METHOD OF PROCESSING PYRITE-CONTAINING POLYMETALLIC RAW MATERIAL

摘要

The method provides for the heating of the processed raw material without access of air at a temperature of 700 to 800 C during one to two hours with subsequent breaking down into products by means of magnetic separation. It is advisable to heat the walls enclosing the processed raw material up to a temperature which is by 100 to 200 C higher than the boiling temperature of the volative components of the raw material. After the heat treatment, the processed raw material is cooled at a rate of 2 to 4 degrees per minute, then ferrous sulphides are extracted by means of magnetic separation at a magnetic field intensity of 1000 to 2000 oersteds and after that copper sulphides are extracted at a magnetic field intensity of 4500 to 6000 oersteds.