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A method of microwave calcining zinc hydrometallurgy to purify cobalt-nickel slag to produce cobalt concentrate

A hydrometallurgy, cobalt-nickel slag technology, applied in the field of hydrometallurgy applications, can solve the problems of only considering the recycling of metal zinc, little research and extraction of cobalt, no effective extraction methods, etc., to solve safety and environmental protection problems, high efficiency. Technical level and economic value, the effect of strong applicability

Active Publication Date: 2020-03-27
YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the research and practice of this method, it was found that the cobalt in the purified cobalt-nickel slag has low grade and no effective extraction means. Domestic zinc smelting enterprises basically only consider the recycling of metal zinc, and there are few researches and extraction technologies for cobalt.

Method used

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  • A method of microwave calcining zinc hydrometallurgy to purify cobalt-nickel slag to produce cobalt concentrate

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 100g of purified cobalt-nickel slag (0.3% cobalt content, 40% zinc content, 15% water content), and take industrial grade NH 4 Dissolve 5g of Cl in 200ml of water, mix cobalt nickel slag with NH 4 Cl was fully mixed and chlorinated at a dry weight ratio of 20:1 for 45 minutes; the cobalt-nickel slag was calcined in an industrial microwave oven at a temperature of 500°C for 45 minutes. The calcined cobalt-nickel slag is naturally cooled to normal temperature, and then ground, and the ground material is 60g, and the particle size is more than 200 mesh, which is more than 87%; at normal temperature, the ground material is neutrally leached for 3 hours according to the liquid-solid ratio of 10:1, and filtered; Add precipitant Na to the filtered solution according to 2 times the cobalt content 2 S was used for replacement precipitation, the precipitation temperature was controlled at 50°C, and the precipitation stirring time was 0.5h; after the precipitation was suffic...

Embodiment 2

[0023] Take 100g of purified cobalt-nickel slag (1.0% cobalt content, 38% zinc content, 14% water content), take industrial grade NH 4 Dissolve 2.5g of Cl in 200ml of water. Cobalt nickel slag NH 4 Cl was fully mixed and chlorinated at a dry weight ratio of 40:1 for 60 minutes; the cobalt-nickel slag was calcined in an industrial microwave oven at a temperature of 900°C for 20 minutes. The calcined cobalt-nickel slag is naturally cooled to normal temperature, and then ground. The ground material is 55g, and the particle size is over 200 mesh, and the percentage is more than 90%. The ground material is neutrally leached for 4 hours at a liquid-solid ratio of 15:1 at room temperature. Add precipitant Na to the filtered solution according to 1.3 times the cobalt content 2 S was used for replacement precipitation, the precipitation temperature was controlled at 60°C, and the precipitation stirring time was 1h; after the precipitation was sufficient, the solution was filtered and...

Embodiment 3

[0025] Take 100g of purified cobalt-nickel slag (0.5% cobalt content, 35% zinc content, 15.5% water content), and take industrial grade NH 4 Cl 4g was dissolved in 200ml of water. The cobalt-nickel slag was fully mixed and chlorinated with NH4Cl at a dry weight ratio of 25:1 for 50 minutes; the cobalt-nickel slag was calcined in an industrial microwave oven at a temperature of 700°C for 30 minutes. The calcined cobalt-nickel slag was naturally cooled to normal temperature, and then ground. The ground material was 57g, and the particle size was more than 88% over 200 mesh. The ground material was neutrally leached for 3.5 hours at a liquid-solid ratio of 12:1 at room temperature. Add precipitant Na to the filtered solution according to 1.4 times the cobalt content 2 S was used for replacement precipitation, the precipitation temperature was controlled at 55°C, and the precipitation stirring time was 45 minutes; after the precipitation was sufficient, the solution was filtered ...

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Abstract

The invention relates to a method for producing cobalt concentrate by smelting and purifying cobalt-nickel slag through a microwave calcining zinc wet process, and belongs to the field of hydrometallurgy application. The method comprises the specific steps that a NH4Cl aqueous solution is added into purified cobalt-nickel slag, and the materials are mixed to be uniform; then microwave calcining iscarried out, and grinding is carried out after calcining is carried out; the ground cobalt-nickel slag is subjected to neutral leaching and filtering; Na2S is added into an obtained lixivium, and cobalt is precipitated; water is added into an obtained filter cake, and pulpifying and filtering are carried out, and filtrate and liquid obtained after precipitation are returned to be subjected to neutral leaching for use; secondary filter cakes are returned to a zinc concentrate bin to be dosed, and metal zinc is recycled; and cobalt precipitated through Na2S is washed with dilute acid, and the cobalt concentrate is obtained. According to the method, the characteristic that cobalt has high microwave absorbing capacity is utilized, the cobalt-nickel slag is subjected to microwave irradiation after being chloridized by chlorine salt, cobalt is selectively leached through the neutral aqueous solution, then cobalt is precipitated and washed through a chemical method, and the cobalt concentrate is obtained; and zinc in the cobalt-nickel slag enters a wet process procedure, and multiple kinds of metal are comprehensively recycled.

Description

technical field [0001] The invention relates to a method for producing cobalt concentrate by microwave-calcining zinc hydrometallurgy to purify cobalt-nickel slag, and belongs to the technical field of hydrometallurgy application. Background technique [0002] Cobalt is a magnetic material with strong wave-absorbing properties. It is mainly used in the production of high-temperature alloys, heat-resistant and corrosion-resistant alloys, hard alloys, and magnetic materials. It is also often used in the form of cobalt powder and cobalt compounds in chemicals, ceramics, Industries such as batteries, glass and medical. Cobalt is mainly associated or symbiotic in copper ore, copper-nickel ore and lead-zinc ore. At present, there are three ways to extract metal cobalt in China: one is to comprehensively recover from copper-nickel ore; the other is to extract from imported arsenic-cobalt ore, cobalt-sulfur concentrate and cobalt ore; the third is to extract from cobalt-containing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/00C22B1/02
CPCC22B23/005C22B23/0407C22B23/0469
Inventor 李国江毛金龙马爱元杨跃红蒋绍康刘贤沈徐松邓海波
Owner YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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