Method for processing laterite-nickel ore

A technology of lateritic nickel ore and silicon-magnesium-nickel ore, which is applied in the direction of improving process efficiency, can solve the problems of high energy consumption and increased acid consumption in pyrotechnics, and achieve the effect of high recovery rate and low energy consumption

Inactive Publication Date: 2011-10-26
广西银亿新材料有限公司
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Problems solved by technology

From the perspective of development trend, the country has higher and higher requirements for environmental protection and energy saving and emission reduction, and the development of pyrotechnics will inevitab

Method used

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  • Method for processing laterite-nickel ore
  • Method for processing laterite-nickel ore

Examples

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Embodiment 1

[0027] A process for treating laterite nickel ore with fire-wet combined method, which washes the laterite nickel ore by first scrubbing and then scrubbing, and separates the silicon magnesium nickel ore from the limonite type laterite nickel ore, and the silicon magnesium nickel ore The ferronickel is smelted by pyrotechnics, the steps of which are drying in a rotary kiln, pre-reduction roasting in a rotary kiln, and smelting of ferronickel in a submerged electric furnace. Limonite-type lateritic nickel ore is extracted by sulfuric acid atmospheric pressure leaching method to extract metallic nickel.

Embodiment 2

[0029] A fire-wet combined method for processing laterite nickel ore is characterized in that the laterite nickel ore is first scrubbed and then scrubbed to wash the ore, and the silicon magnesium nickel ore is separated from the limonite type laterite nickel ore. The mine uses pyrotechnics to smelt ferronickel. The steps are to use a rotary kiln to dry, then use a rotary kiln to pre-reduce and roast, and then use a submerged electric furnace to smelt ferronickel. Limonite-type lateritic nickel ore is extracted by sulfuric acid pressure leaching method.

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Abstract

The invention discloses a method for processing laterite-nickel ore. The method provided by the invention is characterized in that laterite-nickel ore undergoes an ore-washing treatment; noumeite and limonite-type laterite-nickel ore are separated; separated noumeite is melted by the pyrometallurgical process to generate ferronickel; and metallic nickel is extracted from the separated limonite-type laterite-nickel ore by the wet process. According to the method provided by the invention, based on the different mineral compositions of different laterite-nickel ore particle fractions, limonite-type laterite-nickel ore containing high content of iron and low content of magnesium is melted by the wet process to extract metallic nickel, thus leading to low acid consumption; noumeite containing low content of iron and high content of magnesium is melted by the pyrometallurgical process to extract ferronickel, thus leading to high quality of the produced ferronickel, high recovery rate of nickel, low energy consumption and simultaneous recovery of iron.

Description

technical field [0001] The invention relates to a method for recovering metal minerals from laterite nickel ore, in particular to a method for extracting metal from transition layer laterite nickel ore. Background technique [0002] Lateritic nickel ore is mainly divided into three mineral components with mining value: the limonite layer on the surface, the saprolite layer above the bedrock, and the transition layer between limonite and saprolite. The nickel-containing minerals in limonite are goethite and / or hematite; the nickel-containing minerals in saprolite are mainly minerals with high silicon and magnesium content, such as serpentine, magnesite, chlorite, Nontronite and montmorillonite etc. The ore in the transition layer contains both limonite and saprolite. Limonite-type laterite-nickel ore contains high iron and low magnesium content, and the magnesian-nickel ore is just the opposite. [0003] For lateritic nickel ores with different properties, how to extract m...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/02C22B3/08C22B23/00
CPCY02P10/20
Inventor 肖万林王多冬王春轶和润秀王亚秦冯丽霜
Owner 广西银亿新材料有限公司
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