Process of producing cement and plant for carrying out the proce

Details Process of producing cement and plant for carrying out the proce Process of producing cement and plant for carrying out the proce

1982-03-26

1983-09-20

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

432 14, 432 58, 432106, C04B 744

Patent

active

044053746

ABSTRACT:
In a process of producing cement, a powdered mixture of raw materials is de-acidified in a calcinator and subsequently burned in a kiln. Before de-acidification, the mixture is preheated in a plurality of heat exchange stages by the exhaust gases from the kiln and from the calcinator, which are passed through respective parallel series of the heat exchange stages, the powdered mixture being passed from heat exchange units of each series to associated heat exchange units of the other series. The heat efficiency of this process is improved by combining the exhaust gas streams from the kiln and from the calcinator coming from the parallel series of heat exchange stages, and then feeding the combined stream of exhaust gases to another heat exchange stage, which is the last stage in the flow path of the exhaust gases and to which the cold powdered mixture of raw materials is fed.

REFERENCES:
patent: 4276020 (1981-06-01), Shibuya et al.

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