In industries using grinding mill systems, it is a bit paradoxical to hear sometimes operators talk about the longevity of the mill even when no maintenance process has been followed for the mill. A grinding mill is a complex piece of machinery and is expected to face a great many number of stresses in its operation. Contrary to what is popularly understood, a grinding mill doesn’t face wear and tear simply on its grinding surfaces, such as pins in the case of pin mills, rather the entire assembly is subjected to a number of forces.
To get the return on investment expected from high quality grinding mill systems regular maintenance is a must.
In this article we look at what grinding mill maintenance entails. And, just to cut a long story short, regular maintenance is key to ensuring that grinding mill equipment performs at its best and the machinery yields the full return on investment, as was expected by the operator.
Gears and pinions – Power transmission causes stresses on machinery from the very off. Depending on the size of the grinding mill, even running the mill empty will place significant stresses on the drivetrain. Now add the material to be processed to the mix and the torque applied by the machinery and the resistance offered by the material impacting grinding pins will introduce very significant stresses on the power transfer system. Regular maintenance of a grinding mill will ensure that worn out or damaged gears and pinions will be caught before they break and cause internal damage.
Worn out pins – In a pin-type grinding mill, the grinding operation is carried out by systematically impacting the material with pins mounted on rotating discs. Depending on the hardness of the material and duration of operational cycles, pins can face a great deal of wear and tear from the constant impacting. Worn out and broken pins must be replaced in order to maintain the efficiency of the grinding mill.
Screens – The screens used in grinding mills are of a high quality and robust. And they need to be, what with the quantity of material that can be ground by a high quality mill. However, screens too will get damaged over time and reduce the consistency of the processed material. On the other hand, clogged screens will affect the accuracy of the finished milling and reduce the speed of production too.