... thin fibers. 70 years of the 20th century is widely used in metallurgy, machinery, building materials, petroleum, chemical industry. ... is a natural rock such as basalt, gabbro, dolomite, iron ore, bauxite as raw materials, high temperature melting, fibrosis, ... , ribbons, paper and a variety of products, should be used for construction and industrial equipment, pipes, furnace insulation, fireproofing ...