Patent ID: 8454715

Claim:
A device for carrying out chemical or physical reactions between a solid material and a gas, in particular for the preheating, cooling or calcining of fine-grain materials, having at least one helical or spiral conduit ( 1 ), in which a gas-solid material suspension is separated by centrifugal forces into a solid material flow ( 4 ) and a gas flow ( 5 ) and, connected to the end of the helical or spiral conduit ( 1 ), at least one separation region ( 2 a ), to which a solid material conduit ( 3 ) for discharging the solid material flow ( 4 ) and a gas conduit ( 2 ) for discharging the gas flow ( 5 ) are connected, characterised in that the separation region is formed by a lower part of the gas conduit ( 2 ), the separation region ( 2 a ) in a region of a junction of the helical or spiral conduit ( 1 ) and the part of the gas conduit ( 2 ) above and adjoining it have the same diameter and, to form a swirling flow, the helical or spiral conduit ( 1 ) opens out tangentially and at an angle (α) to horizontal of at least 30° into the separation region ( 2 a ).