METHOD FOR PREVENTING WORN-OUT OF BRICK IN BLAST FURNACE

PROBLEM TO BE SOLVED: To provide a method for preventing the worn-out of brick in a blast furnace with which the worn-out of the side wall brick at a furnace bottom by beforehand grasping the state of starting the wearing of the side wall brick at the furnace bottom. SOLUTION: At least two sets of thermometers T0, T1are embedded at different positions in the thickness direction of the furnace bottom brick 12 in the blast furnace 10, and a percolating heat quantity Q of the furnace bottom brick 12 is obtained from the measured values of the thermometers T0, T1and the percolating heat quantity Q is controlled in a prescribed range. Further, at least two sets of the thermometers T0, T1are embedded at different positions in the thickness direction of the furnace bottom brick 12 in the blast furnace 10, and a temperature gradient ΔT from the temperature difference between the measured values of the thermometers T0, T1, is obtained and this temperature gradient ΔT is controlled in a prescribed range. COPYRIGHT: (C)2006,JPO&NCIPI