Method and apparatus for calcining fine-grained material and for

Details Method and apparatus for calcining fine-grained material and for Method and apparatus for calcining fine-grained material and for

1981-02-27

1982-05-11

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

432 13, 432 16, 432106, C04B 702

Patent

active

043291805

ABSTRACT:
Method and apparatus for calcining fine-grained material such as in the manufacture of cement in which the raw material is subjected to the sequential steps of pre-heating, calcining and sintering. At least one of the stages is fueled by coal dust which has been ground and dried with a drying exhaust gas derived from one of the stages. In accordance with the invention, an exhaust gas fraction is withdrawn from one of the stages, and has a relatively high concentration of injurious substances such as alkalis and sulfur. This withdrawn exhaust gas fraction is then cooled by one of a variety of methods, and then treated for the removal of the injurious substances. Finally, the cooled gas fraction is used to dry the coal dust fuel by conserving energy which would otherwise be lost in the process.

REFERENCES:
patent: 2600515 (1952-06-01), Mooser
patent: 4260370 (1981-04-01), Goldmann et al.

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