CN113136493A - High-efficient dilution reduction device of nickel smelting sediment - Google Patents
High-efficient dilution reduction device of nickel smelting sediment Download PDFInfo
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- CN113136493A CN113136493A CN202110636043.9A CN202110636043A CN113136493A CN 113136493 A CN113136493 A CN 113136493A CN 202110636043 A CN202110636043 A CN 202110636043A CN 113136493 A CN113136493 A CN 113136493A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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Abstract
The invention discloses a high-efficiency dilution reduction device for nickel smelting slag, which comprises a furnace body, wherein a melt receiving area and a dilution reduction area are sequentially arranged in the furnace body, the melt receiving area and the dilution reduction area are mutually communicated, a first receiving port, a second receiving port, a feeding port and a smoke outlet are arranged at the upper part of the furnace body, an electrode is arranged on the furnace body, a side-blowing spray gun is arranged on the side wall of the furnace body, the first receiving port and the second receiving port correspond to the melt receiving area, the feeding port and the smoke outlet correspond to the dilution reduction area, the electrode is correspondingly arranged in the dilution reduction area, and the side-blowing spray gun is communicated with the melt receiving area and the dilution reduction area. The invention can solve the problems of high nickel content of the slag in the prior nickel smelting process, high load and high energy consumption when an electric furnace is used for independently treating the nickel smelting slag.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a high-efficiency dilution and reduction device for nickel smelting slag.
Background
Traditional pyrometallurgy of nickel sulfide concentrates mainly refers to a process for smelting nickel sulfide concentrates to high-nickel matte, and generally comprises two steps of smelting and converting, wherein the smelting process mainly comprises a molten bath smelting process and a flash smelting process, and the converting process mainly comprises a P-S converter converting process and a top blowing converting process.
The nickel smelting process comprises closed blast furnace smelting, electric furnace smelting, oxygen-enriched top-blown furnace smelting, oxygen-enriched side-blown furnace smelting, flash smelting and the like.
Most smelting furnaces adopt oxygen-enriched strong oxidation smelting to enable nickel sulfide concentrate to react with oxygen rapidly, so that the oxygen potential of smelting slag is high, the nickel content in the slag is high, electric furnaces are arranged in production systems to further thin smelting slag, and the nickel content in the slag is reduced.
After the nickel sulfide concentrate with high magnesium oxide content is smelted, slag enters an electric furnace for dilution. The refractory iron forsterite and magnetic iron in the slag increase the viscosity and melting point of the slag, thereby reducing the fluidity of the slag and having poor dynamic conditions in the furnace. The magnetic iron causes a diaphragm layer to be formed between slag layers, and the slag layers are seriously bonded.
Because the density of the smelting slag is different from that of the reducing agent, the reducing agent is easy to float on the surface of the slag, the utilization rate of the reducing agent is low, and the reducing effect is poor.
The problems worsen the condition of electric furnace slag matte clarification and separation and increase the loss of nickel and copper.
Disclosure of Invention
Aiming at the technical problems, the invention provides an efficient dilution and reduction device for nickel smelting slag, which aims at solving the problems of high nickel content of the existing nickel smelting process slag and high load and energy consumption when an electric furnace is used for independently treating the nickel smelting slag.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the nickel smelting slag efficient dilution reduction device comprises a furnace body, wherein a melt receiving area and a dilution reduction area are sequentially arranged in the furnace body, the melt receiving area is communicated with the dilution reduction area, a first receiving port, a second receiving port, a feeding port and a smoke outlet are arranged at the upper part of the furnace body, an electrode is arranged on the furnace body, a side-blowing spray gun is arranged on the side wall of the furnace body, the first receiving port and the second receiving port correspond to the melt receiving area, the feeding port and the smoke outlet correspond to the dilution reduction area, the electrode is correspondingly arranged in the dilution reduction area, and the side-blowing spray gun is communicated with the melt receiving area and the dilution reduction area.
The lower part of one end of the furnace body is provided with a low-nickel matte discharge port, the lower part of the other end of the furnace body is provided with a slag discharge port, the low-nickel matte discharge port is correspondingly communicated with the melt receiving area, and the slag discharge port is correspondingly communicated with the dilution reduction area.
The slag discharge port is an overflow type slag discharge port.
The first receiving opening and the second receiving opening are made of unshaped refractory materials or graphite.
The electrode is a self-baking electrode of a star-shaped wiring of the transformer.
The side-blown spray gun is a straight-through spray gun.
The furnace body is of a horizontal furnace type, and the melt receiving area and the dilution reducing area are arranged along the length direction of the furnace body.
The hearth height of the melt receiving zone coincides with the hearth height of the depletion reduction zone.
The furnace top of the furnace body is provided with 2 to 3 smoke outlets.
And the furnace top of the furnace body is provided with a water jacket water-cooling beam.
The invention has the beneficial effects that: the invention provides a nickel smelting slag efficient dilution reduction device which is an integrated device and comprises a furnace body, wherein a melt receiving area is sequentially arranged in the furnace body, the melt receiving area is provided with a first receiving port and a second receiving port, the first receiving port is used for adding converter slag into the melt receiving area, and the second receiving port is used for adding smelting slag into the melt receiving area; the dilution reduction area is communicated with the melt receiving area and is provided with an electrode, a side-blowing spray gun, a feeding port and a smoke outlet, and the dilution reduction area is used for efficient dilution reduction of the nickel smelting slag to produce the depleted slag and low-nickel matte. The invention discloses an integrated device, wherein a nickel smelting slag efficient dilution reduction device comprises a furnace body, a melt receiving area is sequentially arranged in the furnace body, the melt receiving area is provided with a first receiving port and a second receiving port, the first receiving port is used for adding converter slag into the melt receiving area, and the second receiving port is used for adding smelting slag into the melt receiving area; the dilution reduction area is communicated with the melt receiving area and is provided with an electrode, a side-blowing spray gun, a feeding port and a smoke outlet. Spraying reducing substances into the side-blown spray gun, homogenizing heat distribution in the electric furnace by supplying heat and stirring proper melt, melting and bonding, increasing effective volume and settling time of the electric furnace, and reducing the content of valuable metals in the nickel smelting slag by using a physical means; the oxygen-deficient combustion of the spray gun is adopted to realize the reducing atmosphere in the furnace so as to hopefully carry out NiO and Fe in the nickel smelting slag304The strengthening reduction is realized, and the valuable metal contained in the nickel smelting slag is reduced by a chemical means. The high-efficiency dilution and reduction device for the nickel smelting slag provided by the invention can realize high-efficiency dilution and reduction of the nickel smelting slag in an electric furnace, the smelting slag has low nickel content, the load of the dilution process is small, and the energy consumption is low. By using the present inventionThe nickel smelting slag high-efficiency dilution reduction device can be used in a molten pool smelting system and a flash smelting system in a matching way, and has the advantages of wide application range and high economy.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein, 1, a furnace body; 2. a water jacket water-cooling beam; 3. a first receiving port; 4. a second receiving port; 5. a feed inlet; 6. a smoke outlet; 7. an electrode; 8. a depletion reduction zone; 9. a slag discharge port; 10. a side-blown spray gun; 11. a low nickel matte vent; 12. a melt receiving zone.
Detailed Description
As shown in figure 1, the nickel smelting slag efficient dilution reduction device comprises a furnace body 1, wherein a melt receiving area 12 and a dilution reduction area 8 are sequentially arranged in the furnace body 1, the melt receiving area 12 and the dilution reduction area 8 are communicated with each other, a first receiving port 3, a second receiving port 4, a feeding port 5 and a smoke outlet 6 are arranged at the upper part of the furnace body 1, an electrode 7 is arranged on the furnace body 1, a side-blowing spray gun 10 is arranged on the side wall of the furnace body 1, the first receiving port 3 and the second receiving port 4 correspond to the melt receiving area 12, the feeding port 5 and the smoke outlet 6 correspond to the dilution reduction area 8, the electrode 7 is correspondingly arranged in the dilution reduction area 8, and the side-blowing spray gun 10 is communicated with the melt receiving area 12 and the dilution reduction area 8.
As shown in figure 1, the lower part of one end of the furnace body 1 is provided with a low-nickel matte discharge port 11, the lower part of the other end of the furnace body 1 is provided with a slag discharge port 9, the low-nickel matte discharge port 11 is correspondingly communicated with a melt receiving area 12, and the slag discharge port 9 is correspondingly communicated with the dilution reduction area 8.
As shown in fig. 1, the slag discharge port 9 is an overflow type slag discharge port.
As shown in fig. 1, the material of the first receiving opening 3 and the second receiving opening 4 is amorphous refractory or graphite.
As shown in fig. 1, the electrode 7 is a self-baking electrode of a star connection of a transformer.
As shown in fig. 1, the side-blowing lance 10 is a straight-through lance.
The furnace body 1 is a horizontal furnace type, and the melt receiving area 12 and the dilution reducing area 8 are arranged along the length direction of the furnace body 1.
As shown in fig. 1, the melt receiving zone 12 has a hearth height that coincides with the hearth height of the depletion reduction zone 8.
As shown in fig. 1, 2 to 3 smoke outlets 6 are provided in the furnace top of the furnace body 1.
As shown in fig. 1, a water jacket water-cooling beam 2 is provided on the ceiling of a furnace body 1.
In the actual production process, nickel smelting slag enters the device through the first receiving port 3 and the second receiving port 4, the temperature of the nickel smelting slag is increased through the high-temperature clarification effect of the electrode 7, a reducing agent or a vulcanizing agent is added through the feeding port 5 to participate in vulcanization and reduction reactions, natural gas or pulverized coal is blown into a slag layer through the side blowing spray 10 to increase the dynamic conditions of a molten pool, on one hand, heat is supplemented to the molten pool, the problem of insufficient heat in a dead zone of the electrode is solved, on the other hand, the side blowing spray 10 is used for oxygen deficient combustion, so that the reducing atmosphere in the furnace is realized, NiO and Fe in the nickel smelting slag are expected to be added304The strengthening reduction is realized, the valuable metal content of the nickel smelting slag is effectively reduced, and the nickel content of the slag is about 0.08-0.2%.
In a word, the invention provides an efficient dilution and reduction device for nickel smelting slag, which effectively solves the problems that the nickel content of the existing nickel smelting dilution process slag is high, and the load and the energy consumption are high when an electric furnace independently processes the nickel smelting slag. The nickel smelting slag enters the furnace through the receiving port, the electrode heats the melt, the high-temperature clarification is realized, the side-blown spray gun effectively improves the temperature and the slag dilution is realized, the production is stable, the dilution effect is good, and the nickel content of the slag is low.
In a preferred embodiment, the melt receiving area 12 can receive nickel slag such as converter slag or smelting slag and can process various types of nickel smelting slag, and the dilution reduction area 8 is used for efficient dilution reduction of the nickel smelting slag to produce the depleted slag and low-nickel matte and is provided with an electrode 7, a side-blowing lance 10, a charging opening 5 and a smoke outlet 6.
In a preferred embodiment, two end walls of the furnace body 1 of the high-efficiency nickel smelting slag dilution and reduction device are respectively provided with a low-nickel matte discharge port 11 and a slag discharge port 9, and the side wall can also be provided with the low-nickel matte discharge port 11 according to the nickel smelting slag treatment capacity. Because the nickel content of the waste slag is less than or equal to 0.2 percent, the waste slag can be directly treated, and more preferably, the waste slag can be treated by steel ladle hauling, a water quenching process and a wind quenching process.
In order to further improve the stability of the liquid level and the safety of the device, the slag discharging port 9 of the high-efficiency nickel smelting slag dilution reduction device can be arranged as an overflow type slag discharging port, and natural gas above the slag discharging port keeps warm.
In a preferred embodiment, the melt receiving zone 12 of the high-efficiency nickel slag depletion reduction apparatus is equipped with receiving openings based on melt properties. More preferably, the first receiving opening 3 and the second receiving opening 4 are made of cast steel, and the nickel smelting slag receiving opening is made of amorphous refractory pouring or graphite and can be continuously fed or discontinuously fed.
In a preferred embodiment, the electrode 7 of the nickel smelting slag efficient dilution reduction device passes through the furnace body 1 to the dilution reduction zone 8, and the electrodes 7 are arranged in a plurality of, more preferably, the electrodes 7 are self-baking electrodes, star-shaped connection of transformers and regular triangle arrangement.
In a preferred embodiment, a plurality of side-blowing lances 10 are arranged at the positions of the first side wall and the second side wall of the furnace body 1 of the high-efficiency nickel smelting slag dilution and reduction device. More preferably, the side-blowing lance 10 is a straight-through lance, the side-blowing lance 10 is disposed at a high level in the sidewall slag layer, and the side-blowing lance 10 injects reducing substances such as pulverized coal and oxygen-enriched air or (natural gas and oxygen-enriched air) at a high speed.
In order to further improve the safety of the high-efficiency nickel smelting slag dilution and reduction device and avoid serious accidents such as furnace leakage, the side-blown spray gun 10 is provided with a gun seat water jacket, the spray gun is inserted into the gun seat water jacket, and the outside of the spray gun is fixed by a mounting seat, so that the cooling strength of the side-blown spray gun is improved.
In a preferred embodiment, the furnace body 1 of the nickel smelting slag high-efficiency dilution and reduction device is a horizontal furnace type, the melt receiving area 12 and the dilution and reduction area 8 are arranged along the length direction of the furnace body, and the furnace body 1 is provided with furnace wall water jackets to be tightly matched with bricks.
In a preferred embodiment, the nickel smelting slag high-efficiency dilution and reduction device is provided with a feed inlet 5, the feed inlet 5 penetrates through the furnace body to enter a melt receiving area 12 and a dilution and reduction area 8, and a vulcanizing agent and a reducing agent are added into the feed inlet 5. More preferably, the vulcanizing agent can adopt ultra-rich ore and nickel concentrate.
In a preferred embodiment, the nickel smelting slag efficient dilution reduction device is provided with 2 to 3 smoke outlets 6, the smoke outlets 6 penetrate through the furnace body and enter a dilution reduction zone 8, smoke in the nickel smelting slag dilution reduction process is discharged by the smoke outlets 6, the temperature of the smoke is 900-. More preferably, the flue gas cooling device can utilize an outer water jacket type water cooling flue or a membrane wall water cooling flue.
In a preferred embodiment, in an embodiment not shown in the figure, a CO gas analysis alarm and an interlocking device are arranged at the rear end of the flue gas cooling device and are used for CO alarm and flue oxygen supplementation to solve the deflagration problem of escaping CO.
In a preferred embodiment, the water jacket water-cooling beam 2 is arranged on the furnace top of the nickel smelting slag high-efficiency dilution reduction device and is used for cooling the furnace top.
In a preferred embodiment, the front process of the nickel smelting slag efficient dilution and reduction device can be provided with a top-blown furnace or a flash furnace, and the slag can automatically flow into the nickel smelting slag efficient dilution and reduction device through a chute to realize the efficient dilution and reduction of the slag.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1.
The structure of the nickel smelting slag efficient dilution reduction device is shown in fig. 1, and specifically comprises the following steps:
the length of the slag line of the furnace body 1 is 28000mm, the width is 8000mm, the height of the furnace chamber is 5500mm, the liquid level height of the low nickel matte is 750mm, and the thickness of the slag layer is 13500 mm. Melt receiving area 12 sets up 5 receiving ports, and low-nickel matte discharge port 11 sets up 5, and highly 420mm, wherein sets up 2 near the headwall of melt receiving area 12, and the side wall sets up 3. The slag discharge port 9 is arranged on the other end wall far away from the melt receiving area, the slag is discharged by using a weir port, a natural gas spray gun above the weir port keeps warm, the weir port is kept smooth, and the slag is treated by a slag water quenching process.
The electrodes 7 are arranged into 3 groups, each group of 3 electrodes with the diameter of 1000mm are arranged in a star shape, and the maximum power of each group of electrodes is 15000 kVA.
The side walls are respectively provided with 6 natural gas (pulverized coal spray guns) stirring molten pools, the height of each spray gun is 1600mm, and the side-blowing spray gun 10 is arranged in a mode of avoiding the electrode 7. The side-blown spray gun 10 is composed of a gun base water jacket, a pipe base and a spray gun, and eliminates the hidden trouble of melt leakage.
The high-efficiency dilution reduction device for the nickel smelting slag is provided with 2 smoke outlets 6, the smoke outlets 6 penetrate through the furnace body 1 and enter a dilution reduction area 8, smoke in the dilution reduction process of the nickel smelting slag is discharged through the smoke outlets 6, the smoke temperature is 900-plus-1100 ℃, the smoke is cooled through a cooling device such as an outer water jacket type water cooling flue or a membrane wall water cooling flue, the smoke temperature is reduced to 280-plus-380 ℃, then the smoke enters an electric dust collector for dust removal, and is purified and emptied through acid making. A CO gas analysis alarm instrument and an interlocking device are arranged at the rear end of the flue gas cooling device and used for CO alarming and flue oxygen supplementation, and the problem of CO deflagration loss is solved.
The water jacket water-cooling beam 2 is arranged on the furnace top to cool the furnace top, so that the hidden danger that the buried pipe of the H-shaped water-cooling beam is easy to leak is eliminated.
The nickel sulfide concentrate is smelted by utilizing the high-efficiency dilution reduction device for the nickel smelting slag, and the specific technological process is as follows:
(1) and (4) batching nickel-copper sulfide concentrate. After nickel-copper sulfide bulk concentrate (containing Ni more than or equal to 6 percent), quartz stone flux, limestone flux, selected raw coal, soot and the like are proportioned by a disc and a quantitative feeder, the proportioned raw coal, the soot and the like are transported to the top of a smelting furnace by a belt conveyor and are added into the furnace by a movable belt conveyor. The smelting furnace produces low-nickel matte Ni 20-25%, Cu 10-15%, Fe 25-30%, S22-28%, and the operation temperature is 1230-1250 ℃. The content of Fe/SiO2 in the nickel smelting slag is 0.9-1.1%, the content of Ni1.2-2.5% in the slag, the content of MgO 10-14% in the slag and the temperature of the slag is 1250-1300 ℃. The temperature of the smelting flue gas is 1000-1300 ℃, and the smelting flue gas is sent to a flue gas treatment system for treatment.
(2) After the low-nickel matte is blown by a horizontal converter, high-nickel matte Ni 40-50%, Cu 25-30% and Fe 2-3.5% are generated, and the operation temperature is 1200-1300 ℃. The nickel converter slag contains Ni 1-4% and has a slag temperature of 1200-1300 deg.C.
(3) The low-nickel matte of the smelting furnace is sent to a converter for converting through a ladle and a metallurgical crane, and the nickel smelting slag automatically flows to a high-efficiency dilution reduction device of the nickel smelting slag through a chute. Part of low-nickel matte of the nickel smelting furnace automatically flows to the high-efficiency dilution and reduction device of the nickel smelting slag through the chute. The nickel converter slag is transported to the top of the nickel smelting slag efficient dilution reduction device through a ladle and a metallurgical crane, and automatically flows to the nickel smelting slag efficient dilution reduction device through a cast steel chute.
(4) The nickel smelting slag, the converter slag and part of low-nickel matte enter a melt receiving area 12, the temperature of the melt is increased through electrodes in a dilution reducing area 8, lump coal and silicon carbide are properly added into a material pipe to serve as reducing agents, meanwhile, natural gas (or pulverized coal) and oxygen-enriched air are blown into a side-blowing spray gun 10 to stir a molten pool, the dynamic condition of the molten pool is increased, and the utilization rate of the reducing agents is increased. Because the side-blowing spray gun 10 is arranged in the area far away from the electrode 7, the side-blowing spray gun 10 can control the oxygen concentration, and heat is supplemented for the low-temperature area to prevent the melt from bonding.
(5) The chemical loss and physical loss nickel matte particles are smoothly settled to the furnace bottom through the device to form low nickel matte, Ni 22-27%, Cu 12-17%, Fe 25-30%, S22-28% and the operation temperature is 1250-1280 ℃. The nickel content of the nickel smelting slag after the high-efficiency dilution reduction is 0.08 to 0.2 percent, and the operation temperature is 1350 to 1450 ℃.
(6) The smoke temperature of the nickel smelting slag efficient dilution reduction device is 900-1100 ℃, the water jacket water-cooling beam 2 is arranged on the furnace top, and the furnace top is cooled, so that the safety of the furnace top is improved. After the high temperature is cooled by the outer water jacket flue and the membrane wall flue, the temperature of the flue gas is 280-380 ℃, and the flue gas enters a dust collection device. A CO gas analysis alarm instrument and an interlocking device are arranged at the rear end of the flue gas cooling device and used for CO alarming and flue oxygen supplementation, and the problem of CO deflagration loss is solved.
The technical solution provided by the present invention is described in detail above. The present invention has been described herein with the aid of specific principles and embodiments, and the foregoing description of the embodiments is merely intended to facilitate the understanding of the structure and spirit of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
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| CN202110636043.9A CN113136493A (en) | 2021-06-08 | 2021-06-08 | High-efficient dilution reduction device of nickel smelting sediment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182110A (en) * | 2021-12-03 | 2022-03-15 | 中国瑞林工程技术股份有限公司 | Side-blown smelting device and smelting method |
| CN115505755A (en) * | 2022-08-10 | 2022-12-23 | 金川镍钴研究设计院有限责任公司 | Smelting method of high-magnesium low-nickel sulfide concentrate |
| CN116623007A (en) * | 2023-06-15 | 2023-08-22 | 兰州有色冶金设计研究院有限公司 | Method for producing low nickel matte by utilizing nickel-containing sludge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074080A (en) * | 2020-01-16 | 2020-04-28 | 中国恩菲工程技术有限公司 | One-step nickel smelting device |
| CN111101001A (en) * | 2020-01-16 | 2020-05-05 | 中国恩菲工程技术有限公司 | One-step nickel smelting system and one-step nickel smelting method |
| CN214881767U (en) * | 2021-06-08 | 2021-11-26 | 金川集团股份有限公司 | Nickel smelting slag high-efficiency depletion reduction device |
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2021
- 2021-06-08 CN CN202110636043.9A patent/CN113136493A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074080A (en) * | 2020-01-16 | 2020-04-28 | 中国恩菲工程技术有限公司 | One-step nickel smelting device |
| CN111101001A (en) * | 2020-01-16 | 2020-05-05 | 中国恩菲工程技术有限公司 | One-step nickel smelting system and one-step nickel smelting method |
| CN214881767U (en) * | 2021-06-08 | 2021-11-26 | 金川集团股份有限公司 | Nickel smelting slag high-efficiency depletion reduction device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182110A (en) * | 2021-12-03 | 2022-03-15 | 中国瑞林工程技术股份有限公司 | Side-blown smelting device and smelting method |
| CN115505755A (en) * | 2022-08-10 | 2022-12-23 | 金川镍钴研究设计院有限责任公司 | Smelting method of high-magnesium low-nickel sulfide concentrate |
| CN116623007A (en) * | 2023-06-15 | 2023-08-22 | 兰州有色冶金设计研究院有限公司 | Method for producing low nickel matte by utilizing nickel-containing sludge |
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