Kaolin has wide applications, mainly for paper making, ceramics and refractory materials, followed by coatings, rubber fillers, enamel glaze and white cement raw materials. With the further improvement of mineral processing technology of kaolin, the application scope of kaolin will be increasingly extensive.
However, all applications of kaolin must be processed into fine powder before it can be added to other materials for complete integration. So, we need kaolin processing plant machinery.
The beneficiation processing of kaolin can be divided into dry processing and wet processing.
Generally, the dry processing method is to crush the mined raw kaolin ore to about 25mm through the crusher and feed it into the cage crusher to reduce the particle size to about 6mm. The crushed ore is further refined by Raymond mill equipped with centrifugal separator and cyclone dust remover. This process can remove most of the sand and gravel, and is suitable for processing kaolin with high whiteness of raw ore, low sand and gravel content and suitable particle size distribution. Dry processing method has low production cost, and the products are usually used as low price fillers in rubber, plastic, paper and other industries.
The wet processing method generally crushes the raw kaolin ore, and then passes through pulping, desanding, cyclone classification, peeling, centrifuge classification, magnetic separation (or bleaching), concentration, filter pressing, and drying. The products thus obtained can be used for ceramic or paper coating. If you want to produce filler grade or paper coating grade kaolin, the calcination process needs to be added, that is, raw ore crushing, slurry ramming, cyclone classification, flaking, centrifugal classification, concentration, filter pressing, internal steam drying, calcination, depolymerization, etc.
Before kaolin is applied in these industries, we need kaolin processing plant machinery to process kaolin into powder.
Vertical roller mill and Raymond mill can be adopted for 80-400 mesh kaolin milling. Raymond mill is selected for those with low investment cost, and vertical roller mill is selected for those with large output capacity.
Kaolin grinding process is as follows:
Tip: Select the main machine according to the output capacity and fineness requirements;
Phase I: crushing of raw materials
Large blocks of kaolin are crushed by the crusher to the feed fineness (15mm-30mm) that can enter the grinding mill.
Stage II: Grinding
The crushed small particles of kaolin are sent to the storage hopper by the elevator, and then sent to the grinding chamber of the mill for grinding in a uniform and quantitative manner by the feeder.
Stage III: Grading
The material after grinding is graded by the grading system, and the unqualified powder is graded by the grader and returned to the host machine for regrinding.
Stage IV: Collection of finished products
The fine powder enters the dust collector along with the air flow through the pipeline for separation and collection. The collected finished powder is sent to the finished product silo through the outlet by the conveyor, and then uniformly packaged with powder loading tanker or automatic packer.
While being used for kaolin processing, SBM vertical roller mill has the following advantages:
1. Leading technology
LM vertical roller mill is simple in process, integrating crushing, drying, grinding, powder selection and transportation into one set, compact in layout, small in floor area, and reducing the investment in civil engineering and equipment. It adopts the principle of material layer crushing and the automatic pressure technology of grinding roller, with high efficiency.
2. Low operation cost
The equipment is easy to operate and has a hydraulic roll turnover device. During maintenance, the grinding roller can be completely turned out of the machine, which is convenient for maintenance. In addition, the grinding roller adopts automatic lubrication system, which requires no manual work and has low operation and maintenance costs.
3. High degree of automation
Fully automatic control system is adopted to realize remote control and easy operation.
4. High efficiency and environmental protection
The whole system operates under negative pressure, without dust overflow, with high grinding efficiency and low energy consumption, saving 40% - 50% of power consumption compared with traditional Raymond mill and ball mill.
5. Automatic slag removal, high finished product grade
The retention time of materials in the mill is short, and the pollution of finished products is small. When producing different kinds of kaolin, the impurities in raw materials can be effectively discharged to improve the purity of the product and effectively enhance the added value of the product.
6. Large output, wide adaptability and simple operation
Compared with the combined grinding system of traditional Raymond mill and ball mill, vertical roller mill has the advantages of large output, wide adaptability, simple operation, rapid adjustment, low use and maintenance cost, energy saving, etc., and is the preferred choice for deep processing of kaolin.
Raymond mill is also frequent used grinding equipment for kaolin processing. It has the following advantages:
1. good dust collection
The equipment adopts pulse dust collector to collect dust, and the efficiency can reach 99%, which is favored by many customers.
2. stable performance
The whole set of equipment has low vibration, low noise, stable operation and good performance. It adopts plum blossom frame and grinding roller device, so it is very reliable.
3. high output capacity
Compared with ordinary mills, Raymond mill made more than a little progress in production capacity, increasing production by more than 40%, and saving power consumption by more than 30%.
4. Simple maintenance
The grinding roller device does not need to be removed for grinding ring maintenance, which saves time and is more convenient.
The choice of kaolin processing plant machinery means a lot to the production efficiency of the whole production line. As a professional manufacturer, SBM has good reputation in China and abroad. If you want to know more about the kaolin processing plant machinery, especially the grinding mill, you can contact SBM!
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