Abstract
This paper presents a conceptually simple derivation of grinding media mass wear rate model. An experiment of milling one media in ball mill was designed to reveal the relation between media mass wear rate and the contacting points of the media with the other media and/or mill wall and the pressure acting on the point. It was found that mass wear loss of spherical grinding media is proportion to the media contacting points with other media and/or mill wall and the pressure acted on it. A physical model: f=Am−1⁄3t−1+b was established by theory derivation and experiment testing. Two kinds of ceramic ball grinding media, 97 porcelain media and 75 porcelain media, were prepared. The mass wear rate of the two kinds of media was determined by intergrinding with ordinary corundum milling media in ball mill. The experimental results were equated using least square method. The mass wear rate equating results of both kinds of ceramic grinding media was almost the same as the experimental results indicating the accuracy of the model. It is found that the higher the media performance was, the more accuracy the media wear rate as predicted by the model. The possibility of using this model in practical operations was also discussed in this paper.
