As we all know there are mainly two grinding mills were usually be used in cement industry, ball mill and vertical vertical roller. Cement vertical roller mill is mainly used in cement clinker grinding; and in recent years, with the development of economy and new technology, cement vertical roller mill had get used into more widely industry areas. For example, mining, chemical, stone powder paper making and so on.
Vertical roller mill use a vertical structure, so it’s more cost saving on cover area; and compare with common ball mill, the vertical roller mill has higher grinding efficiency; high drying capacity; large and medium size vertical mill can save secondary crushing; stable chemical composition of products; homogeneous particle size distribution, homogeneous product size, simple process; low noise, less dust, clean operating environment; low metal loss, high utilization rate; and economics. The vertical roller mill has such many advantages.
However, when we use cement vertical roller mill in daily processing, we usually will meet some problems, how to solve these problems? Clirik will share some tips with you.
During the use of cement vertical roller mill, due to the bad working conditions, common problems such as wear of vertical mill roll, lining plate of grinding disc, wear of bearing chamber of vertical mill roll and leakage of reducer often occur. In the process of using vertical grinding roller body and wear-resistant liner, once the fit clearance occurs, the wear between the body and liner will be aggravated. In addition, the continuous erosion of hot air and cement particles on the mating surface will lead to the generation of grooves, resulting in impact collision between the body and liner, and in serious cases, the liner will crack or even break. Crack, machine damage, especially the damage of reducer, cause malignant events. Once this kind of problem occurs, the general repair method is difficult to solve, and the replacement cost is high. The assembly requirements of vertical grinding roller bearings are more stringent. Enterprises generally adopt the method of cooling the bearings in dry ice to assemble. Once the clearance between the bearing and the bearing chamber occurs, it will affect the normal operation of the bearing, leading to the heating of the bearing, which will lead to the burning of the bearing in serious cases. The leakage of the vertical roller mill reducer not only affects the appearance of the machine, but also wastes oil, causing great trouble to the maintenance of the equipment.
Once the above problems occur om your vertical roller mill, it is generally difficult to repair and solve them by the repair welding process. The weld ability of cast iron is not good and it is easy to cause more serious secondary damage to the parts during welding, and the replacement cost is high and the time is long. At present, polymer composites are mostly used in western countries to solve these problems. By using materials with compressive strength, good plastic deformation and super machine ability, this kind of problems can be repaired quickly, conveniently and durably, which saves a lot of valuable shutdown time for enterprises, and enables enterprises to learn a new set of maintenance technology. When they encounter similar problems again, enterprises should pay attention to the following aspects: Industry can be solved independently at the first time.