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

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be used to calculate Mergan work index but this Mergan work index differs from the Bond work index Therefore it is needed to analyze if the Mergan work index correlates with Bond work index All the testwork was conducted using Outotec Mergan and Bond ball mills at Outotec Research Center located in the city of Pori Finland

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The grinding jar of the Bond Index Ball Mill measures 12″ x 12″ and has well-rounded corners Module Rod Mill Minerals pre-crushed to 12 50 mm and sieved Drillcore pre-crushed to 12 50 mm and sieved Half a drillcore pre-crushed to 12 50 mm and sieved The Bond Index conforming rod charge consists of 6 rods of 1 25" diameter and 21" length 2 rods of 1 75" diameter and 21" length The

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bond index mill chrome ore Chromium processing Much of the ore is rich enough to be used directly for production of ferrochromium a rich lumpy ore containing more than 46 percent Cr 2 O 3 and having a chromium-iron ratio greater than 2 1 is preferred but ores with a lower ratio and as little as 40 percent Cr 2 O 3 are also used

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Bond Work Index Procedure and Method 201976enspenspThis 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 appliion methods are used to process 1/2″ ore samples in a Ball Mill using a standard ball charge

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The Bond Ball Mill Work Index (BBWi) test is carried out in a standardised ball mill with a pre-defined media and ore charge The test requires a minimum of 10kg of sample that has been stage-crushed to passing size of 3 35 mm Any screen size below 600m can be used for the testwork depending on your requirements

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and its correlation As a fast method the determination of the Bond index from the Hardgrove index (by calculation) is almost matching with measured Bond's work index The Bond's work index of the above rock samples calculated from the Hardgrove index value has shown a variation from 7 7 to 10 3

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BENCH SCALE COMMINUTION TEST WORK qBond Work Index Testing Bond Ball Work Index Bond Rod Work Index Bond Crushability Work Index Bond Abrasion Work Index qJK Tech Testing JK Drop weight Test SAG Milling Comminution Test (SMC) COMMINUTION PILOT PLANT qAG/SAG Pilot Milling Mill dimensions 1 7m x 0 6m length Typical throughput 0 5 -3 5 t/h

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micrometers in size According to the Bond standard procedure the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250% circulating load (Bond 1949 1952 1961) The test is performed on a raw material approximately weighing 10 kg which coarseness is -3 327 mm

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3 index bond ball mill labtech 3 index bond ball mill Semi Autogenous Grinding Technology ore grinding using rod mills hardgrove grindability index of limestone Labtech Index Ball Bond Mill Buy Used Semiconductor Manufacturing and Test Equipment at CAE CAE is the world39 s largest marketplace for the purchase and sale of used surplus

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The grinding jar of the Bond Index Ball Mill measures 12″ x 12″ and has well-rounded corners Module Rod Mill Minerals pre-crushed to 12 50 mm and sieved Drillcore pre-crushed to 12 50 mm and sieved Half a drillcore pre-crushed to 12 50 mm and sieved The Bond Index conforming rod charge consists of 6 rods of 1 25" diameter and 21" length 2 rods of 1 75" diameter and 21" length The

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grams per revolution (Gbp) is the ball mill grindability The ball mill work index Wi (kWh/short ton) is calculated from the following equation (Bond 1961) 1 The mill should be cleaned by either blowing air into it or wiping the interior with a cloth and or brush The FC Bond ball mill is now ready for the next sample

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3 2 x 3 1 m grate ball mill capacity - nirmalhotel 3 2 x 3 1 m grate ball mill capacity guidetti stone crusher caesar 3 3 index Bond Ball mill vibrating screen machine 3 5 deck home used hammer mill 3 hp Get Price potpourri crusher kuwait - Top Crusher Supplier

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Bond ball mill of ΦD/L= 0 3048/0 3048 m dimensions at the speed of 70 rpm The mill is loaded with 21 125 kg standard sized balls and 700 cm3 of grinded materials to under 3 35 mm The test procedure takes from 7 to 10 grinding cycles with the required amount of material for whole procedure being approximately 10 kg Once

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3 index Bond Ball mill - CGM Grinding Plant Bond Ball Mill Work Index | GOLD METALLURGY The Bond Ball Mill grindability test is used to determine the work index for a specific ore grinding application More price of bond ball mill - rock screening What Is a Ball Mill for Mining? Ball mill machine is one kind of ore processing equipment

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The Bond ball mill work index is one of the most commonly used grindability tests in mining and is often referred to as the Bond work index The test is a 'locked-cycle' test where ground product is removed from test cycles and replaced by fresh feed

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The procedure for determining the working index of Bond spherical grinding [16 3] (hereinafter - BWi) is a periodic dry grinding in a standardized grinding mill at a fixed drum rotation speed (70 rpm) standardized ball loading (20 125 kg) and feed size (-3 35 + 0 mm)

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Oct 15 2015The Bond Work Index (BWI or Wi) is defined as the calculated specific energy (kW h/t) applied in reducing material of infinite particle size to 80% passing 100 μm [25] The higher the value for Wi the more energy is required to grind a material in a ball mill [10] [26]

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The only answer to this question is the meth- Wi is conducted in a Bond ball mill having the dimensions D L = od of comparative grinding tests in the Bond mill of a reference sam- 305 305 mm and a speed revolution of 70 min −1

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Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done Add about 500 g of silica sand into the mill containing the ball charge Seal the mill Rotate for 20 revolutions to clean Empty the mill charge and sand into the ball try once grinding is complete Clean out the mill using a brush Put the lid on the mill

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Energy saving mining ball mill is a key equipment in beneficiation plant It is widely used in ore dressing production line such as Gold ore Cooper ore Magnetite ore Antimony Calcite Kaolin Mica Clay Bentonite etc Ferrou metal or Nonferrous metal materials

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Bond ball mill work index C Wi Bond crusher work index D HPGR roll diameter (m) E sp net specific energy consumption (kWh/t) F HPGR hydraulic pressing force (kN) F 80 particle size at which 80% of particles pass in feed F SP 2HPGR specific pressing force (N/mm ) L HPGR roll length (m) ṁ or m-dot HPGR specific throughput constant (ts/hm3)

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closing screen for the ball mill test one (standard square root of 2 series) mesh size coarser than the plant ball mill circuit P80 If between standard mesh sizes the finer of the chose two Results of Bond ball mill tests conducted with closing screens of 75 m or finer are to be treated with caution The

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3 index bond ball mill in bangalore - radiovoiceover why is the bond ball mill grindability test done Ball Mill Speed Calculation 3 P80 is the Bond ball mill work index (kWh/t) bond ball mill Obtenez le prix labtech index ball bond mill in Nigeria - Gold Ore Crusher

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Bond 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

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Ball Mill Wio BWio 8 6 Circuit Wio OWio 14 6 Bond Ball Mill Work Index BWi kWh/t 13 4 Bond Rod Mill Work Index RWi kWh/t 18 1 Table 1 Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have a large effect on

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Bond ball mill work index C Wi Bond crusher work index D HPGR roll diameter (m) E sp net specific energy consumption (kWh/t) F HPGR hydraulic pressing force (kN) F 80 particle size at which 80% of particles pass in feed F SP 2HPGR specific pressing force (N/mm ) L HPGR roll length (m) ṁ or m-dot HPGR specific throughput constant (ts/hm3)

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Bond Index Mill For Grinding China Coal Vertical Mill bond ball mill work index clinker Grinding Mill China Ball mills are used primary for single stage fine Get Price bond index mill for grinding china - stone crusher plant Tower mills often called vertical mills ROD MILLS BOND INDEX MILLS labtech 3 index bond ball mill

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