About Kaolin
Kaolin is a white or clay-like rock with various hues, mainly composed of tiny flake or tubular kaolinite crystals smaller than 2 microns. The pure kaolin is white, fine, soft and soft, with good plasticity and fire resistance and other physical and chemical properties. Its mineral composition is mainly composed of kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar and other minerals. Kaolin is divided into three types: hard kaolin, soft kaolin and sandy kaolin.
Kaolin process
At present, all applications of kaolin must be processed into fine powder by a milling machine before it can be added to other materials to be fully integrated. Conventional equipment for processing fine powder of kaolin below 400 mesh is Raymond mill, high-pressure medium-speed mill, etc., which can process kaolin ore into finished products with different specifications of 80-600 mesh.
The complete configuration of kaolin mill includes jaw crusher, bucket elevator, vibrating feeder, mill host, classifier, powder collector, pulse dust removal system, air compressor, electrical control system, and corresponding milling machine The supporting milling equipment.
Kaolin application field
Kaolin has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, medicine and national defense. Kaolin is widely used in the paper industry. There are two main areas, one is the filler used in the papermaking process, and the other is the pigment used in the surface coating process. Kaolin is used in papermaking, which can give the paper good covering performance and good walking gloss performance. It can also increase the whiteness, opacity, smoothness and printability of the paper, and greatly improve the quality of the paper.
Development prospects of kaolin grinder for powder
With the development of economy and science and technology, the application range of kaolin is also expanding. The market coverage has expanded from single daily use, construction, ceramics, electric porcelain, refractory materials to dozens of industries such as papermaking, petrochemicals, rubber, plastics, coatings, etc. Especially in recent years, the demand of the high-tech industry has put forward new issues for kaolin products, and ultra-fine, magnetic separation, modification, bleaching, and calcined clays were born accordingly. The market demand for kaolin continues to rise, which has prompted a very optimistic outlook for the kaolin milling industry, and the demand for kaolin grinder mill equipment will continue to increase.
Recommended powder grinder for gaolin
Kaolin Raymond roller mill
Capacity: 1-30 t/h
Max feeding size: 20 mm
Processing ability: 1-30 t/h
Range of application: Feldspar, calcite, limestone, talc, barite, rare earth, marble, phosphate ore, kaolin, bentonite, gypsum, Perlite diatomite, dolomite etc.
The working principle of kaolin grinder for powder
1. When working, the main motor of the kaolin mill drives the main shaft and the turntable to rotate through the reducer, and the roller pins on the edge of the turntable drive dozens of grinding rollers to roll in the ring raceway.
2. The kaolin raw mineral material is crushed into small particles by a hammer crusher, and then sent to the storage bin by the elevator, and then through the vibrating feeder and the inclined feeding pipe, the kaolin particles are evenly sent to the bulk material on the upper part of the turntable On the disk.
3. The kaolin particles are scattered to the periphery of the circle under the action of centrifugal force, and fall into the raceway of the grinding ring and are impacted, rolled, and ground by the ring rollers. After three-layer ring processing, they become kaolin powder. The high-pressure fan sucks The outside air is sucked into the machine, and the crushed kaolin powder is brought into the classifier.
4. The rotating impeller in the classifier makes the coarse kaolin powder fall back and regrind, and the fine powder that meets the requirements enters the cyclone powder collector with the airflow and is discharged by the discharge valve at its lower part, which is the superfine kaolin powder with a small amount. The airflow of fine dust passes through the fan and muffler after being purified by the pulse dust collector.
Performance advantage of kaolin grinder for powder
1. Long service life of wearing parts: the grinding roller and grinding ring are forged with special materials, which greatly improves the utilization. In the case of the same fineness of materials and finished products, the service life is 2-5 times longer than the wear parts of impact crushers and turbo crushers, generally up to more than one year. When processing calcium carbonate and calcite, the service life can be up to 2 -5 years.
2. Low investment cost: Because it integrates crushing, drying, grinding, and grading conveying, the system is simple, the layout is compact, the area is about 50% of the ball mill system, and it can be laid out in the open air, so it can greatly reduce the investment cost.
3. Stable product quality: Because the material stays in the mill for a short time, it is easy to detect and control the particle size and chemical composition of the product, reduce repeated grinding, and stabilize the product quality.
4. High grinding efficiency: The grinding roller is used to directly grind the ground material on the grinding disc, which has low energy consumption and saves energy consumption by 30%-40% compared with the ball milling system.