Method for obtaining nickel sulfide from pickled liquor of laterite nickel ore

A technology of lateritic nickel ore and nickel sulfide, applied in the direction of nickel sulfide, which can solve problems such as high operating costs, environmental pollution, and complicated treatment technology, and achieve the effects of low production cost, high yield rate, and simple process

Inactive Publication Date: 2006-02-22
曹国华
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the disadvantages of existing laterite nickel ore acid leaching leaching liquid treatment technology complex, high operating costs, environmental pollution and other deficiencies, the present invention proposes a simple trea

Method used

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  • Method for obtaining nickel sulfide from pickled liquor of laterite nickel ore

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Experimental program
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Effect test

Embodiment 1

[0018] A, first adjust the acidity and alkalinity of the leaching solution after atmospheric acid leaching, make the pH value reach 1.7, pump it into the stirring device, add potassium sulfide in the leaching solution by the mass ratio of nickel: potassium sulfide=1:3, stir Mix well, and when controlling the nickel ion concentration to be less than 0.02 g / liter, filter with the existing pressure filtration method;

[0019] B, filter residue is the amount of 1: 2 by solid-liquid ratio, after adding water slurrying, washing, through pressure filtration, pack to obtain nickel sulfide product;

[0020] C. In the filtrate obtained in the two steps of A and B, add lime to neutralize its acidity and alkalinity, make the pH value reach 2, and recycle.

Embodiment 2

[0022] A, adjust the pH value of the leach solution after atmospheric acid leaching to 1.8, pump it into the stirring device, add sodium sulfide in the leach solution by the mass ratio of nickel: sodium sulfide=1:6, stir and mix, control the nickel ion concentration to be less than 0.02 g / L, use the existing press filter method to filter;

[0023] B, filter residue is the amount of 1: 2 by solid-liquid ratio, add water to adjust slurry, wash, after press filtration, obtain nickel sulfide product;

[0024] C. Add lime to the filtrate obtained in the two steps of A and B. After acid-base neutralization, make the pH value reach 4 and discharge.

Embodiment 3

[0026] A, adjust the pH value of the leach solution after atmospheric acid leaching to 1.9, pump it into the stirring device, add calcium sulfide in the leach solution by nickel: calcium sulfide=1:8 mass ratio, stir and mix, control the nickel ion concentration less than 0.02 g / L, use the existing press filter method to filter;

[0027] B, filter residue is the amount of 1: 2 by solid-liquid ratio, add water to adjust slurry, wash, after press filtration, obtain nickel sulfide product;

[0028] C, in the filtrate obtained in the two steps of A and B, add alkali to carry out acid-base neutralization, make the pH value reach 3, and recycle.

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Abstract

The invention provides a method to obtain nickel sulfide from pickle liquor of laterite nickel mine. Wherein, the leachate has pH value not less than 1.7 with nickel and sodium sulfide added for the mass ratio 1:3-8; mixing evenly, controlling the nickel ion concentration less than 0.02g/L and filtering; adding water into the residue with ratio for solid and liquid of 1:2, clearing, filtering and obtaining the product; then, neutralizing the filtrate to pH value as 2-4 for recycle or release. This method can obtain high-grade product and the nickel deposition rate can reach 99.5% or more.

Description

technical field [0001] The invention relates to a method for preparing nickel sulfide, in particular to a method for directly obtaining nickel-cobalt sulfide from laterite nickel ore or nickel sulfide ore heap leaching solution. Background technique [0002] At present, there are the following processes for treating nickel sulfide ore: ①Autoclave acid leaching, suitable for processing ferrous nickel ore, containing nickel ≥ 1.5%, containing Mg ≤ 3.0%, can reduce acid consumption, and the nickel recovery rate is high; ② Reduction Roasting ammonia leaching, suitable for processing ferrous nickel ore, nickel content ≥ 1.5%, high nickel recovery rate; ③ ferronickel method, suitable for processing magnesian ore, nickel content ≥ 1.5%, comprehensive recovery of iron; ④ matte smelting method , suitable for processing magnesia ore, containing nickel ≥ 2.0%, and the recovery rate of nickel is high. Due to the disadvantages of large investment, high operating costs, limited range of ...

Claims

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Application Information

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IPC IPC(8): C01G53/11
Inventor 曹国华
Owner 曹国华
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