Silicon is extensively used for smelting into ferrosilicon alloys as an alloying element in the steel industry, and as a reducing agent in many metal smelting processes. Silicon is also a good component in aluminum alloys, and the vast majority of cast aluminum alloys contain silicon. Silicon is the raw material of ultrapure silicon in the electronic industry. Electronic devices made of ultrapure semiconductor monocrystalline silicon have advantages such as small volume, light weight, good reliability, and long lifespan.