How is glass made? I heard that sand is used, but what is the concrete principle?
The main raw materials of flat glass are: silica sand (sandstone), sodium carbonate, feldspar, dolomite, limestone and mirabilite.
Ordinary glass plate glass, wire glass and quartz glass (also known as crystal glass) a molding. Wired glass as the quartz glass; only a raw material of sandstone or silica or quartz sand.Tempered glass is made of flat glass as raw material for re processing: the cut of the flat glass into the tempering furnace, heating to about 650 degrees, with cold air quenching, glass forming hardening - tempering. Accomplish!
Technological process:1, raw materials broken: the above raw materials broken into powder;2, weighing: according to the list of ingredients, called a certain amount of powder;3, will be called: the mixed powder mixing, stirring into a batch (colored glass and colorant);4, melting: the mixture into the glass furnace, melting at 1700 degrees into glass;5, forming: the glass liquid into a tin bath (float), pull machine (lattice method), rolling machine (rolling method, adding metal wire is wire glass), forming the flat glass;6, annealing: the molding of glass products into the annealing furnace annealing, balance the stress, to prevent self cracking.
