报废银钨触头回收银和钨的工艺研究

Recycling Process of Silver and Tungsten from Waste Ag-W Alloy Contact

摘要:

银钨合金触点是重要的电接触材料，报废银钨触点中银钨的分离和资源化问题引起了越来越多的重视。以报废银钨触头为原料，提出了“一次分银-焙烧-二次分银”的回收工艺，考察了银钨分离的工艺条件，通过实践验证了其可靠性，银、钨的回收率达到99%以上。回收得到的银和钨可分别深加工成粒度为0.3~0.6 μm的超细银粉和纯净的WO3产品。

Abstract:

Ag-W alloy contact is one kind of important electrical contact materials, and the separation and recycling of sliver and tungsten from waste Ag-W alloy contact has attracted more and more attention for the resource value and secondary pollution during the recycling process. A novel process about the separation and recycling of sliver and tungsten from waste Ag-W alloy contact has been proposed, which includes 4 steps of first leaching silver, roasting, secondary leaching silver and ammonia leaching. The result shows that the recovery rate of Ag and W is higher than 99%, and 0.3-0.6 μm superfine silver powders and pure WO3 powders can be obtained during the recycling process.