L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Lafarge

Sociedade Portuguesa Do Ar Liquido "arliquido", Lda

Carlo Renna

Remi Tsiava

Xavier Paubel

Michel Gimenez

Morten Drivsholm

Henrik Wassard

Colin Paxton

Faustine Panier

Bernard Labegorre

Sergio Fernandes

Rémi Tsiava

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

Oxy-calcination process

Method of operating a long direct-fired inclined counterflow rotary kiln for the thermal treatment of material and counterflow rotary kiln adapted for same, whereby material to be treated is introduced into the kiln at the inlet end and treated material is evacuated from the kiln at the outlet end, whereby a main combustion zone extends inside the kiln over a distance of &#xbc; to &#x2153; of the internal length Lof the kiln, whereby a supplementary combustion zone in which supplementary combustion takes place with an oxygen-rich oxidant extends inside the kiln over a distance from the inlet end of at most &#xbc; of the internal length L, and whereby no combustion takes place in a heat exchange zone located between the main combustion zone and the supplementary combustion zone.

Direct-fired inclined counterflow rotary kilns and use thereof

Growing community of inventors

Maule, France

Carlo Renna