Modern Mining ›› 2024, Vol. 40 ›› Issue (02): 170-172.
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The copper minerals in a low-copper and high-sulfur copper ore of Inner Mongolia are
mainly chalcopyrite，other metal minerals are mainly pyrrhotite and pyrite，and gangue minerals are mainly
quartz，mica，chlorite and so on. The chalcopyrite in the ore is closely related to the dissemination of pyrite
and pyrrhotite. The high alkalinity copper-sulfur flotation separation process with lime as inhibitor used in
the field has the problems of serious scaling of pulp tank and pipeline，affecting the stability of industrial
production，and huge environmental protection pressure. In order to solve these problems in production，a
new type of pyrite inhibitor YA was used as the core agent to carry out the test of sulfur inhibition and copper
flotation. The results show that under the condition of grinding fineness of -0.074 mm 65%，the closed-cir⁃
cuit test is carried out by using the process of one roughing，two scavenging and three cleaning，middle ore
returning in sequence. The copper concentrate with Cu grade of 19.53% and Cu recovery of 90.43% is ob⁃
tained. The grade of Cu in tailings is as low as 0.038%，and the ideal low alkalinity copper-sulfur separation
effect is obtained，which can be used as the basis for on-site optimization and transformation.
