Metal silicon "(also known as industrial silicon in China) is a commodity name that emerged in the mid-1960s. Its emergence is related to the rise of the semiconductor industry. The international practice is to divide commodity silicon into metallic silicon and semiconductor silicon. Metallic silicon is a product produced by smelting quartz and coke in an electric furnace, with a main component of silicon element content of about 98% (99.99% Si content is also included in metallic silicon), and other impurities such as iron, aluminum, calcium, etc.