常 common sense

Discover a small history

18th century BC have been found in Hungary small block of antimony. 1556 Agricola (G.Agricola) proposes a method of producing ores solvent out of antimony sulfide, antimony sulfide, but erroneously believed to be metallic antimony. In 1604, the German B.Valentine described the extraction method of strontium and barium sulfide. In the 18th century, the smelting reduction method was used to smelt and produce electrolytic ruthenium. Since 1930, blast furnace smelting methods have been widely used, as well as various volatile smelting and volatile roasting methods. In the Ming Dynasty, the antimony mine of the tin mine was discovered in China, but it was mistaken for the tin mine. It was only in the late Qing Dynasty that it was known to be a sputum. In 1908, the volatile roasting method was introduced from France and the refining was started. China's alfalfa production has a large proportion in the world. In 1942, Wang Pangyou and American Hodson jointly obtained the patent for floating smelting-hydrogen reduction smelting.

Awkward nature

It is a silvery white brittle metal and resistant to acid at room temperature. Ordinary metal bismuth is also ash, and below the 90 °C is the allotrope jaundice. The sudden cooling of the vapor of the metal crucible solidifies into an amorphous black crucible. Black cockroaches are chemically active, sometimes natural, and fade to ash at temperatures above 90 °C. In addition, electrolysis with antimony trichloride gives a black hydrazine containing a small amount of antimony trichloride. This type of cockroach will explode when it is rubbed or impacted, which is called blasting. Therefore, attention should be paid when electrolyzing. The crucible does not interact with air at normal temperature, and Sb2O3, Sb2O4 or Sb2O5 can be formed in the air at high temperature, and can also react with water to form Sb2O3 and hydrogen.