As the main refractory of coke oven, silica brick plays a vital role in the heat utilization rate of coke oven. Through the addition of additives, the internal structure of silica brick is optimized and the thermal conductivity is improved. The thermal conductivity of the made high thermal conductivity silica brick is increased by about 15% compared with that of ordinary silica brick at 1100 ℃. It is measured and calculated that when the high thermal conductivity silica brick is used in the furnace wall of carbonization chamber, the flame temperature in the combustion chamber can be reduced by about 40 ℃. Therefore, High thermal conductivity silicon brick can completely achieve the purpose of energy saving and low carbon.
Through experimental comparison, the thermal conductivity value of high thermal conductivity silica brick at 1100 ℃ is 1.7-2.1w/m.k, and the average value is 1.9w/m.k. it is obvious that the high thermal conductivity silica brick has high thermal conductivity and realizes the effect of energy saving. The microstructure is denser than that of ordinary silica brick, and the porosity is low, which effectively improves the thermal conductivity.
