The invention discloses a method for recycling
sphalerite from separated
tailings of lead-
sulfur bulk concentrate. The method for recycling the
sphalerite from the separated
tailings of the lead-
sulfur bulk concentrate comprises the steps that firstly, water is added to the separated
tailings of the lead-
sulfur bulk concentrate, and the
mass percent concentration of a pulp is adjusted to be 25%-32%; secondly, an appropriate amount of
lime is added so that the pH value of the pulp can be adjusted, and
pyrite is inhibited at the same time; thirdly,
copper sulfate is added as an activating agent to activate the
sphalerite; and finally, a collecting agent,
aniline, and a
foaming agent are added for flotation of the sphalerite, the flotation procedure comprises one-time rough flotation, two-time
scavenging and three-time concentration (after the concentrate obtained through rough flotation is ground to the extent that the ores reaching the grain level of >-0.043 mm account for 90%, concentration is conducted ), and effective concentration of the sphalerite is achieved. According to the sphalerite obtained through the method, the
zinc grade is higher than 40%, and the
recovery rate of
zinc is higher than 80%. By the adoption of the method for recycling the sphalerite from the separated tailings of the lead-sulfur bulk concentrate, the
zinc lost in the lead-sulfur separated tailings, namely sulfur products, can be well recycled, the comprehensive
recovery rate of zinc is improved, and the
economic benefits of a concentrating
plant are increased.