Patent · US Expired

Process for the heat-treatment of fine-grained material

US4300879A · kind A · utility

6Cited by

2References

8Claims

0Family size

Assignee

Krupp Polysius AG · DE

Inventors

Wolf Goldmann · Beckum, DE
Dieter Michaelsen · Beckum, DE
Dieter Dreyer · Ennigerloh, DE
Dietmar Holsiepe · Ennigerloh, DE
Peter Tiggesbaumker · Oelde, DE
Klaus Bauer · Ulm, DE
Manfred Durr · Bad Sobernheim, DE
Heinz-Georg Mersmann · Beckum, DE

Key dates

Filing date	Nov 2, 1979
Grant date	Nov 17, 1981
Priority date	—
Expiry date	Nov 2, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B7/434
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for the heat-treatment of fine-grained material which is preheated in a cyclone preheater, deacidified by additional fuel in a precalcination zone, and subsequently calcined to completion in a revolving tubular kiln. The gas temperature in the cyclone preheater and the material temperature after passage through the precalcination zone are measured, the difference between these temperatures is determined and, when the temperature difference reaches a maximum or minimum value, regulation of the fuel supply to the precalcination zone is switched to manual operation. In this way, the amount of fuel is rapidly adapted to the particular circumstances prevailing in the event of disturbances.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.