Assume the rod mill work index of 95 applies from the actual rod mill feed sizeof 19300 m although some of this work might ideally be done by crushers to achieve a rod mill f80 of 16000 m to a rod ,Bond Rod Mill Index Test.
The specification for the apparatus to determining a bond rod mill work index is first described in bond maxton 1943 it states that the apparatus is a tumbling rod mill to be operated in a locked cycle test at a fixed circulating load
More DetailsGeostatistics the bond ball mill work index test is thought to be additive because of its units of energy nevertheless experimental blending results show a nonadditive behavior the spi r value is known not to be an additive parameter however errors introduced by
More DetailsMar 29 2017 the metso abrasion test is mainly used to assess hammer wear in an impact type crusher eg a hammer mill hence the much higher rotational speed whereas the
More DetailsThe bond ball mill work index test is thought to be additive because of its units of energy nevertheless experimental blending results show a nonadditive behavior 18 the spir value is known not to be an additive parameter however errors introduced by block kriging are not thought to be significant
More DetailsWorld it shows that the ball mill work index is normally distributed with an average of 146 and a median of 148 kwht bond rod mill grindability the bond rod mill grindability test is performed similarly to the ball mill test the feed sample is stagecrushed to and the test
More DetailsThe test of determining the standard bond rodmill work index includes a closed grinding cycle with a screen the oversize fraction in each cycle except the first cycle consists of the oversize fraction in the fresh feed and in the previous grinding stage
More DetailsBond rod mill index test brmwi a bond rmwi test is a standard test for determining the rod mill work index of a sample of ore it was developed by fred bond in 1952 and modified in 1961 the brmwi is a measure of the resistance of the material to crushing and grinding it can be used to determine the grinding power required for a given throughput of material under rod mill grinding
More DetailsBond rod mill grindability test the test is a closedcircuit dry grindability test performed in a standard rod mill it can be performed at mesh sizes ranging from 4 mesh to 65 mesh the normal finishing size is 14 mesh feed sample requirements 15 kg of minus 12 ore
More DetailsFigure 5 bond rod mill work index v unconfined compressive strength 0 100 200 300 400 ucs mpa 5 10 15 20 25 30 35 wirm metric the lack of fit observed relating the crushing work index was expected to carry over to the other bond work indices figure 5 displays the plot of rod mill work index wi rm versus ucs these
More DetailsRod mill work index is used in the bondbarratt specific energy consumption model the work index is used to calculate the energy requirement to grind rocks in the medium size range from 10 mm 20 mm down to about 2 mm
More DetailsUpon obtaining a consistent ipp the undersize product of the final cycle is sized to obtain a work index bond ball work index bbwi the sample is staged crushed to 100 passing 335 mm
More DetailsIn a closed circuit dry grinding environment the ground product for the laboratory sag mill is then submitted to the bond ball mill work index test the number of sag mill revolutions required to grind the material to a p 80 of 17 mm is used to predict agsag specific energy using quation 4 correction e
More DetailsComparison of ore hardness measurements for grinding mill design for the tenke project john starkey1 to obtain the jk parameters using the jk drop weight test standard bond crushing and rod mill work indices abrasion indices and by dawson for bond bond rod mill work index bond abrasion specific gravity 2 methods
More DetailsThe bond index conforming rod charge consists of 6 rods of 125 diameter and 21 length 2 rods of 175 diameter and 21 length the grinding jar for the bond index rod mill is 12 x 24 in size and has a waveshaped design at least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill
More DetailsMay 19 2013 ball mill critical speed working principle duration 540 911 metallurgy corp 223717 views
More DetailsThe bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling however the mass of ore required to conduct the test which can typically vary from
More DetailsIn 1991 the canadians developed the sagpower index spi test using 2 kg of material in a 300 mm diameter mill this test has been further developed by starkey hindstrom and orser 2006 this test now includes a bond ball mill work index test the macpherson test is
More DetailsThe bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling however the mass of ore required to conduct the test which can typically vary from about 8 to as much as 20 kg may represent a challenge when sample availability is critical
More DetailsThis test determines the bond rod mill work index which can be used with bonds third theory of comminution to calculate net power requirements of sizing rod mills the test is a closedcircuit dry grindability test is run in a standard rod mill and can be performed at sizes ranging from 476 mm to
More DetailsGrinding solutions can carry out bond rod mill work index tests to determine the energy requirements for milling ore in a rod mill the test requires a minimum of 20kg of 125mm material closing screen sizes typically range from 475mm to 212m abrasion index test the abrasion index is a recognised procedure to quantify abrasiveness and approximate wear that can be expected on media and mill
More Details