
20150821 Morrell Method
Autogenous Grinding (AG) Ball mill Bond Work Index (Wi) Comminution circuit High Pressure Grinding Rolls (HPGRs) Rod mill SemiAutogenous Grinding (SAG) Specific energy (W) 4 INTRODUCTION AND BACKGROUND The Morrell method for predicting the specific energy consumption of conventional crushing High Pressure Grinding Rolls (HPGRs) and
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bcl_1780574271 htm
• Bond ball mill work index • Quality testing as a third party • Abrasion testing and tumble resistance ISO 3271 • Green ball wet and dry drop tests • Liberation grinding tests • Preparation of quality control and check samples • Heavy liquid specific gravity separation tests • Specific gravity • Bond rod mill work index • Particle crushing strength • Green balling/batch
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Application of Operating Work Indices in Autogenous
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 profitability Mill operators have long used operating work indices to evaluate grinding circuit
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Testwork: Bond ball mill work index
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 'lockedcycle' test where ground product is removed from test cycles and replaced by fresh feed
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Retsch : Спомагателни продукти : Bond индекс тестер
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 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
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Essa Bond Test
Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index and the Bond rod mill work index These are empirical indices determined by close circuit grindability tests developed by F C Bond in the mid 1930's They require a specific 305mm diameter
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Bond Grinding Circuit Efficiency
Bond Grinding Circuit Efficiency Meeting of Bond Efficiency Guideline Working Group of 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
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Rapid determination of Bond rod
Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power In the current research a simple fast and accurate procedure is introduced to find the rodmill work index based on the conventional Bond work index
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Bond Work Index Rod Mill
The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod
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A Method of Calculating Autogenous/Semi
D 2012 A method of calculating autogenous/semiautogenous grinding mill specific energies using a combination of bond work indices and Julius Kruttschnitt parameters then applying efficiency factors in Proceedings 11th AusIMM Mill Operators' Conference pp 3744 (The Australasian Institute of Mining and Metallurgy: Melbourne)
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Multi
Rod mills generate small amounts of fines as fine particles typically accumulate in the space between rods without enduring comminution [2] Effective grinding of this material occurs in the ball mill compartment generating finer fragmentation The Bond Rod Mill Work Index (BRMWI) test was only possible for Blend 5 (Table 2) due to excessive
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Simulating the Bond rod mill grindability test Minerals
Simulating the Bond rod mill grindability test Simulating the Bond rod mill grindability test Tavares Lus Marcelo de Carvalho Rodrigo M Guerrero Juan Carlos 20120101 00:00:00 Graphical abstract A procedure based on the simulation of batch grinding allowed predicting the Bond rod mill work index of ores within no more than 10% of deviation in comparison to the
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17 July 2019 METALLURGICAL TESTWORK PROGRAM YIELDS
o Full Comminution suite testing including SMC Bond Crushing Work Index Bond Rod Mill Work Index Bond Ball Mill Work Index Bond Abrasion Index Unconfined Compressive Strength o Variability flotation testing on a range of samples to understand the likely range of metallurgical behaviours that would be expected
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Bond Tests
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 closedcircuit dry grindability test performed in a standard rod mill
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Bond Index Tester BT 100 XL moduli a sfere e a barre
Il Rod Mill Work Index (RWI) viene utilizzato per la classificazione granulometrica in un range dimensionale tra 25 mm e 2 1 mm mentre il Ball Mill Work Index (BWI) viene utilizzato per la classificazione granulometrica in un range dimensionale tra 2 1 mm e 100 m Setting dei parametri di Macinazione :
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Testwork: Bond rod mill work index
The Bond rod mill work index is not as common as the Bond ball mill work index and there are two different variations on the mill apparatus The SAGMILLING COM models expect a mill with a wave liner and is not compatible with mills using smooth liners
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rod mill for crush rocks
Relation of Bond rod mill work index and crushing work index Similar to the ball mill work index the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms Unlike the ball mill work index the size of the feed to a rod mill test
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Geometallurgy
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 [18] The SPI(R) value is known not to be an additive parameter however errors introduced by block kriging are not thought to be significant
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Determination Of The Bond Work Index Using An
Numerically the work index is the energy required in kwh/t to reduce a given material from theoretically infinite feed size to 80% passing 100 microns The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test Bond developed separate tests for the rod mill and the ball mill The
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CORRELATION BETWEEN BOND WORK INDEX AND
The Bond's standard ball mill is used to determine the work index value of differ ent samples 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 m If the breakage characteristics of a material remain constant over all size ranges the calcul ated work
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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 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
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