Chromium Oxide Green Powder Grinding Machine

15/10/2025 admin

Using the HGM Ultrafine Grinding Machine to process Chromium Oxide Green (Cr₂O₃) is an efficient way to achieve high fineness, uniform particle size distribution, and stable pigment quality, especially for paint, coating, and ceramic applications.

About Chromium Oxide Green

Chromium Oxide Green (Cr₂O₃) is an inorganic green pigment widely used in paints, coatings, plastics, ceramics, and other industrial applications due to its excellent stability, strong tinting power, and chemical resistance.

Key Advantages of Chromium Oxide Green

1. Outstanding chemical resistance – resistant to acids, alkalis, and solvents.
2. Excellent light and weather fastness – ideal for outdoor coatings.
3. High thermal stability – suitable for ceramics and refractory materials.
4. Non-bleeding and non-migrating – stable in plastics and coatings.
5. Non-toxic and environmentally friendly – compliant with EU REACH and RoHS regulations.

Main Applications of Chromium Oxide Green

1. Paints & Coatings

Used in industrial coatings, automotive paints, and camouflage coatings.
Provides durable color with excellent UV and chemical resistance.

2. Plastics & Rubber

Compatible with PVC, PE, PP, and rubber compounds.
Offers stable green color under high processing temperatures.

3. Ceramics & Glass

Used for coloring ceramics, enamel, and glass.
High temperature resistance ensures no fading during firing.

4. Construction Materials

Applied in roof tiles, concrete, and paving stones for long-lasting color.

5. Abrasives & Polishing

Used in polishing compounds for metals and optical glass (known as “green rouge”).

Common Chemical and Trade Names of Chromium Oxide Green

· Chromium(III) Oxide
· Chromium Sesquioxide
· Chromic Oxide
· Chromia
· Chromium Trioxide (Green Form) (not to be confused with CrO₃, which is red and toxic)
· Green Chromium Oxide
· Guignet’s Green (historical pigment name, though it can sometimes refer to hydrated chromium oxide)
· Pigment Green 17 (C.I. 77288)
· Chrome Oxide Green
· Chromium Oxide Pigment

How to Use HGM Ultrafine Grinding Machine to Process Chromium Oxide Green

While chromium oxide green (Cr₂O₃) is already a stable pigment, further ultrafine grinding is often required to:

Achieve fine particle size (D50 = 2–10 μm) for smooth surface finish in coatings or plastics.
Improve color strength and dispersibility.
Enhance opacity and tinting power.
Increase compatibility in polymer or ceramic systems.

HGM Ultrafine Grinding Machine Model Options

HGM Ultrafine Grinding Machine is a high-efficiency industrial grinding machine designed for producing ultrafine powders.
Model: HGM80 / HGM100 / HGM125 / HGM1680L
Select model based on capacity demand (0.5–45 tons/hour).

Main Technical Features

Item	Specification
Feeding Size	≤20 mm
Finished Fineness	325–3000 mesh (D97 = 45–5 μm, D50 up to 2 μm)
Capacity	0.5–45 t/h (depending on model & fineness)
Moisture Requirement	<5%
Grinding Principle	Multi-ring and multi-roller grinding with high-pressure air classifier
Output Powder Form	Uniform, high surface area, non-agglomerated powder

Process Flow of Cr₂O₃ Grinding Using HGM Ultrafine Mill Machine

Chromium Oxide Green Powder Grinding Machine-SBM Ultrafine Powder Technology

Step 1: Pre-crushing

Raw chromium oxide green blocks or coarse powder are crushed by a jaw crusher or hammer crusher.
Particle size reduced to <10–20 mm to ensure smooth feeding.

Step 2: Feeding

Crushed material is fed by vibrating feeder or screw feeder into the HGM main unit.
Feed rate is controlled to maintain a steady grinding pressure.

Step 3: Grinding in HGM Ultrafine Mill Main Unit

Material is sheared and crushed by multiple grinding rollers and rings under high pressure.
Simultaneously, hot air (or temperature-controlled airflow) removes residual moisture and carries fine particles upward.

Step 4: Classification

Inside the mill, the built-in classifier wheel separates fine and coarse powder:
- Fine powder meeting target fineness passes to the dust collector.
- Coarse particles are returned to the grinding zone for regrinding.

Step 5: Collection

Qualified Cr₂O₃ ultrafine powder is collected by a pulse dust collector or cyclone separator.
Product is discharged through an automatic valve or screw conveyor into storage silos.

Key Advantages of HGM Ultrafine Mill Machine for Cr₂O₃ Processing

High Fineness & Uniformity – Adjustable from 325–3000 mesh with narrow PSD.
Low Contamination – Non-metallic liners reduce iron or foreign impurities.
Energy Efficient – Lower specific power than jet mill or ball mill for same fineness.
Closed System – Dust-free operation ensures clean environment and consistent color.
High Throughput – Suitable for continuous industrial pigment production.
Stable Operation – Automatic PLC control for feed rate, classifier speed, and temperature.

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