초록 ▼

A method is taught for separately preheating cullet and batch, material use in glass making. This method uses a two stage process for preheating batch in a way that allows water vapor to escape to the atmosphere before the main preheating stage. It supplements current preheating methods of the art o

A method is taught for separately preheating cullet and batch, material use in glass making. This method uses a two stage process for preheating batch in a way that allows water vapor to escape to the atmosphere before the main preheating stage. It supplements current preheating methods of the art of glass making. Apparatuses to carry out this method are also taught.

대표청구항 ▼

[ I claim:] [1.] A method for pre-heating glass manufacturing raw materials entering a glass melting furnace with hot exhaust gases from said furnace which comprises the following sequential steps:a) separating different glass manufacturing raw materials by size and other physical characteristics in

[ I claim:] [1.] A method for pre-heating glass manufacturing raw materials entering a glass melting furnace with hot exhaust gases from said furnace which comprises the following sequential steps:a) separating different glass manufacturing raw materials by size and other physical characteristics into a first stream material comprising larger sized particles having one set of physical characteristics and a second stream material comprising smaller sized particles having another set of physical characteristics including moisture content,b) introducing said first stream material to the top of a first moving bed,c) passing hot exhaust gases from said glass melting furnace through said first moving bed so that heat is transferred directly from said gases to said first stream material,d) removing first stream material from the top of a first moving bed,e) transferring heat from said first stream material previously heated by furnace exhaust gases to the second stream material to remove moisture from said second stream material,f) introducing said first stream material to the top of a second moving bed after it has transferred heat to the second stream material,g) providing one or more heat transferring conduits which are immersed in, but pass through, said second moving bed with no openings in the conduits at any point the conduits are in contact with the second moving bed,h) causing the dried second stream material to flow through the inside of said heat transferring conduits passing through said second moving bed,i) gassing hot glass making furnace exhaust gases through second moving bed so that heat is transferred from the gases to said first stream material and through said conduits from the gases to said second stream material and from first stream material to second stream material, andj) feeding the heated first stream material and heated second stream material to said glass making furnace.