1. Ultra-fine vertical grinding structure features (1) Working principle of vertical mill Vertical mill is to crush the material by the relative movement of the grinding roller and the grinding disc. As the rolling roller pressure increases, the fineness of the material becomes smaller; The belt is graded by the grading device above it, and the coarse powder falls into the grinding disc to be pulverized again; the qualified fine powder is sent out by the wind to the bag dust collector for collection. (2) Structural characteristics of ultra-fine vertical mill 1 The grinding disc and the grinding roller are designed as curved curves. The material enters the coarse grinding zone coarse grinding first according to the grinding track, and then the ultra-fine grinding is performed by the fine grinding zone. 2The pressure of the grinding roller is as high as 10-15MPa. According to the material characteristics, the rotation speed of the grinding disc and the pressure of the grinding roller can be reasonably controlled. The grinding efficiency is high, and the content of 2-10μm in the discharge is high. 3 Unique inner ring design, the wind speed at the wind ring reaches 30 m/s or more, which ensures that the fine material after ultra-fine grinding enters the classifying device under the action of the airflow, and the coarse particles fall into the wind ring from the grinding machine. discharge. 4 Optimize the graded rotor from the perspectives of structural dimensions, materials, mechanical strength, and blade placement. A reasonable rotor gap sealing method is adopted to ensure the classification effect and classification accuracy. The graded rotor adopts the advanced and efficient dynamic-static combination method. The static blades play the role of coarse screening large particles, and the moving blades play the role of controlling the product d50, d97 and d100 grain size indexes to achieve the product super-segmentation level. 2. Application of ultra-fine vertical grinding in the processing of heavy calcium carbonate powder From the perspective of diversified demand for heavy calcium carbonate powder products, vertical mill + secondary (or tertiary) grading process is often used in the design of vertical milled powder engineering system. First, large-scale energy saving by vertical mill is adopted. Ultra-fine production; Second, the use of secondary grading is conducive to product refinement. Figure 7 is a process flow diagram of a company's heavy calcium carbonate powder. Figure 7 Process flow chart of a company's heavy calcium carbonate powder Direct production of d97=13-40μm heavy calcium carbonate by fine vertical grinding system, the output of single machine can reach 5-12 t/h, the energy saving effect is obvious; the secondary (or three) classification system is used to produce d97=5-13μm heavy Calcium carbonate, the single machine output reaches 1.8-6.0t / h, the ultra-fine pulverizing ability of the vertical mill can meet the requirements of the fine classifier. Table 1 Specifications of heavy calcium carbonate powder produced by ultra-fine vertical mill 3, application of ultra-fine talc powder processing vertical mill A company uses ultra-fine vertical grinding to produce talcum powder. The technical indicators of its talcum powder products are shown in Table 2. Table 2 Technical indicators of talcum powder produced by ultra-fine vertical mill 4 Conclusion "Thirteen Five" period, industrial production equipment and technology innovation and technology innovation focused on the development of non-metallic mineral powder industrial upgrading and restructuring. The ultra-fine vertical grinding equipment technology has the advantages of green energy saving, product stability and large-scale production. The successful application of ultra-fine vertical grinding in the processing of non-metallic mineral powders such as heavy calcium carbonate and talc helps to promote the upgrading of non-metallic mineral powder processing equipment technology in China and enhance the non-metallic mineral powder equipment technology in China. Competitive strength. Construction hoist is composed of car, driving mechanism, standard section, attached wall, chassis, fence, electrical system and other parts. It is a manned cargo construction machinery frequently used in buildings. Because of its unique box structure, it is comfortable and safe to ride. Construction elevator is usually used with Tower Crane on the construction site. The load capacity is 0.3-3.6 tons, and the running speed is 1-96M/min. Construction Hoist,Construction Elevator,Passenger Hoists,Hoisting Machinery Jinan Shanghangda Machinery Co., Ltd. , https://www.jinanshdmachine.com