Solutions to Common Problems in the Use of Ball Mills

时间:2021-04-06 作者 :超级管理员

In the use of ball mills and other beneficiation equipment, there are always a lot of problems. Hongke uses its own advantages in the production of ball mills and the research and development of beneficiation equipment to collect a large amount of customer information and customer questions. And give corresponding technical answers to these questions.

1. How to determine the speed of the ball mill.

        When other conditions remain unchanged, the motion state of the grinding medium in the cylinder depends on the speed of the ball mill. The motion state of the medium is different, and the grinding effect is also different. 1. When the speed of the ball mill is low, the medium is mainly falling motion, and the impact effect is small. The grinding effect is mainly grinding, and the production capacity of the ball mill is low, which is suitable for fine grinding; 2. When the speed of the ball mill is high, the medium is thrown. The proportion of the falling motion method is increased, and the impact effect is stronger. The grinding effect is mainly impact, and the grinding and stripping is the second, which is beneficial to crushing coarse-grained materials. The ball mill has a high production capacity. The filling rate of the ball mill is different, and the speed required when the useful power reaches a larger value is also different. The higher the filling rate, in order to ensure that the inner ball can also be in the falling motion, the higher the speed of the ball mill is required to make the useful power reach a greater value, and the ball mill has a greater productivity.

    2. How to judge the swelling of the ball mill.

       1. The current meter of the main motor of the ball mill indicates that the current is continuously decreasing; 2. The overflow of the classifier begins to "rough", the amount of returned sand is gradually increasing, the overflow concentration increases, and the particle size becomes coarse; 3. There is a slurry direction at the ball mill feeding end Outer spray: 4. The running sound of the ball mill is dull, the noise becomes smaller, and the impact and falling sound of the steel balls are almost inaudible; 5. The flotation foam has obvious changes, the flotation agent is out of balance, and the mineralization phenomenon is weakened.

    If such a problem occurs, it is necessary to consider whether it is the bulging of the ball mill that has affected the progress of the work.

3. The ratio of steel balls in the ball mill.

      Different ball mill models have different total ball sizes. For example, MQG1500×3000 ball mill (processing capacity 100-150 tons) has a larger ball capacity of 9.5-10 tons. In the first row, large balls (Ø120㎜ and Ø100㎜) accounted for 30%-40%, medium balls (80㎜) accounted for 40%-30%, and small balls (Ø60 and Ø40㎜) accounted for 30%. Why is the amount of steel balls only added 80% during the running-in process of the ball mill, because after the ball mill is installed, the large and small teeth of the ball mill need to be meshed, and the processing capacity (ore volume) must be gradually increased. After the ball mill runs normally for two or three days, stop the ball mill to pick up Check the meshing of the large and small gears, and when everything is normal, open the manhole cover of the ball mill and add the remaining 20% steel balls for the second time.