... rock wool, mineral wool is one. To natural rocks and minerals and other raw materials made of fluffy short, thin fibers. ... , machinery, building materials, petroleum, chemical industry. The natural rock, ore and other raw materials, or other pools in the cupola melting ... wool is a natural rock such as basalt, gabbro, dolomite, iron ore, bauxite as raw materials, high temperature melting, fibrosis, made ...