Optimum technological conditions of serpentine leaching in sulfuric acid

The leaching process of serpentine in sulfuric acid is one of the key factors in the comprehensive utilization of serpentine. In this paper, based on the previous results of separate factor conditional experiments, the optimum technological conditions during the leaching process of serpentine in sulfuric acid are studied by using orthogonal L 16(4 4)experiments. The results indicate that,when the particle size is less than 75 μm,the stirring rate more than 200 r/min and the amount of activating reagent 1.5% and these factors are taken as invariable factors, the optimum technological conditions are as follows:the leaching temperature 100 ℃,the leaching time 3 h, the concentration of sulfuric acid 45%,and the proportion of liquid to solid 4.0∶1.