Process for producing cement clinker
AssigneePortlandzementwerk Dotternhausen Rudolf Rohbach Kommanditgesellschaft
InventorsHelmuth Rechmeier, Gerhard Rohrbach
Life of this patent
Estimating the term…
Abstract
To produce cement clinker, particulate material such as limestone, clay, iron oxide and sand is fed to a heat exchanger in which it is heated by heat supplied from a furnace. The heated material is conveyed to the furnace and sintered therein to form the cement clinker. Fuel formed from organic waste, for example motor vehicle tires, is used as the fuel.
Claims18
In a process for producing cement clinker wherein raw meal is fed to a heat exchanger, heat is supplied to the heat exchanger from a downstream kiln, the raw meal is heated in the heat exchanger and the heated raw meal is conveyed to the kiln and sintered therein by use of a fuel to form the cement clinker, the improvement which comprises using high grade waste fuel formed from organic waste in the form of motor vehicle tires, rubber scrap, or plastics scrap and wherein the waste fuel is processed before combustion by pyrolysis to form pyrolysis gases and a pyrolyzed residue and said pyrolyzed residue is comminuted or gasified.
Dependencies are inferred from the claim text.