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Pyrolysis and vulcanization beneficiation method for laterite-nickel ore, metal sulfide and application

A technology of metal sulfide and laterite nickel ore, which is applied in chemical instruments and methods, cobalt sulfide, iron sulfide, etc., can solve the problems of large amount of slag in the smelting process and inability to beneficiate laterite nickel ore, so as to improve the comprehensive utilization efficiency of energy, Significant economic and social benefits, the effect of low temperature

Active Publication Date: 2022-05-27
陈崇学
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The technical problem to be solved by the present invention is that at present, laterite nickel ore cannot be beneficiated, resulting in a particularly large amount of slag in the smelting process. The present invention has developed a pyrolysis sulfide mineral processing method of laterite nickel ore and the prepared metal sulfide and its application. In this method, the laterite nickel ore is dried to remove free water, and then heated together with a vulcanizing agent, so that the nickel-cobalt oxide in the laterite nickel ore is converted into sulfide, and then the mature nickel-cobalt sulfide flotation technology is used to make the laterite nickel ore Under certain conditions, it can be ore-dressed, reducing a large amount of slag formed by gangue for the downstream smelting process, thereby reducing the energy consumption of lateritic nickel ore smelting, which has great economic and social value

Method used

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  • Pyrolysis and vulcanization beneficiation method for laterite-nickel ore, metal sulfide and application

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Effect test

Embodiment 1

[0066] like figure 1 Shown is the process flow chart of the pyrolysis sulfide mineral processing method of the laterite nickel ore of the present invention; the detailed steps of the pyrolysis sulfide mineral processing method of the laterite nickel ore of the present invention are as follows:

[0067] A smelting project is an integrated project of mining and smelting, and the smelting plant is built in the laterite nickel mining area. Its smelting process adopts 60000Kva ferronickel smelting RKEF process (rotary kiln + electric furnace) and has been built (such as figure 2 ), including drying kiln 1, roasting kiln 2 and submerged thermal electric furnace 3. At present, it is planned to transform the process, utilize the present invention to reduce the amount of slag, and concentrate is added to the electric furnace for smelting.

[0068] The scheme is as follows: After testing, the lateritic nickel ore contains an average of 1.78wt% nickel, 0.03wt% cobalt, 19wt% iron and 38...

Embodiment 2

[0075] A smelting project is an integrated project of mining and smelting, and the smelting plant is built in the laterite nickel mining area. Its smelting process adopts 33000Kva ferronickel smelting RKEF process and has been established (such as figure 2 ), including drying kiln 1, roasting kiln 2 and submerged heat electric furnace 3. At present, it is planned to transform the process, first re-election and then flotation to obtain nickel-cobalt concentrate, and then add nickel-cobalt concentrate to electric furnace smelting, thereby reducing the amount of slag in electric furnace smelting. Process equipment diagram after technical transformation image 3 , the main added equipment is gravity hydrocyclone 4 and flotation machine 5. The main process details are improved as follows: reduce the original kiln head temperature of the drying kiln from 600-800°C to 300-500°C; reduce the original rotary kiln head temperature from 1100-1300°C to 500-750°C; Charcoal and anthracite...

Embodiment 3

[0083] A smelting project is an integrated project of mining and smelting. The smelting plant is planned to be built in the lateritic nickel mining area. After testing, the lateritic nickel ore contains an average of 1.65wt% nickel, 0.05wt% cobalt, 26wt% iron and 38% moisture . The beneficiation process adopts the process technology of the present invention, and the nickel-cobalt sulphide smelting process adopts a flash furnace. The main equipment includes drying kiln, vulcanization and roasting kiln, flotation machine, filter press, fine ore dryer, cloth bag collector, pneumatic conveying system, flash furnace, etc. Its main technological process adopts sulfide powder ore to be sprayed into flash furnace to make matte smelting after drying and dust collection.

[0084] The process is as follows: at a drying temperature of 200°C and a drying time of 0.5 hours, dry in a drying kiln until the water content is 25%, then add the dry ore to the roasting kiln, and continuously spra...

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Abstract

The embodiment of the invention discloses a pyrolysis and vulcanization beneficiation method for laterite-nickel ore, metal sulfide and application, and belongs to the technical field of nonferrous metal ore beneficiation. The method comprises the following steps: S1) optionally drying the laterite-nickel ore to obtain dry laterite-nickel ore; s2) carrying out heating reaction on the dry laterite-nickel ore and a vulcanizing agent to obtain vulcanized mixed ore; and S3) crushing and grinding the vulcanized mixed ore to obtain fine ore, then feeding the fine ore into an ore dressing procedure, and separating to obtain metal sulfide and residual tailings. According to the method developed by the invention, after the laterite-nickel ore is dried to remove free water, a vulcanizing agent is added for heating together, so that nickel-cobalt oxide in the laterite-nickel ore is converted into sulfide, and then the laterite-nickel ore can be subjected to mineral separation under certain conditions by adopting a current mature nickel-cobalt sulfide flotation technology; and a large amount of slag formed by gangue is reduced for a downstream smelting process, so that the energy consumption problem of laterite-nickel ore smelting is reduced, and the method has great economic and social values.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal ore beneficiation, and relates to a pyrolysis sulfidation beneficiation method of laterite nickel ore, the prepared metal sulfide and its application. Background technique [0002] According to data released by the U.S. Geological Survey in 2015, the global proven basic reserves of nickel are about 81 million tons, and the total resources are 148 million tons. About 60% of the basic reserves are laterite nickel ore, and about 40% are nickel sulfide ore. [0003] Nickel sulfide ore is mainly distributed in areas above 30° north-south latitude, such as the Jinchuan nickel ore belt in Gansu Province, China, and the Panshi nickel ore belt in Jilin Province; the Sudbury nickel ore belt in Ontario, Canada; the Manitoba province, Canada Lynn Lake-Thompson Nickel Belt in Lynn Lake; Russia Kojia Peninsula Nickel Belt; Russia Siberia Norilsk (HophHjibck) Nickel Belt; Australia KaMbalda Nickel Belt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B23/00C01G53/11C01G49/12C01G51/00
CPCC22B1/00C22B23/005C01G53/11C01G49/12C01G51/30Y02P10/20
Inventor 陈崇学王瑾
Owner 陈崇学
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