Why use chromium ore sand to product magnesia-chrome bricks?
The main raw materials for making magnesia-chrome bricks are sintered magnesia and chromite. The purity of magnesia raw materials should be as high as possible, and the requirements for the chemical composition of chromite are: Cr2O3: 30-45%, CaO: ≤1.0-1.5%.
The main reason why magnesia-chrome bricks use chromium sand as bottom sand is the low refractory performance, thermodynamic properties and chemical stability.
The main component of chromium ore powder/sand is chromium trioxide (Cr2O3), which has a high melting point and sintering temperature, high refractory temperature, and can withstand high temperature environment without performance changes. In addition, it has good thermal conductivity and thermal shock resistance, which can quickly dissipate heat and prevent the material from bursting at high temperature.
These characteristics make chromium ore sand/powder perform well in high temperature environments and are suitable for making refractory materials.
Specifically, the application of chromium ore powder/sand in magnesia-chrome bricks can bring the following advantages: Refractory performance: The high melting point and refractory temperature enable it to remain stable in high temperature environments and is not easy to soften or deform.
Thermodynamic properties: Good thermal conductivity and thermal shock resistance, able to quickly dissipate heat and prevent the material from bursting at high temperatures.
Chemical stability: It exhibits good chemical stability at both room temperature and high temperature, is not easy to react with other chemicals, and is suitable for use in complex industrial environments.
Therefore, chromium ore powder as bottom sand can significantly improve the refractory and thermodynamic properties of magnesia-chrome bricks, extend their service life and improve work efficiency.
