“The essence of the air pollution problem in Beijing-Tianjin-Hebei is environmental overload. In Hebei, the crude steel production capacity is about 280 million tons. At present, the actual steel production is about 180 million tons, and there are more than 90 million tons of cement p.......

Cyanide gold extraction is one of the main methods for extracting gold from gold ore. The explanation of the mechanism of cyanide on the dissolution of gold is still inconsistent. Most people think that gold can form a gold complex and dissolve in the presen.......

I. Overview Zhaoyuan City, east gold ore processing plant was built in the spring of 1978, July 1980 and beginning of production, built at the beginning scale of 150t / d. In 1990, the concentrato.......

Iron ore resources in China, though rich, but 95% of the iron ore beneficiation and processing needs, and magnetite accounted for only about 30%, the rest is weakly magnetic iron ore and