Distribution Of Bismuth Powder In The World

wallpapers Robot Tech 2021-01-15
Bismuth is a silver-white to pink metal, brittle and easily crushed, and its chemical properties are relatively stable. Bismuth exists in the form of free metals and minerals in nature. In the past, bismuth was considered to be the most stable element with the largest relative atomic mass, but in 2003, it was discovered that bismuth has extremely weak radioactivity.
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Bismuth exists in the form of free metals and minerals in nature. The minerals include bismuthite, bismuth and so on. Metal bismuth is obtained by calcining minerals into bismuth trioxide, and then co-thermally reduced with carbon. It can be refined by fire method and electrolytic refining to obtain high-purity bismuth.

The content of bismuth in the crust is not large, 2×10%. In nature, bismuth exists in two states: elemental and compound. The main minerals are bismuthite (Bi2S3), bismuthite (Bi2O3), and bismuthite (nBi2O3· mCO2·H2O), copper bismuth ore (3Cu2S·4Bi2S3), galena (2PbS·Bi2S).
The world's major bismuth producing countries are China, Mexico, Peru, Japan, Australia, Kazakhstan, Canada, and Bolivia. The global annual production of bismuth is expected to be about 15,000 tons, of which China's output exceeds 10,000 tons, accounting for more than 70%, Mexico is about 8%, and Belgium is about 5%.
Due to the influence of resources and environmental factors, the production of bismuth has been declining. Countries such as Japan and the United States have also reduced the production of bismuth year by year due to cost and environmental requirements. In 2010, global metal bismuth production is expected to be close to 16,000 tons, of which China's output exceeds 12,000 tons, Mexico is about 1,200 tons, Belgium is 800 tons, Peru is 650 tons, and Japan is 400 tons.

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