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Extensive development and utilization of geothermal resources started in the early 1970s in China. Great progress has been made both in depth and in breadth since the implementation of the policy of reform and opening-up. At present, in many places exploitation depth is 2,500m and occasionally over 3,500m. Geothermal water with a maximum temperature of […]

The output of clay bricks was 2.423 million tons in China in 1997, that of high-alumina bricks was 1.374 million tons (Table 4.4.4), the total of them was 3.797 million tons. According to a consumption ratio of fireclay to the end product of 1.2, the demand of fireclay was 4.556 million tons, and when 10.078 […]

By the end of 1992, there had been 34 state-owned fireclay mines that were producing and were under construction in the whole country. They are mainly distributed in Shanxi, Hebei, Henan, Shandong, Sichuan and Guangxi. Among them the mining areas with a production capacity of more than 100,000 t/a are as follows: Taihushi at Yangquan […]

Phosphate is an important raw material for industrial chemicals, of which 84 to 90% is used for fertilizer production, 3.3% for additives of fodder, 4% for detergents and the remaining for the chemical industry, light industry and defense industry. The application of phosphate in the industry has a history of more than 100 years. There […]

Phosphate deposits of China are widely distributed in 27 provinces (regions and municipalities), relatively concentrated in Yunnan, Guizhou, Sichuan, Hubei and Hunan provin-ces. The retained phosphate reserves of the 5 provinces total 9.915 billion tons, accounting for 74.40% of the total retained phosphate reserves of China, and rich deposits with P2O5 30% are almost all […]