Sealing plays an important role in preventing “three leaks” of mechanical products and ensuring the normal lubrication action and safe operation of equipment. The vertical mill has high requirements for sealing, especially for the grinding roller bearing. The oil seal is set between stationary and rotating parts to prevent lubricating oil leakage and prevent impurities such as external dust and materials from entering the inner cavity of the bearing chamber. It has the characteristics of simple structure, good sealing performance, shaft swing and eccentric follow-up performance. Therefore,

1 existing problems Oil leakage of grinding roller often occurs in cement plants with vertical mill, which is a difficult problem that always puzzles vertical mill manufacturers. Oil leakage not only pollutes the environment, but also increases the production cost. There are many causes for oil leakage of vertical grinding roller, which can be summarized as follows: First, the reason of grinding roller sealing. At present, the vertical grinding roller seal mainly adopts three skeleton lip seals, one dust-proof and two oil-proof. However, the working environment of

In recent 10 years, the average annual growth rate of China’s resource tax revenue is about 27%. In 2015, the resource tax revenue was 103.5 billion yuan, accounting for about 1.8% of the local tax revenue, becoming an important tax source in resource rich areas. text Since July 1, 2016, China has fully implemented the ad valorem reform of resource tax. The implementation time of this reform is short, and the impact on various mineral processing industries also needs to be treated differently. We believe that the

Industrial alumina is the raw material for the production of many kinds of alumina. In this industrial system, industrial alumina is a river, and many kinds of alumina are tributaries. The price fluctuation of industrial alumina has a direct impact on the production cost of multi variety alumina enterprises, but it will generally lag by 1-2 months. Recent price fluctuation of industrial alumina From the market in the first half of the year, industrial alumina has been affected by multiple factors, with ups and downs like a

1.2 selection of grinding machine low-grade ore poses a dilemma for cartier mountain mine. In order to achieve economically satisfactory operation, large-scale production is required. The rainwater is stored in the dam and enclosure + EI. In addition, the concentrator uses the grinding rainwater 9 and water for the concentrator according to the largest grinding machine designed and operated at that time. Dam 1 cofferdam stores the water I!. In addition, the mill is manufactured by SVEDALA Industrial Company, with a diameter of 12.2m (40 feet) and