Abstract: In order to accurately evaluate the acid production potential of chats in Ganzhou,the net acid production test,the maximum net acid production potential test and the leaching test were carried out.The research results showed that about half of chats samples had acidification potentials,but the net acid production was less,the maximum production of H2SO4 was only 10 kg/t.The chats in Ganzhou with low content of sulphur were not completely acidated in the short term,but the heavy metal elements in the chats could be all dissolved out,in which the dissolving-out quantity of Cd、Pb、Zn、Hg and other heavy metal elements were exceeding and would polluted surroundings.

Key words: Waste ores, Acid production potential, Net acid production, Net acid production potential