Apparatus for the mutli-step calcination of cement-clinker
AssigneeKlockner-Humboldt-Deutz Aktiengesellschaft
InventorHerbert Deussner
Life of this patent
Estimating the term…
Abstract
Apparatus for the production of cement from raw material to the clinker stage is disclosed. The raw material is first heated in a heat exchanger with the heat energy being supplied by the waste heat from subsequent stages of this process. The heated raw material is then passed into a heat exchanger to be partially calcined. Calcination is completed in another heat exchanger, with the waste heat used in the final calcination being supplemented with combustion of a fuel. The calcined material is then passed to a kiln for conversion to clinker, from which the material is then cooled, the warmed cooling air to be used partially for combustion in the kiln and partially during calcination.
Claims8
An apparatus for the production of cement from raw material to the clinker stage which comprises:
- a preheat heat exchanger means having means for receiving and heating raw material;
- calcination heat exchanger means which comprise:
- a precalcination stage means connected to receive material from said preheat heat exchanger, and
- an after-calcination stage means with means for receiving material from said precalcination stage;
- a gas inlet means for each of said calcination stages providing heated air therefor;
- a fuel supply, burner, and air supply for supporting combustion of the burner for said after-calcination stage means of the calcination heat exchanger means;
- and
- a fuel fired sintering kiln means connected to receive material from said after-calcination stage.
Dependencies are inferred from the claim text.