Investigation of grindability of diasporic bauxites in dry, aqueous and alkaline media as well as after high pressure crushing

Bauxite grindability at elevated temperature in various mills

“…Our previous Hardgrove experimental results proved (Csőke et al, 2004) that under the tested special conditions there was a strong relationship between the Bond work index and the Hardgrove Grindability Index at room temperature. The suggested (modified) relation is as follows:…”

“…high temperature and caustic liquor, the laboratory investigation of its grindability requires special apparatus and methods. The Institute of Raw Material Preparation and Environmental Processing at the University of Miskolc have developed the Universal Hardgrove mill (Csőke et al, 2004(Csőke et al, , 2005a and the Universal Bond ball mill (Mucsi et al, 2006) in which the above mentioned circumstances can be simulated well. The results are summarized by Mucsi et al (2011).…”

“…Hardgrove Grindability Index of various bauxites was investigated in alkaline media as well as in water (Csőke et al, 2004). Authors observed that grindability decreased in water and liquor, however, water resulted in less reduction of the grindability.…”

Alternative Approaches for Determination of Bond Work Index on Soft and Friable Partially Laterised Khondalite Rocks of Bauxite Mine Waste Materials

“…It is mentioned earlier that friability value is measured from the brittleness test. Brittleness, defined differently from author to author, is an important mechanical property of rocks, but there is no universally accepted brittleness concept or measurement method in mechanical excavation [6]. Many studies can be seen of the relationship between brittleness and the other performance parameters of machines and rock properties in literatures [21].…”

“…The first one, which has been widely accepted approach, is Bond's grindability test and the second one is Hardgrove index, which generally used for coal. In recent, the brittleness test/friability value of bauxite, limestone, barite, marble, copper ore, andesite and ulexite [6][7][8][9] is also suggested to find out the work index of material. The Bond's grindability test can be used to determine the work index of any type of ore or material.…”