The invention relates to a novel production method for a mixed
grinding material. The method comprises the following steps: mixing
zirconium silicate and
alumina; carrying out ball milling on the mixture so as to obtain mixed micro-
powder; putting the mixed micro-
powder, water and a dispersant into a sorting
barrel and standing the mixture for settlement after stirring; carrying out sorting, wherein two sub-steps are included, namely, a) sucking out a
slurry on the upper layer of the sorting
barrel with a
siphon, adding clear water to the sorting
barrel until the mixture reaches the initial liquid level before siphoning, and carrying out stirring,
settling and siphoning so as to obtain particles of a grade, and b) adding the dispersant and clear water into the sorting barrel until the mixture reaches the initial liquid level before siphoning and repeating the steps of stirring,
settling and siphoning so as to obtain particles of another grade;
drying the obtained particles with different grades so as to obtain a finished product. The mixed
grinding material produced in the invention enables damage of micro-
powder to the surface of a ground material in
grinding to be substantially reduced and plays a very critical role in improving the quality of surface
polishing of an object and in reducing
polishing cost.