The thermal conductivity of clay refractory bricks for coke oven is relatively weak, and its thermal conductivity is usually lower than that of silicon bricks. The following is specific information about the thermal conductivity of clay refractory bricks for coke ovens:

I. Characteristics of thermal conductivity

(1) Thermal conductivity range

The thermal conductivity of clay refractory brick is generally around 0.25-0.65 W/(m k), and the specific value depends on the density and porosity of the brick.

The thermal conductivity of light clay thermal insulation brick is lower, usually between 0.23 and 0.65 W/(m k), which is suitable for parts with high thermal insulation requirements.

(2) Compared with silicon brick

The thermal conductivity of silicon brick is obviously better than that of clay brick, and its thermal conductivity is usually 1.8-2.9 W/(m k). In contrast, the thermal conductivity of clay brick is about 15%-20% of that of silicon brick.

(3) Factors affecting thermal conductivity

Porosity: The higher the porosity of clay brick, the lower the thermal conductivity. Lightweight clay thermal insulation brick with high porosity has better thermal insulation performance.

Density: The density of clay brick is generally 1.8-2.2 g/cm, and the lower the density, the smaller the thermal conductivity.

Temperature effect: the thermal conductivity of clay brick increases with the increase of temperature, but it is still lower than that of silicon brick at high temperature.

II. Application scenarios

Because of its relatively weak thermal conductivity, clay refractory bricks are mainly used in secondary parts of coke ovens, such as:

Regenerator sealing wall, partition wall and checker brick: These parts have low requirements for thermal conductivity, but they need good thermal shock resistance and thermal insulation.

Small flue lining brick: used for heat insulation and corrosion resistance.

Furnace door lining brick and riser lining brick: these parts have frequent temperature changes and need good thermal shock resistance.

III. Summary

The thermal conductivity of clay refractory bricks for coke oven is relatively weak, and the thermal conductivity is about 0.25-0.65 W/(m k), which is suitable for secondary parts with high thermal insulation requirements. Its low thermal conductivity helps to reduce heat loss, and at the same time, it shows good thermal shock resistance in parts with frequent temperature changes.