Chromium Oxide Green (Cr₂O₃) serves as a flux, deoxidizer, and alloy additive in metal smelting, improving smelting processes and product quality.

1. Applications in Smelting

1.1 As Flux

Chromium oxide green can lower slag melting point and improve fluidity:

• Steel smelting: Adjust slag composition, promote desulfurization and dephosphorization
• Non-ferrous metals: Slagging agent in copper, lead, zinc smelting
• Ferroalloys: Chromium iron, silicon-chromium alloy production

1.2 As Deoxidizer

Chromium oxide green can participate in deoxidation reactions under specific conditions:

• Used with strong deoxidizers like aluminum, silicon
• Forms stable complex oxide inclusions
• Improves steel melt purity

1.3 As Alloy Additive

Adds chromium elements to steel melt:

• Produce stainless steel: Add chromium to 12-25%
• Produce tool steel: Improve hardness and wear resistance
• Produce heat-resistant steel: Improve high-temperature performance

2. Technical Requirements

2.1 Chemical Composition

• Cr₂O₃≥98% (standard grade)
• Cr₂O₃≥99% (high-end grade)
• SiO₂<0.5%
• Fe₂O₃<0.5%
• S, P<0.03% (to avoid harmful elements in steel)

2.2 Physical Properties

• Particle size: 0.1-1mm (suitable for addition)
• Bulk density: 1.5-2.0 g/cm³
• Moisture: <0.5% (to avoid steel melt gas absorption)

3. Application Process

3.1 Electric Arc Furnace Steelmaking

Add chromium oxide green as chromium source to electric furnace:

1. Add part of chromium oxide green during charging stage
2. Add carbon powder for reduction during melting period
3. Adjust composition during oxidation period
4. Refine during reduction period, ensure chromium recovery

3.2 Ladle Refining

Add chromium oxide green in ladle to fine-tune composition:

1. Weigh required chromium oxide green amount
2. Add through alloy addition system
3. Blow argon to promote dissolution
4. Sample and analyze to confirm composition

4. Application Advantages

4.1 Cost Effectiveness

• Cost reduced by 30-50% compared to metal chromium
• High chromium recovery rate, less waste
• Simple process, easy operation

4.2 Quality Stability

• Stable chemical composition, small fluctuation
• Uniform particle size, controllable reaction
• Low impurity content, does not affect steel quality

5. Product Specifications

• CRM-98: Cr₂O₃≥98%, Smelting grade
• CRM-99: Cr₂O₃≥99%, High-end alloy grade
• Granular: 0.1-1mm, suitable for automatic feeding
• Powder: 200 mesh, suitable for ladle refining

Contact us for smelting application technical support and cost optimization solutions.