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

Sociedade Portuguesa Do Ar Líquido

Sociedade Portuguesa Do Ar Liquido "arliquido", Lda

Sergio Fernandes

Remi Tsiava

Bernard Labegorre

Carlo Renna

Rémi Tsiava

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.

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Alges, Portugal

Sergio Fernandes