一种采用碳酸钙和碳源从硫化砷渣中回收金属砷的方法
By adding calcium carbonate and a carbon source to arsenic sulfide slag and reacting in a high-temperature zone, metallic arsenic is generated and separated to a low-temperature zone. This solves the problems of low arsenic recovery rate and environmental pollution in pyrometallurgical processes, and achieves efficient and low-cost resource utilization. The generated metallic arsenic can be used in optoelectronic materials, alloys, semiconductors and other fields, while the roasted slag can be used as a hair removal agent and to make luminescent paint.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CENT SOUTH UNIV
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing pyrometallurgical technologies suffer from low arsenic recovery rates, low product purity, and environmental pollution when processing arsenic sulfide slag. Furthermore, traditional hydrometallurgical processes are complex and costly, making it difficult to achieve efficient resource utilization.
Calcium carbonate and a carbon source are reacted with arsenic sulfide slag in a high-temperature zone to generate metallic arsenic, which is then transferred to a low-temperature zone. Sulfur is fixed by calcium carbonate, thus separating metallic arsenic from calcium sulfide. A multi-temperature zone tubular furnace is used for temperature control to generate and collect metallic arsenic.
This method enables the one-step recovery of high-purity metallic arsenic from arsenic sulfide slag, while simultaneously fixing sulfur, thus avoiding sulfur dioxide pollution. The process is short, low-cost, and has a high resource utilization rate. The generated calcium sulfide can be used in pesticides and luminescent paints.
Smart Images
Figure CN122105127B_ABST