Apparatus and method for the heat treatment of fine-grained mate

Heating – Tumbler-type rotary - drum furnace

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432106, 432 14, F27B 702

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active

048612650

ABSTRACT:
The invention relates to apparatus and to a method for the heat treatment of fine-grained material using a multi-stage cyclone preheater and a combustion chamber supplied with tertiary air from the cooler, in which the branched part of the tertiary air pipe extends upwards and the material discharged from the second-lowest stage of the cyclone preheater is introduced into one branch pipe at a point which lies lower than the point at which this branch pipe is connected to the combustion chamber. In this way good dispersal of the material which is delivered pneumatically to the combusion chamber and excellent combustion conditions are achieved at the same time as a considerable reduction in the overall height of the entire cyclone preheater.

REFERENCES:
patent: 3881862 (1975-05-01), Nishida et al.
patent: 4392822 (1983-07-01), Brachthauser
patent: 4514170 (1985-04-01), Kupper
patent: 4747879 (1988-05-01), Wolter et al.

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