Abstract
By the use of a descending probe set on the burden surface and equipped with thermo-couples at a given interval, temperature distribution in vertical and radial direction in a blast furnace can be measured as it goes down with burden material.
To estimate the location of the probe in the furnace, an experiment was carried out by a small-sized cylindrical model, and it was found that the middle point of the probe descended in accordance with a stream line of the burden material at the same radial. From this result, a method was presented to estimate the location of the probe in the furnace.
The isotherms were obtained by analyzing the temperature distributions measured at Kakogawa No. 1 blast furnace. The 1200°C isotherm was in a good agreement with the outer profile of melting zone observed after the dissection of the furnace. At Kobe No. 2 blast furnace, the change of isotherms was investigated with the change of coke rate and 1200°C isotherm in the peripheral part was kept at a constant level by the burden distribution control to maintain the stable operation.
