Abstract:This paper introduces the efficient leaching of copper, zinc and cadmium in white dust and the effective enrichment of arsenic, antimony, biscuit and lead in the leaching residue by using the waste solution of chlorine salt from a factory as leaching agent and "two-stage counter-current pressurized cyclic leaching" method. The results show that when the liquid-solid ratio of reaction is controlled at L∶S=6∶1, the reaction time is 4h, the reaction temperature is 80℃, the reaction pressure is 0.9MPa, the leaching solution pH is 1.0 ~ 2.0, the average leaching rates of copper, zinc and cadmium are 98.00%, 97.13% and 92.48% respectively, the copper content of the secondary leaching washing residue is less than 1.0%, the arsenic content of the secondary leaching washing residue is 8.61%, antimony content is 4.63%, bismuth content is 16.82%.