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Research Meaning of Ultra Critical Rotational Speed Ball Mill

AUTHOR: admin       DATE: 05 Apr 2012 09:59:39

With the fast development of the powder grinding industry, the research and development work of new type powder grinding equipment is also becoming more and more important and developing large-sized, energy saving, fine and super fine grinding machines is the development tendency of the mill machinery. At present, the total level of the ball grinder manufacturing and comprehensive performance of the equipment in our country still have a big gap compared with the advanced level in foreign countries. The main problems existing in the manufacturing of large-sized ball grinder in our country are the manufacturing level and the quality of the driving system such as coupling rack wheel and main bearing are not very high. As for the driving methods of the ball grinder, the start of the large sized ball grinding devices, the change devices of the lining plate, automatic control and the application of high-abrasive material still have gaps compared with the advanced ones. For this reason, at same time of keeping the existing size of the grinding machine, researching mills that has low energy consumption and high efficiency and that is able to conform to various kinds of grinding requirement is conformed to the industrial development demand in our country.

The kind of ultracritical rotation speed ball mill is a new ore grinding machine that is based on the super gravity theory and its grinding theory is complete different from the traditional mills. Its main characteristics are working on the condition that the rotation speed is higher than the ultracritical speed and its orient structure changes the movement locus of the ores and grinding media which makes the ores and grinding media move according to the designed parabolic path. In the milling process, the guide mechanism suffers from severe impact of the ores and grinding media and its deformation and stress strain condition is difficult to be directly tested and analyzed because the barrel of the ball mill is sealed outside. One the guide mechanism is damaged, the ore grinding process at the ultracritical rotation speed will not exist. For this reason, it is necessary to analyze the deformation and stress strain condition in the crushing process and use the ANSYS software to analyze it at different rotation speed and fide the weak part and provide theoretical basis for the industrial design of the ultracritical rotation speed ball mill. The production capacity of this machine is significantly improved compared with the common ball mill, but its crushing media movement is completely different from that of the common mills. For this reason, analyzing the crushing media and ores movement rules of this mills and preliminarily explore a new kind of Grinding kinematic theory which can be used for guiding its industrial design and manufacturing. As a leading global manufacturer of crushing and milling equipment, we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete stone crushing station. We also supply individual sand maker as well as spare parts of them.

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