What are the differences between a dry ball mill and a wet ball mill?Date: 2019-11-14 Views:
Ball mill is a common equipment in grinding equipment, but also the material after the crushing and screening operation, the key equipment for grinding.According to the classification of grinding, the ball mill can be divided into dry ball mill and wet ball mill.What are the differences between a dry ball mill and a wet ball mill?
1. How it works
When the dry ball mill is running, the material enters the first bin of the mill uniformly through the feeding device through the feeding hollow shaft screw, and the bin is equipped with stepped lining board or corrugated lining board, which is equipped with steel balls of different specifications.The centrifugal force generated by the rotation of the ball mill barrel will bring the steel ball to a certain height and then it will fall down.
After the material is roughened in the first warehouse, it enters the second warehouse through the single layer compartment plate, which is equipped with flat lining plate and steel balls of different specifications to further grind the material.Finally, qualified materials are discharged through the discharge grates to complete the grinding operation.
The working principle of wet ball mill is similar to that of dry ball mill, but different.Wet ball mill needs to add appropriate amount of water or anhydrous ethanol in the grinding process, which means that the grinding concentration has certain requirements.The amount of water is determined by the nature of the material.Qualified materials are discharged out of the cylinder through the discharge part, and the unqualified materials are returned to the wet ball mill for further grinding.
2. Structural construction
Dry ball mill and wet ball mill both include feeding part, feeding part, rotating part, transmission part (reducer, small transmission gear, motor, electric control) and other major parts.
The difference is that the structure structure of the dry ball mill is relatively more complicated than the wet ball mill, and its discharge mouth is straight cylinder shape, and it is equipped with air device, dust pipe and dust collector, which is determined by its working principle.The structure of wet ball mill is simple, no need to add too many auxiliary accessories, discharge mouth is like a horn, built-in screw device to facilitate discharging.
3. Scope of application of ball mill
In general, the dry ball mill is suitable for all kinds of metal ore, non-metal ore, including water will react with materials, such as cement, marble and other building stone, or require powder form to store and sell products.In addition, if the plant is located in a dry area, water resources are scarce, for the sake of water conservation, can use dry ball mill.
Wet ball mill is applicable to a wide range of metal ore, non-metal ore, including gold ore, silver ore, copper ore, iron ore, molybdenum ore, phosphate ore, feldspar, fluorite and so on.Wet ball mills can be used as long as the material meets water and does not affect the quality of the final product.
It should be noted that when wet ball mill is used, the proportion of steel ball, material and water should be determined through ore dressing test to ensure the ideal grinding effect.As for the choice of what kind of grinding equipment, or depends on the ball mill follow-up operations, product nature and production costs.
Only by finding out the suitable grinding mode of the material, can the ball mill run efficiently and well, the two grinding equipment have their own advantages, we are still in the nature of the material, characteristics and the requirements of the product, working environment and other aspects of the rational choice.