The ball mill is an ore milling processing machine specially designed for the grinding of ore. The ball mill can be used for the grinding of many different ores. It plays a very important role in the ore milling production line. We are professional. The manufacturer of ore milling processing machinery and equipment reminds the users to pay attention to the "bloat" problem that may occur during the use of the ball mill. What are the hazards of the ball mill?
For ball mills under steady working conditions, the amount of material entering the mill should be equal to that discharged from the mill. For some reason (such as the amount of sand returning, the amount of raw ore is increased, etc.), the amount of material fed into the grinding machine becomes larger, which exceeds the allowable grinding processing capacity of the grinding machine itself, and is gradually eliminated in the grinding machine. Accumulation, so that the mill loses the grinding effect, this phenomenon is called the "swelling belly" of the grinding machine.
Everyone should pay attention to the seriousness of the "flatness" of the ball mill. There are two main aspects. First, the "swelling belly" not only causes the grinding to lose the grinding effect on the ore, but also reduces the grinding ability and destroys the stability of the grinding. Work, and the treatment of "swelling belly" will also cause fluctuations in the quality and fineness of the ore to the subsequent operation (selection), which affects the normal operation of the sorting operation.
In addition, if the ball mill has such a problem during the grinding of the ore, a serious "bloat" will cause damage to the mill. For example, when the overflow type grinding machine is inflated, large ore and steel balls will be spit out from the inlet and the discharge port, which is called “pre-spit and pull-back”. The lattice ball mill has a large amount of slurry with nuggets and steel balls poured out from the feed port.
Especially in closed-circuit grinding, the two kinds of grinding machines will cause a large number of steel balls and ore blocks to enter the returning sandbox, resulting in strong impact of large ore and steel balls with the spoon-type feeder, damage to the ore and returning sandbox. The spoon head is detached or the screw connecting the miner and the hollow shaft is deformed or sheared, which destroys the concentricity of the ore feeder and the hollow shaft. When it is serious, the ball mill vibrates or beats, and the bearing and the gear are damaged by the impact load. Therefore, in the operation of the grinding machine, it is necessary to enhance the sense of responsibility and prevent the "bloating belly" from happening.
Ceramic ball mill is a kind of commonly used grinding equipment for ore grinding. Ceramic ball mill can be used for grinding various kinds of ore. It is important for the grinding of limestone, calcite, dolomite and other different ores. As a professional processing equipment for ore grinding and processing machinery, we remind the users to pay attention to the reasons why the ceramic ball mill is geared in the process of grinding ore.
If the maintenance plan of the ceramic ball mill is unreasonable, it will cause the ball mill to have the problem of gearing of the reducer. After the ceramic ball mill reducer is toothed, in order to quickly resume production, which shaft is usually replaced with which shaft and gear, It is impossible to run in order to ensure that the new and old gears mesh well. The impact phenomenon occurs during operation, which makes the gear easier to break.
If the ceramic ball mill has poor gear processing quality. The root of the high stress concentration is rough, not a smooth transition, which aggravates the stress concentration effect; the material processing is poor, the grain flow line cannot be distributed along the tooth profile, and good comprehensive mechanical properties cannot be obtained; the gear is cantilevered and the root is equivalent At the fulcrum of the cantilever beam, the bending stress on the root portion is too large, which will cause cracks to occur at the root.
The reason why the ceramic ball mill reducer is toothed is also that the ceramic ball mill gear parameter mapping is not accurate. According to the analysis of the assembly results, when the mapping gear is modified, the helix angle and the modulus are inaccurate, resulting in a large difference between the gear tooth profile and the old tooth. When the meshing is small, the impact is small, the impact is large, the stress at a certain point of the gear is too high, and the gear teeth are easily broken.