Method for solidifying arsenic by using copper slag
By adding arsenic-containing substances and sulfuric acid solution to copper slag, insoluble compounds are formed to solidify arsenic, solving the stability and economic problems of arsenic solidification in existing technologies, and realizing the resource utilization of copper slag and the stabilization of arsenic.
Patent Information
- Application Number
- CN202610291196.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-11
- Publication Date
- 2026-05-26
AI Technical Summary
Existing technologies for arsenic fixation suffer from low long-term stability, poor environmental adaptability, and poor economic efficiency. Furthermore, they are difficult to stabilize arsenic and utilize the products for resource recovery. Traditional cement-based solidified bodies are easily damaged, and the arsenic fixation efficiency of new iron-based materials fluctuates significantly with pH, resulting in high costs and making large-scale promotion difficult.
Arsenic-containing substances are added to copper slag along with a sulfuric acid solution with a mass concentration of 10-25%. After stirring evenly, the mixture is cast into a mold. The reaction of Fe2+ and Fe3+ with arsenate ions forms an insoluble compound, which solidifies arsenic in the crystal lattice. The strength is generated by the chemical combination reaction between copper slag and sulfuric acid.
It achieves low-cost arsenic curing, and the material has rapid solidification, good stability and durability, realizes the comprehensive utilization of waste residue, and can effectively reduce the toxic leaching of arsenic.