Characteristics of China's Boron Resources

Chinese boron mineral resources have many kinds of associated minerals, rich reserves, ore grade is low, unbalanced distribution of origin and other characteristics.

1. There are many types of boron ore, and there are many symbiotic associated minerals.

There are 8 genetic types in China's boron deposits. The mineral composition of various types of boron ore is quite complex, with many symbiotic and associated minerals.

Metamorphic deposition modeling then boron minerals in addition to the main component of magnesium borate minerals (szaibelyite, boron, magnesium, iron ore, Ashmore then etc.), further comprising a mineral silicate (forsterite, stevensite, gold ) mica, tremolite, titanium, hematite, uraninite and the like; sulfides (pyrrhotite, pyrite, copper ore, etc.) as well as gypsum, anhydrite, sulfates such as apatite Minerals and phosphate minerals.

The salt lake boron mine on the Qinghai-Tibet Plateau is closely symbiotic with dozens of elements such as sodium, lithium , potassium, chlorine and sulfur.

The ore composition of the endogenous skarn boron ore is also complicated, and useful boron minerals such as boron magnesium iron ore and boehmite coexist with a large number of magnetite. Ores often contain elements such as W, Mo, Cu, Pb, Zn, Bi, As, Co, etc. Some of these elements are produced as single minerals, and some are dispersed in other mineral crystal lattices.

The boron-containing mineral of the marine sedimentary boron deposit is manganese borax. There are many gangue minerals, such as iron dolomite, manganese calcite , iron calcite, calcite, quartz , feldspar , black cloud sea, muscovite, apatite, rutile, zircon and clay minerals and metal minerals (pyrite, brass Mine, magnetite, etc.). The manganese borax mineral content is 13.5%.

2, a lot of reserves, but the quality of ore is poor

China's boron ore reserves are not small, but most of the boron ore grades are low. Boron ore with a B ₂ O ₃ content of less than 12% accounts for about 90.74% of the total reserves of boron mines in the country.

China Boron Minerals Index Table

Deposition metamorphism and re-molding boron ore can be divided into three types: boehmite, boron magnesium iron and boehmite-boron magnesium. Their average grade is only 8.27%. In addition to the relatively easy selection of boraxite ore, the other two types of minerals are closely symbiotic with iron minerals, soaking and fine-grained. problem.

The salt lake boron deposits on the Qinghai-Tibet Plateau are divided into solid and liquid deposits. The average content of B ₂ O _{3 in} solid boron ore is only 3.33% (only the average grade of a very small number of boron mines is 20% to 30%, and individual mines can reach 38.7%). (But the total reserves of this rich ore account for only 8.54% of the national total.) The average content of B ₂ O ₃ in liquid boron ore (salt lake brine) is 866.16 mg / L.

The reserves and industrial utilization of the endogenous skarn boron deposit ranks third in the country, and its ore grade is only 6.6%.

The boron-containing minerals of the marine sedimentary boron deposits are manganese borax and rhodochrosite, and the average content of B ₂ O ₃ is 6.7%.

Among the many types of boron mineral resources mentioned above, more than 95% of the raw materials currently processed and utilized are boehmite ore. The amount of this ore only accounts for 6.64% of the total reserves, while the boron-magnesium iron ore accounts for 58.54% of the reserves. Since the processing technology has not yet fully passed, the current industrial utilization is extremely small. The salt lake boron mine, which accounts for 33.13% of the reserves, is distributed in the Qinghai-Tibet Plateau and is currently not fully exploited due to traffic conditions and mining conditions. The total reserves of other types of boron ore only account for 1.69% of the national total.

3. The distribution of production areas is too concentrated

Most of China's boron ore reserves and reserves are concentrated in the four provinces (regions) of Liaoning, Jilin, Qinghai and Tibet. The reserves of boron mines in these four regions account for almost 90% of the national total. The remaining less than 10% of the reserves are scattered in Heilongjiang, Tianjin, Inner Mongolia, Jiangsu, Zhejiang, Hubei, Hunan, Guangxi, Sichuan, Xinjiang and other provinces (districts). Most of China's boron ore reserves and reserves are concentrated in the four provinces (regions) of Liaoning, Jilin, Qinghai and Tibet. The reserves of boron mines in these four regions account for almost 90% of the national total. The remaining less than 10% of the reserves are scattered in Heilongjiang, Tianjin, Inner Mongolia, Jiangsu, Zhejiang, Hubei, Hunan, Guangxi, Sichuan, Xinjiang and other provinces (districts).

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