Introduce Some Small Knowledge of Powder Separator Machine

Brief :

The powder selection mill part is indispensable to introduce, and share the knowledge about the mill with friends: 1. There must be an induced draft fan for ventilation in the mill, and the wind speed in the mill is required to reach 0.8~1.2m/s; 2. A flap valve must be installed at the discharge port of the mill tail to lock the wind, and at the same time, the sealing of the connection between the induced draft duct at the mill tail (including the garbage port and maintenance door) and the fan should be ensured.

Content :

The powder selector mill part is indispensable for introduction, and I would like to share the knowledge about the mill with my friends:

1. There must be an induced draft fan for ventilation in the mill, and the wind speed in the mill is required to reach 0.8~1.2m/s;
2. A flap valve must be installed at the mill tail discharge port to lock the wind, and the sealing of the connection between the induced draft duct at the mill tail (including the garbage port and the inspection door) and the fan should be ensured, otherwise it will affect the mill ventilation effect and mill output;
3. The mill feed should be as uniform as possible;
4. When the mill’s partition plate, grate plate, etc. are changed from an open circuit mill to a closed circuit mill, appropriate adjustments should be made to the rotary dryer so as to adjust the wind speed and material flow rate in the mill to correspond to the closed circuit mill;
5. The loading capacity of the mill grinding body can also be appropriately increased as the open circuit is changed to a closed circuit, which is conducive to increasing the output;
6. For the return material conveying equipment, considering that there are coarse particles in the return material, it is recommended not to use a screw conveyor.

The powder selector is very important to our production, and it is such an important manufacturer.

The current status of powder selectors in my country After the continuous development of centrifugal and cyclone types, the rotor type powder selector was launched in the mid-1990s. It effectively controls the fineness and particle size distribution of the finished product and better meets the production needs. However, with the implementation of the new cement standard, new challenges have been posed to the rotor type powder selector: the early strength of cement does not meet the requirements, and it is impossible to work hard on controlling the fineness of the finished product. The fineness control of the rotor type powder selector is mainly through the two methods of spindle speed and circulating air volume, which greatly increases the circulation load of the system, greatly reduces the powder selection efficiency, and a large amount of return powder enters the first chamber of the mill, resulting in a decrease in the mill grinding efficiency and a significant increase in the system unit output grinding power consumption. The third generation of powder selectors represented by the O-Sepa powder selector adopts the plane eddy current powder selection theory, with small size and large processing capacity. It is widely used in some new dry production lines, but because it does not have a fine powder collection device, it needs to match a large-scale bag dust collector, which increases the investment and system installed capacity, and increases the difficulty of operation and management. It is not suitable for small and medium-sized cement plants.

The rotor type powder selector is economical and practical, but the classification accuracy is not high, and the adaptability to the new cement standard is poor. The O-Sepa powder selector has a large investment and high operating cost, and is not suitable for small and medium-sized cement plants. Is there a new type of high-efficiency powder classifier that can replace the rotor type powder classifier, suitable for the technology and equipment level of small and medium-sized cement enterprises, with low investment, high powder selection efficiency, low price, convenient maintenance and management, and a new type of high-efficiency powder classifier that adapts to the cement ring flow production after the new cement standard? This is the design idea of ​​the initial development of the O-X vortex powder classifier.

The O-X vortex powder classifier is a new generation of energy-saving and high-efficiency powder classifier launched by Nanjing Xuanli Group and Nanjing Liyao Cement Technology Research Institute based on the development trends of powder classifiers at home and abroad and the actual situation of small and medium-sized cement enterprises in my country. It is an upgraded product of the rotor type powder classifier. On the basis of the rotor type powder classifier, the O-X vortex powder classifier further absorbs the suspension dispersion technology and plane eddy current technology of the O-Sepa powder classifier, and makes major improvements to the structure of the rotor type powder classifier. It has better “dispersion”, “classification” and “collection” performance, higher powder selection efficiency and more stable performance. It is an upgraded product of the rotor type powder classifier.