As the main equipment for grinding, the industrial ball mill
has the ability to process and produce directly related to the benefits of the entire production line. Therefore, in order to increase its grinding efficiency, many people will increase the content of the steel ball medium in the ball mill
cylinder to a large extent. As everyone knows, improper operation will have the opposite effect, so you should not blindly feed.
Since the ball of the ball mill
is a wearing part, it needs to be replaced from time to time. In studying this problem of adding steel balls, we can analyze them from two aspects: steel ball filling rate and steel ball size.
1. Ball mill steel ball filling rate
The steel ball serves as the main task of the ball mill equipment
grinding action. The number of steel balls in the mill is naturally inseparable from the strength of the grinding action. From the analysis of physical phenomena, there are many balls, the number of hits is large, the grinding area is large, and the grinding effect is strong. Conversely, with less ball loading, the grinding effect naturally diminishes. In terms of mechanical phenomena, the ball is loaded, the power consumption is greater, and the mill productivity is also large. In addition, the material in the mill also includes ore and water, and there is a certain gap between the actual power and the theoretical power.
At higher rotation rates, the steel ball is in a throw-down state, and the situation is complicated in the throwing state. At a certain filling rate, as the turning speed increases, the steel ball will change from a plunging state to a throwing state. However, at different filling rates, the rotation rate required for the steel ball to change from leeching to throwing is also different. The filling rate is higher and the rotation speed required to change to the throwing state is higher.
In summary, we can know that at different speeds, the filling rate has a corresponding adaptation value. The fitness value is not as high as possible, and how to find the adaptive filling rate needs to be judged by experiment.
2. Ball mill steel ball size
The ore is ground in the ball mill
mainly by the impact crushing force generated when the steel ball is thrown off and the relative sliding of the steel ball to the ore. Impact crushing force, grinding and crushing capacity and processing capacity have a certain relationship with the size of the steel ball. According to the test results of the predecessors, the size of the steel ball is proportional to the impact crushing force, the grinding and pulverizing ability, and the processing amount of the steel ball falling under the same amount. And it is inversely proportional to the single energy consumption and grinding fineness of the steel ball within a certain range. If the steel ball is too large, the grinding grain size may not be reached.
Therefore, in the case of large hardness, large particle size and large grinding grain size, the steel ball size is appropriately increased, and the effect is remarkable in increasing production, energy saving and consumption reduction.