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Method for pre-reduction of enriched nickel of laterite-nickel ore carbon-containing pellets

A technology of laterite nickel ore and carbon pellets, applied in the field of metallurgy, can solve the problems of low strength and inability to realize long-distance transportation, and achieve the effect of reducing transportation costs and solving poor strength.

Inactive Publication Date: 2017-01-04
GUANGXI SHENGLONG METALLURGICAL CO LTD
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  • Abstract
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Problems solved by technology

[0003] In view of the above technical problems, the present invention provides a method for manufacturing laterite nickel ore pellets. The laterite nickel ore pellets manufactured by this method can solve the problem that the laterite nickel ore pellets cannot be roasted because the strength is too low. The problem of long-distance transportation

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Embodiment Construction

[0011] In order to facilitate the understanding of the present invention, the following will describe the present invention more fully through specific embodiments. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0012] The method for enriching nickel by pre-reduction of carbon-containing pellets of laterite nickel ore comprises the following steps:

[0013] (1) Pre-roasting the laterite nickel ore raw material for 50 minutes at a temperature of 650°C to 980°C;

[0014] (2) finely grind the laterite nickel ore after pre-roasting into laterite nickel ore powder in a ball mill, and cross a 200-mesh sieve;

[0015] (3) The laterite nickel ore powder regulates moisture, pelletizes to produce pellets, and obtains laterite nickel ore pellets with a moist...

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Abstract

The invention relates to the field of metallurgy, in particular to a method for pre-reduction of enriched nickel of laterite-nickel ore carbon- containing pellets. The method includes the steps of pre-roasting a laterite-nickel ore raw material for 50 min, fine grinding the raw material into laterite-nickel ore powder, adjusting the water content, palletizing pellets, drying the pellets, and roasting the dried laterite-nickel ore pellets in a tubular furnace in five stages. The problem that intensity is poor when the laterite-nickel ore raw material is directly used for producing pellet ore is solved to a certain extent. Meanwhile, the problem that when laterite-nickel ore is imported, nearly 30% of transport cost is wasted on water transport can also be solved, and transport cost can be greatly reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for pre-reducing and enriching nickel by laterite nickel ore carbon-containing pellets. Background technique [0002] The moisture content of laterite nickel ore is high, about 35-40%. When importing laterite nickel ore from abroad, considerable transportation costs are wasted on hauling water. Therefore, it will be of practical significance to develop a new method for manufacturing laterite nickel ore pellets and roast laterite nickel ore to have high strength and meet the requirements of long-distance transportation. Contents of the invention [0003] In view of the above technical problems, the present invention provides a method for manufacturing laterite nickel ore pellets. The laterite nickel ore pellets manufactured by this method can solve the problem that the laterite nickel ore pellets cannot be roasted because the strength is too low. The problem of long-distance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B1/24C22B23/00
CPCC22B1/02C22B1/2406C22B23/005
Inventor 柯雪利黄玉鸿蔡恒忠
Owner GUANGXI SHENGLONG METALLURGICAL CO LTD
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