Rod Mill
Feeding Granularity: ≤25-≤50mm
Production Capacity: 0.62-180TPH
Applied Materials: Quartz, iron ore, copper ore, gold ore, glass, construction waste, cement clinker, etc
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
Feeding Granularity: ≤25-≤50mm
Production Capacity: 0.62-180TPH
Applied Materials: Quartz, iron ore, copper ore, gold ore, glass, construction waste, cement clinker, etc
Production Capacity: 50-800TPH
Application Field: Hydropower, building material, highway, city construction, metallurgy, coal mining and so on.etc.
Applied Materials: Granite, basalt, bank gravel, bauxite, cement clinker, quartz silicon carbide,limestone, river stone, etc.
Feeding Granularity: 0-3mm
Production Capacity: 10-280TPH
Applicable Range: it is suitable for the magnetite, pyrrhotite, roasted ore, ilmenite and other materials smaller than 3mm in wet-type magnetic separation process.
Feeding Size: ≤25-≤30mm
Discharging Size: 0.125- 0.044mm
Production Capacity: 2-176TPH
Capacity: 150-600TPH
Specification: Φ2.5×40~Φ4.8x68m
Configuration: Lime kiln, coal mill, cooling machine, jaw crusher, vibrating feeder, etc.
Feeding Size: 160-240mm
Production Capacity: 40-390TPH
Applied Material: River gravel, limestone, granite, basalt, diabase, andesite, tailings,etc.
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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 closedcircuit dry grindability test performed in a standard rod mill
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The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits The test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm Any screen size below 600µm can be used for the testwork depending on your requirements Bond Rod Mill Grindability Test
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The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm determining the crushing work index Wi C CWi or IWi impact work index The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80 passing 127 mm ½ inch the original test being developed in imperial units to a product size of approximately 1 mm in the original
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The Bond Index conforming rod charge consists of 6 rods of 125“ diameter and 21“ length 2 rods of 175“ 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 mill
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Bond Ball Mill Work Index BWi kWht 134 Bond Rod Mill Work Index RWi kWht 181 Table 1 Example of AGSAG 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
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Commentary on the apparatus of the Bond rod mill Work Index by Alex Doll December 2015 The Bond “Third Theory” of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond and his collaborators were gathering the information to calibrate comminution models The middle
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Bond Test WI’s kWht Rod Mill Ball Mill 95 kWht8 9 kWht Bond Standard Circuit Work Index Assume the rod mill Work Index of 95 applies from the actual rod mill feed sizeof 19300 mµ although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16000 m to a rod µ
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Standard conditions for determining the work index of rod mills under laboratory conditions are mill size 305 mm internal diameter × 610 mm internal length with wave type lining material dry mineral size − reduced to 100 13200 μm quantity − 1250 cm 3 tapped down to give a reproducible bulk density
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Dec 12 2016 · The basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index
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The Bond work index is not solely a material constant but is influenced by the grinding conditions For example the finer the grind size desired the higher is the kWht required to grind to that size Magdalinovic 38 measured the Bond work index of three ore types using different test screen sizes He produced a correlation between the mass of test screen undersize per revolution G and
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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
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Jan 01 2013 · To calculate Bond rodmill work indices the four samples were screened and the particle size distributions plotted in Fig plot was used to find F 80 of the samples for calculations Fig 3 Fig 4 show the grinding kinetics of Pb Cu Fe and Mn ores in the Bond rodmill in different testsieves The slopes of all lines in the figures are equal to the k value of Eq
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Bond rod mill work index results from Australian laboratories with smooth liners should not be used in the models The test is a lockedcycle test where ground product is removed from test cycles and replaced by fresh feed The test must achieve a steadystate before completion
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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 lockedcycle test where ground product is removed from test cycles and replaced by fresh feed
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Dec 12 2016 · The basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index
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Commentary on the apparatus of the Bond rod mill work index The Bond Third Theory of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond and his collaborators were gathering the information to calibrate comminution models
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Bond’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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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 kilowatthours per short ton required to break from infinite size to a product size of 80 passing 100 µm If the breakage characteristics of a material remain constant over all size ranges the calcul ated work
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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 The comparison of these results gives context to how the various measurements relate to each
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To increase its local supply of special steel products Kobelco Millcon Steel Co Ltd is modernizing a wire rod mill in Rayong Thailand with equipment supplied by Primetals Technologies When completed in May 2017 the Thailand mill will supply steel rods for automotive parts Upgrades to the mill include new mill stand gear drives water boxes pinch rolls and laying heads and the latest
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83 Centrifugal force outward Fc mp 2 Dm 2 81 is the angular velocity mp is the mass of any particle media or charge in the mill and Dm is the diameter of the mill inside the liners Gravitational force Fg mpg 82 The particle will remain against the wall if these two forces are in balance ie
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Rock Mechanics ISRM The Bond crushability index uniaxial compressive strength elasticity modulus and dry density of the rocks studied are shown in Table I Generally there are three Bond indices ball rod and crushability The Bond ball and rod indices are determined using standard ball and rod mill respectively and are suitable for
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Inspectorate is well recognized in the mining industry for valueadded input and quality work The Metallurgical Division is fully qualified to complete “bankability” testing and mill design Over the past 19 years our firm has provided this level of service to most of
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