| 摘要 |
PURPOSE:To obtain the firebrick wall profile of the whole blast furnace and to stabilize the operation of the blast furnace by embedding a two-point detection type temperature detection sensor which temperature sensing parts at two lengthwise points at a position different from the burying position of a temperature detection sensor, and solving a specific equation by using respective found values. CONSTITUTION:The thickness l of the firebrick wall in a sensor burying direction is found by calculating the corrosion difference between a reference corrosion line and an actual corrosion line on an on-line basis by using a coefficient of temperature correction which relates the corrosion difference to a temperature difference. The heat flow rate between adjacent temperature sensing parts is calculated from temperature measurement results obtained by respective temperature sensing parts to find the heat flow Q in the sensor burying direction of the firebrick wall, thereby determining a correlative expression between the measured value Ts of the outermost surface side temperature sensing part and the heat conductivity lambda of the firebrick wall. The equation is solved by using data on the measured value Ts' of the outermost surface side temperature sensing part which is found by burying the two-point detection type temperature detection sensor at the position different from the temperature detection sensor burying position, the heat flow Q' in the wall thickness direction, and the heat conductivity lambda' of the firebrick wall to calculate the thickness l' of the firebrick wall to the burying position of the two-point temperature detection sensor.
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