In the process of grinding, with the increase in processing accuracy, high-speed and high-power grinding technologies are rapidly developing. Besides selecting reasonable grinding parameters, it is essential to enhance the circulation quality of the grinding fluid. Purification devices are categorized into two types: filtration and dynamic. Filtration systems rely on filtering media to remove impurities, such as mesh, slotted, blade, and belt filter machines. Dynamic systems utilize forces like centrifugal, magnetic, or gravity to separate impurities, such as centrifugal, vortex, and magnetic separators.
When grinding ferromagnetic materials, the waste liquid contains both ferromagnetic substances and non-ferromagnetic impurities. Generally, a magnetic separator is used to remove over 80% of the impurities. For better control of filtration precision, a combination of a magnetic separator and a belt filter press is recommended.