High-purity corundum bricks have thermodynamic properties such as excellent corrosion resistance, wear resistance, high-temperature strength, load-softening temperature, and creep. It is widely used as the lining material of industrial furnaces such as residual oil gasifiers, coal gasifiers, carbon black reaction furnaces, pulp waste gasifiers, etc. Rongsheng refractory brick manufacturer is a manufacturer of high-quality high-purity corundum bricks.
In the process of producing high-purity corundum bricks, fused white corundum and tabular corundum are the main raw materials. Its low impurity (such as SiO2) content, high bulk density, and good thermodynamic properties enable corundum bricks to resist thermodynamic, chemical, and structural damage caused by the operation of industrial furnaces such as gasifiers. So which of these two corundum raw materials is suitable for the production of high-purity corundum bricks?
Performance comparison between fused white corundum brick and plate corundum brick
First of all, the production processes of fused white corundum and tabular corundum are different, and the performance is also different, which makes the performance and use of the effect of corundum bricks have certain differences. Tabular alumina has been widely used in the production of high-performance refractory materials, such as sliding nozzles, Al2O3-MgO-C bricks, castables, prefabricated parts, etc. For a long time, high-purity corundum bricks used in non-steel industries, such as industrial furnaces such as gasifiers, are mainly fused white corundum. It is generally believed that fused white corundum has a high volume density, which can increase the density of the product, and has good corrosion resistance, which can improve the overall performance of the product.
Secondly, in terms of bulk density, the bulk density of fused white corundum is slightly lower than that of tabular corundum, and the open porosity is significantly higher, reaching 8.8%. The open porosity of tabular alumina is low, only 2.9%, and there is no obvious open porosity. And most of them are closed pores or intergranular pores, the size is usually less than 10μm, and they are uniformly dispersed inside the particles.
Next, considering the firing shrinkage of tabular alumina bricks, it can be considered that tabular alumina has good thermodynamic activity. It is conducive to firing so that the plate-shaped corundum bricks can be completely sintered at a relatively low temperature, which is beneficial to saving costs.
In addition, tabular alumina improves not only corrosion resistance but also penetration resistance. Plate corundum bricks have low apparent porosity, high bulk density, and good ceramic bonding are the reasons for their good impermeability.
Advantages of corundum bricks using tabular corundum raw materials
Plate-shaped corundum bricks can improve the performance of corundum bricks, especially the comprehensive performance. Summarized as follows:
- Corundum bricks have good sintering activity and can improve density of corundum bricks;
- Corundum bricks containing platy corundum have high bulk density and low apparent porosity;
- Pure corundum bricks have high normal-temperature compressive strength, room-temperature flexural strength, and high-temperature flexural strength;
- Wear resistance of plate corundum bricks;
- Corundum bricks containing platy corundum are better than pure fused white corundum bricks in terms of corrosion resistance and permeability of coal gasification slag and residual oil slag;
- Tabular alumina and fused white corundum can improve the thermal shock stability of corundum bricks;
- The creep resistance of pure plate-shaped corundum bricks and pure fused white corundum bricks is better than that of the two composite aggregates.
Rongsheng high-purity corundum refractory brick manufacturer
Rongsheng high-purity corundum refractory brick manufacturer, the performance of corundum bricks using tabular corundum as aggregate is better than that of corundum bricks using fused white corundum as aggregate. And the most important thing is that the corundum bricks with plate-shaped corundum have better performance in many aspects. Buy high-quality high-purity corundum bricks, and get price information for free, please contact us. According to your specific needs, we will provide you with the most suitable high alumina refractory brick products for your production needs.