Method for harmlessly treating arsenic in arsenic-containing waste liquid

A technology of waste liquid and arsenic precipitation, which is applied in the fields of chemical instruments and methods, metallurgical wastewater treatment, arsenate/arsenite, etc., can solve the problems that affect the leaching toxicity stability of mixed arsenic slag, high acidity of scorodite precipitation, Solve the problems of large amount of scorodite mixed slag, etc., to achieve the effect of reducing the amount of arsenic fixation solution, economical treatment cost, and low risk of environmental pollution
CN112897739AInactive Publication Date: 2021-06-04ZIJIN MINING GROUP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZIJIN MINING GROUP
Publication Date
2021-06-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for harmlessly treating arsenic in arsenic-containing waste liquid, which is characterized in that the arsenic-containing waste liquid is harmlessly treated by adopting a process of settling iron arsenite, oxidizing and settling arsenic and deeply settling arsenic, the arsenic is solidified in a most stable scorodite form and enters a landfill for landfill, and the treated waste liquid can be directly recycled or discharged. The method can be suitable for harmless treatment of arsenic in arsenic-containing solutions with various concentrations.
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Description

technical field

[0001] The invention relates to the fields of nonferrous metal smelting and environmental protection, in particular to a method for harmless disposal of arsenic-containing waste liquid. Background technique

[0002] The harmless disposal of arsenic-containing wastewater has always been the focus of smelting enterprises. As people pay more attention to environmental protection and environmental protection policies are becoming stricter, wastewater disposal has become a hurdle that restricts the development of enterprises.

[0003] At present, the existing arsenic-containing wastewater treatment methods mainly have the following directions: (1) Preparation of products, such as copper arsenate, diarsenic trioxide, elemental arsenic, etc., but due to the small market for the products, the products that cannot be sold in time are piled up in the warehouse, which poses a safety hazard , and the process has problems such as high production cost at the same time. Th...

Claims

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