... coal, anthracite, weak conherent charcoal as fuel, air and steam as vaporization medicinalpreparation to produce gas as heat source ... glass melting gas furnace, ceramic gas furnace, smoke exausting refractory kiln and tunnel kiln, as well as the renovation of furnaces ... such as metallurgy, chemical industry, allumim, fire-resistant materials, glass products and existing kiln,with very good effect.ect.