High Aluminum Poly Light Insulation Brick

High Aluminum Poly Light Insulation Brick Feature

1.Insulation and heat insulation: Because the aerated concrete is in the process of production, the internal pores are formed. These pores constitute an air layer in the material guessing, which greatly improves the thermal insulation effect, so that the thermal conductivity of the aerated concrete is 0.11. -0.16W/MK. The insulation effect is 5 times that of clay fire bricks and 10 times that of general concrete.

2.Light weight fire brick: Lightweight brick has a dry capacity of only 500-700Kg/m*3, which is 1/4 of general concrete, 1/3 of clay, and 1/2 of hollow block, because its bulk density is smaller than water. Commonly known as aerated concrete floating on the water, the use of this refractory product in the construction can reduce the weight of the building and greatly reduce the inductive cost of the building.

3.Earthquake resistance: The same building structure uses high alumina poly light refractory bricks to improve the seismic rating of clay fire bricks.

4. Environmental protection: production, transportation, and application process without pollution, maintenance of plowing, energy saving, which is a green refractory material.

High Alumina Poly Light Firebrick Production Process and Material Introduction

Grade III alumina clinker, Al2O3 powder and soft clay. The R2O content in the tertiary alumina is 0.5% to 2%, and the sintering temperature is between 1100 and 1400 ℃. According to the experiment, R2O in the gentleman can promote the decomposition of mullite crystal phase. 1% R2O can constitute 10% glass phase and corundum. When the R2O content is close to 2%, the mullite crystal phase tends to disappear. The formation of more corundum and glass phase is due to the decomposition effect of R2O on mullite, which leads to the collapse of the network structure in which the mullite needle like crystals cross each other in the bauxite. The mullite refractory brick is present in the glass phase in the form of an island, which causes the load softening temperature to decrease and the thermal stability to deteriorate. Therefore, the R2O content in the quality guess is particularly constrained, and the grouting process using sodium rosin as a foaming agent is particularly strict.

TiO2 is also one of the higher impurities in bauxite. In the third grade bauxite, TiO2 enters the glass phase more, lowering the viscosity of the liquid phase, which is beneficial to sintering, but is not conducive to the high temperature function of the lightweight high alumina brick.

R2O has a large solid melting degree in the main crystal phase mullite and corundum of bauxite clinker. Fe2O3 is solid-melted to mullite at 1200 °C and solidified by 10% to 12% at 1300 °C. In corundum brick 1200 ° C is about 12% solidified, and at 1400 ° C is about 18% solid solution. In a restorative atmosphere, the solid solubility decreases and it is easy to melt off into the glass phase. When lightweight alumina bricks are used in a rejuvenating atmosphere, the Fe2O3 is also strictly restrained.