Method for extracting tungsten carbide and cobalt from waste hard alloy

A technology of cemented carbide and tungsten carbide, which is applied in the direction of carbide, tungsten/molybdenum carbide, nickel halide, etc., can solve the problems of poor flow of electrolytic solution, etc., and achieve pollution problems, uniform heating, and increased contact area effect

Active Publication Date: 2018-11-30
湖南金雕能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problem of the poor flow state of the electrolytic solution in the prior art by providing a method for extracting tungsten carbide and cobalt from

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  • Method for extracting tungsten carbide and cobalt from waste hard alloy
  • Method for extracting tungsten carbide and cobalt from waste hard alloy
  • Method for extracting tungsten carbide and cobalt from waste hard alloy

Examples

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Example Embodiment

[0034] Example 1

[0035] Use a ball mill to crush the hard waste alloy. When the cobalt content of the hard waste alloy is less than 11%, the crushed particle size is 4mm; when the cobalt content is greater than 11%, the crushed particle size is 8mm. Then the hard waste alloy particles are packed Put into the electrolysis small box and place it in the electrolytic tank for electrolysis, add 2.0mol / L hydrochloric acid as the electrolyte, use a 9kw750A rectifier, control the voltage of the electrolysis small box to 0.85V, the current is 10A, start the heater, control the electrolyte The temperature is 43℃, the electrolyte is continuously circulated under the action of the acid-proof pump, the cobalt is electrolyzed to form a cobalt chloride solution, Co+2HCl=CoCl 2 +H 2 , The un-electrolyzed alloy particles remain in the electrolysis small frame; when the specific gravity of cobalt chloride in the electrolytic solution reaches 1.24kg / dm 3 When the electrolytic solution containing c...

Example Embodiment

[0036] Example 2

[0037] Use a ball mill to crush the hard waste alloy. When the cobalt content of the hard waste alloy is less than 11%, the crushed particle size is 2mm. When the cobalt content is greater than 11%, the crushed particle size is 6mm. Then the hard waste alloy particles are packed Put into the electrolysis box and place it in the electrolysis tank for electrolysis, add 2.2mol / L hydrochloric acid as the electrolyte, use a 9kw750A rectifier, control the voltage of the electrolysis box to 1V, the current is 10A, start the heater, and control the electrolyte The temperature is 40℃, the electrolyte is continuously circulated under the action of the acid-proof pump, and the cobalt is electrolyzed to form a cobalt chloride solution, Co+2HCl=CoCl 2 +H 2 , The un-electrolyzed alloy particles remain in the electrolysis small frame; when the specific gravity of cobalt chloride in the electrolytic solution reaches 1.20kg / dm 3 When the electrolytic solution containing cobalt c...

Example Embodiment

[0038] Example 3

[0039] A ball mill is used to crush the hard waste alloy. When the cobalt content of the hard waste alloy is less than 11%, the crushed particle size is 6mm. When the cobalt content is greater than 11%, the crushed particle size is less than 10mm, and then the hard waste alloy particles Put it into the electrolysis chamber and place it in the electrolysis tank for electrolysis, add 2.4mol / L hydrochloric acid as the electrolyte, use a 9kw 750A rectifier, control the electrolysis chamber voltage to 0.9V, current 10A, start the heater, control The temperature of the electrolyte is 45℃, and the electrolyte is continuously circulated under the action of the acid-proof pump, and the cobalt is electrolyzed to form a cobalt chloride solution, Co+2HCl=CoCl 2 +H 2 , The un-electrolyzed alloy particles remain in the electrolysis small frame; when the specific gravity of cobalt chloride in the electrolytic solution reaches 1.15kg / dm 3 When the electrolytic solution containi...

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Abstract

The invention provides a method for extracting tungsten carbide and cobalt from waste hard alloy, and belongs to the technical field. The method comprises the following steps: S1, crushing a hard waste alloy into particles, then loading into an electrolytic small box, placing in an electrolysis tank, electrolyzing, adding hydrochloric acid as an electrolyte solution, starting up a heater, and electrolyzing the electrolyte solution cyclically continuously under the action of an acid-resistant pump; S2, when the specific gravity of cobalt chloride in the electrolyte solution reaches 1.15-1.24 kg/dm<3>, pumping the electrolyte solution containing cobalt chloride into a storage tank, soaking the alloy particles with clear water, and then drying the alloy particles; and S3, carrying out magnetic separation of the dried alloy particles, smashing a cobalt-containing magnetic absorption material into particles with the diameter of 1-6 mm by an air heavy hammer, then loading into the electrolysis tank, electrolyzing again, and separating to obtain tungsten carbide and a cobalt chloride solution. By improvement of the electrolysis tank and the electrolytic process, the cobalt content in thefinished tungsten carbide product after electrolysis is completed is about 0.07%.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas alloy extraction, and in particular relates to a method for extracting tungsten carbide and cobalt from waste cemented carbide. Background technique [0002] Cemented carbide is mainly made of tungsten carbide and rare metal cobalt, and its economic value and manufacturing cost are relatively high. The recovery of tungsten and cobalt is a very valuable recycling field. The earliest recycling process has high energy consumption, complicated equipment and great impact on the environment. Electrochemical method, there are different process routes using alkali as dielectric, hydrochloric acid or sulfuric acid, and nitric acid as dielectric. The electrochemical method has simple process, low investment, low cost, high efficiency, low labor intensity, and less pollution. Tungsten carbide products It can be returned to hard alloy production directly or after reduction. Cobalt is dissolved f...

Claims

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Application Information

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IPC IPC(8): C01G53/09C01B32/949
CPCC01B32/949C01G53/09C01P2006/80
Inventor 梁培君罗荣华
Owner 湖南金雕能源科技有限公司
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