Pyrite Activation in the Lead-Zinc Tailings Recovery
Most non-ferrous metals are metal sulfides ores, such as lead-zinc ore , copper sulfide, which often coexist with a large number of pyrites. Pyrite is the main raw material for industrial sulfuric acid, but China is a leading manufacturer and consumer of sulfuric acid, so the comprehensive utilization of pyrite plays an important role in lead-zinc tailings recovery. At the same time, improving the recovery of pyrite in non-ferrous metal sulfide ore has the good influence on the whole national economy and mining enterprises. According to the conventional flotation practice, pyrite is a kind of sulphide with good floatability, which is easily inhibited by lime, sodium hydroxide and sodium cyanide in alkaline environment. Therefore, people often add sufficient lime to the grinder, then preferentially separate lead, zinc, copper and other metals. According to the inhibiting principle of pyrite, iron pyrite can generate a strong hydrophilic thin film with hydroxyl i...