Technical advantages of kaolin vertical mill

Faced with the market gap for large-scale grinding machinery in China, domestic grinding mill companies represented by (HCM Machinery)Guilin Hongcheng Mining Equipment Manufacturing Co., Ltd. have begun to launch a strong attack on large-scale grinding machinery. Based on more than 20 years of experience in the design and application of grinding mills, our company has keenly discovered the market demand and developed the HLMX series of kaolin vertical mills. Today we will introduce to you the technical advantages of kaolin vertical mills.

The main structure of the kaolin vertical mill is: powder separator, upper polish body, lower polish body, frame, grinding device (grinding roller + grinding disc), transmission arm device (moving arm + moving arm), pressurizing device, It consists of a limit device, a driving device (main motor + main reducer), etc. Its technical advantages are mainly reflected in the following aspects:

(1) Stable material layer - reasonable grinding disc speed

The driving force of the kaolin vertical mill comes from the main motor, which drives the main reducer, thereby driving the grinding disc to rotate. According to the grinding and fineness differences of materials with different characteristics, the grinding speed of the grinding disc is different. The rotation speed of the grinding disc depends on the speed ratio of the reducer and the input speed of the main motor. It is one of the important technical parameters of vertical mill.

In order to improve the grinding efficiency of the mill and the fineness of the product, it is first necessary to ensure that the material forms a stable material layer on the grinding disc, so the grinding disc speed must match the grinding speed of the material. Since the kaolin is earthy, the grinding particle size is small, and the fineness of the finished product is required to be high. In order to control the reasonable flow rate of materials on the grinding disc and form a stable grinding material layer, in principle, the rotation speed of the grinding disc is reduced, but excessive reduction will cause Material accumulates on the grinding disc, affecting grinding efficiency. Therefore, by drawing on the disc rotation speed design of our company's pyrophyllite mill and adopting frequency conversion control of the main motor, the optimal grinding disc speed can be found in a short time during production to ensure stable operation of the mill.

(2) Efficient grinding-reasonable roller grinding curve

The earthy loose form of kaolin contains a large amount of gas inside. In order to grind under high pressure, the material layer needs to be exhausted and compacted before entering the grinding area to avoid serious fluidization of the material layer, causing grinding roller slippage and mill vibration. An undesirable automatic trip stop affects the operation of the mill. After research, the kaolin vertical mill adopts a tire-shaped grinding roller and a bowl-shaped grinding disc. The arc surface of the tire-shaped grinding roller is a steep curve from the outside (the center side of the grinding disc) to the inside (the edge side of the grinding disc). The design uses the centrifugal force of the material and the unilateral weight of the grinding roller to compact the material layer. At the same time, a height-adjustable retaining ring is used to assist in regulating the migration speed of the material on the grinding disc so that it can be effectively ground.

(3) Fine powder selection - high-efficiency dynamic and static powder separator

Today's vertical mill powder selection devices have three basic forms: static powder selector, dynamic powder selector, dynamic and static combination and high-efficiency multi-rotor powder selector. When grinding materials with low fineness (relatively coarse and without special particle size distribution requirements), a static separator can be used; when grinding cement raw materials, raw coal, clinker, non-metallic minerals (pyrophyllite, bentonite, desulfurized lime, Stone powder, gypsum powder, etc.), dynamic and dynamic and static combination powder separators are widely used: in some non-metallic mineral industries with higher fineness requirements, such as heavy calcium, high-efficiency multi-rotor powder separators are mostly used. Meet the powder selection requirements of 800~1250 mesh, or even finer.

Based on the HLM vertical mill technology and relying on design improvements and innovations in key aspects such as stable material layer, efficient grinding, and fine powder selection, the developed HLMX kaolin vertical mill can replace coarse powder equipment such as Raymond mills. , large-scale processing of kaolin fine powder products.Obviously, the vertical mill has the advantages of high output, low power consumption and low wear, negative pressure production, environmental protection and dust-free, high degree of automation and less labor, simple process and small footprint, etc., which can bring better economic and environmental benefits to kaolin enterprises. If you have relevant needs, please contact us for details of the equipment. Email address:mkt@hcmilling.com