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Method for enriching cobalt from zinc hydrometallurgy purification slag

A technology of hydrometallurgy and enrichment, which is applied to the improvement of process efficiency, instruments, optics, etc., can solve the problems of complex metal components in the purification slag and inability to dissociate pure cobalt components well, so as to save cost and input , Short extraction cycle, high purity effect

Pending Publication Date: 2022-08-05
安阳锦越新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with the application number CN201811319116.6 discloses a method for recovering cobalt from zinc powder purification slag. The slurry is obtained by wet ball milling the zinc powder purification slag; the slurry is separated by magnetic separation, and the magnetic component is rich Cobalt slag and magnetic separation tailings are returned to the zinc smelting system to recover zinc; although this method is simple in process and produces no three wastes, the metal components in the purification slag are complex and cannot be well dissociated into pure cobalt components

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  • Method for enriching cobalt from zinc hydrometallurgy purification slag

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Embodiment 1

[0028] A method for enriching cobalt from zinc hydrometallurgy purification slag, such as figure 1 shown, including the following steps:

[0029] (1) The purified slag (mainly containing Zn, Cd, Cu, and Co, including Zn 25.36% and Co 4.40%) was treated by atmospheric pressure leaching of 10% sulfuric acid. The leaching temperature was 45 °C, the leaching time was 30 min, and the liquid-solid ratio 5:1, through solid-liquid separation, the leaching solution containing zinc and cobalt and the leaching residue containing zinc, copper and cadmium are obtained (return to zinc hydrometallurgy); the leaching solution containing zinc and cobalt is determined by atomic absorption spectrometry, and the leaching of zinc The leaching rate of cobalt is 83.5%, and the leaching rate of cobalt is 92.3%;

[0030] (2) The pH of the leaching solution containing zinc and cobalt obtained in step (1) was adjusted to 4 with NaOH solution, and the organic phase (15wt% P204) was extracted by using P2...

Embodiment 2

[0042] On the basis of Example 1, the magnetic solid phase described in step (6) is formed by using ferrite as the magnetic core, and the surface is sequentially silanized and amine group grafted, as follows:

[0043] Pulverize and sieve the ferrite to obtain ferrite powder with a particle size of 1250 mesh (common commercial products are used, the specific saturation magnetic moment is about 10~70 Am / kg, and the coercive force is 80~600 A / m), washed with water After controlling the dry water content, vacuum drying for 2 h; then disperse 15 g of ferrite powder in 250 mL of a mixture of ethanol and acetone (v:v=7:3), under a nitrogen atmosphere, heat up to 60 °C, Then add 10 mL of γ-aminopropyltrimethoxysilane, keep the solution system closed and reflux, stir at constant temperature for 8 hours, then separate the solid from the liquid, wash the solid with ethanol, and vacuum dry it at 90 °C for 4 hours to obtain silanized magnetic powder; Disperse 10 g of silanized magnetic pow...

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Abstract

The invention discloses a method for enriching cobalt from zinc hydrometallurgy purification slag, which comprises the following steps: carrying out normal pressure leaching treatment on the purification slag by adopting sulfuric acid to obtain a leaching solution containing zinc and cobalt and leaching slag; the method comprises the following steps: carrying out primary extraction on a leaching solution containing zinc and cobalt to obtain a primary extraction solution and a primary extraction raffinate, washing the primary extraction solution to obtain a loaded organic phase and a washing water phase, returning the primary extraction raffinate to leaching treatment for circulation, combining the circulated primary extraction raffinate with the washing water phase, and carrying out re-extraction to obtain a re-extraction solution and a re-extraction raffinate; and after the loaded organic phase and the re-extraction liquid are subjected to reverse extraction, zinc is recycled through electrolytic deposition, and cobalt is enriched in the re-extraction raffinate through a magnetic solid phase. The method has the advantages of simple process, no special equipment requirement, easy realization of industrialization, cost input saving, no introduction of new impurities in the extraction and other processes, high purity of the recovered zinc, few impurities, creation of favorable conditions for effective utilization of the cobalt through the enrichment of the cobalt, and very good economic value.

Description

technical field [0001] The invention belongs to the technical field of metal recovery, and in particular relates to a method for enriching cobalt from zinc hydrometallurgy purification slag. Background technique [0002] Cobalt metal is widely used in aerospace, machinery manufacturing, chemical and ceramics industries. With the development of my country's economy, the consumption of cobalt continues to increase, but my country's cobalt resources are scarce, and large-scale cobalt-bearing deposits are scarce. Most of the cobalt is associated with other metal deposits in lower grades. At present, in the process of mining and utilization of metallic zinc, it is found that a small amount of cobalt associated with zinc ore is enriched in the process of beneficiation of zinc ore, and then separated in the form of purified slag in the process of zinc hydrometallurgy. With the continuous expansion of my country's hydrometallurgical zinc production capacity, the purification slag (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/20C22B23/00C22B3/38C25C1/16
CPCC22B7/007C22B19/22C22B23/043C22B3/3846C22B3/384C25C1/16Y02P10/20
Inventor 梁秀平鲍兴军郭小明张书营
Owner 安阳锦越新材料有限公司