Adjustable Industrial Dolomite Grinder Dolomite Powder Mill (80-400 Mesh) | Vertical Grinding Machine

Adjustable Industrial Dolomite Grinder Dolomite Powder Mill (80-400 Mesh) | Vertical Grinding Machine

Description

Dolomite Vertical Roller Mill - Material Versatility & Adaptability

1. Multi-Material Compatibility

The dolomite vertical roller mill (VRM) is engineered for broad applicability, efficiently processing various non-metallic minerals beyond dolomite, including:

• Calcite

• Marble

• Limestone

• Heavy calcium carbonate (HCC)

• Talc

• Barite

This universal grinding system meets diverse industrial demands for ultra-fine powder production (80-3000 mesh), offering a one-stop solution for multi-material processing needs.

2. Moisture Tolerance

• Handles materials with up to 6% moisture content without pre-drying.

• Eliminates excessive drying steps for slightly wet dolomite, enhancing production flexibility and energy efficiency.

• Maintains stable grinding performance even with humid feedstocks.

Dolomite Vertical Mill Key Advantages:
* Reduced preprocessing costs
* Faster production cycles
* Lower thermal energy consumption

Dolomite Roller Mill Working principle: The electric motor drives the grinding disc to rotate through a reducer, and the material falls into the center of the grinding disc from the feeding port. At the same time, hot air enters the grinding chamber from the air inlet. Under the action of centrifugal force, the material moves towards the edge of the grinding disc and is crushed by the grinding roller when passing through the circular groove on the grinding disc. The crushed material is carried up by the high-speed airflow at the edge of the grinding disc, and large particles directly fall onto the grinding disc for re grinding. When the material in the airflow passes through the dynamic and static separator, under the action of the rotating rotor, the coarse powder falls onto the grinding disc for re grinding, and qualified fine powder is discharged with the airflow, Collect in the powder collection device, which is the product. Materials containing moisture are dried during contact with hot gases to achieve the required product moisture.

Technical Parameters Table

Re:The data based on Mohs'hardness 3-4 material
The product fineness can reach 10 um(1250 meshes)
 

The Three-Stage Processing System of Vertical Roller Mills

1. Raw Material Pre-Treatment: Precision Crushing Process

The dolomite VRM process begins with scientifically controlled crushing. Using impact crushers or cone crushers for intermediate crushing, the material is reduced to 10–50 mm particles. Special attention must be paid to dolomite’s Mohs hardness of 3.5–4, as excessive iron or manganese content may hinder grinding efficiency. Modern crushing systems ensure continuous material flow via synchronized vibrating feeders and bucket elevators, delivering uniformly sized feedstock to the VRM.

2. Core Grinding: Sophisticated VRM Mechanism

The VRM’s core features a multi-tiered grinding track design. Dozens of alloy-forged grinding rollers rotate along the grinding ring under centrifugal force, applying triple-action forces: impact, rolling, and shear. A high-pressure blower generates airflow (15–20 m/s) to transport crushed material to the dynamic classifier, where adjustable rotor speed precisely separates particles between 80–800 mesh. Multi-stage classification achieves ultra-fine powders up to 3,000 mesh.

In this closed-loop system:

• Coarse particles automatically recycle for regrinding.

• Qualified fines are collected via cyclone separators.

• Pulse-jet dust collectors capture 99.9% of particulates, maintaining workshop noise below 75 dB.

3. Product Refinement: Dual Control of Particle Size & Purity

Water treatment is critical for enhancing product quality. Post-sintering, materials undergo leaching, filtration, and drying to remove impurities, achieving industrial-grade calcium carbonate purity (≥99%).

The VRM system adapts to industry-specific demands:

• Construction materials: Single-tier grinding for 140–325 mesh powders.

• Ceramics: Multi-tier grinding + secondary classification for 1,600 mesh ultrafine powders.

• High-iron dolomite: Automatic roller pressure reduction prevents metallic contamination.
   

• Project Case:

• **Case Company:** An agricultural fertilizer company in Southeast Asia
  **Application Scenario:** Dolomite powder used as an acid soil conditioner, requiring a fineness of 100-325 mesh and purity >95%.
  **Achievements:**
  - The vertical mill system achieves closed-circuit production, ensuring uniform particle size distribution and low over-grinding rate.
  - The entire production line is equipped with dust removal and noise reduction designs, meeting EU environmental standards.