Processing of 1500 mesh heavy calcium carbonate powder with an ultra-fine grinder

Heavy calcium carbonate, also known as ground calcium carbonate (GCC), is widely used in various industries due to its excellent physical and chemical properties. The demand for high-quality, ultra-fine heavy calcium carbonate powder, especially at a mesh size of 1500, is increasing rapidly.

1. Importance of 1500 Mesh Heavy Calcium Carbonate Powder

The 1500 mesh heavy calcium carbonate powder refers to a powder with a particle size of approximately 10 microns. This ultra-fine powder offers several advantages:

Enhanced Whiteness and Purity

The ultra-fine powder has a higher degree of whiteness and purity, making it suitable for applications in industries such as plastics, paint, and paper where color and quality are paramount.

Improved Physical Properties

The fine particle size of the powder contributes to better dispersion, which in turn enhances the physical properties of the final product, including mechanical strength and surface smoothness.

2. Ultra-Fine Grinder Technology

To achieve the production of 1500 mesh heavy calcium carbonate powder, an ultra-fine grinder is essential. These grinders employ advanced technology to ensure the precision and efficiency required for such fine grinding.

Grinder Types

Several types of ultra-fine grinders can be used for this purpose, including:

- Raymond Mill: An updated version with a high-pressure suspension grinder can produce particles in the range of 325-1500 mesh.

- Vertical Roller Mill: Known for its energy efficiency, this mill can grind materials to a fine particle size.

- Jet Mill: Utilizing a high-speed airflow to impact and grind materials, jet mills are capable of producing particles below 10 microns.

Grinding Process

The grinding process for producing 1500 mesh heavy calcium carbonate powder involves the following steps:

- Feeding: Raw calcium carbonate lumps are fed into the grinder.

- Crushing: The lumps are crushed into smaller particles to prepare them for fine grinding.

- Grinding: The crushed particles are ground repeatedly between the grinding disc and the ring until they reach the desired fineness.

- Classification: A classifier is used to separate particles that meet the 1500 mesh specification from those that do not.

- Collection: The qualified powder is collected using a dust collection system.

3. Challenges in Ultra-Fine Grinding

Producing 1500 mesh heavy calcium carbonate powder presents several challenges:

Equipment Wear

The fine grinding process causes significant wear on the grinder components, requiring the use of high-quality, wear-resistant materials.

Particle Size Control

Maintaining a consistent particle size distribution at such a fine level requires precise control of the grinding process parameters.