China Nonferrous Metallurgy

The copper anode mud smelting slag was an important rhodium resource. The rhodium in copper anode mud smelting slag was recovered by fire enrichment and wet extraction. The effects of various factors on the enrichment were investigated.Under the conditions of the addition of PbO 1.1 times wt. of smelting slag，the addition of B₂O₃1.1 times，the addition of Na₂CO₃ 0.9 times，1200℃ and 2h melting time, the Rh content of lead alloy was 7536.4g/t，and the enrichment times was 6.2；under the conditions that addition of silver was 1 time wt. of lead alloy, the ash blowing temperature was 1300℃, and the ash blowing time was 2.5h, the Rh content of silver alloy was 42208.1g/t , and the enrichment times was 35.7；under the conditions of leaching temperature 60℃, leaching time 1.5h and leaching liquid-solid ratio of 10∶1, the purity of rhodium powder was 91.2%, and comprehensive recovery of rhodium secondary resources was realized.