Loading patent…
AssigneeMetallgesellschaft Aktiengesellschaft
InventorsHans Beisswenger, Jochim Eschenburg, Johannes Loffler
Estimating the term…
A process for producing cement, including preheating a mixture of ground raw materials (raw meal) in a preheating cyclone to form a preheated raw meal, calcining the preheated raw meal in a calciner to form a calcined raw meal, burning the calcined raw meal in a rotary kiln with the aid of a high-grade fuel to form a cement clinker, cooling the cement clinker in a rotary kiln and grinding the cooled cement clinker. The process is characterized by replacing 50 to 70% of the high-grade fuel with a low-grade fuel, gasifying the low-grade fuel in a fluidized bed to form a resulting fuel gas, supplying a first portion of the resulting fuel gas to a main burner of the rotary kiln, a second portion of the resulting fuel gas to the exhaust gas stream from the rotary kiln and a third portion of the resulting fuel gas to the calciner.
In a process for producing cement, said process comprising the steps of preheating a mixture of ground raw materials in a preheating cyclone to form a preheated raw meal, calcining the preheated raw meal in a calciner to form a calcined raw meal, burning the calcined raw meal in a rotary kiln having a main burner with the aid of a high-grade fuel to form a cement clinker and an exhaust gas stream, cooling the cement clinker and grinding the cooled cement clinker, the improvement comprising replacing 50 to 70% of said high-grade fuel with a low-grade fuel, gasifying said low-grade fuel in a fluidized bend to form a resulting fuel gas, supplying a first portion of the resulting fuel gas to the main burner of the rotary kiln, a second portion of the resulting fuel gas to the exhaust gas stream from the rotary kiln and a third portion of the resulting fuel gas to the calciner.
Process for producing cement, comprising the steps of:
Dependencies are inferred from the claim text.