Abstract
It is possible to fire dinas coke of all types with both simple and intricate shapes, weighing up to 10kg, in tunnel-type kilns. The firing of heavyweight and extra-intricately-shaped parts in these kilns leads to a very high yield of spoilage through cracking. In order to reduce spoilage we must select a manufacturing process for the green dinas which will suit the conditions of high-speed firing in a tunnel-type kiln, and at the same time we must develop a more favorable temperature regime in the pre-heating and firing zones. When firing dinas coke in tunnel-type kilns it is essential to avoid the use of dark brown quartzites containing more than 0.5% Fe2O3; and we should use a fine-grain mixture which considerably facilitates the degeneration of the quartz into a type of low bulk density silica. It would be useful to carry out firing tests with the dinas coke made by the new technological system, passing the cars through every three and a half hours.
Published Version
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