Development of Two-Color Thermometer Using a Color CCD Camera and Measurement Technology of Tuyere and Raceway of Blast Furnace

The temperature of the tuyere and the raceway shows the state of the combustion of the pulverized coal and the state of circling of the coke and the dropping state of the un-reduction ore. Thus, it is a key factor for the estimate of the state or stability of under cohesive zone and raceway structure. Therefore, to measure the state of the temperature of the raceway quantitatively, two color thermometer using color CCD camera was developed. This thermometer can be measured a long term and continuously without being able to measure two dimensional and disturbing the measurement because it is noncontact. Moreover, the influences of optical attenuation such as dust and dirty window compared with the radiation thermometer are not received easily. In addition, we found the possibility that a structural change in the raceway was able to be detected by making the temperature of a measurement point all images a histogram and evaluating the average, standard variation, skewness, and kurtosis.