Pin Mill Modification Process

The dual rotors rotate at a relatively high speed (linear velocity exceeding 200 meters per second), dispersing materials through impact, shearing and friction while generating heat via friction to meet the requirements for powder surface coating.

How it works

The pin mill is a high-efficiency ultrafine grinding and **integrated modification equipment**. Its core consists of two grinding discs that can rotate independently at high speed (or one rotating and one stationary), with needle-shaped/tooth-shaped elements evenly distributed on the disc surfaces. For calcium carbonate powder processing requirements, during operation, the relative high-speed movement of the two discs generates intense shearing, impact and grinding forces. While rapidly grinding precipitated calcium carbonate (PCC) and ground calcium carbonate (GCC) to micron or even nanometer scale, it can fully break up agglomerated powder particles, increase their specific surface area, enable modifiers to form uniform and tight coating adhesion on the surfaces of calcium carbonate particles, and simultaneously complete ultrafine grinding and high-efficiency modification operations, thus greatly improving the downstream application suitability of calcium carbonate powder.

Performance and features

Wide Application Range

It can efficiently activate and modify various inorganic mineral powders, and is particularly suitable for different types of calcium carbonate powders such as precipitated calcium carbonate (PCC) and ground calcium carbonate (GCC). There is no need to modify the core structure of the equipment to meet the diverse surface modification processing requirements of calcium carbonate.
Excellent Coating Effect

It can accurately measure the ratio of calcium carbonate materials to modifiers, ensure their full contact and uniform coating, effectively improve the surface activity of calcium carbonate particles, and produce finished powders with stable quality, which can better meet the stringent standards of downstream applications.
Comprehensive Modification Functions

The calcium carbonate powder after treatment has significantly improved dispersibility, with the prominent advantages of viscosity reduction and filling enhancement. At the same time, it can strengthen the interface bonding performance between calcium carbonate and polymer materials, providing a better raw material foundation for subsequent product processing.
Economical and Convenient Operation

The equipment has a high degree of automation and outstanding processing efficiency in calcium carbonate modification, which can effectively shorten the production cycle and reduce labor and operation costs. The modified calcium carbonate can be widely used in plastics, rubber and other fields to improve the comprehensive performance of products.

Technical Parameters

Parameters / Model	250	360	500	630	800	1000
Grinding disc diameter (mm)	250	400	500	630	800	1000
Maximum speed on Case side (r/min)	8000	5200	4200	3300	2800	2250
Maximum speed on Door side (r/min)	4500	4000	3600	3000	2500	2000
Case side Power (kW)	11	37	45	55	90~110	132~160
Door side Power (kW)	7.5	22	30	55	90~110	132~160
Particle size (mesh)	20~120	20~120	20~120	20~120	20~120	20~120
Output (kg/h)	100~600	200~1000	400~2000	1000~5000	2000~8000	3000~12000

Related Processes & equipment

Cyclone Mill Modification Process

This calcium carbonate modification process using a cyclone mill boasts prominent advantages. Its strong airflow cyclone effect ensures full contact between modifiers and calcium carbonate particles, enabling efficient and uniform dispersion and coating. Equipped with an adjustable classification structure, it has a wide particle size adaptability range. Combined with variable frequency temperature control design, it guarantees stable product quality. The automatic feeding system reduces costs and improves efficiency. The flexible process is compatible with upstream and downstream procedures, integrating multiple functions for energy conservation and easy maintenance.

Learn more about Cyclone Mill Modification Process

Turbo Mill Modification Process

The powerful vortex field can quickly impact and break up the agglomerated particle clusters in calcium carbonate powder, efficiently dissociating the agglomeration structure and fully exposing each calcium carbonate particle. At the same time, the vortex drives the modifier to collide with and closely contact the calcium carbonate particles at high speed, achieving uniform coating synchronously during the particle dissociation process and realizing the integrated operation of dissociation, dispersion and surface modification of calcium carbonate powder.

Learn more about Turbo Mill Modification Process

Three-roller Mill Modification Process

The three-roll mill modification process leverages the relative motion of three rotors. By adjusting the action mode of cyclones and eddies inside the equipment, it achieves surface coating modification of powder particles.

Learn more about Three-roller Mill Modification Process

Mechanical Fusion Machine Modification Process

This equipment adopts a batch operation mode, making it particularly suitable for the modification scenarios of calcium carbonate powder with additives such as silanes that require high temperature and long reaction time. It is equipped with built-in heating and timing devices to precisely control the temperature and reaction duration of calcium carbonate modification. The inner lining can be made of optional ceramic materials to achieve zero metal contamination of calcium carbonate powder. It drives the full mixing and integration of calcium carbonate materials and modifiers through mechanical force, enhancing the coating modification effect.

Learn more about Mechanical Fusion Machine Modification Process

Preliminary Crushing

Grinding & Classification

Surface Modification