THE EFFECT OF GRINDING TIME ON THE SPECIFIC SURFACE AREA DURING INTENSIVE GRINDING OF MINERAL POWDERS A. H. Emami1, M. Sh. Bafghi1, J. Vahdati Khaki2 and A. Zakeri 1 [email protected] Received November 2008 Accepted March 2009 1 Department of Metallurgy and Materials Engineering, Iran University of Science Technology, Tehran, Iran
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