Back to results
US 5,353,997 AGranted
Process for crushing raw lignite
AssigneeLoesche GmbH
InventorsKlaus Kasseck, Werner Karpus, Gerhard Salewski
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for crushing raw lignite. The raw lignite is dried with an exit temperature after drying of approximately 70.degree. to 85.degree. C. The dried raw lignite is then crushed. This crushing of the dried raw lignite is performed in an air-swept roller mill, in which the crushing and cooling of the lignite particles is brought about by the inflowing cold and/or ambient air to a temperature range of below 60.degree. C.
Claims11
Process for crushing raw lignite to fine coal in an air-swept roller mill, comprising:
- supplying previously dried raw lignite to an air-swept roller mill having a temperature of approximately 70.degree. to 85.degree. C.;
- blowing cold air and/or air at ambient temperature through the air-swept roller mill;
- crushing the dried raw lignite to form lignite particles at the same time as cooling the particles with the cold air and/or ambient air to a temperature below 60.degree. C., and
- controlling the cooling of the lignite particles by controlling inflow speed and/or temperature of the cold air and/or ambient air.
1 more element
Dependencies are inferred from the claim text.