Raymond mill processing tourmaline

• Publication time：2025-08-26
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Raymond Mill and Tourmaline

Tourmaline (also known as gem tourmaline) is a complex boron-containing cyclic silicate mineral. It possesses piezoelectricity and pyroelectricity, and can release negative ions and far-infrared rays. It is widely used in the electronics industry, cosmetics, environmental protection, and health fields. To fully utilize its value, Raymond mills are often used for fine processing. This equipment, based on the principle of extrusion and grinding between grinding rollers and rings, can efficiently process non-flammable and non-explosive materials with a Mohs hardness of ≤9.3 and a humidity below 6%. It is widely applicable in industries such as mining, building materials, and chemicals.

Key Points of Processing Tourmaline with Raymond Mill

High-purity Ceramic Linings and Grinding Rollers

The processing of tourmaline needs to avoid iron contamination. Raymond mills adopt high-purity ceramic linings and grinding rollers, which have high chemical stability and wear resistance, preventing iron contamination and ensuring product purity.

Efficient Cooling System

During processing, friction between the grinding rollers and rings generates heat, and high temperatures can damage the functionality of tourmaline. Raymond mills are equipped with a cooling system consisting of a water-cooled jacket and an optimized air path design, which can control the temperature and maintain its functionality.

Precise Classification System

Different fields have different requirements for the fineness of tourmaline powder, so precise classification is important. Raymond mills use high-precision turbine classifiers to ensure uniform and stable product fineness.

Strict Iron Removal Process

Even with high-purity ceramic linings and grinding rollers, trace iron impurities may still mix in during processing. Raymond mills are equipped with strong magnetic separators at the feed inlet and discharge outlet, and multiple iron removal steps ensure high product purity.

Control of Feed Particle Size

Controlling the feed particle size can improve grinding efficiency and equipment lifespan. Jaw crushers, roll crushers, etc., are commonly used to crush raw tourmaline ore to an appropriate particle size.

Process of Processing Tourmaline with Raymond Mill

Coarse Crushing

Jaw crushers crush large pieces of raw tourmaline ore into smaller particles.

Medium Crushing and Iron Removal

Roll crushers or cone crushers further crush the materials, and strong magnetic separators remove iron impurities.

Feeding

Electromagnetic vibrating feeders uniformly, quantitatively, and continuously feed tourmaline particles into the grinding chamber of the Raymond mill's main machine.

Grinding and Classification

The grinding rollers and rings grind the materials. The ground materials are classified by an analyzer; qualified fine powder enters the collection device, while coarse powder returns to the main machine.

Collection and Iron Removal

Cyclone collectors and pulse dust collectors collect the fine powder, and secondary iron removal ensures high product purity.

Packaging

Appropriate packaging materials are selected to ensure packaging tightness, and the product is packaged and stored in the warehouse.

Summary

Kronos Raymond mills achieve high-purity and fine processing of tourmaline through processes such as ceramic linings, efficient cooling, precise classification, and multiple iron removal steps.