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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 kWht required to grind to that size Magdalinovic measured the Bond work index of three ore types using different test screen sizes
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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 kWht required to grind to that size Magdalinovic measured the Bond work index of three ore types using different test screen sizes
Bond Work Index an overview ScienceDirect Topics 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 kWht required to grind to that size Magdalinovic 38 measured the Bond work index of three ore types using different test screen
This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples These equation application methods are used to process 12″ ore samples in a Ball Mill using a standard ball charge Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory
The present work seeks to establish a relationship between Bonds work index W i indexes n uniformity constant and K rate constant from the theory of grinding kinetics so that by collecting and analyzing only bygone data a decision could be taken out about the size of the mill
The Work Index is found from the second stage of the wet open circuit grinding tests1 by multiplying the grinding index II w by 00022 and from the second stage of the dry open circuit grinding tests by multiplying the dry grinding index IId by 000147
The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits The test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm Any screen size below 600µm can be used for the testwork depending on your requirements
The present work seeks to establish a relationship between Bonds work index W i indexes n uniformity constant and K rate constant from the theory of grinding kinetics so that by collecting and analyzing only bygone data a decision could be taken out about the size of the mill
Jan 01 2016 · Use of the Bond Work Index to size industrial grinding equipment was widely known Bond also described its application for measuring grinding circuit efficiency Bond Work Index efficiency has been widely used by industry but until now without concise standard methods or a formal guideline for doing so
The Bond Index conforming rod charge consists of 6 rods of 125“ diameter and 21“ length 2 rods of 175“ diameter and 21“ length The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a waveshaped design At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill
GMSG Publishes the Bond Guideline for Industrial Grinding Circuit Efficiency Although widely known as a tool for sizing and selection of crushing and grinding equipment use of the Bond Work Index Equation as a tool to measure grinding efficiency is less widely known and used Bond specified the specific energy W in kWht that should be
Grindability Index Test Method Procedure 911Metallurgist The proposed grindability test uses the Bond standard test mill and a Energy required For grinding comparison of plant data estimates based on the Bond Work size to another it can be expressed in different ways the best known being the in a laboratory hatch ball mill and the times required for each material to be
Mill grinding Wikipedia W is the work index measured in a laboratory ball mill kilowatthours per metric or short ton P 80 is the mill circuit product size in micrometers F 80 is the mill circuit feed size in micrometers Rod mill A rotating drum causes friction and attrition between steel rods and ore particles
351 Effect of the test screen size on work index 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 kWht required to grind to that size Magdalinovic measured the Bond work index of three ore types using different test screen
Standard size ranges and the related Bond work indexes Feed size F 80 μm Product size P 80 μm Work index 100000 10000 crushing CWI 10000 2100 rod milling RWI 2100 100 ball milling BWI Fig 1 Laboratory equipment used by RIVS for determining the Bond work indexes a