System Introduction
Calcium carbonate powder surface treatment - commonly known as the "calcium carbonate particle coating" system, suitable for processing fillers used in PVC or other plastic production. Limestone powder or heavy calcium carbonate (GCC) fineness d97: 35 microns to 5 microns, precipitated calcium carbonate (PCC) fineness d50<0.1 microns

The important goal of this processing process is to achieve a balanced and complete distribution of the modifier in the calcium carbonate powder during processing. The amount of modifier added (weight ratio) accounts for 0.4-1.4% in heavy calcium carbonate modified products and 5% in precipitated calcium carbonate modified products. In order to evenly supply a large amount of calcium carbonate powder with this small amount of modifier, it is necessary to dissolve the modifier and mix it with the calcium carbonate powder.Mainly using natural or synthetic waxes (such as stearic acid) as modifiers.

Based on the successful experience of Alpine and Omya groups, we have developed three different continuous surface coating systems: needle disc grinding coating system, eddy current grinding coating system, and rotor grinding coating system.

The continuous powder surface coating modification system is a Chinese equipment designed and manufactured based on the digestion and absorption of German technology. It can be used for surface modification of various powders, such as calcium carbonate powder (heavy, precipitate), kaolin, talc, mica, graphite, barium sulfate, white carbon black, magnesium hydroxide, zinc oxide, aluminum oxide, etc. The system is suitable for various solid and liquid modifiers, such as aluminate coupling agent, titanate coupling agent, silane coupling agent, and stearic acid.

1. Needle disk grinding and wrapping system

2. Eddy current grinding coating system

3. Rotor grinding coating system