From the perspective of development and utilization, China's rare earth metal resources have the following characteristics:
1) The distribution of reserves is highly concentrated (mainly light rare earth). Although China's rare earth minerals are distributed in six regions including North China, Northeast China, East China, Central South, Southwest China and Northwest China, they are mainly concentrated in the Inner Mongolia Baiyun Obo iron-stron and rare earth mining areas in North China. Their rare earth reserves account for the total reserves of rare earths in China. 95% is the main production base of light rare earths in China.
2) The light and heavy rare earth reserves show the characteristics of “north light and heavy south†in geographical distribution, that is, light rare earth is mainly distributed in the northern region, and heavy rare earth is mainly distributed in the southern region, especially in the Nanling area. The adsorption type medium rare earth and heavy rare earth ore are easy to extract and easy to extract, and have become an important medium and heavy rare earth production base in China. In addition, there are weathering crust and coastal sedimentary sand deposits in the south, some are rich in xenotime (heavy rare earth mineral raw materials); some of the tungsten deposits in southern Anhui (such as Xihuashan, Dangping, etc.) associated with xenotime Heavy rare earth minerals such as silicon germanium ore, strontium fluorite, fluorocarbon calcium strontium ore, brown strontium ore, etc., can be comprehensively recovered and comprehensively utilized in the process of tungsten ore smelting.
3) There are many rare earth deposits associated with them, and the comprehensive utilization value is large. Among the hundreds of mineral deposits that have been discovered, more than two-thirds are co-associated minerals, which have comprehensive utilization value. However, most mineral deposits are complex in composition, and the size of the ore is fine. Most of them are difficult to ore. For example, there are more than 70 kinds of minerals in the Bayan Obo deposit, and more than 170 kinds of minerals. Among them, the rare earth and thorium reserves are huge, which is rare rare earth and rare in the world. Metal deposits. Rare earth minerals such as monazite, bastnasite, bastnasite ore, and yellow river ore, which are symbiotic in iron ore, although the structure of the ore is complex and the size of the inlay is fine. However, after continuous testing and research, the concentrate grade and smelting extraction and recovery rate have been greatly improved, and it has become the main raw material base for light rare earths in China.
4) China's rare earth mineral resources have many reserves and varieties, which provide superior resource conditions for the development of rare earth metal industry. The proven reserves of rare earths are more than 100 million tons, and there is still a large potential for resources. All kinds of rare earth elements, 17 kinds of rare earth elements, have not found natural minerals, and the remaining 16 kinds of rare earth elements have been found minerals and ores. In the mineral deposits surveyed and developed, 16 kinds of rare earth metals have been extracted from ore minerals through the metallurgical process. Hundreds of varieties and thousands of rare earth products have been produced, which not only meet domestic demand, but also have a large number of Exports have become one of the main mineral products and processed products for China's export earnings.
A notable feature of the scarce metal resources is that the distributed provinces and some of the deposits that are deposited are more concentrated, and are said to be “not sparseâ€. More than 80% of the reserves are distributed in Guangdong, Yunnan, Jilin, Sichuan, Shanxi and other five provinces, mainly in lead-zinc mines, copper mines and coal mines. The 82% of gallium reserves are concentrated in Shanxi, Henan, Guangxi, and Guizhou, and are mainly associated with bauxite deposits. Indium is concentrated in lead-zinc deposits and copper polymetallic deposits in four provinces including Yunnan, Guangxi, Inner Mongolia and Qinghai, accounting for 87% of the total indium reserves in China. Almost all of them are associated with molybdenum deposits, which are concentrated in the deposits of the Jinduicheng molybdenum deposit in Shaanxi, the Luanchuan molybdenum deposit in Henan, the Daheishan molybdenum deposit in Jilin, and the Duobaoshan copper (molybdenum) deposit in Heilongjiang. Nearly 90%. The distribution of strontium is concentrated, and more than 90% of the reserves are concentrated in the Jinping lead-zinc deposit in Lanping, Yunnan. It is mainly associated with the Dabaoshan polymetallic sulphide deposit in Guangdong, the Chengmenshan copper deposit in Jiangxi and the Jinchuan copper-nickel deposit in Gansu, accounting for 94% of the total strontium reserves in the country, but recently found an independent in Dashuigou, Shimian County, Sichuan Province. Tantalum deposit. Only cadmium and selenium are scattered, cadmium is distributed in 24 provinces, and selenium is distributed in 18 provinces. Many deposits are associated with cadmium and selenium.
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Label: Rare Earth Metal
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