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Refractory bricks used in masonry coke ovens need to have a load softening temperature that is higher than the highest temperature of the components used; within the temperature range of the components used, it has the ability to withstand sharp changes in temperature; it can resist all possible encounters on the site of use Corrosion of various media; carbonization chamber-a combustion chamber wall has good thermal conductivity, and lattice refractory bricks have good heat storage performance.

Due to the long service life of the coke oven and the extremely complex refractory brick type, the technical requirements are higher in the masonry process. The refractory bricks should be evenly laid, the gray joints should be sufficient, and the verticality and level should meet the requirements. To ensure quality, pre-laying is required. The masonry temperature should be higher than 5°C, and the building should be protected from rain and cold. In addition, the number of refractory bricks used for masonry is usually thousands of tons, so Anrui refractory materials recommend that customers accurately select the refractory materials used in coke ovens.

The clay brick content is 33%~48%, and the rest is mainly SiO2 and a small amount of impurities. Clay bricks are made by crushing and burning unburnt and charred (clinker) clay. Clay bricks have good resistance to quenching and rapid heating, and are usually used for bricklaying where the temperature changes dramatically. Clinker clay bricks are used as lamp refractory bricks, riser lined refractory bricks, etc. The thermal conductivity and mechanical strength of clay bricks are inferior to those of silica refractory bricks. Modern coke ovens are only used for low temperature and variable temperature components.

The total expansion of clay bricks heated to 1100°C is small and uniform, but heating to 1200°C will cause the residue to shrink. This is due to the continuous recrystallization of minerals in the refractory bricks and the gradual melting of low-melting compounds at high temperatures. The solid particles are close to each other. The shrinkage size is related to the composition of the ingredients and the firing temperature.

Silicone refractory brick contains more than 293% of SiO and is made by burning high silicon powder. For binding, 2 to 3% lime is mixed into the mud. Silica refractory bricks have good thermal properties, and due to their high SiO2 content, they have high resistance to water and ash erosion. The refractoriness of silicon refractory brick can reach 1700~1750℃, and the load softening point can reach above 1520℃.

Silica refractory bricks are resistant to rapid cooling and rapid heating, and severe temperature fluctuations can damage the silica refractory bricks. This is because the density of SiO2 also changes with temperature, causing rapid expansion and contraction.

 SiO2 can exist in three crystal forms. Each type has several homomorphic crystals. Each identical crystal has a different lattice and density, and has a certain temperature range stability. Above this temperature range, crystal transformation occurs. The density of scaly quartz is very small, so the required density of coke oven silica refractory bricks is as small as possible, containing a large amount of scaly quartz.

Increase the thermal conductivity of silica refractory bricks, increase the density of silicon refractory bricks, and increase the thermal conductivity. Depending on the amount of SiO2 used, the price of refractory bricks is also different from the price of SiO2. The expansion of several types of refractory bricks is completely different. Clay bricks (below 1300°C) and silicon carbide refractory bricks swell less. The linear expansion of silica refractory bricks changes with temperature. The expansion rate of magnesia brick is nearly linear. Growing relationships. Both quartz and cristobalite have sudden temperatures.