Research on the new technology of non - metallic grinding materials and grinding
The newspaper news reporter Zhang Yunke Shandong reported recently, a new type of cement grinding materials and application technology developed by the University of Jinan Institute of materials -- Based on the new technology of cement mill grinding special non-metallic grinding body, in the landscape group Shandong Cement Factory Co. Ltd. joint grinding system has been successfully applied. The result is a revolutionary innovation of cement grinding material and grinding technology, has changed the status of metal abrasive materials on cement mill, cement grinding system can effectively reduce the power consumption, saving the cost of cement production, while reducing the chromium content in cement.
The result is one of the latest progress in scientific research in University of Jinan in cement manufacturing, by the vice president Professor Ye Zhengmao, associate professor of materials science and engineering University of Jinan led Hou Xianqin Zhu Hui et al. Scientific research team composed of engineers, success through research and development in recent two years.
As is known to all, cement ball mill is the key equipment for crushing cement clinker, gypsum, mixed material and so on. When the barrel rotates, the grinding body due to inertia and centrifugal force and frictional force, was taken to a certain height, and falling by gravity, the material in the barrel is crushed, so as to realize the cement grinding. The grinding body is generally steel ball or steel forging, and is in different diameter and certain proportion in each bin.
The research team according to the characteristics of cement mill. The mill grinding trajectory and energy changes, using the advanced algorithm, calculate the stress threshold of the grinding body, calculate the stress boundary conditions on the grinding body. One of the core technology is a new type of special non-metallic abrasive material, by changing the non metal grinding body material ratio, elements of regulation, molding preparation process modification technology to fabricate the new special non-metallic abrasive material is suitable for the condition of cement mill. Compared with the traditional metal abrasive materials, the advantages are small, about 1/2 of the steel ball; wear low, for the steel ball around the 1/3.
For this new type of non-metallic grinding body, the research team also combined with the internal structure and the movement of the ball mill, material, wind ", through the adjustment of the structure of adaptive design in the mill, and with roller press and powder selecting machine, making precise and reconstruction scheme and measures, implementation of cement grinding system to reduce power consumption and the purpose of saving the cost of production.
The advantages include: the non metal grinding body without chromium ions, reducing the chromium content in cement, steel or chromium than steel forging more green. At the same time because of the differences in the way of grinding work, improve the cement grinding phenomenon, the adjustment and optimization of cement particle size distribution in 3~32 m, improve the quality of cement hydration; non metal grinding body can reduce electrostatic adsorption, helps to improve the grinding efficiency; because the new special non metal grinding ball is a small proportion of loading the amount of greatly reducing the mill load, bearing temperature is reduced, which can protect the motor system, the repair rate and failure rate is greatly reduced.
At present, the research results have been declared a national invention patent. At the same time, the research team also targeted to carry out research and development related to different forms of grinding media and grinding components, and has completed the laboratory testing, industrial pilot.
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