive agent is coke C, CO, H2.
Described nickel steel bean former, there is an opening its top, and opening communicates with inner chamber, and a plurality of fluid holes are arranged on inner chamber, and there is outlet the former side; The nickel steel bean former can be static fixing, also can horizontally rotate, and the side exit number is 1～20, and the side exit size shape is circular, square or rectangle, and the side exit size is the 5-50 millimeter.
Described cooling basin, for filling with the round large pond of water coolant, the size in pond is decided according to the turnout of nickel steel bean, and the diameter in preferred pond is 10 meters left and right, and the depth of water is 1.6～2 meters, and sump water temperature is controlled in certain temperature range by monitoring.
The present invention can control the composition of nickel steel bean accurately, makes Ni content in 20% left and right, contains Si, S is low, through adjusting nickel steel bean former side exit size, the size of regulating nickel steel bean, nickel steel bean is small, substance is light, by controlling the temperature of cooling basin, controls the shape of nickel steel bean.
Description of drawings
Fig. 1 is process flow sheet of the present invention
Fig. 2 is nickel steel bean former embodiment schematic diagram of the present invention
In Fig. 2: 1-opening, 2-inner chamber, 3-fluid hole, 4-outlet.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described and describes
A kind of nickel steel bean, its chemical composition comprises: Ni20%, Si0.15～0.3%, C0.1%, S0.03%, P0.03%, all the other are Fe, it is shaped as irregular beans type.
With reference to accompanying drawing 1, a kind of production method of nickel steel bean, concrete production stage is:
A. preparation of ore and reductive agent are prepared: after ore is transported into stock yard, through broken, in and mixing, send into rotary kiln after allocating reductive agent into.
B. calcined by rotary kiln: the workspace of rotary kiln is by dryer section, heating zone, three sections formations of firing section, in rotary kiln, the ore roasting is dewatered, make weight reduce by 30% left and right, with reductive agent, nickel oxide and part iron are reduced again, the drawing mechanism of sealing is set at the rotary kiln discharge end, at the temperature of 600～900 ℃, the nickel slag is fed to the feed feed bin of mineral hot furnace insulation under heat insulation state, pass through again the tubular cloth materials device of a sealing, be assigned to equably in mineral hot furnace, different according to the processing mode of furnace charge, rotary kiln has different diameters and the ratio of length.
C. mine heat furnace smelting: rotary kiln material out in the hot mineral hot furnace of packing into, passes through arc smelting through after weighing, isolate raw ferro nickel and electric-furnace slag, produce simultaneously the reducing gas that contains 75%CO, the fuel use as rotary kiln accounts for 30% of rotary kiln fuel.
D. raw ferro nickel refining: in the process that mineral hot furnace is tapped a blast furnace to hot metal ladle, add SODA ASH LIGHT 99.2 in bag, the sulphur in molten iron is reduced, remove the bits of waterborne of raw ferro nickel, and be blended in converter of acid lining, oxidized by oxygen blast silicon, the ferronickel water after desiliconization is blended in converter of basic lining again, removes carbon, phosphorus and part iron in ferronickel water in converter, add lime in smelting process in converter, the two step method refining can obtain qualified refining ferronickel water, this refining ferronickel water
E. moulding: will make with extra care ferronickel water and inject the nickel steel bean former, then flow into the cooling basin, and be shaped at last nickel steel bean.
Further, described ore is red soil nickel ore, and described reductive agent is coke C, CO, H2.
Further, described nickel steel bean former, there is an opening its top, and opening communicates with inner chamber, and a plurality of fluid holes are arranged on inner chamber, and there is outlet the former side; The nickel steel bean former can be static fixing, also can horizontally rotate, and the side exit number is 1～20, and the side exit size shape is circular, square or rectangle, and the side exit size is the 5-50 millimeter.
Further, described cooling basin is for filling with the round large pond of water coolant, the size in pond is decided according to the turnout of nickel steel bean, and the diameter in preferred pond is 10 meters left and right, and the depth of water is 1.6～2 meters, sump water temperature is controlled in certain temperature range by monitoring.
Embodiment 1: the production of round nickel steel bean
red soil nickel ore is through fragmentation, in and mixing, allocate the reductive agent coke into and send into rotary kiln, in rotary kiln, the ore roasting is dewatered, make weight reduce by 30% left and right, pass into again reductive agent CO, H2 is to nickel oxide and the reduction of part iron, the drawing mechanism of sealing is set at the rotary kiln discharge end, at the temperature of 600～900 ℃, the nickel slag is fed to the feed feed bin of mineral hot furnace insulation under heat insulation state, pass through again the tubular cloth materials device of sealing, be assigned to equably in mineral hot furnace, pass through arc smelting, isolate raw ferro nickel and electric-furnace slag, in the process that mineral hot furnace is tapped a blast furnace to hot metal ladle, add SODA ASH LIGHT 99.2 in bag, sulphur in molten iron is reduced, remove the bits of waterborne of raw ferro nickel, and be blended in converter of acid lining, oxidized by oxygen blast silicon, ferronickel water after desiliconization is blended in converter of basic lining again, remove the carbon in ferronickel water in converter, phosphorus and part iron, add lime in smelting process in converter, the two step method refining can obtain qualified refining ferronickel water, pour the high temperature nickel molten steel into ladle again, ladle is hung in the top of nickel steel bean former in driving, the nickel steel bean former is aimed at the mouth of a river of ladle bottom, open ladle nozzle, let out under high-temperature molten steel, enter the opening of nickel steel bean former, then flow out from a plurality of round outlet of nickel steel bean former side, enter in the pond of nickel steel bean former below, by transmission rig, nickel steel bean is pulled out from the pond, namely get nickel steel bean after drying.
Above-mentioned nickel steel bean former side exit shape can adopt circle, square or rectangle, also can adopt irregularly shapedly, different goes out mouth-shaped, obtains difform nickel steel bean, therefore not in this implementation for example one by one.
Claims (6)
1. a nickel steel bean, is characterized in that, its chemical composition comprises: Ni20%, and Si0.15～0.3%, C0.1%, S0.03%, P0.03%, all the other are Fe, it is shaped as irregular beans type.
2. the production method of nickel steel bean as claimed in claim 1, is characterized in that, concrete production stage is:
A. preparation of ore and reductive agent are prepared: after ore is transported into stock yard, through broken, in and mixing, send into rotary kiln after allocating reductive agent into.
B. calcined by rotary kiln: the workspace of rotary kiln is by dryer section, heating zone, three sections formations of firing section, in rotary kiln, the ore roasting is dewatered, make weight reduce by 30% left and right, with reductive agent, nickel oxide and part iron are reduced again, the drawing mechanism of sealing is set at the rotary kiln discharge end, at the temperature of 600～900 ℃, the nickel slag is fed to the feed feed bin of mineral hot furnace insulation under heat insulation state, pass through again the tubular cloth materials device of a sealing, be assigned to equably in mineral hot furnace, different according to the processing mode of furnace charge, rotary kiln has different diameters and the ratio of length.
C. mine heat furnace smelting: rotary kiln material out in the hot mineral hot furnace of packing into, passes through arc smelting through after weighing, isolate raw ferro nickel and electric-furnace slag, produce simultaneously the reducing gas that contains 75%CO, the fuel use as rotary kiln accounts for 30% of rotary kiln fuel.
D. raw ferro nickel refining: in the process that mineral hot furnace is tapped a blast furnace to hot metal ladle, add SODA ASH LIGHT 99.2 in bag, sulphur in molten iron is reduced, remove the bits of waterborne of raw ferro nickel, and be blended in converter of acid lining, oxidized by oxygen blast silicon, ferronickel water after desiliconization is blended in converter of basic lining again, removes carbon, phosphorus and part iron in ferronickel water in converter, adds lime in smelting process in converter, the two step method refining can obtain qualified refining ferronickel water, this refining ferronickel water.
E. moulding: will make with extra care ferronickel water and inject the nickel steel bean former, then flow into the cooling basin, and be shaped at last nickel steel bean.
3. the production method of nickel steel bean according to claim 2, is characterized in that, described ore is red soil nickel ore, and described reductive agent is coke C, CO, H2.
4. the production method of nickel steel bean according to claim 2, is characterized in that, described nickel steel bean former, and there is an opening its top, and opening communicates with inner chamber, and a plurality of fluid holes are arranged on inner chamber, and there is outlet the former side; The nickel steel bean former can be static fixing, also can horizontally rotate, and the side exit number is 1～20, and the side exit size is the 5-50 millimeter.
5. the production method of nickel steel bean according to claim 2, it is characterized in that, described cooling basin, for filling with the round large pond of water coolant, the size in pond is decided according to the turnout of nickel steel bean, and the diameter in preferred pond is 10 meters left and right, and the depth of water is 1.6～2 meters, sump water temperature is controlled in certain temperature range by monitoring.
6. the production method of nickel steel bean according to claim 4, is characterized in that, the side exit size shape of described nickel steel bean former is circular, square or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103324225A CN103088254A (en) | 2011-10-27 | 2011-10-27 | Nickel steel bean production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103324225A CN103088254A (en) | 2011-10-27 | 2011-10-27 | Nickel steel bean production method |
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|---|---|
| CN103088254A true CN103088254A (en) | 2013-05-08 |
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| CN2011103324225A Pending CN103088254A (en) | 2011-10-27 | 2011-10-27 | Nickel steel bean production method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104694972A (en) * | 2015-02-06 | 2015-06-10 | 铜陵百荣新型材料铸件有限公司 | Method for preparing ferro-nickle alloy from laterite nickel ore |
| CN115369211A (en) * | 2022-07-01 | 2022-11-22 | 李玉峰 | Method for enriching nickel by using AOD furnace |
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| CN101139642A (en) * | 2007-10-25 | 2008-03-12 | 金川集团有限公司 | Method for refining crude ferro nickel produced by lateritic nickel |
| CN101445845A (en) * | 2008-12-19 | 2009-06-03 | 陈法官 | Process for directly producing austenitic stainless steel by utilizing oxide nickel |
| CN101481753A (en) * | 2008-12-05 | 2009-07-15 | 首钢总公司 | Method for smelting nickel-iron alloy from laterite nickel oxide ore |
| US20110210185A1 (en) * | 2008-06-24 | 2011-09-01 | Uvån Hagfors Teknologi Aktiebolag | Method and device for output of granulate from the bottom of a tank that in addition to granulate holds liquid |
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2011
- 2011-10-27 CN CN2011103324225A patent/CN103088254A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532012A (en) * | 2003-03-20 | 2004-09-29 | 云南昆阳磷肥厂 | Method of pelletizing high temperature alloy liquid |
| CN101139642A (en) * | 2007-10-25 | 2008-03-12 | 金川集团有限公司 | Method for refining crude ferro nickel produced by lateritic nickel |
| US20110210185A1 (en) * | 2008-06-24 | 2011-09-01 | Uvån Hagfors Teknologi Aktiebolag | Method and device for output of granulate from the bottom of a tank that in addition to granulate holds liquid |
| CN101481753A (en) * | 2008-12-05 | 2009-07-15 | 首钢总公司 | Method for smelting nickel-iron alloy from laterite nickel oxide ore |
| CN101445845A (en) * | 2008-12-19 | 2009-06-03 | 陈法官 | Process for directly producing austenitic stainless steel by utilizing oxide nickel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104694972A (en) * | 2015-02-06 | 2015-06-10 | 铜陵百荣新型材料铸件有限公司 | Method for preparing ferro-nickle alloy from laterite nickel ore |
| CN115369211A (en) * | 2022-07-01 | 2022-11-22 | 李玉峰 | Method for enriching nickel by using AOD furnace |
| CN115369211B (en) * | 2022-07-01 | 2023-06-23 | 王泰刚 | Method for enriching nickel by utilizing AOD furnace |
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