Tires As Fuel in the Kiln

Tires have occasionally been used to supplement the primary precalciner fuel (usually coal), with mixed results. 

Florida Crushed Stone in Brookville, Florida, was feeding TDF into the preheater, but had to discontinue use because of plugging of the preheater (most likely due to oil condensate from the incomplete combustion of the tire chips). The company is in the process of installing a whole tire feeder with weight-belt, computer, variable rate belt, and triple gate chute to feed tires into the kiln.10 

Southwestern Portland Cement in Victorville, California, not only adds TDF successfully to the preheater, but concurrently supplements the primary kiln fuel by mixing 

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