Subcritical rotating speed ball grinding mill

Abstract

A subcritical speed ball mill, which includes a mill body, a motor, and a reduction box. The subcritical speed of the mill body is set between the actual working speed / design speed and the critical speed of the mill. The subcritical speed is obtained by adjusting the deceleration The speed ratio of the box is realized. It has a simple structure, is easy to transform, and has low cost. The new construction is almost the same as the original investment. It is safe and reliable to use. It is suitable for metallurgy, chemical industry, ceramics, power generation, building materials and other industries. It has a wide range of applications and can increase output by 10~ 15%.

Description

technical field [0001] The invention relates to a ball mill, in particular to a subcritical speed ball mill. Background technique [0002] At present, there are many ways to increase the output of the mill table, such as changing the shape of the lining board, moving the position of the compartment board, increasing the loading capacity of the grinding body, adjusting the ratio of the grinding body, strengthening the ventilation in the mill, and reducing the particle size of the grinding material. Both can increase some output of the mill, but none of them involve the key issue of the mill speed. The ball mills currently in use and even newly produced still use the same technology that has been inherited for more than 200 years. N = 32.2 ÷ D This rotational speed formula, namely the so-called "theoretical suitable rotational speed of the mill carcass", although someone has propo...

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Problems solved by technology

[0002] At present, there are many ways to increase the output of the mill table, such as changing the shape of the lining board, moving the position of the compartment board, increasing the loading capacity of the grinding body, adjusting the ratio of the grinding body, strengthening the ventilation in the mill, and reducing the particle size of the grinding material. Both can increase some output of the mill, but none of them involve the key issue of the mill speed. The ball mills currently in use and even newly produced still use the same technology that has been inherited for more than 200 years. N = 32.2 ÷ D This rotational speed formula, namely the so-called "theoretical suitable rotational speed of the mill carcass", although someone has proposed the method of "supercritical" rotational speed, which involves the key issue of increasing the rotational speed, but it is necessary to add a device to prevent the grinding body from rotating with the grinding body. Its complex and cumbersome structure and difficult installation seriously restrict the popularization and application of "supercritical" speed mills.

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