bond impact crushing work index test uganda

The Pendulum Tester Bond Impact Crushing Work Index Tester Working principle Crushing by impact 76 mm maximum feed size Test repetition At least 10 preferably 20 test runs Adjustable crushing angle Repeatable crushing results Safe twohand operating buttons The Bond Crushing Work Index CWI describes the competency of the ore at larger particle sizes It is used for the

Bond F C “Crushing Tests by Pressure and Impact” Trans AIME Vol 169 1947 pp 5866 Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing ball mills Various correction factors may have to be applied

The Bond lowenergy 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 perspecimen test where individual specimens of prepared rock are handpicked by the test operator and placed into the apparatus

work index of biomass crusher – SZM Bond’s crushing work index of gypsum 34 A sample of granite passing a 75 cm square opening screen was suspended in a Bond’s pendulum test Bond Work Index For Coal In Crusher power calculation of impact coal crusher based on bond work index for crushing Read More

EFFECT OF CORE DIAMETER ON THE BOND IMPACT CRUSHING WORK INDEX TEST ABSTRACT The Bond low energy impact crushing work index test is specified to be performed on rock specimens between 50 mm and 75 mm in effective diameter NQdiameter drill core frequently used in

Relation of Bond rod mill work index and crushing work index Similar to the ball mill work index the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms Unlike the ball mill work index the size of the feed to a rod mill test 10 mm–12 mm is closer to the size of the crushing test

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 If you

See this useful summary Table of Bond Work Index by Minerals 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 to reduce one ton of the ore from a very large size to 100 um The sample was received crushed appropriately for the ball mill test

The 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

rocks were studied and the energies consumed by the crusher were compared to those of the Bond comminution energy estimated from the Bond index There is considerable difference between Bond crushing energy and work done by the jaw crusher for rocks It appears that the Bond approach is not a suitable method for

Abstract The 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 comminution plants designing Determining the Bond work index

index and Bond work index The Bond work index is regarded as one of the crushing resistance it can therefore be presumed that the Bond work index is correlated to the mechanical properties of materials 4 Literature review on impact crusher performance in relation to machine

A clear definition of the required crushing capacities and the desired product quality can be precisely determined by using the Bond Index test methods Using the Bond Index test procedures it is possible to calculate crushing abrasion behavior of mineral samples This knowledge is essential to define the required ball mill layout and

Bond’s approach consists of determining the ore hardness characteristics or Work Index Wi via standardized laboratory testwork The full suite of Bond comminution tests provide the Ball Mill Work Index BWi the Rod Mill Work Index RWi the Crusher Work Index CWi and the Abrasion Index

rocks were studied and the energies consumed by the crusher were compared to those of the Bond comminution energy estimated from the Bond index There is considerable difference between Bond crushing energy and work done by the jaw crusher for rocks It appears that the Bond approach is not a suitable method for

index and Bond work index The Bond work index is regarded as one of the crushing resistance it can therefore be presumed that the Bond work index is correlated to the mechanical properties of materials 4 Literature review on impact crusher performance in relation to machine

This test determines the Bond Rod Mill Work Index which can be used with Bond’s Third Theory of Comminution to calculate net power requirements of sizing rod mills The test is a closedcircuit dry grindability test is run in a standard rod mill and can be performed at sizes ranging from 476 mm to

expressions between Bond index grindability index and friability value have been developed by Ozkahraman 2005 Work Index Work index is defined as the gross energy required in F kilowatthours per ton of feed needed to reduce a very large feed to such a size that 80 of the undersize passes through 100μm screen 8

Bond Rod Work Index Bond Crushability Work Index Bond Abrasion Work Index qJK Tech Testing JK Drop weight Test SAG Milling Comminution Test SMC COMMINUTION PILOT PLANT qAGSAG Pilot Milling Mill dimensions Ø17m x 06m length Typical throughput 05 35 th depending on ore characteristics and circuit Accurate instrumentation for feed rate

Energy requirements for crushing and HPGR options can now be determined in addition to AGSAG mills and with Mic ball mills The results from conducting the SMC Test are used to determine the socalled dropweight index DWi which is a measure of the strength of the rock

by Hazen Research Inc HRI to obtain the JK parameters using the JK Drop Weight Test standard Bond crushing and rod mill work indices abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design SAGDesign Tests patented by Outokumpu See reference 8 below

determination of grindability using Hardgrove method consists in simple test performance Especially for these reasons mutual correlation between the results obtained using Hardgrove method and results of tests by Bond For the calculation of work index Wi from HGI values Bond 1954 proposed by the following formula 88 W i

Thus the test work index value multiplied by the product of the correction factors will provide an estimate of the true plant work index value 342 W i W i TEST × F 1 × F 2 × ⋯ × F 7 × F 8 Factors for condition not applicable should be taken as 1 The Bond work index value changes with the sieve size chosen during a particular test

or impact stress as well as the stress intensity and rate have to be taken into account in the context of test work to certain methods ie The point load test gives the point load strength index Is50 which needs to be corrected to the standard equivalent core diameter De of 50 mm if

Based on a large number of tests Bond introduced a working index or comminution parameter that represents the resistance of the material to crushing and grinding Characterization of rocks for selection of crusher can be done in different ways and the most commonly used is Bond work index Tavares and Carvalho 2007

a test for abrasiveness The following table indicates the abrasiveness of rock based on Bond work index kWht Crushability Los Angeles value crushing applications of impact and compressing crushing These steels has been tailored for various so

1 according to Bond 2 n 05 and according to Charles 3 and Stamboliadis 4 n can take any value near these two In the case that the initial size is infinite and the final size is 100 μm then by definition the required specific energy is called work index W i 100 e W i 2 The value of the constant C in 1 can be calculated