Method for treating and recycling tungsten-containing wastewater

Through chemical agent reaction and physical sedimentation, the tungsten-containing wastewater generated by the tungsten wet smelting process is treated, and the wastewater is decontaminated and recycling of tungsten resources is realized. The tungsten powder is used to prepare cemented carbide tools, which solves the problems of environmental pollution and resource waste and achieves a win-win situation between resource economy and environmental protection.

CN119750732APending Publication Date: 2025-04-04KONFOONG MATERIALS INTERNATIONAL CO LTD
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Patent Information

Application Number
CN202411830337.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-12
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

In the prior art, tungsten-containing wastewater generated by the tungsten wet smelting process is not effectively recycled and reused, resulting in environmental pollution and waste of resources.

Method used

By adjusting the pH value of wastewater, calcium-containing ion solution, polymer aluminum chloride solution and polyacrylamide solution are added to achieve the coagulation and settlement of impurities, and then the tungsten powder is recovered through the calcination and post-treatment process.

Benefits of technology

The tungsten-containing wastewater is treated to emission standards, and the recycling and reuse of tungsten powder is achieved through the refining and roasting process, reducing environmental pollution and resource waste, and achieving a win-win situation between resource economy and environmental protection.

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Abstract

The invention relates to a method for treating and recycling tungsten-containing wastewater. The method comprises the following steps: (1) adjusting the pH value of the tungsten-containing wastewater to be alkaline; (2) sequentially adding a calcium ion-containing solution, a polyaluminum chloride solution and a polyacrylamide solution into the tungsten-containing wastewater, and carrying out sedimentation and filter pressing separation to obtain a water sample and a tungsten-containing sludge sample; and (3) the obtained tungsten-containing sludge sample is subjected to roasting and post-treatment, and the recycled tungsten powder is obtained. According to the method, the polyaluminum chloride solution and the polyacrylamide solution cooperate to achieve the purpose of accelerating coagulation and sedimentation of impurities in the tungsten-containing wastewater, the tungsten-containing wastewater is treated to reach the emission standard, the tungsten-containing sludge is refined and reused again, tungsten powder is recycled and reused, the recycled tungsten powder can be used for preparing hard alloy tools and the like, and the method is suitable for industrial production. And a win-win situation of resource economy and environmental protection is realized.
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