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US 4,391,671 AGranted
Method of producing lime in a rotary kiln
AssigneePulp and Paper Research Institute of Canada
InventorMahmoud K. Azarniouch
Life of this patent
Estimating the term…
Abstract
Biomass residue is added at the cold end of a rotary calcination kiln to generate heat in situ thereby diminishing substantially the amount of fossil fuel normally fired at the hot end of the kiln.
Claims5
In a method of calcining lime mud or lime stone in a rotating kiln in which the lime mud or lime stone is fed into the cold end of said kiln and is calcined by the heat produced by burning fossil fuel at the hot end of said kiln, the improvement which comprises:
- preparation of biomass residues to produce a biomass residue substantially free from fines and suitable for feeding into said kiln;
- feeding said prepared biomass residues into the cold end of said kiln, along with the material to be calcined;
- combusting said residues in said kiln, generating heat in situ in said kiln, whereby the amount of fossil fuel burned to calcine said material is diminished.
Dependencies are inferred from the claim text.