New Copper-lead Separation Method New Pyrrhotite depressant system Clay dispersant Depressant system for treatment of clay containing sulphide ores New Arsenical gold-Pyrite separation system New oxide Zinc collector New oxide Copper Collector New marcasite depressant system Method for chromium removal from ilmenite concentrate New oxide Lead-Zinc reagent scheme New carbonaceous gaugue depressor Several Au/Ni/PGM reagent schemes New Cu/Ni separation method New PGM collector and reagent scheme