### (pdf) comparative analysis of grindability of iron

Bond index is useful in designing of grinding system in mineral processing. in this study, the bond work index of birnin- gwari iron ore in northern nigeria is determined using modified bond’s method using ‘reference ore’. samples of iron ore were sourced using random method, reference minerals marble and granite of known weight and iron ore of known weight were ground using the An identical weight of the limestone whose work index was to be determined fig. 1 location map of the study area was ground in the same ball mill at the same time and methods speed as the reference ore such that the same amount of power is consumed in grinding the two minerals.Apr 26, 2020 the bond rod mill work index is a commonly used metric to describe ore grindability in the middle size classes, generally from 12 mm down to 1 mm. there are a couple of rod mill Bond ball mill work index for pure quartz bond ball mill work index for pure quartz 2019114silicon is a chemical element with the symbol si and atomic number 14t is a hard and brittle crystalline solid with a bluegrey metallic lustre and it is a tetravalent metalloid and semiconductor is a member of group 14 in the periodic table carbon is.The work indices of various iron ores in the world were measured. from the values of the work indices of the iron ores, the powers required to grind the iron ores were estimated. and thus, the grindability of the iron ores was investigated. the results obtained are as follows 1 the work indices of the iron ores are ranged from 6.22 to 17.40.Dec 12, 2016 ball mill power calculation example. a wet grinding ball mill in closed circuit is to be fed 100 tph of a material with a work index of 15 and a size distribution of 80 passing inch 6350