Oxy-calcination process

摘要

Method and installation for calcining cement raw meal in a calciner (10) whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner (10) so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level (L13) and the lowermost oxidant inlet level (L16) of the calciner (10), between 50% and 100% by weight of the raw meal (14, 15) being supplied to the calciner (10) upstream of and/or within the oxidant-lean, respectively the fuel-lean zone.