Mechanical OperationsThe work index in Bond s law for crushing of solids has the following dimensions No units dimensionless KWh/ton KWh m1/2/ton KW/ton No units dimensionless
Get PriceIs crushing a can a chemical change Water boiling melting ice tearing paper freezing water and crushing a can are all examples of physical changes On the other hand chemical changes are a bit different In a chemical change a new substance is formed The chemical change also usually involves heat burning or other interaction with energy
Get Pricechemical engineering Mechanical Operations According to Bond crushing law the work required to form particle of size D from very large feed is where S/V p and S/V f are surface to volume ratio of the product and feed respectively
Get PriceChemical Kinetics 2 Consider the decomposition of N2O5 to give NO2 and O2 2N2O5 g →4NO2 g O2 g The reaction rate law expression relates the rate of a reaction to In order to form products bonds must be broken in the
Get PriceThe Kick and Rittinger laws are special cases of one form and Bonds law is a special case of the other Thus it is possible for Rittinger s and Bond s laws to apply to the same set of data Chemical Engineering Handbook McGraw Hill New York 4th edn 1963 p 8 8 2 F C Bond AIMS Mining Traps 217 1960 139 3 W H Walker W K Lewes W
Get PriceThe work index in Bond s law for crushing of solids has the following dimensions a kW/ton b kWh m1/2/ton c No units dimensionless d kWh/ton The Right answer of this chemical engineering mcqs Mcq Question is
Get PriceAnswer to subject Particle Technology Derive the Rittinger s law Kick s law and Bond crushing law by putting the different v
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Get PriceFind out information about Bond s law A statement that relates the work required for the crushing of solid materials to the product size and surface area and the lengths of cracks formed Explanation of Bond #39s law
Get PriceHome >> Category >> Chemical Engineering Mcqs >> Mechanical Operations Mcqs for Chemical >> The work index in Bond s law for crushing of solids has the following dimensions Previous Next
Get Price38 Base 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 a 50 c 41 b 25 d 75 39 In crushing a certain ore the feed is such that 80 is less than 50 8 mm in size and the product size is such that 80 is less than 6 35 mm The power required is 89 5 kW Based on the Bond equation
Get PriceF C Bond Crushing and Grinding Calculations British Chemical Engineering Vol 6 1961 pp has been cited by the following article TITLE A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material
Get PriceThe aim of mineral processing is to get the mineral from rock or Ore that has good economic value in the market Generally the ability of treating crude material from excavation into mineral
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Get PriceSand Mill Crushing and Pulverising Dispersing and S F Engineering Works is in the field of fabrication of Custom made process plants and machinery required by the Chemical Paint Inks Pharmaceuticals Minerals Food and related Industries for the past two and half decades and has been regularly supplying the same to various industries throughout the country and abroad with their
Get Price11 Crushing and classification Estimates vary but it is generally accepted that of all the energy used in the World something like between 1 and 10 is in comminution i e the processes of crushing grinding milling micronising etc Changing the size of the particles by crushing creates many important industrial products
Get PriceChemical Engineering Bonds Law For Crushing The standard work indices of Kick Bond and Von Rittinger each work Theamount of energy used for size reduction is evident across industries Kalinkovaskaya 1932 were the first researchers to consider the physico chemical Griffith s Law also requires a characteristic length scale to define get price
Get Pricebonds crushing law and work index chemical engineering comparison between bond crushing energy and fracture energy the bond index there is considerable difference between bond crushing energy and work done by the jaw Read more gold ore crushing work index
Get PriceBond postulated that 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 By relation Sp/Vp = 6/ɸsDp from which it follows that P ṁ = Kb Dp 0 5 Where Kb is a constant that depends on the type of machine and on the material being crushed
Get PriceCategory Chemical Engineering Mcqs Published by T Code Scripts MCQs The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity If the half life period of a radioactive substance is one month then
Get PriceCoulson and Richardson s Chemical Engineering Vol 2 Anza Khawaja Download PDF Download Full PDF Package This paper A short summary of this paper 35 Full PDFs related to this paper Read Paper Coulson and Richardson s Chemical Engineering Vol 2
Get PriceKick s law is The energy required for producing analogous changes of configuration of geometrically similar bodies of equal technological state varies as the volumes or weights of these bodies In other words the energy expended is porportional to the volume reduction instead of the diameter reduction
Get PriceBond 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
Get Price1 Size enlargement opposite of size reduction is not a mechanical operation 2 Wear and tear in wet crushing is more than that in dry crushing of materials 3 A dust catcher is simply an enlargement in a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas 4
Get PriceThe 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
Get PriceQuestion is Bond crushing law Options are 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
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Get PriceThe equation for Rittinger s Law can be written as E = K R f c 1/L 21/L 1 Where E=Energy K R =Rittinger s Constant f c =crushing strength of the material L 1 =initial length and L 2 =reduced length Kick s Law states that the energy is proportional to the size reduction ratio The equation for Kick s Law can be written as
Get PriceRittinger 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 this purpose the work done on a given mass of rock is proportional to the reciprocal of the
Get PriceFor the purposes of calculation a mean value of 4 0 mm will be used which agrees with the value obtained by Bond s method For coarse crushing Kick s law may be used as follows Case 1 mean diameter of feed = 45 mm mean diameter of product = 4 mm energy consumption = 13 0 kJ/kg compressive strength = 22 5 N/m2 In equation 2 4 13 0
Get PriceThe 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
Get PriceIn previous publications we have described how the size specific energy SSE can be calculated to predict the energy required to generate new minus 75 µm material However if we want to benchmark the performance of fine grinding where the product can be much finer than 75 µm clearly we require a finer marker size If we do this we also need a way to compare results that
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Get PriceThe 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
Get PriceIn case of weaker bonds the chemical potential energy is high This is why energy is released in the form of heat and light when stronger bonds are formed Thus you must have realized that chemical potential energy refers to the energy stored in a substance owing to the chemical bonds present in it
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Get PriceRittinger s law states that work required in crushing is proportional to the new surface created In other words crushing efficiency is constant and for a given machine and feed material is independent of the sizes of feed and product Rittinger s law is written as P ṁ = Kr 1/Dsb1/Dsa
Get Price6 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 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
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