Method for treating normal pressure leaching of transitional nickel laterite ore

A nickel laterite and transitional technology, which is applied in the field of atmospheric pressure leaching of transitional nickel laterite and nickel laterite processing, can solve the problems of low nickel leaching rate, difficult liquid-solid separation, and failure to meet discharge standards.

Inactive Publication Date: 2013-06-05
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the developed atmospheric pressure leaching technology still has various problems such as low nickel leaching rate, difficulty

Method used

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  • Method for treating normal pressure leaching of transitional nickel laterite ore
  • Method for treating normal pressure leaching of transitional nickel laterite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The chemical composition of the transitional nickel laterite used is .

[0017] chemical composition Ni co Fe 2 o 3 SiO 2 MgO CaO Al 2 o 3 Content (mass%) 1.51 0.09 54.5 25.60 10.51 1.65 2.85

[0018] The transitional nickel laterite ore with this composition has a particle size of -200 mesh, accounting for 80%, water content of 30%, adding 75% concentrated sulfuric acid, a liquid-solid ratio of 4:1, a temperature of 95°C, and a pH of 3.0. leaching and removing iron for 2.5 hours at the same time. After leaching, liquid-solid separation was performed, and the leaching residue was washed at 90°C with a liquid-solid ratio of 2:1. The volume of the leaching liquid and the washing liquid were measured separately and the nickel content was assayed. Heavy, test the nickel content. The test results show that the leaching rate of nickel is 89.44%, and the leaching rate of cobalt is 72.43%.

Embodiment 2

[0020] The chemical composition of the transitional nickel laterite used is .

[0021] chemical composition Ni co Fe 2 o 3 SiO 2 CaO Al 2 o 3 MgO Content (mass%) 1.46 0.078 53.87 24.60 2.65 3.85 12.51

[0022] The treatment process is the same as in Example 1, and the technical conditions are: laterite ore particle size -200 mesh accounts for 85%, material moisture content is 35%, particle size is -200 mesh and accounts for 85%, adding 80% concentrated sulfuric acid, the liquid-solid ratio is 4: 1. Under the conditions of temperature 95°C and pH control of 3.5, leaching simultaneously removes iron for 2.5 hours. After leaching, liquid-solid separation is performed, and the leaching residue is washed at 90°C with a liquid-solid ratio of 2:1. The leaching solution and lotion were measured in volume and tested for nickel content, and the leaching residue was weighed after drying to test for nickel content. The test results show that...

Embodiment 3

[0024] The chemical composition of the transitional nickel laterite used is .

[0025] chemical composition Ni co Fe 2 o 3 SiO 2 CaO Al 2 o 3 MgO Content (mass%) 1.57 0.078 52.87 23.60 1.65 3.85 12.41

[0026] The treatment process is the same as in Example 1, and the technical conditions are: laterite ore particle size -200 mesh accounts for 85%, the material contains 40% water, the particle size is -200 mesh and accounts for 80%, and the concentrated sulfuric acid with a feed rate of 80% is added, and the liquid-solid ratio is 4: 1. Under the conditions of temperature 95°C and pH control of 3.0, leaching simultaneously removes iron for 2.5 hours. After leaching, liquid-solid separation is performed, and the leaching residue is washed at 80°C with a liquid-solid ratio of 2:1. The leachate and washing liquid are measured separately The nickel content was tested by volume, and the leaching slag was dried and weighed to test the nic...

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Abstract

A method for treating normal pressure leaching of transitional nickel laterite ore is characterized by comprising two steps which can simultaneously conduct pretreatment and leaching of the nickel laterite ore. The two steps are as follows: (1) pretreatment of the nickel laterite ore and ore grinding: breaking the nickel laterite ore and grinding the ore, adjusting the moisture content, adding concentrated sulfuric acid, and placing the mixed nickel laterite ore for spare after fully being fully stirred; and (2) leaching and deironing: blending magnesium oxide after smashing the block-shaped pretreated materials, adding the blended materials into aqueous solution after being fully and uniformly mixed, conducting the process of Ni-Co leaching and deironing simultaneously, maintaining the liquid-solid ratio, the solution temperature and the solution of the potential hydrogen (pH) value, and conducting liquid-solid separation after being stirred. The normal pressure leaching technology treats the nickel laterite ore which contains 0.8-1.5% of nickel, the leaching rate of nickel can reach above 85%, the leaching rate of cobalt is above 70%, and the liquid-solid separation is easy to carry out. The main phase composition of the leached sunk iron slag after washing is goethite (FeOOH), MgSiO3 and SiO2, no harmful ingredients are contained, and the sunken iron slug can be piled or reutilized.

Description

technical field [0001] The invention relates to a method for treating nickel laterite ore, in particular to a method for treating transitional nickel laterite ore under normal pressure leaching, and belongs to the field of hydrometallurgy. The present invention adopts pretreatment-leaching simultaneous iron-precipitation technology to carry out normal-pressure acid leaching of transitional nickel laterite ore, and obtains two products of leaching solution and leached iron slag, the leached iron slag is discharged after being washed with water, and the leaching solution is treated according to the general technology and then precipitated The nickel-cobalt precipitate produced is sold as a product, and the precipitated liquid is used for washing iron slag after adding lime and magnesium. The calcium-magnesium precipitate can be stacked and reused. Background technique [0002] The minable part of nickel laterite ore is generally composed of limonite layer, transition layer and...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B1/00C22B23/00
CPCY02P10/20
Inventor 王德全丛自范舒方霞李辉刘凯华刘岩
Owner SHENYANG RES INST OF NONFERROUS METALS
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