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Review of Alternative Procedures to the Bond Ball Mill Standard
Smith and Lee [12] determined the Bond work index in a standard mill for eight different materials at different openings of a comparative sieve according to the standard Bond test They compared the data obtained by the standard Bond test and the data from the openAMA Style Nikolić V, García GG, CoelloVelázquez AL, MenéndezAguado JM, Trumić M, Trumić MS A Review of Alternative Procedures to the Bond Ball Mill StandardA Review of Alternative Procedures to the Bond Ball Mill MDPI
Performance comparison of stirred media mill and ball
With increasing need for fine and ultrafine grinding, stirred media mills became an alternative for conventional ball mills In this study, samples of bauxite whose chemical2021年7月12日· Over the years, alternative procedures to the Bond grindability test have been proposed aiming to avoid the need for the standard mill or to reduce and simplifyA Review of Alternative Procedures to the Bond Ball Mill Standard
Procedure for determination of ball Bond work index in the
2009年1月1日· A Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore It was developed by Fred Bond in 1952 and modified in 1961 (JKMRC CO, 2006) This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling, for estimating the energy requiredThe modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%) The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating loadA Comparative Study of Energy Efficiency in Tumbling Mills with
Modified Bond Ball Mill Work Index Test 911
Comparative methods, such as that proposed by Berry and Bruce (1966), One of my colleagues mentioned that a recent RFQ requested a modified bond ball mill work index We had suspected that it was some2015年6月6日· 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 <1/2″ ore samples in a Ball Mill using a standard ball charge Below describes in general terms the Bond Work IndexBond Work Index Procedure and Method 911 Metallurgist
Bond standard test alternative procedures | Encyclopedia MDPI
2021年7月22日· 1745 11:13:23 Alternative procedure to the Bond standard test is based on determining the grindability of an unknown ore by comparing it to the grindability behaviour of a reference ore It can be performed in any laboratory ball mill, but it requires a reference sample ore for which wi is knownPeter Amelunxen The Bond ball mill work index test has been used for ore hardness characterization for more than 80 years Nevertheless, the test suffers from significant disadvantages whenBlock diagram of standard Bond test (left) and JK BBL (right
A Review of Alternative Procedures to the Bond Ball Mill
It can be considered a modified procedure of the one proposed by Kapur This sample is ground in a Bond ball mill for an arbitrary number of revolutions (N 1 = 50, 100, or 150 revolutions KH A comparison of data from Bond type simulated closedcircuit and batch type grindability tests Trans Metall Soc AIME 1968, 241, 91–99loG Austin and P Bagga, 1981, "An Analysis of Fine Dry Grinding in Ball Mills: Powder Technology, Vol 28, pp 8390 loGAustin and KBrame, 1983, "AComparison of the Bond Method for Sizing WetTumbling Ball Mills with a SizeMass Balance Simulation Model: PowderTechnology,Vol 34,pp261 274 loGModified Bond method for the evaluation ofcrusher efficiency
Compare and Understand Rod/Ball/ImpactCrushing/Abrasion BOND
2015年11月22日· The Bond ball mill work index (Wi BM, or BWi) conducted from a feed size of approximately 2 mm to a product size on the order of 100 µm The Bond rod mill work index (Wi RM, or RWi) conducted from a feed size of approximately 10 mm to a product size on the order of 1 mm The Bond crushing (impact) work index (Wi C, CWi,2013年8月1日· Grindability Index Test Method & Procedure IsaMills The Levin test appears to be underused for sizing regrind ball mills Examples of the results are shown in Table 6 The requirement of 2030 kg may be a prohibitive factor The Levin test is a modified Bond Ball test, but makes use of finer screen sizes, and finer feed sizingLevin Grindability Index Test Method & Procedure 911 Metallurgist
A Review of Alternative Procedures to the Bond Ball Mill Standard
2021年7月12日· It can be considered a modified procedure of the one proposed by Kapur This sample is ground in a Bond ball mill for an arbitrary number of revolutions (N 1 = 50, 100, or 150 revolutions) KH A comparison of data from Bond type simulated closedcircuit and batch type grindability tests Trans Metall Soc AIME 1968, 年5月1日· A Comparison of Test Procedures for Estimating the Bond Ball Work Index on Zambian/DRC CopperCobalt Ores and Evaluation of Suitability for Use in Geometallurgical Studies Copper Cobalt Africa, incorporating the 8th Southern African Base Metals Conference, Livingstone, Zambia, 68 July, 65–68A new approach to the calculation of bond work index
Testwork: Bond ball mill work index
Bond models, SGI, Morrell Mi The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index The test is a 'lockedcycle' test where ground product is removed from test cycles and replaced by fresh feed The test much achieve a steadystate before completionAn improved method using less mass compared to the Bond Ball Mill Work Index test The JK Bond Ball Mill (JKBBM) test, is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and material feed size (100% passing 335 mm) as the Bond Ball Mill Work Index test The test requiresComminution testing JKTech University of Queensland
A Comparative Study of Energy Efficiency in Tumbling Mills with
The modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%) The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating load2013年7月15日· Bond Ball Mill Any improvement in When Wip and WiF have been calculated for the desired ball or rod mill product size P and feed size F the following modified form of Eq (1) Comparison with the plant operating work index at product size P may show that the coefficients 018 and 014 in the last term of Eq (9)Bond Work Index FormulaEquation 911 Metallurgist
A Comparative Study of Energy Efficiency in Tumbling Mills with
The modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%) The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating load2004年11月1日· 3 Laboratory testsAs the objective of this study was to predict the grinding performance of Cylpebs in a fullscale ball mill, a modelbased procedure for scaleup of ball mill was adopted, which involved laboratory tests using the Bond ball mill, and a set of model parameter scaleup criteria to simulate the steady state performanceComparison of grinding media—Cylpebs versus balls
THE OPTIMAL BALL DIAMETER IN A MILL 911 Metallurgist
Investigations were carried out in a laboratory ball mill having the size of DxL = 160x200 mm with a ribbed inside surface of the drum The mill ball loading was 40% by volume, the rotation rate was equal to 85% of the critical speed Balls were made from steel: S4146, extra high quality, having hardness 62 ± 2 HRC according to RockwellThe ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill (see Figure 310), a question arises as to whether this practice will alter the ball mill work index (BWBond Work Index an overview | ScienceDirect Topics