In 1997, the output of crude ores was 5.976 million tons and that of processed ores 3.694 million tons, among which 91,000 tons were produced by key enterprises, amounting to 2.46% of the total output; 1.126 million tons by local enterprises and 2.448 million tons by township collective-owned and self-employed enterprises. On the whole, the output of manganese ores has increased year by year in China. In the 1990s the annual output varied very slightly between 3.5 million and 4.5 million tons and the production of township collective-owned and self-employed enterprises occupied 65% of the total output of manganese ores.
With the development of iron and steel production and the growing demand of other industrial sectors for manganese ore, the domestic Mn ores cannot meet the domestic demand and import has become necessary. In recent years, the proportion of imported ores has been amplified gradually. In 1993 the domestic consumption of Mn ores was 4.431 million tons (including the ores used for the export of Mn-series products, hereinafter), among which 3.866 million tons (excluding 5,000 tons of exported ores) were produced in China, amounting to 87.1% of the consumption. The imported rich ores were 570,000 tons, amounting to 12.9% of the consumption. In 1996, the domestic consumption of Mn ores was 5.998 million tons, among which there were 4.417 million tons of domestic ores (excluding 4,000 tons of exported ores), amounting to 73.6% of the consumption, decreased by 13.5 percent points compared with 1993. The imported rich ores were 1.585 million tons, accounting for 26.4% of the consumption, an increase of 13.5 percent points from 1993. Although the import (268,000 tons) was decreased in 1997, its proportion in the consumption, being 26.28%, changed very slightlychina impact crusher:http://www.crusher-machine.com/2.html