Abstract
The effect of grinding aids on the ultrafne grinding of feldspar was studied by using a vibrating rod mill with a laboratory-scale. Alcohols with different alkyl groups were mainly used as the grinding aids, and all of the experiments were carried out by dry batch operation. The variations in specific surface areas of the products were investigated with grinding time and amount of grinding aid. The results showed that alcohols were effective grinding aids on the ultrafine grinding of feldspar. However, the effect of grinding aids varied remarkably with the different kinds of alcohols and the amount of alcohol added. The most effective amount of grinding aid was found to increase with the fineness of the feldspar. The effect of alcohol is considered to be caused by the increase in the flowability of feldspar powder due to the alkoxylation of hydroxyl groups on the feldspar surface.
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