What is kaolin
Kaolin is a common clay mineral in nature, is also a very important non-metallic mineral, because of white, also known as dolomite. Pure kaolin is white, fine, soft soil, with good plasticity, fire resistance, suspension, adsorption and other physical properties. Kaolin resources are abundant in the world, with a total amount of about 20.9 billion tons. High-quality kaolin resources are widely distributed in China, the United States, the United Kingdom, Brazil, India, Bulgaria, Australia, Russia and other countries. China’s kaolin mineral resources rank among the top in the world, with 267 proven mineral sites and 2.91 billion tons of proven reserves.
Use of kaolin
With the continuous development of economy, kaolin plays an increasingly prominent role in social production and is an essential mineral material for national economic construction. It is also widely used in rubber, plastics, refractory materials, petroleum refining and other industrial sectors as well as agriculture and national defense advanced technology fields.
1. Paper industry:
Kaolin applied to paper, can give paper good covering performance and good coating gloss performance, but also increase the whiteness of paper, opacity, smoothness and printing suitability, greatly improve the quality of paper.
2. Ceramic industry:
The application of kaolin in ceramics is beneficial to the formation of mullite, improve its chemical stability and sintering strength.
3. Petrochemical Industry:
Kaolin can be used as a catalytic filler for petroleum cracking.
4. Coating industry:
The main function of kaolin in paint is filler and color substitute.
5. Rubber field:
Nano – kaolin can improve the elasticity, flexural resistance, dimensional stability, compression deformation and other properties of rubber.
The application of kaolin aqueous solution in fruit trees, grain, vegetables and other agricultural fields can greatly reduce production costs and pesticide residues in crops.
Kaolin grinding process
Stage 1: crushing
The feeding fineness (less than 30mm) of kaolin bulk material crushed by crusher can enter the mill.
The second stage: material grinding
Small pieces of broken kaolin material are sent to the raw material bin by the elevator, and then sent to the grinding room of the mill by the vibration feeder uniformly and quantitatively. After grinding, the grinding materials are graded by the analysis machine. Those whose fineness meets the specifications flow into the big cyclone collector with the wind. After collection, the fineness is discharged into the finished product through the discharge valve.
Stage 3: Storage or packaging of finished products in cans
The finished products discharged from the discharge valve are transported to the finished product tank for storage by pneumatic conveying equipment.
The finished products discharged from the unloading valve are packaged in small packages by double-mouth packaging machine.
③ The finished products discharged from the unloading valve are packed by tons of chartered aircraft.