The aim of the research was to study the corrosion process taking place in the refractory material of the burner of a clinker kiln and to identify the causes of the process. Samples taken from the burner's refractory material and raw meals were used in the study. Based on the test results three different types of corrosion processes were identified: a.) Corrosion resulting from the transformation of the Al_2O_3 (corundum) content of the refractory material; b.) Corrosion caused by the clinker dust stuck to the refractory material surface; c.) Corrosion of refractory fibres located between the burner's internal metal tube and its refractory material; These processes are not connected but they run parallel. We have found that the main cause of all these corrosion processes is the large quantity of alkali in the system.
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