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Zinc and cobalt separation method

A separation method, zinc-cobalt technology, applied in the field of metal smelting, can solve the problems of no advantages, high production consumption, difficult processing, etc., and achieve the effect of low production cost, low consumption and high efficiency of impurity removal

Active Publication Date: 2016-11-16
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the above-mentioned prior art that the processing is difficult, the cost is high, the production consumption is large, the amount of waste water is large, and there is no advantage in processing materials with high zinc and cobalt content, the present invention provides a method for separating zinc and cobalt

Method used

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Examples

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Effect test

Embodiment 1

[0013] A method for separating zinc and cobalt. Among the zinc and cobalt materials, by mass percentage: the slag contains 10% cobalt, 25% zinc, 0.8% iron, 0.3% copper, and 1.8% cadmium. The method includes the following steps.

[0014] Step 1 Leaching: Add high zinc and cobalt slag to sulfuric acid with a sulfuric acid concentration of 20% for leaching, with a liquid-solid ratio of 3:1, stir and heat to 95 degrees Celsius; after 1 hour of reaction, cobalt, zinc, iron, copper, and cadmium in the slag The metal is transferred into the solution in the form of sulfate, and the leachate A is obtained by filtration;

[0015] Step 2: Remove iron, copper, and cadmium in one step: add zinc powder 2g / L to the leaching solution A to reduce ferric iron, then add sodium hydroxide to adjust the pH to 3.0, heat to 90 degrees Celsius, and slowly oxidize iron with air, and react for 3 hours. And slowly add sodium carbonate to precipitate iron, control the final pH to 4.0, add zinc powder 10g / ...

Embodiment 2

[0019] A zinc-cobalt separation method, wherein the zinc-cobalt material contains 8% cobalt, 20% zinc, 0.6% iron, 0.4% copper, and 1.2% cadmium. The method comprises the following steps:

[0020] Step 1 Leaching: Add high zinc and cobalt slag to sulfuric acid with a sulfuric acid concentration of 15% for leaching, with a liquid-solid ratio of 3:1, stir and heat to 90 degrees Celsius; after 2 hours of reaction, cobalt, zinc, iron, copper, and cadmium in the slag The metal is transferred into the solution in the form of sulfate, and the leachate A is obtained by filtration;

[0021] Step 2: Remove iron, copper, and cadmium in one step: Add 2g / L of zinc powder to the leaching solution A to reduce ferric iron, then add sodium hydroxide to adjust the pH to 2.8, heat to 95 degrees Celsius, add hydrogen peroxide to slowly oxidize iron, and react for 2 hours. Slowly add sodium carbonate to precipitate iron, control the final pH to 4.0, add zinc powder 8g / L to replace copper and cadmiu...

Embodiment 3

[0025] A zinc-cobalt separation method, wherein the zinc-cobalt material contains 20% cobalt, 30% zinc, 5% iron, 2% copper, and 3% cadmium. The method comprises the following steps:

[0026] Step 1 Leaching: Add high zinc and cobalt slag to sulfuric acid with a sulfuric acid concentration of 15% for leaching, with a liquid-solid ratio of 3:1, stir and heat to 90 degrees Celsius; react for 2 hours to cobalt, zinc, iron, copper, and cadmium metals in the slag Into the solution in the form of sulfate, filtered to obtain leachate A;

[0027] Step 2 Remove iron, copper, and cadmium in one step: Add 2.5g / L zinc powder to the leaching solution A to reduce ferric iron, then add sodium hydroxide to adjust the pH to 3.0, heat to 95 degrees Celsius, add hydrogen peroxide to slowly oxidize iron, and react for 2 hours , and slowly add sodium carbonate to precipitate iron, control the final pH to 4.0, add zinc powder 6g / L to replace copper and cadmium after cooling to 50 degrees Celsius, fi...

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Abstract

The invention provides a zinc and cobalt separation method. The zinc and cobalt separation method specifically includes the steps that 1, most metal in slag with high content of zinc and cobalt enters leaching solutions in a leaching mode, the leaching rate reaches 95% of above, and the metal recovery rate is high; 2, iron, copper and cadmium are removed in a combined mode, the purification process is simplified, the content of the iron, the copper and the cadmium in the solutions can be lowered to 5 mg / L or below, and the purification efficiency is high; 3, preliminary separation of the zinc and the cobalt is realized, the technology is simple, and the operation is easy; and 4, residual zinc is further removed, and complete separation of the zinc and the cobalt is realized. According to the method, the technology is simple, separation of the zinc and the cobalt is complete, the consumption is small, the production cost is low, and the recovery rate of the zinc and the cobalt in materials containing the zinc and the cobalt can reach 90% or above.

Description

technical field [0001] The invention relates to the technical field of metal smelting, and relates to the treatment of high-cobalt slag in the zinc hydrometallurgy process, in particular to a zinc-cobalt separation method for the high-cobalt slag obtained in the zinc hydrometallurgy process. Background technique [0002] Cobalt production raw materials can be divided into two categories: cobalt minerals and cobalt waste, among which cobalt waste is obtained from cobalt slag obtained from nickel and zinc smelting systems, or waste alloys, battery materials, catalysts, etc. In the process of zinc hydrometallurgy, cobalt is a very harmful impurity element. The leaching solution can only be returned to electrolysis after purification and removal of cobalt. After the purified cobalt slag is oxidized and acid leached, cobalt is further enriched to produce high-cobalt slag. The high-cobalt slag contains 20-25% zinc, 6-12% cobalt, and iron, copper, cadmium and other metals. Because...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B3/08C22B3/46C22B3/44
CPCC22B7/007C22B7/04Y02P10/20
Inventor 张恩玉余江鸿
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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