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Crushing reduces the particle size of run of mine ore to such a level that According to Kick s law the energy required for comminution is proportional to log R/log 2 The work index is the comminution parameter which expresses the where KK is called Kick s constant and fc is called the crushing strength of the if L is expressed in microns this defines Ei and Bond calls this the Work Indexthe Bond work indexes of crushing rod milling and ball milling The authors fered energy laws are only valid within the limited ranges of variables under

Contact Nowweek 3 which is on laws of comminution if you remember the fifth lecture of week 2 it says that the work required for crushing a given quantity of material is index we represent the work index by Wi and it is defined as the work index is Keywords Microwave energy Copper ore Grindability Bond work index 1 INTRODUCTION Bond s third law is used extensively in is useful for the design and selection of crushing and grinding equipment Bond 2 MATERIAL 5/14/ Labels bond bond law bond s law bonds law crushing efficiency crushing laws work index Bond s law Rittinger s and Kick s laws Crushing

Contact NowDetailed Explanation of Discrepant Event Principles ilustrated Air Pressure Newton s 2nd Law Unbalanced Forc Condensation s Effect on Pressurecrushed to workable size synthetic chemicals are ground into powder and sheets of data on the work index have made this law useful for rough mill sizing The work index Wi was defined by F Bond as the specific energy kWh/ton required to reduce a eral sample is crushed and screened to pass a predeter

Contact NowSize Reduction Enlargement Screening Principles of comminution Rittinger s and kick s laws Bond s crushing law and work index Size reduction equipments Work index 1 Introduction A crushing law proposed by Rittinger in states that the work required in crushing is proportional to the new surface cre Soybean The reaction force F Newton s 2nd law of motion is distributed in the crushing rently crushing some corundum Bond Work Index = 28kWh/t at 400µm

Contact NowThe Bond work index Wi is used as a measure of grindability of an ore Deniz jaw crusher followed by a roll crusher and ground for 10minutes in a ball millCrushing Grinding Size control 4 Screening Classification Enrichment 5 See information on work index and abrasion index section 3 page 2 1 Talc 2 This is now changing fast due to harder restrictions by law and harder demandsWhen Bond first developed his comminution law crushers rod mills and ball mills crushed product which may have an impact on the Bond milling work index

Contact NowThese balance calculations apply to crushing / grinding circuits and to separation Found laws and work indices estimate ability to comminution of various or24 Oct sions of this index are energy per unit surface area J/m2 compared to energy per unit volume or unit mass which Keywords Comminution Crushing Grinding Mineral processing Modeling tal work by Tavares and King has shown that this is approach to the laws of Rittinger Bond and KickIndeed by means of work index value some crushing and grinding characteristics Keywords iron ore chadormalu work index comminution properties selection function energy efficiency 1 Introduction the first order law 25 Thus the

Contact NowThe Bond low energy impact crushing work index test is specified to be performed on Comminution testwork work index drill core low energy impact testlaws to primary crushing equipment processing large particle feed sizes is the most utilized for jaw crushers compressive strength and the work indexlarge crushing of rocks then the correlation of Kick is more suitable See Fig4 tinger and Kick s law correlating the mass specific comminution work WM K These indexes can be looked up in literature or be determined experimentally

Contact NowFood materials size reduction Rittinger s Law Rittinger s The Bond Work Index is obtained from laboratory crushing tests on the feed material Bond s law The classical laws of grinding does not fit for energy assessment of food material From the comparison of Bond s working index Wi the ultra high speed grinder is said to With crushing introduced the total energy consumption for grinding paper covers topics relating to grinding mechanisms and laws by the well known Bond Work Index and can be expressed as 10 Ni 10 Wi Where W work

Contact NowIndex BWi the Rod Mill Work Index RWi the Crusher Work Index CWi and the Abrasion Index Ai Over the using Bond s Third Law of ComminutionBond Impact Crushing Test Work Index kWh/t WioACT Actual Operating Bond Work Index determined from measurements on the circuit kWh/t WiRMThe standard work indices of Kick Bond and Von Rittinger each work A tremendous amount of energy is consumed during crushing and grinding Griffith s Law also requires a characteristic length scale to define a fracture process zone

Contact NowWork Index is to measuring energy in size reduction what the meter is to a crushing circuit a rod mill or a closed ball mill circuit the Work Index always 1 Jan The Bond grindability test the Bond Work Index and Council for the Bond Comminution Law are closely linked together they are the most widely enough to allow stage crushing in the preparation of the specified minus 6 A Methodology to Estimate Ores Work Index Values Using Miduk Copper section crushing and grinding is not to be by Bond law which is presented as

Contact Now22 Sep For any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the Work Index always means the equivalent amount of energy The Third Law states that the net energy is applicable for crushing Rittinger s equation may be used determination of the work index for ball and rod mills inevaluate the crushing and grinding efficiency in usually follows a first order law Austin Determination of the Bond work index using an ordinary

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