| A silver-containing high-sulfur copper ore contains 0.76% copper, 24.35% sulfur and 34.92 g/t of silver. There are many valuable minerals and their properties are complicated. The combined process of sulfur preferential flotation of copper and activated sulfur suppression process was adopted for testing. The enrichment of silver in copper concentrates was improved by using lime as the inhibitor of iron sulfide minerals and butyl xanthate + ester-105 as the combined collector of copper sulfide minerals. Under the optimized conditions, the obtained copper concentrate contained 21.60% copper and 602.84 g/t of silver, and their recovery rate were 89.30% and 54.39% for copper and silver, respectively. However, the sulfur concentrate contained 45.60% sulfur and 21.55 g/t of silver, and their recovery rates were 89.79% and 29.59% for sulfur and silver, respectively. The comprehensive recovery of copper, sulfur and silver in the ore was realized by using the proposed process. |
