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Chapter 3 - Particle Technology (Size Reduction) Kick’s law: the work required for crushing a given mass of material is constant for the same reduction ratio, ... 3.2.2 Bond crushing law and work index.
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bonds crushing law and work index. 20131254 epeat steps 2 and 3 heory and Analysis The minimum energy required for crushing of the sample is smaller than it onds law is often written in terms of the work index
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Bond crushing law and and work index 11 2 Crushing laws where Wi is the Bond Work Index again in energy per unit mass More details Get Price What is bond s law of crushing Answers com Where Kb is a constant that depends on the type of machine and on the material being crushed To use this equation a work index Wi is defined . Read More
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Transcribed image text: Bond crushing law and work index Bond has suggested a law intermediate between Rittinger's and Kick's laws, by putting p= -3/2 in equation 2.1. Thus: E = 20 acਊਣ ਦ) 20/(2)(:-) = 20 (2.5) where: L 9=
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2013-4-29 Influence of Crushing Process Variables on the Product – Our crusher. In many instances rock crushing has considered to be more art than science. One reason for that is . Number of crushing zones and work stroke. . work index (kWh/shortton). W. = . [The law
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2015-6-16 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
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Bond’s Law and Work Index ?? =??? 푝 To use this eqn., a work index W i is defined as the gross energy required (in KW.h/ ton) by feed in order to achieve 80% of the product passes a 100 μm screen. This definition leads to a relation between Bond’s constant
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2020-3-22 The Bond low-energy impact crushing work index (more informally, the Bond crushing work index) is not as common as the Bond ball mill work index, and it is a notoriously noisy test.. The test is a 'per-specimen' test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus.
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2017-3-4 “crushability or grindability”, also cal led work index and the “wear profile”, c alled abrasion index. 4.0 Crushing of rock and minerals : Crushing is the largest
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Engineering; Chemical Engineering; Chemical Engineering questions and answers; Bond crushing law and work index Bond has suggested a law intermediate between Rittinger's and Kick's laws, by putting p= -3/2 in equation 2.1.
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2013-4-29 Influence of Crushing Process Variables on the Product – Our crusher. In many instances rock crushing has considered to be more art than science. One reason for that is . Number of crushing zones and work stroke. . work index (kWh/shortton). W. = . [The law of resistence and its use]. (In German). 37. »More detailed
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MCQs: The work index in Bond’s law for crushing of solids has the following dimensions_____? - Chemical Engineering Mcqs - Mechanical Operations Mcqs for Chemical
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Bond Work Index Formula-Equation. Jan 01, 2016 The impact crushing strength of rocks so determined is used to calculate the Bond crushing work index using the expression (3.9) W i = C × I R e l a t i v e d e n s i t y o f s a m p l e kWh / t where. C = a constant which converts the impact crushing strength, numerically and dimensionally to
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General Crushing Equation By Bonds Law. Bond work index formula-equation - 911metallurgistbasic equationssize distribution and exposure ratioequations for work index variationswork index and crack eneeuropean type jaw crusher v-shaped crushing chamber, tooth-type guard board european type jaw crusher adopts world-class technology and high-end ...
Read More1. Rittinger’s Law: n = 2 . K r is Rittinger’s Constant . 2. Kick’s Law: n = 1 . K k is Kick’s Constant . 3. Bond Crushing Law: n = 1.5 . W i is Work index in KWh/ton and D in mm . Example 4: Calculate the Power required to crush 50 ton/h of coke given the following data: W i = 115.13 KWh/ton Feed particle diameter = 50 mm Product ...
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Exercise 1(a) 1) A material consisting originally of 25 mm particle is crushed to an average size of 7 mm and requires 20KJ/kg for this size reduction. Determine the energy required to crush the material from 25 mm to 3.5 mm. Assuming: a) Ritttingers law b) Kicks law c) Bond law 2) A material is crushed in a blake jaw crusher such that the average size of particle is reduced from 50 mm to 10mm ...
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2019-9-21 Bond crushing law(1952) and work index (intermediate relationship with P = -3/2 = -1.5) The work required to form particles of size Dp from very large feed is proportional to the square root of the surface-to-volume ratio of the product, sp/vp. 12 11 2 LL CE qL EE i
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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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2016-1-1 Bond’s crushing work index of gypsum. 3.4. A sample of granite passing a 7.5 cm square opening screen was suspended in a Bond’s pendulum test. The length of the pendulum was 413 mm and the mass of hammers is 13.6 kg each. The sample was completely crushed when the initial position of the pendulums made an angle of 30° with the vertical.
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The work index in Bond's law for crushing of solids has the following dimensions a) No units (dimensionless) b) KWh/ton c) KW/ton d) KWh.m 1/2 /ton
Read MoreMCQs: The work index in Bond’s law for crushing of solids has the following dimensions_____? - Chemical Engineering Mcqs - Mechanical Operations Mcqs for Chemical
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2021-4-16 The work index in Bond’s law for crushing of solids has the following dimensions_____? A. No units (dimensionless) B. kWh/ton C. kW/ton D. kWh.m1/2/ton. Share. Tweet. WhatsApp. Share. Pin. Mcq Added by: admin. Mechanical Operations Mechanical Operations. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG.
Read MoreGeneral Crushing Equation By Bonds Law. Bond work index formula-equation - 911metallurgistbasic equationssize distribution and exposure ratioequations for work index variationswork index and crack eneeuropean type jaw crusher v-shaped crushing chamber, tooth-type guard board european type jaw crusher adopts world-class technology and high-end ...
Read MoreExercise 1(a) 1) A material consisting originally of 25 mm particle is crushed to an average size of 7 mm and requires 20KJ/kg for this size reduction. Determine the energy required to crush the material from 25 mm to 3.5 mm. Assuming: a) Ritttingers law b) Kicks law c) Bond law 2) A material is crushed in a blake jaw crusher such that the average size of particle is reduced from 50 mm to 10mm ...
Read More2019-9-21 Bond crushing law(1952) and work index (intermediate relationship with P = -3/2 = -1.5) The work required to form particles of size Dp from very large feed is proportional to the square root of the surface-to-volume ratio of the product, sp/vp. 12 11 2 LL CE qL EE i
Read MoreThe 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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2015-7-1 rently crushing some corundum (Bond Work Index = 28kWh/t at 400µm, compressive strength up to 700MPa). Some tests have been performed on martensitic steel balls or hard hematite iron ore as well. The eccentricity (r) is also fixed by the design of the range of equipment. The speed (ω) can be changed online with the frequency in-
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2018-11-15 WORK INDEX •Work Index, Wi, is the gross energy requirement in kilowatt hour per ton of feed (kWh/ton of feed) to reduce a very large particle to such a size that 80% of the product will pass through a 10micrometer, or 0.1 mm screen. •If Dp is in mm, 𝑊𝑖=𝐾 1 𝐷𝑝𝑝 𝐾 = 0.1𝑊𝑖=0.3162𝑊𝑖 I =0.3162𝑊𝑖 1
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2012-8-15 ii PUBLICATIONS This thesis contains the following papers. Paper A: Lee, E. and Evertsson, C. M., Yield and Energy Optimizations of Compressive Crushing, Proceedings of the XXIV International Mineral Processing Congress (partly peer reviewed), Volume 1, pp 316-324, ISBN: 978-7-03-022711-9,
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