A quick method for the Bond work index approximate value determination which is based on the first order grinding kinetics is presented in this paper. test approach to estimate the ball mill
Chat OnlineOct 19 2017 · Bond formula for the grinding balls size calculation October 19 2017 · Archive · 0 . The enterprises consumers grinding media have a question about right choise the grinding ball size (diameter) for the mill in order to achieve the required grinding quality.
Chat Onlinecommercial grinding conditions for the test in a 0.5 m diameter SAG mill. In the 2009 database SAG pinion energies (to grind from F80 152 mm to T80 1.7 mm) vary from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150 000 t/d SAG mill sizes varied from 10 ft
Chat OnlineThe aim of this study was to develop a new method for assessing the Bond work index in a ball mill (BBWI) which is based on a first order kinetics present in the Bond ball mill for grinding mineral raw materials (Austin et al. 1981 Ahmadi and Shahsavari 2009). Theoretical basis of quick procedure
Chat Online(HGI) being the standard test for vertical spindle mills 7 8 and the Bond Work Index (BWI) for tube and ball mills 9 10 . No stan-dard grindability tests currently exist for biomass and there have only been limited studies on the use of standard grindability tests for coal on biomass which have mainly focused on torrefied mate-rials 11
Chat OnlineThe Bond Ball Work Index Test determines the resistance of ore to grinding in a ball mill expressed as a work index kilo Watt hour per ton (kWh/t). The work index is then used to calculate the specific energy requirements for sizing ball mills or determining their throughput for a target grind. Sample Requirements 10kg -3.35mm
Chat OnlineThe EDEMET Bond Mill is designed to perform the Bond ball mill work index test to determine the grinding energetic consumption of diverse minerals. As this is a standard test its design has been maintained according to the traditional equipment. Aditional information about the EDEMET Bond Mill can be found currently in our spanish websites edemet.cl
Chat Onlineby Hazen Research Inc. (HRI) 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 Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design (SAGDesign) Tests patented by Outokumpu. (See reference 8 below).
Chat OnlineMar 29 2017 · The abrasion test is mainly used to assess hammer wear in an impact type crusher (e.g. a hammer mill) hence the much higher rotational speed whereas the Bond abrasion test is
Chat OnlineWiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy requirement at
Chat OnlineComparison of UCS to Bond Work Indices Alex Doll Alex G Doll Consulting Ltd Edmonton Canada Derek Barratt DJB Consultants Inc North Vancouver Canada Ken Wood Fluor Mining Minerals Vancouver Canada Abstract Unconfined Compressive Strength (UCS) is a commonly used rockmass strength measurement used by
Chat Online(HGI) being the standard test for vertical spindle mills 7 8 and the Bond Work Index (BWI) for tube and ball mills 9 10 . No stan-dard grindability tests currently exist for biomass and there have only been limited studies on the use of standard grindability tests for coal on biomass which have mainly focused on torrefied mate-rials 11
Chat OnlineBond Index Test Test conducted on a Bond Index testing mill (Bico-Braun USA) 700ml of sample milled for 100 revolutions. New number of revolutions is calculated to produce fines equal to 1/3.5 of the total charge of the mill. The Bond Work Index W i expresses the resistance of the material to
Chat OnlineClosed circuit 8 dia. ball mill to P80 um The ore Test Work Index = Circuit Operating Work Index 9 The Standard Bond Circuit Coarse Ore Bins Fine Ore Bins Screen Crushing Screen Classification Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL WORK INDEX EFFICIENCY DETERMINATIONS 10
Chat OnlineBond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond s Third Theory of Comminution to calculate net power requirements when sizing ball mills . Various correction factors may have to be applied. The test is a closed-circuit dry grindability test performed in a standard rod mill.
Chat Online2.4. Bond Ball Work Index Test A grinding mill (F305 mm 305 mm) was used for the Bond ball mill work index test 18–21 . This ball mill was filled with 285 steel balls (total weight of 20.125 kg) at an operation speed of 70 rpm. The feed sample was prepared via crushing and sieving giving rise to a size smaller than 3.35 mm.
Chat Online1. Introduction. A Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore. It was developed by Fred Bond in 1952 and modified in 1961 (JKMRC CO. 2006).This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill
Chat Online2.4. Bond Ball Work Index Test A grinding mill (F305 mm 305 mm) was used for the Bond ball mill work index test 18–21 . This ball mill was filled with 285 steel balls (total weight of 20.125 kg) at an operation speed of 70 rpm. The feed sample was prepared via crushing and sieving giving rise to a size smaller than 3.35 mm.
Chat OnlineThis 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 <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.
Chat OnlineWiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy requirement at
Chat OnlineMay 19 2013 · This video was put together by Joshua Wright and Aldo Vasquerizo as a supplemental lecture for University of Nevada Reno. If you have any questions need advice or need to conduct a metallurgical
Chat OnlineBond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond s Third Theory of Comminution to calculate net power requirements when sizing ball mills . Various correction factors may have to be applied. The test is a closed-circuit dry grindability test performed in a standard rod mill.
Chat OnlineBond s approach consists of determining the ore hardness characteristics or Work Index (Wi) via standardized laboratory testwork. The full suite of Bond comminution tests provide the Ball Mill Work Index (BWi) the Rod Mill Work Index (RWi) the Crusher Work Index (CWi) and the Abrasion Index
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