0.96 tons of refined zinc. After mineral processing, the raw ore of grade 20 zinc concentrate can produce 0.05-0. 1 ton of metallic zinc. According to the standard conditions of lead and zinc industry issued by the Ministry of Industry and Information Technology, the total recovery rate of electrolytic zinc smelting should reach more than 96%, that is, the corresponding technical level should ensure that 1 metal ton of zinc concentrate can smelt no less than 0.96 ton of refined zinc.