Compositions: coating or plastic – Coating or plastic compositions – Proteinaceous material containing
Patent
1973-12-10
1976-05-11
Poer, J.
Compositions: coating or plastic
Coating or plastic compositions
Proteinaceous material containing
C04B 744
Patent
active
039559955
ABSTRACT:
A method of heat treating a preheated, pulverous, raw material consisting of or containing lime, such as cement raw meal. By mixing at least part of the preheated raw material intimately with a fuel capable of carrying out at least a partial calcination, a suspension of raw material in a combustible gas is provided. Upon providing a flow of oxygen-containing gas in contacting relation with the suspension of gas/material, at least a partial calcination takes place according to an endothermic process in which calcium carbonate is dissociated into calcium oxide and carbon dioxide. A finishing calcination and/or other heat treatment may follow the calcination process. When the raw material is cement raw meal, the aforesaid finishing heat treatment following the calcination is a sintering by which cement clinker is produced according to an exothermic process. A unique calcination plant is disclosed for at least partially calcining a preheated pulverous, raw material according to the present method wherein by a supply of heat before the material is subjected to a finishing calcination and/or other heat treatment, if any, at least a partial calcination may be performed approximately isothermically and at a relatively low temperature.
REFERENCES:
patent: 2776132 (1957-01-01), Pyzel
patent: 2874950 (1959-02-01), Pyzel
patent: 3013786 (1961-12-01), Pyzel
F. L. Smidth & Co.
Poer J.
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