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The reason why the output of ball mill can not meet the design requirement is analyzed

Date:2019-10-28 10:16     writer:cement editor     Views:

In the production of the ball mill, the output can not meet the design requirements is a common problem, in order to facilitate everyone efficient production, analysis of the ball mill output can not meet the design requirements.
 

1. Unreasonable proportion of length of each warehouse


The unreasonable proportion will cause the imbalance of coarse grinding and fine grinding ability, and the product will be too fine or too fine, which will affect the output of ball mill.


ball mill
 

2. The grain size of the grinding material is large


If the particle size of the material is large, the impact and grinding effect of the grinding body is difficult to adapt, the first bin of the ball mill is forced to load more steel balls, in order to enhance the impact of grinding material ability.A warehouse bears the role of crushing, resulting in unreasonable crushing process.The function utilization rate of the crusher is high, increasing the crushing of the grinding head, reducing the grain size of the grinding, which can not only reduce the energy consumption, but also increase the output.
 

3. Poor ventilation in the mill


Enhanced ventilation can timely discharge the micro powder in the mill, reduce the phenomenon of over-grinding, so as to improve the grinding efficiency.

Strengthen the ventilation, can eliminate the steam in the mill in time, reduce the adhesion of fine powder, prevent the paste ball and grate plug, ensure the normal operation of the ball mill.


ball mill
 

4. Water content of grinding material is too large


When the material water content is large, the abrasive body and lining plate will be adhesion, forming a "cushion", at the same time will block the grate plate, causing "full wear".However, the lower the water content, the better, and should be kept within a certain range.
 

5. Unreasonable gradation of grinding body


In order to meet the requirements of impact and grinding of materials with different particle size, increase the impact and grinding opportunity of the grinding body on materials, and improve the grinding efficiency, the grinding body must be graded reasonably.Its range is in 25%~35% commonly, with 28%~32% majority.

When the material is easy to wear poor, or grinding requirements of fineness is fine, a warehouse filling rate should be lower, not higher than 28% is appropriate.Production of low grade cement, a bin filling rate should be higher, and vice versa.When producing volcanic ash cement, the filling rate of one silo should be higher, and that of one silo should be lower when producing slag cement.The filling rate of section bin should not be too high.

 

6. Influence of temperature of grinding materials


The high temperature results in the decrease of grinding efficiency.In order to reduce the cement temperature in the ball mill, a small amount of mist water can be sprayed into the silo.


ball mill
 

7. Influence of the frangibility of materials


The grainability of materials refers to the degree of difficulty for materials to be grinded. The smaller the value, the better the material is grinded, and vice versa.Cement factory used to use the relative coefficient of grinding, to express the degree of difficulty of grinding materials.
 

8. Influence of grinding AIDS


We can add grinding aid to the ball mill without damaging the product performance.Most commonly used grinding AIDS are organic materials with strong surface activity. In the process of material grinding, they can adsorb on the surface of materials, accelerate the crack propagation in material grinding, reduce the mutual bond between fine powders, improve grinding efficiency, and contribute to energy saving and high yield of ball mill.According to the national standard, grinding AIDS are allowed to be added in the process of cement production, but the content shall not exceed 1%.
 

9. Influence of grinding process


The same size ball mill, closed flow than open flow 15 ~ 20% higher output;In the closed circuit operation, the selection of appropriate powder selection efficiency and cycle load rate is an important factor to improve the output of the mill.
 

10. Fineness requirements of grinding materials


The finer the fineness of the grinding material, the lower the output, on the contrary, the higher the output.

Is your current ball mill equipment up to design capacity?If not, look for answers from the above reasons.

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