关键词: 铜矿石, 砷, 生物浸出, 细菌选育

Abstract: The grade of copper ore decreases gradually,and it is difficult to perform flotation.The enrichment of arsenic in copper ore greatly increases the difficulty of processing.The traditional smelting technique will not only affect the quality of copper products,but produce waste gases that cause the environment pollution.Bioleaching technology,with the advantages of low cost,high utilization of resources and environmental protection,has become one of the most important techniques for the treatment of arsenic-bearing copper ore.The present situation of arsenic in copper ore and its influence on the quality of copper products and the output of sulfuric acid products in the process of smelting were introduced.The research status of bioleaching arsenic-bearing copper mines is discussed,including:medium temperature bacteria,high temperature bacteria,the mixture of medium and high temperature bacteria,the addition of catalytic ions or the combination of chemical leaching and other means to improve the copper leaching rate;The breeding method of the leaching bacteria domestication,UV mutagenesis,chemical mutagenesis and genetic engineering are summarized.It is pointed out that the selection of good bacteria with maintaining good leaching efficiency and high tolerance to heavy metal ions in bacteria is the main direction of future research.

Key words: Copper ore, Arsenic, Bioleaching, Bacteria breeding