What are the wearing parts of Raymond mill?
The stress of Raymond mill parts and the extrusion load of grinding are easy to cause cracks in the martensite structure. When the eutectic carbides precipitate along the grain boundaries into a network, their brittleness will promote crack propagation and the existence of retained austenite. The extension of the crack is prevented very well. Therefore, in our production, we must do a good job of daily maintenance for the use of Raymond mill. Let us introduce in detail how to reduce the wear rate of Raymond mill rollers.
The wearing parts of Raymond mill are grinding roller, grinding rings, and assemblies. The grinding sticks must be replaced after the Raymond mill has been used for hundreds of hours. Many users know this, but many of the problems that arise during the use of mills cannot be solved. Raymond grinding rollers and disc liners are generally made of high-chromium cast iron or nickel-chromium alloy, but this material often breaks, causing serious losses, especially the loss of production shutdown, which is impossible to estimate.
This should be analyzed, the influence of the hardness and fracture of the Raymond mill material, the influence of the heat treatment and fracture of the parts after the raw material is processed, and the influence of the friction and fracture of the parts. Based on the company's years of experience in the production of Raymond mills, the following solutions are made for the above situations. The wear resistance of Raymond mill parts is our goal. Everyone knows that the harder the product, the more wear-resistant it is. Therefore, it seems very simple to make more wear-resistant grinding rollers and grinding discs, because you only need to try to improve its hardness. Therefore, many foundries advertise that their accessories have a chromium content of 30% and an HRC hardness of 63-65, but this is not the case.
The higher the hardness, the more carbides (Cr7C3) contained in the accessories are required, the more dispersed the distribution, the greater the probability of forming micro-holes and micro-cracks at the interface between the matrix and the carbide, and the greater the probability of fracture. . And the harder the object, the harder it is to cut. Therefore, casting a product that is both wear-resistant and not easy to break is not as simple as imagined.
Three protective measures to reduce the wear of Raymond mill bearings
1. Fatigue damage is a common damage method for bearings. The common causes of fatigue damage may be: long-term overload operation of the bearing; failure to repair in time; improper maintenance; equipment aging. Therefore, selecting the appropriate bearing type and replacing tired bearings on time is an important measure to prevent bearing fatigue damage.
2. In the early stage of the installation of Raymond mill equipment, since many original parts are new products, some problems will inevitably be encountered during the installation process. For the old installation workers, they can solve it smoothly through experience, but it is hard to say for novices. Bearings The installation is the same. When using a hammer, novices will not use clever force, but directly hit the bearing with brute force, which will cause the bearing to deform. In some cases, the bearing is not installed properly, causing the bearing clearance to be too small and the inner and outer rings. It is not in the center of uniform rotation, which is also an important cause of damage to Raymond mill bearings.
3. In the process of use, if there is no lubricant or lubricating oil added for a long time, or although the lubrication is regular, the number of the added lubricant or lubricating oil is wrong, and the incorrect filling will damage the machine, so you must choose Accurate lubricant or lubricating oil, and refuel in strict accordance with the filling method specified by the Raymond mill manufacturer.
Who we are?
Shanghai CLIRIK Machinery Co.,Ltd. has been committed to the field of ultra-fine powder grinding machines for 20 years.
CLIRIK has a first-class manufacturing base with standardized and intelligent production lines.
CLIRIK's professional R&D, sales, installation and after-sales teams have provided door-to-door services to more than 100 countries and regions.
Which models can be selected for processing ultra-fine powder?
HGM grinding mill: 74-5 micron(200-2500 mesh); D97=5 micron
YGM Raymond mill: 613-33 micron(30-325 mesh); D90=30 micron
CLUM vertical roller mill: 20-5 micron(600-3000 mesh); D50=2 micron D97=4 micron
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