AN IMPROVED PROCESS FOR SULPHATION ROASTING OF COPPER SULPHIDE CONCENTRATES TO RECOVER COPPER VALUES IN SOLUBLE FORM

摘要

An improved process for sulphation roasting of copper sulphide concentrates to recover copper value in soluble form comprising blending the finely ground copper sulphide concentrates with inorganic metal salt additives as herein described calcining the blended mixture and aqueous leaching of the calcine, characterised in that the copper sulphide concentrates is ground to a particle size upto minus 74 microns, further blended with oxide, chloride and/or nitrate ions as herein described as additive, subjecting the blended mixture to sulphation roasting at a temperature range of 360 Degree Celsius to 500 Degree Celsius for period of 90-120 minutes, coding the calcinated mass obtained, pulverizing and aqueous leaching the same at a temperature range of 60 Degree to 75 Degree Celsius to obtain copper values in water soluble form.