What are the application areas of chromium ore sand?

What are the application areas of chromium ore sand?

Applications of Chromite Sand 

Chromite sand, known for its high-temperature resistance, corrosion resistance, and high hardness, is widely used in the following fields:

1. Metallurgical Industry

• Stainless Steel Production: Chromium is a key component (typically ≥10.5%) that forms a passive oxide layer to prevent rust.

• Special Alloys: Used in nickel-based and cobalt-based superalloys for aircraft engines, gas turbines, etc.

• Ferrochrome Alloys: Produced via electric furnace smelting (high-carbon/low-carbon ferrochrome) to enhance steel hardness and corrosion resistance.

2. Refractory Materials

• Magnesia-Chrome/Chrome-Magnesia Bricks: Used as linings in high-temperature equipment such as steel furnaces (converters, electric arc furnaces), cement rotary kilns, and glass melting furnaces.

• Foundry Sand: Chromite sand is used in precision casting (e.g., aerospace components, automotive engine blocks) due to its high thermal conductivity and heat resistance.

3. Chemical Industry

• Chromium Compounds: Production of sodium dichromate, chromic anhydride, etc., used in electroplating, pigments (e.g., chrome yellow), leather tanning, and catalysts.

• Anti-Corrosion Treatment: Chromates are applied in metal surface treatments (e.g., chrome plating, passivation) to improve corrosion resistance.

4. Other Applications

• Abrasives: High hardness makes it suitable for grinding materials (e.g., sandpaper, polishing powders).

• Pigments: Chromium oxide (Cr₂O₃, chrome green) is used as an inorganic pigment in coatings and ceramic glazes.

• Environmental Protection: Chromite acts as an adsorbent for heavy metal removal in wastewater treatment.

Key Properties & Corresponding Applications

Chromite sand’s versatility makes it a critical material in metallurgy, chemicals, aerospace, and other high-tech industries.