Abstract:According to the common technical requirements for dehydration and capacity reduction of arsenic sulfide slag produced by domestic copper pyrogenic smelting enterprises, the arsenic sulfide slag produced by a copper smelter in Shandong province was taken as the research object to transform the arsenic sulfide slag mineralization under high temperature and high pressure. The effects of conversion temperature, conversion time, liquid-solid ratio and stirring speed on the water content, dehydration rate and weight loss rate of the conversion slag were investigated by single factor experiments. The results show that under the conditions of conversion temperature of 200 ℃, holding time of 1.5 hours, liquid-solid ratio of 5 mL/g and stirring speed of 600 r/min, the water content of the conversion slag is less than 10%, the dehydration rate is about 96%, and the weight loss rate is as high as 70%. By changing the mineral structure of the arsenic sulfide slag, the binding ability of arsenic sulfide slag to water is weakened, the purpose of deep dehydration and weight reduction of the arsenic sulfide slag is realized, the cost of solid waste treatment is reduced, and the reduction rate of the arsenic sulfide slag is accelerated.