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Consult NowBased on Bonds Crushing Law the power required to crush a • Based on Bond's Crushing Law, the power required to crush a certain material will change by % if the diameter of the product is made smaller by 50%. • In crushing a certain ore, the feed is such 80% is less than 50.8 mm in size and the product size is such that 80% is less than 6

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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 kWh/t 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

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Jul 15, 2013 What is the Bond Work Index Formula-Equation? In case you had forgotten, here is a classic: You can read all the details of this now “Biblical” grinding power requirement calculation formula in Fred Bond’s original paper.. You can also review the step-by-step Bond Work Index Test Procedure I posted here.. See this useful summary Table of Bond Work

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The Bond Equation 5 Circuit Bond Work Index Efficiency (Rowland, 1973) WIeff = Circuit WI OC * Ore WI lab *Corrected for non-standard conditions This value represents the fraction or percentage of the Bond predicted energy (for that ore) that the plant is using. 1 = good 1 = poor The inverse of this ratio can also be used. 6

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The Bond equation can predict the specific energy with acceptable accuracy for ball and rod mills but, as pointed out by Morrell (2004), this law tends to either over-predict, or

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is applicable for crushing, Rittinger’s equation may be used for finer grinding, and Bond’s equation is applicable in the conventional milling range. Hukki postulated that the exponent n in the Equation [1] is not constant; it is dependent on the characteristic dimension of the particle. The revised energy-size equation has the following

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From the energy consumption analysis using Bonds’ equation, it was confirmed that higher energy was consumed by the fabricated hammer mill while crushing granite and dolomite. After all this general deductions, it was confirmed that the standard machine will be good for a specific

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where x f and x p are measured in micrometers and E in kWh/ton, Bond put the constant C B = 5W i, where W i is the Bond Work Index, defined as the gross energy requirement in kWh/ton of feed to reduce a unit mass of material from an infinite particle size to a size such that 80% (i.e., Φ = 2) of the product passing through a 100 m sieve (i.e, x p = 100 m) . The Bond Work Index

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The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial

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Fred Chester Bond Wikipedia. In the 1930s through early 1950s Bond developed a new theory of the 39 Bond Work Index 39 which relates power consumption in crushing and as in quot Rittinger 39 s law quot quot Kick 39 s law quot and quot Bond 39 s law quot are sometimes

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The Bond Work Index is material specific and is obtained from laboratory crushing tests on the feed material. Hard and brittle materials have a work index in the range 4 10 4 − 8 10 4 J/kg. Bond’s law holds reasonably well for a variety of materials undergoing coarse, medium and fine size reduction. (Eq. 14.3a) can also be reduced to

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bond s law for crushing mills - phn-france.eu. bonds equation crushing Newest Crusher Grinding Mill Bond s law definition of Bond s law in the Free Online Encyclopedia A statement that relates the work required for the crushing of solid

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Equation (11.2) is a statement of Kick's Law. It implies that the specific energy required to crush a material, for example from 10cm down to 5cm, is the same as the energy required to crush the same material from 5mm to 2.5 mm. Rittinger, on the other hand, assumed that the energy required for size reduction is directly

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Apr 18 2018 See this useful summary Table of Bond Work Index by Minerals For any The sample was received crushed appropriately for the ball mill test . Work Index Metcom Technologies. It starts with Bond 39 s Work Index equation w1 For example a grinding circuit is processing 450 t h of dry feed with a mill drawing 3 150 kW at the pinion

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Abstract: The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial comminution plants designing. Determining the Bond work index value is quite complicated, time-

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116 Crushing and classification ∝ − 3 i 5/2 i 3 f 5/2 f x x x E giving = − f i 10 10 x x E W i (11.5) where Wi is the Bond Work Index, again in energy per unit mass terms. The index is defined as the energy required to crush from infinite size down to

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Jun 16, 2015 Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond’s Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work represented

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Bond crushing law a) Calls for relatively less energy for the smaller product particles, than does the Rittinger law b) Is less realistic in estimating the power requirements of commercial crushers c) States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product d) States that the work required

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