How to extend the life of vertical mill equipment
In cement production, vertical mill is a key equipment, and the operating status of its roller bearing is crucial to production safety and efficiency.
How to make the vertical mill roller last longer
1. Choose the right lubricant and replace it regularly
The choice of lubricant is crucial. You should choose high-quality lubricants suitable for high temperature and high pressure environments. At the same time, the lubricant needs to be replaced regularly to ensure its stability and cleanliness during use and avoid bearing damage caused by oil quality problems.
2. Strengthen daily maintenance, early detection and early treatment
Operators should regularly check the operating status of the lubrication system, especially in high temperature environments, and pay attention to changes in oil temperature. If the oil temperature is abnormal, the machine should be stopped immediately for inspection and continue to operate after troubleshooting. The wear of the bearings should also be checked regularly, and the problematic parts should be replaced in time to avoid further damage.
3. Regularly check and replace oil seals
Although the oil seal is small, it has a huge effect. The wear of the oil seal should be checked regularly, and the failed oil seal should be replaced in time to ensure that the lubricant does not leak and prevent external impurities from entering the bearing. This simple measure can greatly extend the service life of the bearing.
In addition to bearing problems, the wear resistance of the grinding roller and grinding disc liner is also an important factor affecting the life of the vertical mill. Different materials and manufacturing processes determine the wear resistance of the grinding roller and grinding disc.
1. Traditional casting: low cost, high risk
Traditional casting processes mainly use high manganese steel and high chromium cast iron as materials. The advantages of these materials are low cost, simple process, and suitable for large-scale production.
However, they also have obvious disadvantages. Although high manganese steel has good toughness, its wear resistance is relatively low. The wear resistance of high chromium cast iron has been improved, but its brittleness problem is still prominent, and it is easy to crack during use, which makes it impossible to repair and can only be used once.
2. Micro casting (surface cladding): cost-effective choice
Micro casting, also known as surface cladding technology, is currently the most widely used anti-wear solution. This process is to improve the wear resistance of grinding rollers and grinding discs by cladding a wear-resistant layer on an ordinary cast steel substrate.
3. Ceramic alloy composite casting: the future wear-resistant star
Ceramic alloy composite casting is an emerging wear-resistant technology that embeds ceramic particles into the surface of the cast iron matrix, significantly improving the wear resistance of the grinding roller and grinding disc. This material has extremely high wear resistance and toughness, and is particularly suitable for use under harsh working conditions.
However, the process of ceramic alloy composite casting is complex, the manufacturing cost is high, and there is also the problem of irreparability. It is more suitable for special working conditions with extremely high requirements for wear resistance, rather than ordinary cement production environments.
4. How to choose the most suitable solution?
When selecting the materials for grinding rollers and grinding disc liners, hardness, toughness, cost and repairability should be considered comprehensively according to specific working conditions.
Traditional casting is suitable for those occasions with high cost control requirements and relatively simple working conditions;
Micro casting is suitable for most cement plants. It can provide better wear resistance while reducing maintenance costs;
Ceramic alloy composite casting is suitable for some special working conditions. Although the cost is high, its extremely high wear resistance is worth paying attention to.