Grading method of coal mill steel balls and application thereof

A coal mill and steel ball technology, applied in grain processing and other directions, can solve the problems of single installed gradation of grinding balls, affecting the normal development of enterprises, and increasing the labor intensity of workers, so as to improve grinding efficiency, increase specifications, and reduce operating power. Effect

Inactive Publication Date: 2015-03-25
QINGDAO CHUTIAN ENERGY SAVING TECH
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Problems solved by technology

[0004] After investigation, most of the power plants in China adopt the traditional φ40-φ60 gradation ratio for installed balls. Because of the single gradation of the installed grinding balls in the process, the grinding efficiency is low, which gr

Method used

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  • Grading method of coal mill steel balls and application thereof
  • Grading method of coal mill steel balls and application thereof
  • Grading method of coal mill steel balls and application thereof

Examples

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Example Embodiment

[0075] The steel ball grading method for a coal mill of the present invention will be further described below through five specific examples. The same coal mill is selected for testing. The output of the ball mill remains unchanged before and after the test. The changes in the indicators are shown in the following table:

[0076] Table 1 The weight ratio of steel balls in each embodiment

[0077]

[0078] Table II

[0079]

[0080]

[0081]It can be seen from the comparison results of the five examples in Table 2 before and after the test that after using the grading method of the present invention, the current of the coal mill is significantly reduced, and the pulverized coal is finer.

[0082] Production practice has proved that after the steel ball grading method of the coal mill of the present invention is used, the operation of the ball mill is stable and reliable, and the natural grading is more reasonable due to the increase in the specification of the gradati...

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Abstract

The invention discloses a grading method of coal mill steel balls. The method comprises the step of filling steel balls with different sphere diameters in a ball mill according to the following weight ratios: 5-10% of steel balls with sphere diameters of 80mm, 10-15% of steel balls with sphere diameters of 70mm, 8-10% of steel balls with sphere diameters of 60mm; 10-15% of steel balls with sphere diameters of 50mm, 10-18% of steel balls with sphere diameters of 40mm, 12-18% of steel balls with sphere diameters of 30mm, 15-30% of steel balls with sphere diameters of 25mm, and 15-30% of steel balls with sphere diameters of 20mm. The grading method disclosed by the invention is used for reasonably grading the steel balls to reduce the energy consumption of a coal mill while ensuring the output of the coal mill, and meanwhile since the attrition of the steel balls is small, the production cost of the coal mill is reduced.

Description

technical field [0001] The invention relates to a method for grading coal mill steel balls and the application of the method to grinding coal powder for boilers. Background technique [0002] Coal mill steel ball is currently the largest wear-resistant material consumable in the world's crushing industry. It is an important basic component of coal mills, especially precision industrial steel balls play a huge role in the development of the national economy. It is widely used Used in mineral processing, cement plants, power plants, etc. [0003] At present, the steel ball coal mill has been widely used in thermal power generation units in my country. The steel ball coal mill has wide adaptability to coal types, safe and reliable operation, and convenient maintenance. However, its metal consumption is large, and the power consumption of pulverization is high. According to statistics, the steel ball mill generally wears 300-350g per 1 ton of coal milled, and some coal mills ar...

Claims

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Application Information

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IPC IPC(8): B02C17/10B02C17/20
CPCB02C17/10B02C17/20
Inventor 赵筱珉
Owner QINGDAO CHUTIAN ENERGY SAVING TECH
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