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Treatment method of laterite-nickel ore

A lateritic nickel ore and treatment method technology, applied in the field of metallurgy, can solve the problems of serious environmental pollution, complex treatment process, high equipment requirements, etc., achieve good comprehensive benefits and avoid environmental pollution

Active Publication Date: 2014-03-26
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of the wet process is lower than that of the fire process, but the processing process is complex, the process is long, and the process conditions require high equipment requirements
The pyro-wet process is complicated, the process is long, and its energy consumption is also high, which seriously pollutes the environment
[0003] Therefore, the current processing method of laterite nickel ore still needs to be improved

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0066] A laterite nickel ore with a nickel grade of 1.31% by weight and a total iron content of 23.75% by weight is used. According to the ratio of laterite nickel ore: carbon black: additive = 100:12:10, after mixing evenly, use a double-roller high-pressure briquetting machine to make agglomerates, and distribute the dried carbon-containing pellets into the rotary hearth furnace through the distribution device , the carbon-containing pellets are reduced in a regenerative rotary hearth furnace, the reduction temperature is 1500°C, and the reduction time is 60 minutes. The metallized pellets discharged from the discharge port are crushed and dry-type magnetic separation to obtain the nickel grade of nickel-iron particles. It is 14.16% by weight. At the same time, in order to improve the recovery rate of nickel, the tailings were subjected to wet grinding and separation in an electric furnace, and the nickel grade of the obtained nickel-iron alloy was 8.33% by weight. The tota...

Embodiment 2

[0068] A laterite nickel ore with a nickel grade of 0.72% by weight and a total iron content of 41.93% by weight is used. According to the proportion of laterite nickel ore: carbon black: additive = 100:26:17, after mixing evenly, use a double-roller high-pressure briquetting machine to make agglomerates, and distribute the dried carbon-containing pellets into the rotary hearth furnace through the distribution device , the carbon-containing pellets are reduced in a regenerative rotary hearth furnace, the reduction temperature is 1450°C, and the reduction time is 45 minutes. The metallized pellets discharged from the discharge port are crushed and dry-type magnetic separation to obtain the nickel grade of nickel-iron particles. It is 4.11% by weight. At the same time, in order to improve the recovery rate of nickel, the tailings were subjected to wet grinding and then melted in a non-electric furnace. The nickel grade of the nickel-iron alloy obtained by melting was 6.07% by we...

Embodiment 3

[0070] A laterite nickel ore with a nickel grade of 1.71% by weight and a total iron content of 11.62% by weight is used. According to the proportion of laterite nickel ore: carbon black: additive = 100:5:20, after mixing evenly, use a double-roller high-pressure briquetting machine to make agglomerates, and distribute the dried carbon-containing pellets into the rotary hearth furnace through the distribution device , the carbon-containing pellets are reduced in a regenerative rotary hearth furnace, the reduction temperature is 1550°C, and the reduction time is 105min. The metallized pellets discharged from the discharge port are crushed and dry-type magnetic separation to obtain the nickel grade of nickel-iron particles. It is 30.47% by weight. At the same time, in order to improve the recovery rate of nickel, the tailings were subjected to wet grinding and then melted in a non-electric furnace. The nickel grade of the nickel-iron alloy obtained by melting was 16.58% by weigh...

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Abstract

The invention discloses a smelting method of laterite-nickel ore. The method comprises the following steps: pelleting laterite-nickel ore, carbon black and additives; carrying out reducing roasting on the laterite-nickel ore pellets in a heat-accumulation rotary hearth furnace to obtain metalized pellets; and carrying out slag-iron separation on the metalized pellets to obtain nickel iron and tailings. The method can be effectively utilized to prepare the nickel iron product.

Description

technical field [0001] The invention relates to the field of metallurgy. In particular, the present invention relates to a lateritic nickel ore treatment method. Background technique [0002] Nickel is an important non-ferrous metal, mainly smelted from laterite nickel ore and nickel sulfide ore. At present, the smelting process of laterite nickel ore is roughly divided into three categories: pyrotechnics, wet methods and combination of pyro-wet methods. The pyrotechnic process has the advantages of short process and high efficiency, but high energy consumption. The cost of the wet process is lower than that of the fire process, but the treatment process is complicated, the process is long, and the process conditions require high equipment. The pyro-wet process is complicated, the process is long, its energy consumption is also high, and it pollutes the environment seriously. [0003] Therefore, the current processing method of laterite nickel ore still needs to be impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C21B13/10C22C1/02C22C19/03C22C33/04C22C38/08
Inventor 吴道洪贾岩曹志成
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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