Normal-pressure leaching method for high-grade nickel matte and nickel sulfate

A leaching, atmospheric pressure technology, applied in the direction of nickel sulfate, process efficiency improvement, etc., can solve the problems of high oxidant consumption, high manufacturing cost, large equipment volume, etc., to improve mass transfer efficiency, leaching process safety, and improve leaching. rate effect

Active Publication Date: 2021-11-02
HUNAN CNGR NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a nickel raw material, high-matte nickel belongs to the sulfide eutectic of nickel, copper, cobalt, iron and other metals. Nickel, copper, and cobalt mainly exist in sulfide phase and a small amount of alloy phase. High consumption, high cost
Although the existing technology mentions

Method used

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  • Normal-pressure leaching method for high-grade nickel matte and nickel sulfate
  • Normal-pressure leaching method for high-grade nickel matte and nickel sulfate
  • Normal-pressure leaching method for high-grade nickel matte and nickel sulfate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0066] Example 1

[0067] Grinding: 5kg of nickel matte (available from Jilinjien Nickel Co., Ltd.) using a ball mill to 150 mesh, nickel matte component detection results shown in Table 1.

[0068] Table 1 detection result of the component nickel matte

[0069] CO% Mn% Ni% Cu% FE% Al％ 1.17 0.0028 60.29 12.59 3.28 0.0005 CA% MG% As% S％ Zn% Hide 2 O%

[0070] A first atmospheric leaching: nickel matte with water polishing according nickel matte mass (kg) and water volume (L) is a ratio of 1: 8 slurrying (water 40L), slurried completion After addition of concentrated sulfuric acid to control the leaching pH value was maintained at 1.0, supplemented with ultrasound leaching tank leaching oxygen tank leaching, during leaching the slurry through a sand return equipment tank leaching, the leaching continuous cycle, ultrasonic frequency 40kHz, oxygen flux 30m 3 / (H * t dry matter), 90.5% oxygen concentration, solvent extraction and solid-liquid separation...

Example Embodiment

[0073] Example 2

[0074] Example 1 differs from the embodiment only in that:

[0075] A first atmospheric leaching: nickel matte with water polishing according nickel matte mass (kg) and the volume of water (L) in the ratio of 1: 6 slurry (water 30L), slurried completion After addition of concentrated sulfuric acid to control the leaching pH value was maintained at 1.2, supplemented with ultrasonic oxygen leaching tank leaching, during leaching tank leaching the slurry through a sand return equipment tank leaching, the leaching continuous cycle, ultrasonic frequency 50kHz, oxygen flux 20m 3 / (H * ton dry material), 88% oxygen concentration, solvent extraction and solid-liquid separation to obtain a first 9h leach liquor and a first leach residue, a nickel-containing slag by accounting, the first atmospheric leaching of nickel leaching rate reached 53.29% .

[0076] The second atmospheric leaching: a first leach residue with water in a first leaching residue mass (kg) and the vol...

Example Embodiment

[0078] Example 3

[0079] The difference is that Example 1:

[0080] A first atmospheric leaching: nickel matte with water polishing according nickel matte mass (kg) and the volume of water (L) is a ratio of 1:10 slurry (water 50L), slurried completion After addition of concentrated sulfuric acid to control the leaching pH value was maintained at 0.5, supplemented with ultrasonic oxygen leaching tank leaching, during leaching tank leaching the slurry through a sand return equipment tank leaching, the leaching continuous cycle, ultrasonic frequency 80kHz, oxygen flux 50m 3 / (H * ton dry material), 95% oxygen concentration, solvent extraction and solid-liquid separation to obtain a first 6h leach liquor and a first leach residue, a nickel-containing slag by accounting, the first atmospheric leaching of nickel leaching rate reached 55.52% .

[0081] The second atmospheric leaching: a first leach residue with water in a first leaching residue mass (kg) and the volume of water (L) rat...

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Abstract

The invention provides a normal-pressure leaching method for high-grade nickel matte and nickel sulfate.The method comprises first normal-pressure leaching and second normal-pressure leaching, ultrasonic waves and oxygen are applied in the first normal-pressure leaching process and the second normal-pressure leaching process, on one hand, no hydrogen peroxide is consumed, the leaching cost is low, and the risks of transportation, storage and process management and control are avoided; on the other hand, the stability of the raw materials in the leaching process is destroyed, the raw materials are prevented from being wrapped by leaching liquid, the activity is prevented from being reduced, the Ni leaching rate in the normal-pressure leaching process is increased, the material throughput of a high-pressure leaching system is greatly reduced, the volume design quantity of an autoclave is small, and production control is safer; and finally, oxygen is promoted to be in efficient contact with the raw materials and hydrogen sulfide generated in the leaching process, hydrogen sulfide can be rapidly converted into sulfuric acid, the treatment risk of hydrogen sulfide gas is effectively reduced, and the leaching process is safer.

Description

technical field [0001] The application relates to the technical field of hydrometallurgy, in particular to a high-pressure nickel matte leaching method and nickel sulfate. Background technique [0002] In the current development of ternary batteries, the tendency of high nickel is becoming more and more obvious. High nickel and reduced cobalt can increase the energy density of the battery and reduce the cost of the battery. As a nickel raw material, high-matte nickel belongs to the sulfide eutectic of nickel, copper, cobalt, iron and other metals. Nickel, copper, and cobalt mainly exist in sulfide phase and a small amount of alloy phase. High consumption and high cost. Although the existing technology mentions atmospheric pressure + high pressure leaching, the leaching rate in the normal pressure process is low, only 30-50%, and the material throughput of the subsequent high pressure leaching system is still large, the equipment is bulky, the manufacturing cost is high, and...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C01G53/10
CPCC22B7/007C22B23/043C01G53/10Y02P10/20
Inventor 刘增威王博宇肖超訚硕
Owner HUNAN CNGR NEW ENERGY TECH CO LTD
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