US 2015/0225292 A1

Process and device for separating off a volatile component

(22) 02.09.2013

(43) 13.08.2015

(57) A process and device separate off a volatile component from the off-gases in cement clinker production. Raw materials for cement clinker production are passed through a preheater with heat exchange with the off-gases and are then burnt in a rotary kiln. Owing to the heating in the preheater, the volatile component bound in the raw materials is vaporized and separated off. A first raw material stream having a relatively high concentration of the volatile component is applied to a first line of the preheater and a second raw material stream having a lower concentration of the volatile component is applied to the second line. The volatile component is separated off from the first substream of the off-gases. The first raw material stream heated to a temperature of at least 250°C with the first substream of the off-gases in the first line is combined with the second raw material stream.

(71) Scheuch GmbH, Aurolzmünster (AT); W&P Zement GmbH, Klein St. Paul (AT), A TEC Holding GmbH, Krems (AT)

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