DEVELOPMENT OF TECHNOLOGY FOR HIGH-ACCURACY TEMPERATURE MEASUREMENT OF CLINKER IN KILNS：PART1 ─ THEORY OF THE DUST-CANCELING METHOD AND APPLICATION TO AN EXISTING KILN

抄録

Precise temperature control during clinker burning is important for reducing energy consumption during cement production. Although radiation thermometers are conventionally used for measuring the clinker burning temperature, they suffer from the problem of poor measurement accuracy due to dust in the kiln. We therefore devised a method called the dust-canceling （DC） method for clinker temperature measurement that can eliminate the influence of dust in the kiln hood by using a radiation thermometer for measuring dust temperature in addition to the usual radiation thermometer for measuring clinker temperature. In this study, the validity of the DC method was confirmed with an experimental apparatus and applied to an existing production kiln. As a result, it was possible to obtain measured values closer to the theoretical clinker burning temperature compared with the conventional measurement method.