Resource characteristics: Looking at the types, resource distribution, geological characteristics, and technical and economic conditions of manganese ore in my country, there are the following characteristics:
1. The distribution of ferromanganese resources is uneven. Although there are 21 provinces, municipalities and autonomous regions in China that have found manganese ore, most of them are distributed in the southern region, especially in Guangxi and Hunan provinces and districts, accounting for 56% of the country's manganese ore reserves. The pattern is dominated by Guangxi and Hunan.
2. Most of the deposits are medium and small. Of the 213 manganese deposits in China, only 7 are large and the rest are medium and small deposits. This makes it difficult to make full use of modern industrial technology for mining. Over the years, more than 80% of the output of manganese ore is from local sources Medium and small mines and civilian mines.
3. The quality of ore is poor, and the main manganese ore reserves in China are mainly lean ores. The reserves of manganese-rich ores (manganese oxide ore containing manganese greater than 30% and manganese carbonate ore containing manganese greater than 25%) only account for 6.4%. Industrial processing is still required when used. The reserves of lean manganese ore account for 93.6% of the country's total reserves. Due to the low grade of manganese ore, high impurity content and fine particle size, the technical processing performance is not ideal.
4. The ore material composition is complex high-phosphorus, high-iron manganese ore, and manganese ore containing accompanying (common) co-produced metals and other impurities, accounting for a large proportion of China's manganese ore reserves, such as the Southern Sinian "Xiangtan" manganese ore About 100 million tons of reserves belong to high-phosphorus refractory manganese ore.
5. The ore structure is complex and the grain size is fine. We conducted technological mineralogical studies on some manganese mines in Hunan, Guangxi, Guizhou, Fujian, and Yunnan, the main manganese ore producing areas in China. The results show that the vast majority of manganese deposits are fine-grained or fine-grained. Thereby increasing the difficulty of selection.
6. Most of the deposits are sedimentary or sedimentary metamorphic type, and the mining conditions are complex. Nearly 80% of ferromanganese in China belongs to sedimentary or sedimentary metamorphic type. This type of deposit is widely distributed, and the ore body is in multiple thin layers, gently inclined, and buried deeply. Underground mining is required, and mining technical conditions are poor. The reserves suitable for open-pit mining only account for 6% of the national total reserves.
