Gasification, coal rotary kiln

KILnGAS A coal gasification process, conducted in a rotary kiln. Developed by Allis-Chalmers Coal Gas Corporation in 1971 and piloted on a large scale at the Wood River power station, IL, since 1980. 

This coal gasification reaction attains appreciable rate for sustaining the reduction reaction only at about 1000 °C for most of the reactive chars (devolatilised coal). Those who have access to very highly reactive coals (coals which give on devolatilisation very highly reactive chars), operate their rotary kilns below 1000 C. 

The use of AF in cemenf rofary kilns is widespread either in Europe or United States with increased usage in other parts of the word such as South-East Asia, Japan, or Australia. The cement rotary kiln can be fired on conventional fuels such as pulverized fossil coal, HFO or natural gas and in combination with AF in co-firing mode. The gasification of the solid waste fuels has been infroduced only at a limited number of cement plants. The individual cement rotary kiln characteristics should always be considered when the utilization of AF is foreseen. There is always an impact on kiln production and emissions as well as on the ring and builds up formation, fhen on fhe kiln running factor. 

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