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Ultrafine Kaolin Vertical Grinding Mill

Ultrafine Kaolin Vertical Grinding Mill

The industrial kaolin vertical roller mill is a high-capacity, energy-saving grinding solution for ultrafine kaolin powder, achieving 325–2500 mesh fineness with stable output and low power consumption — ideal for coal measure kaolin and washed kaolin processing lines.

Item No :
Kaolin Vertical Roller Mill
Order(MOQ) :
1
Payment :
Negotiation
Product Origin :
Hefei,China
Color :
Customize
Shipping Port :
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Lead Time :
Negotiation
Weight :
Based on actual

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Ultrafine Kaolin Vertical Grinding Mill

Product Overview
Kaolin vertical roller mill is a high-output, energy-saving unit for ultrafine kaolin powder. It combines crushing, drying, grinding, classification and conveying, producing 325–2500 mesh powder with steady yield and low power use. Ideal for coal-measure and washed kaolin lines requiring uniform particle size and low contamination.

Compared with ball mills, its hydraulic grinding system directly compresses materials on the grinding table, cutting energy consumption by 30–50% for the same fineness. The built-in classifier delivers tight particle distribution, and sealed negative-pressure operation controls dust far below emission standards.

Key Features for Kaolin Processing

1. Tailored for Coal Measure Kaolin

Specially optimized roller & liner profile for abrasive coal measure kaolin. Hydraulic loading stabilizes grinding pressure to adapt to fluctuating feed size of raw/calcined kaolin.

2. Tight Particle Size Distribution

Built-in dynamic classifier adjusts fineness online. Multi-rotor design ensures stable D97 for paper coating, ceramic glaze and other strict-granularity scenarios.

3. Low Wear & Maintenance

High-chromium alloy rollers and liners; reversible rollers prolong service life. Spare part cost ~40% lower than ordinary vertical mills.

4. Fully Sealed Negative Pressure

Equipped with pulse bag filter, dust emission＜20 mg/m³. Complies with environmental standards and satisfies high-cleanliness needs for paper filler, pharmaceutical kaolin.

Technical Specifications

Model specification	HVM800X		HVM1250X	HVM1300X	HVM1500X	HVM1700X	HVM1900X	HVM2400X	HVM2800X
Capacity	1~3 t/h	2~7 t/h		3~10 t/h	4~15 t/h	6~22 t/h	7.5~25 t/h	9~38 t/h	11~45 t/h
Grinding material moisture	≤5%
Product fineness	（10~40um）97%
Product moisture	≤1%
Main Motor Power	55 kW	132 kW		180 kW	250 kW	355/400 kW	450 kW	560/630 kW	710 kW
Description	Note: 1. The above technical indicators are based on materials with Mohs hardness of 3~4. 2. Product fineness can reach 10 microns (1250 mesh)

Working Principle

An electric motor drives the grinding table to rotate via a gearbox. Material enters through the feed inlet and lands at the center of the grinding table, while hot gas simultaneously enters the mill through the air inlet. Under the effect of centrifugal force, the material moves toward the edge of the grinding table, where it is crushed under the grinding rollers as it passes through the annular groove on the table. The crushed material is then swept up by the high-velocity gas stream at the air ring near the edge of the table. Larger particles fall directly back onto the grinding table for re-grinding. When the material-laden gas stream passes through the dynamic-static separator, the action of the rotating rotor causes coarse particles to fall back onto the grinding table for further grinding, while the qualified fine powder exits the mill with the airflow and is collected by the powder collection device as the final product. Moist material is dried through contact with the hot gas stream during this process until the required product moisture level is achieved.

Vertical Mill

vertical roller mill for gypsum

Applications

Paper & Coating;Ceramics & Refractories;Paints & Coatings;Calcined kaolin;Rubber & Plastics;Washed kaolin, surface-modified kaolin;Fiberglass & Glass

FAQ

Q1: What fineness can a vertical roller mill achieve for kaolin?

A: Standard configuration: 325–1250 mesh (10–45 μm). With a secondary classifier, down to 5 μm (~2500 mesh) for paper coating and pharmaceutical fillers.

Q2: How does it compare to a ball mill for kaolin grinding?

A: 30–50% lower power per ton at equivalent fineness, narrower particle size distribution, and only 45–60% of the floor space. Integrated drying handles feed moisture up to 5% without an external dryer.

Q3: Can this mill handle high-moisture kaolin?

A: Yes, up to 5% moisture via the integrated hot-air generator. Higher moisture requires a pre-drying system. The air-swept design dries and grinds simultaneously.

Q4: What is the typical maintenance schedule?

A: Inspect rollers and table liners every 1,500–2,000 hours. Invertible rollers and centralized lubrication keep routine maintenance to about one shift per month; major overhaul intervals exceed 8,000 hours.

Q5: Is it suitable for both raw and calcined kaolin?

A: Yes. The hydraulic system auto-adjusts pressure for different hardness. For abrasive calcined kaolin, we recommend a ceramic-lined classifier and extra roller-path wear protection.

Case

★ Project Name: Nigeria Annual Production 200000 Tons Natural Gypsum Calcination Production Line

★ Type of processed material: natural gypsum

★ Production capacity: ≥ 35t/h

★ Product fineness: 120 mesh, 90% pass

FAQ

Typical Technical Questions about Gypsum Vertical Roller Mill:

Q1: What is the maximum moisture content of gypsum that the vertical roller mill can handle?

A: The standard configuration handles feed moisture ≤5%. For higher‑moisture materials (e.g. FGD gypsum with 10‑15% moisture), a hot‑air drying system can be equipped to realize simultaneous drying inside the mill.

Q2: What is the service life of grinding rollers and grinding table liners?

A: Made of high‑chromium cast iron or ceramic composite materials. Under normal gypsum grinding conditions, the service life of grinding rollers ranges from 6,000 to 10,000 hours, while liners last 12,000‑18,000 hours. Actual service life depends on material abrasiveness and fineness requirements.

Q3: Can the output fineness be adjusted?

A: Yes. The fineness can be adjusted within the range of 80‑600 mesh by variable‑frequency control of the classifier rotating speed, without shutdown or component replacement.

Q4: What are the differences between vertical roller mill and ball mill for gypsum grinding?

A: The vertical roller mill system features 30‑40% lower power consumption, over 50% smaller footprint and lower noise (<85 dB), with more flexible output fineness adjustment. However, it has certain requirements on feed particle size and feed moisture.

Why Choose Hefei Hengcheng?