Gold Jewelry is polished to bring out the brilliance and luster of Gold. Many types of polishing and buffing media are used . The polishing dust generated by the process is collected for the recovery of precious metals. If this polishing dust is subjected to leaching for the gold recovery, the gold recovery is very low. However, if it is roasted prior to leaching (dissolution), the gold recovery dramatically changes. This paper examines the oxidation kinetics of waste polishing dust during roasting, and reasons for high gold recovery.

Authors: Dr. Ramana G. Reddy, Dr. Rajesh K. Mishra