Application of chromium ore powder in the refractory industry
I. Core performance advantages
High refractoriness
The refractoriness of chromium ore powder can reach above 1900℃. The melting point of some natural chromium ores is as high as 2150℃, and the sintering temperature is 1850℃. It can maintain stable performance under extremely high temperatures and is an ideal raw material for high-temperature refractory coatings and products.
Corrosion resistance
It has excellent chemical stability, especially strong resistance to alkaline slag, which can effectively prevent molten metal penetration and chemical erosion.
Mechanical properties
Mohs hardness 5.5-6.5, density 3.0-4.8g/cm³, giving the material high wear resistance and anti-scouring ability, suitable for high-speed metal liquid impact environment.
II. Main application scenarios
Refractory product manufacturing
As aggregate or additive, it is used to produce refractory bricks such as chrome bricks and chrome-magnesia bricks to improve the overall refractory strength and thermal shock resistance of the products.Manufacture of high-temperature furnace lining materials to protect the furnace from molten metal erosion while maintaining volume stability.
Functional coatings and castables
Used in high-temperature refractory coatings, improving the coating’s ablation resistance and spalling resistance, and extending the service life of equipment.
As a key component of refractory castables, it enhances the material’s slag resistance and heat conduction efficiency, and promotes uniform cooling of metal.
Special high-temperature components
Applied in the manufacture of high-temperature furnace tubes, thermocouple protection tubes and other components to meet the durability requirements in extreme environments.
Ⅲ. Process and environmental advantages
Resource utilization
Through clean technologies such as calcium-free roasting, chromium ore powder is efficiently converted to promote the application of the circular economy system in the field of refractory materials.
Replacement of traditional materials
In the casting process, it can replace part of the chilled iron as a chilling material to optimize the cooling effect and reduce costs.
Summary: Chromium ore powder has become a key raw material in the refractory industry due to its high temperature resistance, corrosion resistance and high mechanical strength. It is widely used in the manufacture of high-temperature products, functional coatings and special components, and is in line with the development trend of green production processes.
