When the concentrator is initially built, it is necessary to design the location of each type of equipment and the required floor space, so it is necessary to choose a good equipment model and determine the number in advance.Ball mill is an essential equipment in every concentrator, and the grinding operation is the last step before the separation, its importance can be inferred.How to choose the proper ball mill becomes the inevitable problem in the early stage of plant construction.
The selection method of ball mill
The selection of ball mill seems simple, but in fact it is not, we need to consider the raw ore properties, dressing process yield, equipment performance, parameter values and other factors, to choose the appropriate ball mill equipment.Each of these four aspects is described here to help you select the right and appropriate device.
1. Nature of raw ore
The raw ore property mainly refers to the hardness of the ore. The hardness of the ore determines the selection of barrel diameter and length of the ball mill. For fragile minerals with small hardness, the barrel diameter can be selected according to the daily output.For the ores with high hardness and difficult to break, the ball mill with large barrel diameter is needed to increase the inner space of the barrel and strengthen the grinding effect of the grinding medium on minerals. In terms of length, the longer barrel is also needed to increase the grinding time, so as to reach the standard of material size quickly and avoid repeated rework.
2. Production of mineral processing technology
The output, production capacity and scale of the dressing process should be the main factors for selecting the ball mill of the dressing plant.
If the output of the selected ball mill is lower than the scale of the mill, the construction period may be delayed and even the subsequent separation operation may be affected.
If the output of selected ball mill is higher than that of the mill, it will cause unnecessary waste.
In addition, the selection should take into account such as complex concentrate re-grinding, ore re-grinding, tailings re-grinding, re-selection of coarse grinding, fine grinding, etc., all need to extract reasonable planning
3. Equipment performance
In the selection of equipment performance, the first consideration should be whether it can adapt to the dressing technology and scale.
For example, some chemicals or minerals may be easily oxidized or corrosive.
This kind of circumstance should choose silicon dioxide ball, ceramic ball, ceramic liner board, rubber liner board.
4. Parameter values
Before selecting the type of ball mill, the effective volume, optimal speed, handling capacity, maximum loading capacity and motor power of the ball mill should be roughly calculated according to the size of the dressing plant and the dressing process.
In combination with the technical parameter values given by professional ball mill manufacturers for reference and comparison, the appropriate model is finally selected.
In addition, the choice also needs to take into account the lining plate, steel ball and other accessories wear.
