Speaking before combing operation of cement grinding wind will fine particles to produce the powerful gasification and upward force. Material flows through the movement of the roller, the gap between the disc and the grinding roll with only a small amount of material, it is difficult to form a normal bed. Aiming at this problem, the have proposed different solutions for different.
LUM ultrafine vertical roller mill
LUM ultrafine will be the original four specifications of the grinding roller in two large and two small, arranged in an offset manner. Big roll (main roll) up grinding effect; small roll (auxiliary roll) for pure rolling design, function play almost turndown, to the main roller to better fulfill high grinding pressure, see Figure 2. These two kinds of methods were used to prearranged bed, and high pressure crushing method. The two very different method, but the effect of different approaches, but also satisfactory results. At the same time as the stability of the material bed may also take other measures, such as the ring disk hardware restraint adjustment, set reasonable external circulation etc. The powder
selecting vertical roller mill device used is not the same, but the basic principle is the same, by adjusting the ventilation of the mill, the rotor speed and at the same time adjusting to meet the requirements Product distribution of the particles. In real production can not only by the above method to adjust the size distribution of the product particles, but also by other measures to resolve the size distribution of the product particles: such as setting retaining material height adjustment of the ring roller mill, grinding pressure and other measures, until it reaches the requirements of the desired products.
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