What are the reasons for the decline in ball mill output?
The beneficiation stage is mainly divided into three stages: pre-selection, separation and post-selection. Grinding is in the pre-selection stage. Therefore, the output of the ball mill has a certain degree of influence on the mineral separation effect, and even the recovery rate and concentrate grade. Therefore, how to ensure the output of the ball mill has become a topic of concern, so what are the reasons that affect the output of the ball mill?
- Unreasonable design of ball mill
The ball mill can be divided into single compartment and double compartment. The length ratio of each compartment is different. In the case of single compartment, the length ratio of one compartment should be 30%-40%, and the length ratio of two compartments should be 60%~ 70%; In the case of double compartments, the length ratio of warehouse 1 and warehouse 2 is 25%~30%, and the length ratio of warehouse 3 is 45%~50% (the design ratio of each manufacturer’s product may be different, the above data is only for refer to.)
If the design of the length ratio is unreasonable, it is very likely that the ratio of coarse and fine grinding of the ball mill will be unbalanced, which will cause the product to appear too thick or too fine, which will affect the output of the ball mill.
- Poor ventilation of ball mill
Under normal operation of the ball mill, due to repeated impact and friction of the medium in the cylinder, the temperature in the mill continues to rise, causing water vapor to be generated from the water-bearing material. If the ventilation effect of the ball mill is not good, the water vapor cannot be discharged in time, and the water vapor will adhere to the ball mill liner and steel balls, causing the ball or grinding phenomenon.
Solution: Control the ventilation of the ball mill, and the ball mill has a good passing effect, which can not only bring out qualified fine materials in time, but also effectively reduce the phenomenon of over-crushing and reduce the temperature of the ball mill.
- Unreasonable feeding of ball mill
During the operation of the ball mill, uniform feeding is a necessary condition to ensure the normal operation of the ball mill. If the feed is too little, the impact of the steel balls of the ball mill will increase, resulting in media waste; if the feed is too much, the grinding capacity of the ball mill will be insufficient, leading to saturation.
Solution: Need to strictly follow the feeding standard for feeding.