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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 322 bond crushing law and work index.
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844 x 109 gj energy from fossil fuels for a mean energy consumption of 40 gjtonne cement cembureau 2004 additionally 110 kwhtonne cement electrical energy is consumed in cement production raw meal crushinggrinding homogenisation clinker burning and cooling finish milling conveying packing and loading
Learn MoreAug 01 2008 other similar models for energy consumption referred to as kick’s and rittinger’s equations are shown in eqs 1 w bond c bond 1 p 801 f 80 2 w kick c kick ln p 80 f 80 3 w rittinger c ritt 1 p 801 f 80 here w is the energy consumption per tonne of material crushed c bond is the socalled work index of the rock
Learn MoreBond index test test conducted on a bond index testing mill bicobraun usa 700ml of sample milled for 100 revolutions new number of revolutions
Learn MoreBond work index for crushing coal bond work index for crushing coal 11 crushing and classification particles 1 crushing and classification rittinger bond and kick respectivelyittinger 1867 where wi is the bond work index again in energy per unit mass more details how to calculate crusher work
Learn MoreBonds 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
Learn MoreChapter 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 322 bond crushing law and work
Learn MoreCrushing energy consumption coal kick bond index 46 3154 ratings the gulin product line consisting of more than 30 machines sets the standard for our
Learn MoreDetermine the energy required to crush the material from 25 mm to 35 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 with the consumption of energy 130kwkgswhat could be the consumption of energy needed to crush
Learn MoreEfficiency crusher calculate in the crushing section the ore as it comes from the mine is broken down dry to a size suitable for the wet grinding machines these can if necessary be made to take lumps of 2in size but they work much more efficiently if their feed is in or
Learn MoreIi 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 316324 isbn
Learn MoreJul 18 2017 coal still makes up the largest part of chinas energy consumption but beijing has been shutting coal mines and set out plans last year to cut roughly 13 million jobs in the industry the
Learn MoreJun 01 2016 an empirical model of coal comminution energy consumption was proposed in which laws of rittinger kick and bond are notable rittinger 1867 kick 1885 bond 1952 the aim of the present work is to provide experimental data and develop a calculation model on the energysize relationship of coal crushing 2
Learn MoreMetallurgical contentthe two lawswhat about bondrittinger’s lawthe crushingsurface diagram rittinger’s theory and law of the energy expended in crushing of rock is that the work of crushing is proportional to the reduction in diameter or as i have more fully expressed it the work done in crushing is proportional to the surface exposed by the operation or better expressed for
Learn MoreNov 08 2012 bond’s work index is given below the indices derived by kick bond and von rittinger all assume a constant energy requirement per unit of size reduction regardless of the particle size range industrial and laboratory results indicate that the energy required for size reduction increases as the product particle size
Learn MoreSpecification of grindability by hardgrove are applied more frequently hardgrove grindability index hgi is determining factor of energy consumption during grinding the hgi value is used for more detailed coal specification and is significant also for the design of
Learn MoreStrength from an energy consumption viewpoint it is clear that blasting with the intention of decreasing the bond work index wi will produce large energy savings workman and eloranta 2003 in the previous research the specific crushing energy was determined indirectly based on the pendulum or falling weight
Learn MoreThen explosive energy is 473 kwhrlb and blast energy is 426 kwhrlong ton since the measured energy for size reduction from insitu to final product is known the value for the bond work index can be calculated this value is then used to estimate the energy required for each step blasting crushing
Learn More• kick’s constant • di initial diameter of particles • dn final diameter of particles • application for crushing of large particles kick’s theory most useful bond’slaw 1952 • bond’s theory states that the energy used in size reduction is proportional to the new surface diameter of the particle
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