Method for preventing electrolytic cementation of spent hard metal anode plates

By adding dispersants, antioxidants, and nonionic surfactants to the electrolyte and combining them with ultrasonic vibration, the problem of cemented carbide block caking during electrolysis was solved, improving electrolysis efficiency and the dissolution rate of cobalt and other binder phases, and ensuring easy extraction and high purity of the electrolysis products.

CN118026177BActive Publication Date: 2026-07-10HUBEI GREEN TUNGSTEN CO LTD
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Patent Information

Application Number
CN202410080086.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-19
Publication Date
2026-07-10
Estimated Expiration
2044-01-19

AI Technical Summary

Technical Problem

During the electrolytic recycling of waste cemented carbide, cemented carbide blocks are prone to forming clumps, which affects electrolysis efficiency and cobalt dissolution rate, and the clumps are difficult to remove from the electrolytic cell.

Method used

Adding dispersants, antioxidants, and nonionic surfactants to acidic electrolytes, combined with ultrasonic vibration, can inhibit oxide precipitation and control the dissolution rate of the binder phase, thus preventing caking.

Benefits of technology

It effectively reduces caking, improves electrolysis efficiency and the dissolution rate of binder phases such as cobalt, and makes the electrolysis products easier to remove and of higher purity.

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Abstract

The application discloses a method for preventing hard alloy waste from hardening in electrolysis, which comprises the following steps: providing an electrolytic tank, adding electrolyte into the electrolytic tank, immersing the hard alloy waste into the electrolyte, and performing electrolysis by taking the hard alloy waste as an anode and an inert electrode as a cathode; wherein the electrolyte comprises the following components with the following concentrations: 100-350 g / L of acid electrolyte, 0.5-2.5 g / L of dispersant, 0.1-1 g / L of non-ionic surfactant, 3-10 g / L of antioxidant and water. The method can overcome the hardening problem in the electrolysis process.
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Citation Information

Patent Citations

  • Process for the electrolyte disintegration of cemented carbide material

    GB776045A

  • Method for in-situ synthesis of tungsten carbide powder

    US20230193488A1