In China, from the Warring States Period to the early years of the Eastern Han Dynasty, the use of iron became widespread and became the most important metal in China. Iron compound ferroferric oxide is magnetite, which is the material of early SiNa.
A brief history of iron
1978, a Shang Dynasty mausoleum was excavated in Liuhe Village, Pinggu County, Beijing, and many bronzes were unearthed. The most striking thing is an ancient iron-edged bronze cymbal, which was identified as meteorite forging. This not only shows that the earliest iron discovered in China also came from meteorites, but also shows that workers in China knew iron more than 3,300 years ago, were familiar with its forging properties, and distinguished the difference between iron and bronze in nature.
Because the source of meteorites is extremely scarce, the iron in meteorites has little effect on production. With the maturity of bronze technology, iron smelting technology has gradually developed.
Refer to the above? Baidu encyclopedia-iron
Refer to the above? Baidu encyclopedia-ironware