Earthworms are widely distributed trace elements in nature. Strontium fifth period of the second group is located in the periodic table, is one of alkaline earth metal elements. To date, about 46 species of antimony minerals have been discovered in the world. The output of strontium minerals are reached as much as nine kinds, respectively: celestite, strontianite, strontium-rich aragonite, sulfur, phosphorus, aluminum, arsenic, strontium aluminum stone, strontium, potassium alum, alum, calcium, strontium phosphate, calcium Carbonium ore and strontium carbonate. First, geographical distribution China has identified 13 antimony deposits in six provinces. Among them, Qinghai Province has the largest reserves of 15.911 million tons, accounting for 48.4% of the country's total reserves. This was followed by Shaanxi Province, which was 5.0417 million tons, accounting for 15.3% of the country's total reserves. The third place is Hubei Province, with 4,743,300 tons, accounting for 14.4% of the country's total reserves. There are also Yunnan, Sichuan and Jiangsu provinces. Second, the characteristics of resources Among the reserves of antimony ore in China, the proportion of associated ore is not small. According to statistics, in 1996, the associated mineral reserves totaled 13.2234 million tons, accounting for 40.2% of the country's total reserves. Main associated strontium deposits in Hubei Huangshi City Lions Tateyama, lead zinc Pineapple Hill strontium ore; Yunnan Jinding Jinding lead and zinc ore block Jiayashan and mining segment Paoma, Luonan County Huanglongpu molybdenum mine. China's single antimony ore grade is less than 60%, with less ore. The medium and low grade ore constitutes the main body of the antimony ore. Associated strontium ore lower grade ore, lead-zinc mine in Yunnan Jinding SrSO 4 containing an average of only about 8% lower Huanglongpu Luonan County molybdenum content of SrSO 4, only about 4%. China's antimony ore has been proved to be large and medium-sized deposits. According to the classification of deposit size formulated by the National Mineral Reserves Committee, the reserves of large-scale antimony ore SrSO 4 are more than 200,000 tons, the reserves of medium-sized antimony ore SrSO 4 are 50,000-200,000 tons, and the reserves of small antimony ore SrSO 4 are less than 50,000 tons, except Yunnan Lan The Xihe Mine in Pinghe and the Dafengshan Mine in Qinghai Huatugou Town are all medium-sized antimony deposits, and the rest are large. The Dafengshan antimony deposit in Huatugou Town of Qinghai is a rare and very large antimony ore in the world. China's antimony ore geological exploration is low, and the proven antimony ore reserves account for only 6.9% of the exploration level, while the detailed inventory is 72.2%, and the census reserves account for 20.9%. Third, use 锶 It is widely used in various fields such as electronics, chemical, metallurgy, military, light industry, medicine and optics due to its strong absorption of X-ray radiation and unique physical and chemical properties. With the continuous development of the world's industry, the field of use of cockroaches has gradually expanded and changed. From the end of the 19th century to the beginning of this century, people used cesium hydroxide in the sugar industry to purify beet syrup; during the two world wars, bismuth compounds were widely used in the production of pyrotechnics and signal bombs; in the 1920s and 1930s, strontium carbonate was used for refining. steel desulfurizing agent to remove sulfur, phosphorus and other harmful impurities; 50 years, in the production of electrolytic zinc, strontium carbonate with zinc purification, purity of up to 99.99%; late 1960s, strontium carbonate is widely used as a magnetic material; titanate锶Used in electronic computer memory, cesium chloride is used as rocket fuel; in 1968, it was found that cesium carbonate shielded X-ray function and applied to color TV screen glass, the demand is increasing rapidly; 其他 in other fields It is also constantly expanding its range of applications. Since then, bismuth carbonates and other bismuth compounds (barium salts) have received widespread attention and attention as important inorganic salt materials. According to the steady growth of the world's demand for antimony and China's rich antimony resources and good prospecting prospects for antimony ore, in addition to meeting the needs of China's national economic development, antimony resources can also develop antimony resources and various products. An export-oriented mining economy that participates in international competition. 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