12-25-2017, 03:28 AM
Not accidental clay brick is what? 1 Clay brick refers to the clay content of Al2O3 content of 30% ~ 40% aluminum silicate material. Clay brick is 50% soft clay and 50% hard clay clinker, according to the wpc manufacturers in europe requirements of a certain particle size ingredients, after molding, drying. The clay mineral composition is mainly kaolinite and 6% to 7% of impurities (potassium, sodium, calcium, titanium, iron oxide). Clay brick firing process, mainly kaolinite dehydration decomposition of mullite crystallization process.
SiO2 and Al2O3 in clay brick form eutectic low melting point silicate with impurities during sintering, and surround the mullite crystal. Clay bricks are weak acid refractory products, can resist the erosion of acid slag and acid gases, slightly less resistance to alkaline substances. Clay brick thermal performance, heat-resistant emergency. Clay brick refractory and silica brick comparable, up to 1690 ~ 1730 ��, but the load wooden parquet suppliers in mauritius softening temperature is lower than the silicon brick 200 �� above. Because the clay brick contains in addition to the high refractory mullite crystals, but also contains nearly half of the low melting point amorphous glass phase.
In the temperature range of 0 ~ 1000 ��, the volume of clay brick expands with the increase of temperature. The linear expansion curve approximates a straight line, with the linear expansion rate of 0.6% ~ 0.7%, only about half of the silica bricks. When the temperature reaches 1200 �� and then continue to heat up, the volume will begin to shrink from the best composite decking manufacturer the maximum expansion. Residual shrinkage of clay bricks leads to cracks in the mortar joints, which is a major disadvantage of clay bricks.
When the temperature exceeds 1200 ��, the low-melting point in the clay brick gradually melts, because the particles are closely pressed to each other by the surface tension, resulting in volume shrinkage. Due to the low load softening temperature of clay bricks, shrinkage occurs at high temperature, the thermal conductivity is 15% ~ 20% less than that of silica bricks, and the mechanical strength is also worse than that of silica bricks. Therefore, clay bricks can only be used in secondary parts of coke ovens, Such as regenerator wall, small flue lining brick and regenerator lattice brick, door lining cover up ugly concrete patio uk brick, roof and rising pipe lining brick.
SiO2 and Al2O3 in clay brick form eutectic low melting point silicate with impurities during sintering, and surround the mullite crystal. Clay bricks are weak acid refractory products, can resist the erosion of acid slag and acid gases, slightly less resistance to alkaline substances. Clay brick thermal performance, heat-resistant emergency. Clay brick refractory and silica brick comparable, up to 1690 ~ 1730 ��, but the load wooden parquet suppliers in mauritius softening temperature is lower than the silicon brick 200 �� above. Because the clay brick contains in addition to the high refractory mullite crystals, but also contains nearly half of the low melting point amorphous glass phase.
In the temperature range of 0 ~ 1000 ��, the volume of clay brick expands with the increase of temperature. The linear expansion curve approximates a straight line, with the linear expansion rate of 0.6% ~ 0.7%, only about half of the silica bricks. When the temperature reaches 1200 �� and then continue to heat up, the volume will begin to shrink from the best composite decking manufacturer the maximum expansion. Residual shrinkage of clay bricks leads to cracks in the mortar joints, which is a major disadvantage of clay bricks.
When the temperature exceeds 1200 ��, the low-melting point in the clay brick gradually melts, because the particles are closely pressed to each other by the surface tension, resulting in volume shrinkage. Due to the low load softening temperature of clay bricks, shrinkage occurs at high temperature, the thermal conductivity is 15% ~ 20% less than that of silica bricks, and the mechanical strength is also worse than that of silica bricks. Therefore, clay bricks can only be used in secondary parts of coke ovens, Such as regenerator wall, small flue lining brick and regenerator lattice brick, door lining cover up ugly concrete patio uk brick, roof and rising pipe lining brick.