In June 2026, a talc production line with an annual capacity of 300,000 tonnes was officially commissioned in central China after three months of continuous operation. The results surprised even the plant owner: grinding efficiency, product fineness, system energy consumption and equipment stability all met — and in several respects exceeded — the design targets.

The 300,000 tpy talc grinding line in operation

The challenge: talc is soft, but notoriously hard to grind

Talc has a Mohs hardness of only 1, making it one of the softest minerals in nature. That may sound easy to grind — in fact, it is exactly the opposite. Because talc is so soft and slippery, the grinding rollers tend to slide over the material bed like a roller pressing on a bar of soap. Material slippage, an empty mill bed and sudden drops in output are the most common headaches at talc grinding plants.
The owner, a long-established talc producer, had been struggling with three problems: ageing grinding equipment that could not keep up with growing orders, rising electricity bills month after month, and constant anxiety over every environmental inspection. Before choosing a supplier, the company compared several mainstream grinding mill manufacturers — and finally selected CHAENG (Xinxiang Great Wall Machinery) based on strong referrals from industry peers.

The CHAENG GRM vertical roller mill solution

After a detailed analysis of the material characteristics, capacity target and process requirements, CHAENG's engineering team designed a vertical roller mill system dedicated to talc grinding. The principle behind the GRM mill is simple but effective: material-bed grinding plus a precise material-layer control system.
Instead of relying on brute crushing force, the GRM mill grinds "material against material". Feed rate, grinding pressure and air flow are automatically matched by the control system, which eliminates slippage at its root.

GRM vertical roller mill – main structure

After three months of continuous production, the actual project data delivered a perfect answer: grinding efficiency, product fineness, system energy consumption and equipment stability all reached or exceeded expectations.

Fine talc powder: from filler to high-value functional material

Talc powder finely ground by the CHAENG GRM vertical roller mill becomes a high-value functional material widely used in four major fields:

Four major application fields of fine talc powder

Six core advantages of CHAENG vertical roller mills
 

• Full size range. Table diameters from 1,600 mm to 6,000 mm — there is always a model that exactly matches your capacity, whether for dolomite, calcite, magnesite, limestone, kaolin, fluorite or pyrophyllite.
• No metal contamination. Hardfaced wear-resistant materials and grinding without direct metal contact keep whiteness and purity high — and whiteness is pricing power for non-metallic minerals.
• Grinding and drying in one step. Wet raw material with moisture up to 15% can be fed directly into the mill, eliminating a separate dryer and saving equipment, floor space and operating costs.
• Low power consumption. System electricity consumption of only 35–37 kWh/t — 20–30% lower than a traditional ball mill. The savings pay for another piece of equipment within a year.
• High fineness. Product specific surface area up to 400–1,000 m²/kg, upgrading your product from low-end filler to high-value functional material.
• Environmentally compliant. Negative-pressure process with dust emission concentration ≤ 10 mg/m³, below the national standard — passed environmental acceptance at the first attempt.One mill for 20+ non-metallic minerals

 

One mill for 20+ non-metallic minerals

 

Besides talc, CHAENG vertical roller mills grind dolomite, calcite, magnesite, fluorite, pyrophyllite, phosphate rock and more than 20 other materials — from industrial waste slag to non-metallic and non-ferrous metal minerals.

Typical non-metallic minerals processed by CHAENG mills

60 years of grinding expertise

Founded in 1958, CHAENG (Xinxiang Great Wall Machinery) is a national high-tech enterprise, a national service-oriented manufacturing demonstration enterprise and a national green factory. Over more than six decades it has produced over 200 sets of GRM series vertical roller mills, delivered across China and exported to more than 60 countries and regions, including the United States, Russia, Japan, Brazil, India, South Korea, Vietnam, Kenya and Iran.

Looking for a reliable vertical roller mill manufacturer for your talc or non-metallic mineral project? Contact CHAENG for a free customized grinding solution and quotation.