Method for manufacturing alkali chromates from chromium ore
AssigneeBayer Aktiengesellschaft
InventorsRainer Bellinghausen, Heinrich Helker, Paul Strehlow, Hans-Heinrich Moretto, Bernhard Spreckelmeyer, Norbert Lonhoff, Michael Batz, Rainer Weber, Hans Rinkes, Hans-Dieter Block, Uwe Arndt
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Abstract
A method for the decomposition of chromium ore in a directly heated revolving tube is described, in which oxygen-containing gases are introduced into the revolving tube by means of below-bed nozzles.
Claims1
A method for manufacturing alkali chromates by the oxidative roasting of a mixture of chromium ore with alkali compounds, optionally in the presence of leaning materials, in a directly heated revolving tube at temperatures of 850.degree. to 1,150.degree. C., wherein oxygen-containing gases are injected through the wall of the revolving tube and into said mixture.
Dependencies are inferred from the claim text.