常压硫化

Abstract:Sulfur slag is a kind of high value-added hazardous waste produced in the process of adding sulfur to remove copper in tin refining. Its main components are tin (60%-70%), copper (15%-25%) and sulfur (10%-15%), which has high economic value. In order to separate tin and copper from sulfur slag efficiently, the sulfur slag was sulfurized under atmospheric sulfuration and vacuum gasification in a high temperature vacuum distillation furnace. The volatile is stannous sulfide, in which the contents of tin and copper are 74.95% and 0.46%, respectively. The residue is cuprous sulfide, in which the contents of tin and copper are 0.26% and 76.41%, respectively. The direct yields of tin and copper are 99.96% and 99.08%, respectively. The separation rate of tin and copper is 99.90%. The atmospheric sulfuration-vacuum gasification method provides a new method for the clean and efficient treatment of tin refining sulfur slag, and provides a new idea for the separation of tin copper alloy.

Key words: atmospheric sulfuration-vacuum gasification; green and efficient; sulfur slag; separation; tin; copper