Patent · US Expired

Method and apparatus for the heat treatment of fine-grained material

US4941821A · kind A · utility

1Cited by

2References

9Claims

0Family size

Assignee

Krupp Polysius AG · DE

Inventors

Manfred Durr · Bad Sobernheim, DE
Georg Unland · Ennigerloh, DE
Wolfgang Rother
Gunter Driemeier · Lienen, DE
Heinz-Herbert Schmits · Rheda-Wiedenbrück, DE

Key dates

Filing date	Jan 3, 1989
Grant date	Jul 17, 1990
Priority date	—
Expiry date	Jan 3, 2009

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF27B7/2033
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

The invention relates to a method and to apparatus for the heat treatment of fine-grained material using a calcination zone which is arranged between a preheating zone and a final combustion zone, and after passing through the calcination zone a proportion of the material is introduced into exhaust air from the cooling zone and delivered therewith back to the calcination zone for the purpose of recirculation. In this way a good burn-out of the fuel used in the calcination zone and a high degree of deacidification of the material are achieved.

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