Energy-efficient cement production using an extremely coarse raw mix – Part 2

A field test has demonstrated that the coarse grinding process can save energy and boost production.

Part 1 of this article [1] examined basic process principles and measuring methods. This second part focuses on the results for the kiln line. An increase in kiln output of up to a maximum of 30 % (from 54 to 70 t/h) was attained. A downward trend was apparent in energy consumption. A reduction in specific energy consumption from 3704 to 3633 kJ/kg clinker was measured, averaged across the entire test period. Even lower energy consumptions were recorded during the test phase of operation at an increased kiln speed, during which a notable stabilisation of kiln operation was also observable. In...

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