Three Roll Mill For Attapulgite

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Three Roll Mill For Attapulgite

Three Roll Mill

Three roll mill is the main equipment for grinding attapulgite. The attapulgite is ground and dispersed mainly because it is a natural colloid. Even if the size of the attapulgite reaches 0.1mm, it cannot be easily dispersed by the machine, so the final state of attapulgite formation has been greatly developed.The three roll mills can adjust the gap between the three rollers in the horizontal direction by turning the handwheel, squeezing each other on the surface of the rollers, and friction at different speeds to achieve grinding dispersion.

Details of Three Roll Mill

Two types: handwheel and digital control gap
Safe scraper socket, Emergency-stop
Space-saving desktop models
Drip tray for easy cleaning

Application: Paint, Adhesive, Battery, Pharmaceutical industry, Cosmetic

To grind the three roll mill better, FRANLI has experimented several times to replace the main castings rack structure which can not withstand this high-strength operation. It uses a steel structure rack, roll head enlargement, flange reinforcement, top rod thickening, and gear oil-immersed, which maximizes the life of the machine and greatly enhances the strength-bearing capacity of the machine.

Attapulgite, under the strong squeezing, grinding, and dispersing action of Three roll mill, breaks down the electrostatic attraction and intermolecular force between single crystal particles in the attapulgite fibrous aggregate, tears apart the fibrous crystal, making it easier to disperse in water, increases its viscosity to 5-10 times that of the original, and the device is produced in an extremely high-intensity environment, and maintains good long-term nondestructive performance. It reduces the cost of maintenance and shutdown due to mechanical damage, ensures the normal operation of the enterprise, and greatly saves the manpower, material resources, and financial resources of the company.

Three roll mill is mainly used for all kinds of paste materials such as paints, ink, plastics, pigments, food, etc. It is especially suitable for grinding products with high dispersive viscosity and fine grain requirements. Rollers are centrifugally poured with cold hard alloy cast iron with a compact crystalline phase, high strength, high surface hardness, and abrasion resistance, and have a cooling system. The factory also produces electric heating, steam heating type Three roll mill, granite roll, ceramic roll, and never rust roll of various specifications Three roll mill.

Three roll mill structure and how it works

Three roll mill is one of the most common pulp grinding devices. It is mainly composed of rollers, material stoppers, distance adjustment devices, feeding devices, transmission devices, and rack.

The rollers of the three roll mill are the places where the material is cut and squeezed. The baffle (copper baffle) is located between the middle and slow rollers. The position of the copper baffle can be adjusted by the screw to prevent material from entering the bearings at both ends of the rollers when feeding. The function of the distance adjustment device is to adjust the distance between rollers and the compression force and to change the shearing and extrusion of materials to meet the grinding requirements. The discharging device (scraper blade) is made of a steel plate and sticks to the surface of the quick roll to scrape off the slurry on the surface of the roll.

To facilitate scraping off the slurry on the surface of the quick roll, the cutter position should be set higher than the axis of the roll. The drive unit is composed of a motor, decelerator, coupling, and speed ratio gear. Its function is to provide the required torque and speed for each roller. The motor is driven by a triangular belt, and after passing through the decelerator, the coupling directly passes into the medium-speed roll, then the speed ratio gear drives the fast and slow rolls to rotate in the same direction. Usually, the speed ratio of three rollers is 1:3:9. The rack is a supporting part of rollers, distance adjustment devices, etc.

When the Three roll mill is working, the three rollers rotate slowly, moderately, and rapidly with a certain speed ratio driven by the drive. In the Three roll mill, materials with poor dispersivity are squeezed and sheared by the rollers because the rollers turn in opposite directions and there is a pressure and speed difference between them. Material is first crushed between the medium and slow rollers, then ground in the gap between the medium and fast rollers, and finally coated on the fast rollers, scraped off by the scraper blade. To achieve uniform grinding, the material usually needs to be ground 2-3 times. The grinding fineness can be measured by the fineness plate and can reach a minimum of 1um according to the characteristics of the material.

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Guidelines For Three Roll Mill

Three roll mills are widely used in a variety of chemical industries, from medium to high viscosity productions. FRANLI machine can break open all kinds of pigment, UV ink, offset ink, decorative paints, and Lubricants, it also can catch the greatest fineness in cosmetics/ lipstick and electronics industries.