Heating – Tumbler-type rotary - drum furnace – Having combustion products generated in or fed to drum
Patent
1989-01-03
1990-07-17
Yuen, Henry C.
Heating
Tumbler-type rotary - drum furnace
Having combustion products generated in or fed to drum
432 14, 432 58, F27B 1500, F27B 702
Patent
active
049418211
ABSTRACT:
The invention relates to a method and to apparatus for the heat treatment of fine-grained material using a calcination zone which is arranged between a preheating zone and a final combustion zone, and after passing through the calcination zone a proportion of the material is introduced into exhaust air from the cooling zone and delivered therewith back to the calcination zone for the purpose of recirculation. In this way a good burn-out of the fuel used in the calcination zone and a high degree of deacidification of the material are achieved.
REFERENCES:
patent: 4381916 (1983-05-01), Warshawsky
patent: 4470849 (1984-09-01), Abelitis et al.
Driemeier Gunter
Durr Manfred
Rother Wolfgang
Schmits Heinz-Herbert
Unland Georg
Krupp Polysius AG
Yuen Henry C.
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