As the raw materials for the preparation of mold slag, there are: natural minerals, industrial wastes and industrial products. The raw materials that have been used as basic slag materials include: cement, cement clinker, wollastonite, feldspar, quartz, power plant flue ash, blast furnace slag, electric furnace white slag, etc. The auxiliary materials for the flux include: caustic soda, fluorite, barite, cryolite, borax, lithium carbonate, etc. Melting rate regulators include natural graphite, carbon black, lamp black, etc.