Method for heat treating cement clinker raw materials

Details Method for heat treating cement clinker raw materials Method for heat treating cement clinker raw materials

1982-09-16

1983-11-22

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

432 13, C04B 744

Patent

active

044166966

ABSTRACT:
A method is disclosed for heat treating raw material components of a cement clinker prior to admitting the components to a reactor for sintering the components to form the clinker. A calcareous component of the raw material is preheated with a hot gas flow and admitted to a furnace in a calcioning stage. Fuel combusted in the furnace heats the calcareous component to a calcination reaction temperature and calcines the component. The calcined component is transferred to a furnace in a superheating stage where a fuel is combusted to further heat the component beyond a sintering temperature at which a calcined component and an argillaceous component sinter to form cement clinker. The superheated calcareous component is transferred to a sintering reactor. Hot gas from the furnace in the sintering stage is flowed to a second heat exchanger to preheat and dehydrate an argillaceous component of the raw material. The dehydrated argillaceous component is transferred to the sintering reactor and sintered with the superheated calcareous component with the sensible heat of the calcareous component supplementing the heat needed to maintain sintering and the reactor providing only the heat as needed to augment the heat of the calcareous component.

REFERENCES:
patent: 3139463 (1964-06-01), Wohrer
patent: 3203681 (1965-08-01), Rosa et al.
patent: 3914098 (1975-10-01), Kano et al.
patent: 3973980 (1976-08-01), Rohrbach et al.
patent: 4213791 (1980-07-01), Wilson
patent: 4256502 (1981-03-01), Lovichi et al.

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