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MINE 331 - Bond Work Index - ii MINE 331 Bond . The bond work index of granite is expected to be the highest due to the ore being mostly composed of the hard mineral quartz. Bond Work index values of granite presented in literature range from around 14-15. Limestone is theorized to have a Bond Work index with a value of around 11.
Bond Mill Work index English to French Mining. English term or phrase Bond Mill Work index Context The Ball Mill Work Indices BMWi varied both between and within the deposits but were generally moderate in the range of 7 to 12 kWht Je pense Indice du travail au broyeur boulets. PDF A Methodology to Estimate Ores Work Index Values
grinding bond work index range for limestone. Chemical analyses and thin section petrographic analyses were used to characterize the limestone samples the results of the laboratory ball mill test were compared to the results of an industrial grinding test, the bond work index, for six samples which covered the grindability range
In general, Bonds work index is used to determine the grinding efficiency and also to calculate the power requirement. The process is very time consuming and it requires skilled labor and specialized mill. A systematic investigation was carried out to predict Bonds work index using simple field measurable properties of rocks.
In this paper, systematic errors encountered in a rod mill Bond Work Index determination related to the weight and size distribution of the sample are first estimated experimentally. The first type is shown to be relatively small, whereas the second can be as high as 3 kWht when the feed size F 80 is finer than 3.0 mm. A phenomenological basis ...
The Bonds standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80 passing 100 m. If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work
BOND WORK INDEX. The Bond Work Index is a factor that measures the energy consumed in size reduction operation of the ore. The Bonds Work Index equation is WWI 10P80 -10F80 where. W the energy input Work input per ton, kwhmetric ton. WI Work Index specific energy per ton, kwhmetric ton characterizes the ore
The Bond work index determination according to the standard Bonds test is done on all these samples with compara-tive sieve size of 74, 105 and 150 microns. The Bond Work Index is calculated using the formula Bond, 1961 1 where W i Bond work index kWht P c test sieve mesh size m
BWI is an abbreviation for Bond Work Index. Search for abbreviation meaning, word to abbreviate, or category. Shortcuts for power users - examples. Abbreviation meaning - COB means. To abbreviate - Management abbreviated. Category - Medical terms. Abbreviation in category - Bae in slang.
Jun 19, 2015 Source 1 Table of materials reported by Fred Bond Source 2 Outokumpu, The science of comminution Source 3 Equipment and pipelines Source 4 Tenova Bateman mills AGSAG, Rod, Ball Mills Source 5 Doering international GmbH www.cylpebs.com Source 6 SME handbook of mineral processing, N.L Weiss Editor, NY 1985. Bond Work Index Tester
Bond impact crushability work index CWi Bond, 1963 results reported for iron ores vary from hard iron ore 17.7 kWht to medium hardness iron ore 11.3 kWht and friable iron ore 6.3 kWht Table 2.11 Clout et al., 2007.
of these samples were estimated. The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite high abrasion value and low compressive strength to 20.4 kwh ton- 1 for granite low abrasion value and high modulus of elasticity. The correlation between the abrasion valueX2 and work index Wi is found
Jun 06, 2015 Bond Work Index Procedure and Method This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process 12 ore samples in
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FIGURE 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
Where, WioACTis the Actual Operating Bond Work Index kWht, W is the specific energy input kWht, P80 is the 80 passing size of product m, and F80 is the 80 passing size of circuit feed m. 2. Calculate the Standard Circuit Bond Work Index WiSTD for
The Laboratory Comparative Work Index gives an approximate Bond Work Index for an ore sample. This can then be used with Bonds Third Theory of Comminution to calculate net power requirements needed for grinding. The test depends on laboratory batch grinding and uses a comparison with the grinding of an ore of a known Bond Work Index.
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