AN OVERVIEW OF TODAY'S SELENIUM AND TELLURIUM MARKETS

摘要

Selenium melts at 217 deg C and boils at approximately 685 deg C. It is insoluble in water but dissolves in concentrated sulphuric acid. With sulphur and tellurium, selenium forms a continuous series of solid solutions and alloys. Selenium also forms a large number of organic compounds. More than 90 percent of primary selenium production results from the procedures the recovery of precious metals contained in anode slimes formed during the electrolytic refining of copper. Selenium is also obtained from electrostatic precipitator dusts collected during the processing of copper zinc and lead ores,and from the sludge which accumulates in related sulphuric acid plants. Production of selenium is almost entirely dependent upon demand for fire refined copper and or the production of copper concentrates from selenium rich resources.