This paper presents a case history of Capitol Cement's successful use of waste automobile and truck tires as a cement-kiln fuel to supplement the natural gas, coal, and coke traditionally used as fuels in the manufacture of oilfield cements. Other cement-manufacturing plants have been unsuccessful in their attempts to burn tires in oilfield-cement manufacture, producing cement with properties that did not allow the cement to be used in oilfield applications. Tires have been used for many years in the manufacture of construction cement. The following topics are presented in this paper: 1. using microscopy to ensure proper crystal formation, size, and homogeneity 2. using microscopy to ensure a clean burn 3. ensuring that no damage to the environment occurs as a result of tire burning 4. addressing the public relations aspects of burning tires in an urban cement plant 5. managing the logistics of handling the tires and feeding the kiln 6. comparing the performance of tire-burn cement with the performance of conventionally fired cement 7. analyzing the geology of the quarry furnishing the raw materials 8. addressing economic issues This paper also presents photographic and graphic illustrations of key processes.
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