Process for the melting of silicate raw materials, in...

Details Process for the melting of silicate raw materials, in... Process for the melting of silicate raw materials, in...

C - Chemistry, Metallurgy

03

B

C03B 3/02 (2006.01) C03B 5/237 (2006.01)

Patent

CA 2077169

1 Gr?nzweig + Hartmann AG 6700 Ludwigshafen, DE Abstract 1. A process for the melting of silicate raw materials, in particular for the production of mineral wool, and an apparatus for the preheating of the raw material mixture. 2.1. In the case of the prior processes and apparatus for the melting of silicate raw materials, the requisite outlay for effectively reducing the emission values in respect of dust, fluorides and chlorides in the tank exhaust gases, and for recycling the additives back to the molten bath, are relatively high. 2.2. According to the invention, provision is made for the preheating of the raw material mixture, the cleaning of the tank exhaust gases and the recycling of the impurities back into the molten bath to be performed simultaneously as an integrated process step and by the same apparatus, namely the raw material preheater (9). For this purpose, arranged above the preheater (9) is a storage silo (27) for sorption means, and also a metering device (28) for the proportional discharge of the sorption means into a receiving container (12) of the preheater (9). Alternatively, a liquid container (29) can be provided, as can an atomising element (31) for the proportional spraying of liquid from the liquid container (29) into the receiving container (12). 2.3. Production of rock wool from basalt. 3. Fig. 1.

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