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 the vertical mill is very bad, which belongs to the working condition 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 overall effect will inevitably be ungrounded and even irrelevant without specific minerals. We

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 roller coaster. At the beginning of 2017, the price dropped from about 3000

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 a power of 20MW. It is a gearless semi autogenous mill. This paper

        The purpose of lubrication management is to prevent equipment lubrication failure, reduce the loss caused by equipment overheating shutdown, save maintenance costs and reduce the replacement of parts, prolong the service life of equipment, reduce lubricant consumption and save the cost of purchasing lubricating materials. Modern mechanical equipment is developing towards the direction of high precision, high efficiency, high speed, heavy load, small, maintenance free and energy saving, which puts forward higher requirements for the friction parts of mechanical equipment.1. Fault phenomena and causes caused by lubrication1. Poor mechanical operationWhen the equipment is running, the motion

Grinding machine is widely used in the grinding and processing of mineral products and materials in the fields of metallurgy, building materials, chemical industry, mining and so on. According to the fineness of the milled materials and the fineness of the discharged materials, the mills can be divided into many types, such as Raymond mill, ultra-fine mill, etc. The production efficiency of pulverizer directly affects the profits of manufacturers. We must pay more attention to the factors affecting the production efficiency of pulverizer in production. Today, Xiaobian will discuss with you what factors affect the production efficiency of the pulverizer.

Nickel ore refers to the ore containing nickel element or nickel compound, which can be beneficiated into nickel concentrate or nickel ore sand with high nickel grade. Nickel concentrate can become refined nickel and nickel products only after smelting Commission. The content of nickel ore in the earth’s crust is 0.018%. The main minerals of nickel ore include nickel pyrite [(Ni, Fe) 9s8], silicon magnesium nickel ore [(Ni, Mg) SiO3 · nH2O], needle nickel ore or yellow nickel ore (NIS), red nickel ore (Nias), etc. Nickel is a silvery white metal, melting point 1455 ℃, boiling point 2730 ℃, density