
Ball mills are used primary for single stage fine grinding, regrinding, and as the second stage in two stage grinding circuits. According to the need of customers, ball mill can be either wet or dry designs.…

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Bond Work Index
Determination of the Bond Work Index of Ores A.J.C.Taguiam Department of Mining, Metallurgical and Materials Engineering University of the Philippines, Diliman [email protected] Abstract The Bond work index refers to the measure of a material''s hardness or resistance to crushing and grinding, and is numerically expressed as kilowatt hours per short ton.
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Bond Work Index. In the 1930s through early 1950s, Bond developed a new theory of comminution that introduced an index, called the ''Bond Work Index'', which relates power consumption in crushing and grinding to the feed and product size distribution. His theory and index were introduced in a widely cited 1952 journal article.
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FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric) The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS. There is no
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The Bond work index is defined as the kilowatthours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage
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An improved method using less mass compared to the Bond Ball Mill Work Index test The JK Bond Ball Mill (JKBBM) test, is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and material feed size ( passing 3.35 mm) as the Bond Ball Mill Work Index test.
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It can be used at mesh sizes from 65 to 200 mesh (normally 100 mesh). The test requires calibration against the standard Bond Ball Mill Work Index test to estimate the Work Index. It is used to show the orebody hardness profile and to predict throughput in a ball mill circuit.
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· Bond Work Index (BWI) versus Hardgrove Grindability Index (HGI). However it should be noted that this correlation is based on a very limited number of samples and is only applicable for the test equipment and experimental conditions used to obtain the W i and HGI values.
Get price(PDF) A Methodology to Estimate Ores Work Index …
Results of 30 Bond Work index tests of six pure materials (calcite, magnesite, labradorite (feldspar), quartz, andalusite and glass) using closing screen apertures (P1) values of 500, 250, 125, 90 ...
MINE 331
Bond Work index values of granite presented in literature range from around 1415. Limestone is theorized to have a Bond Work index with a value of around 11. This is due to the main presence of calcite, a softer mineral. Sandstone is also often referenced with
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Bondwork index of a wide range of bauxites and other aluminabearing ores. … The alumina plants owned by RUSAL also import bauxitebearing raw materials … »More detailed Bond index of limestone – OneMine Mining and Minerals Library ...
Get priceInvestigation into the applicability of Bond Work Index …
· Bond Work Index (BWI) versus Hardgrove Grindability Index (HGI). However it should be noted that this correlation is based on a very limited number of samples and is only applicable for the test equipment and experimental conditions used to obtain the W i and HGI values.
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bond crushing work indexMining crushing machinery information Mobile Crusher. The mobile crushing plant has the advantages of easy transportation, low transportation cost, flexible configuration, convenient maintenance etc. Read more copper slag crusher ...
Get price20150505 Bond EfficiencyGMGICEv1r04 Determining the Bond Eﬃciency of industrial grinding circuits
Global Mining Guidelines Group (GMG) DETERMINING THE BOND EFFICIENCY OF INDUSTRIAL GRINDING CIRCUITS3 (equation 5) is equal to the inverse of the Wi Efficiency Ratio; it can be used by multiplying against the laboratoryderived WiSTDto give the actual operating work index of a circuit, ...
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Determination of the Bond Work Index of Ores A.J.C.Taguiam Department of Mining, Metallurgical and Materials Engineering University of the Philippines, Diliman [email protected] Abstract The Bond work index refers to the measure of a material''s hardness or resistance to crushing and grinding, and is numerically expressed as kilowatt hours per short ton.
Get priceGrindability » Laboratory and Analysis Technology » Pilot …
These tests complement the Bond work index, so that the ideal mill can be designed. At CEMTEC''s laboratory, there are four batch mills of different sizes for these tasks. They include an ironfree drum mill with a diameter d = 0.5 m and an effective grinding length l = 0.4 m.
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Work Index. Bond estimated the amount of wear in terms of kilograms per kWh based on the abrasion index, A;, i.e., Wet Ball Mill = kg kWh = 0.16(A i0.015) 0.33 Dry Ball Mill = kg / kWh = 0.023A i 0.5 Replacement Ball Size Rowland and Kjos proposed the
Get price20150505 Bond EfficiencyGMGICEv1r04 Determining the Bond Eﬃciency of industrial grinding circuits
Global Mining Guidelines Group (GMG) DETERMINING THE BOND EFFICIENCY OF INDUSTRIAL GRINDING CIRCUITS3 (equation 5) is equal to the inverse of the Wi Efficiency Ratio; it can be used by multiplying against the laboratoryderived WiSTDto give the actual operating work index of a circuit, ...
Get priceComparison of UCS to Bond Work Indices
FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric) The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS. There is no
Get price(PDF) A Methodology to Estimate Ores Work Index …
Results of 30 Bond Work index tests of six pure materials (calcite, magnesite, labradorite (feldspar), quartz, andalusite and glass) using closing screen apertures (P1) values of 500, 250, 125, 90 ...
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> Mining News > bond rod mill work index Print bond rod mill work index Posted at:January 2, 2013[ 4.8  3986 Ratings] Titan Bond Work Index Rod Mill  Titan Process Equipment Ltd. The Titan Bond Work Index Rod Mill is onepiece cast construction with. mill ...
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Bond indexing, sometimes called passive bond investing, is a popular approach to building fixed income allocations. A bond index strategy is a portfolio of bonds that seeks to track the performance of a market index, such as the Bloomberg Barclays U.S. Aggregate Bond Index..
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bond crushing work indexMining crushing machinery information Mobile Crusher. The mobile crushing plant has the advantages of easy transportation, low transportation cost, flexible configuration, convenient maintenance etc. Read more copper slag crusher ...
Get pricebond rod mill work index
> Mining News > bond rod mill work index Print bond rod mill work index Posted at:January 2, 2013[ 4.8  3986 Ratings] Titan Bond Work Index Rod Mill  Titan Process Equipment Ltd. The Titan Bond Work Index Rod Mill is onepiece cast construction with. mill ...
MINE 331
Bond Work index values of granite presented in literature range from around 1415. Limestone is theorized to have a Bond Work index with a value of around 11. This is due to the main presence of calcite, a softer mineral. Sandstone is also often referenced with
Get priceGrindability » Laboratory and Analysis Technology » Pilot …
These tests complement the Bond work index, so that the ideal mill can be designed. At CEMTEC''s laboratory, there are four batch mills of different sizes for these tasks. They include an ironfree drum mill with a diameter d = 0.5 m and an effective grinding length l = 0.4 m.
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Bond Index Ball Mill Rod Mill BT 100 XL RETSCH The grinding jar for the bond index rod mill is x in size and has a waveshaped design at least to kg sample material is required to simulate a closed grinding circuit in a ball or rod mill the rod mill work index rwi ...
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the Global Mining and Standards Group Salt lake City, 2014 Based on Presentation to the 2008 Meeting of SME, by C.A. Rowland, Jr. and R.E. McIvor. Bond Grinding Circuit Efficiency • The Bond Work Index equation • Ore test WI • Circuit operating WI 2 2/20 ...
Get priceBond Mill Work index  English to French  Mining & …
Tech/Engineering  Mining & Minerals / Gems / Mine feasibility 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 kWh/t."
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Bond Work index values of granite presented in literature range from around 1415. Limestone is theorized to have a Bond Work index with a value of around 11. This is due to the main presence of calcite, a softer mineral. Sandstone is also often referenced with
Get priceComparison of UCS to Bond Work Indices
FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric) The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS. There is no
Get priceBond Mill Work index  English to French  Mining & …
Tech/Engineering  Mining & Minerals / Gems / Mine feasibility 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 kWh/t."
Get price20150505 Bond EfficiencyGMGICEv1r04 Determining the Bond …
Global Mining Guidelines Group (GMG) DETERMINING THE BOND EFFICIENCY OF INDUSTRIAL GRINDING CIRCUITS3 (equation 5) is equal to the inverse of the Wi Efficiency Ratio; it can be used by multiplying against the laboratoryderived WiSTDto give the actual operating work index of a circuit, ...
The Bond work index
Fred Bond is being inducted into the International Mining Technology Hall of Fame in the comminution category for 2015. The word Bond is synonymous with grinding circuit design, e.g. Bond Grindability and Bond Work Index. Fred Bond''s work on circuit design
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Work index of 14.6 kWh/t, from the Bond Ball Mill is indicative of a hard ore. The hardness indexes are defined as follows: Property Soft Medium Hard Very Hard
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The Bond Work Index approach is the standard method of selecting ball mills to grind from about 3 mm to 25 µm provided that correction factors are used if necessary. The power prediction is fairly accurate for devices that produce a product with a size
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The Bond work index (Bond, 1960) is based on Bond''s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger''s law. Accordingly, the energy consumed in reducing the particle size from x F to …
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bond crushing work indexMining crushing machinery information Mobile Crusher. The mobile crushing plant has the advantages of easy transportation, low transportation cost, flexible configuration, convenient maintenance etc. Read more copper slag crusher ...
Get priceInvestigation into the applicability of Bond Work Index …
· Bond Work Index (BWI) versus Hardgrove Grindability Index (HGI). However it should be noted that this correlation is based on a very limited number of samples and is only applicable for the test equipment and experimental conditions used to obtain the W i and HGI values.
Get price