C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
49/14, 261/2
C04B 20/06 (2006.01) C03B 19/10 (2006.01)
Patent
CA 1244484
INVENTOR: HANS BEAT FEHLMANN INVENTION: PROCESS AND APPARATUS FOR PRODUCING AN EXPANDED MINERAL MATERIAL ABSTRACT OF THE DISCLOSURE An expanded mineral material suitable for use as a filler, e.g. instead of or in addition to sand or gravel in concrete mixes, is produced by dropping a stream of solid pellets in- to a rising stream of heated gas contained in a substanti- ally vertical reactor space; the pellets consist essentially of a fusible mineral composition and a latent blowing agent; while falling in counter-current to the gas stream the pel- lets are heated progressively and expand at least to the point where they are capable to float in the gas stream and are carried in concurrent motion with the gas stream out of the reactor space. This reversal of motion of the expanding particles provides for a substantially self-regulating resid- ence period of the particles in the expansion zone resulting in substantially improved process control and economy. An apparatus for carrying out this process is disclosed. - 1 -
462676
Construction Research & Technology Gmbh
Ridout & Maybee Llp
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