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These secondary correlations can involve multi-variable regression analysis with other, non-metallurgical, ore parameters and/or domaining by rock type, lithology, alteration, mineralogy, or structural domains. Test work. The following tests are commonly used for geometallurgical modeling: Bond ball mill work index .
Hard Chrome Surfaces: Adhesion, Masking, Grinding, Finishing. ... Adhesion between a chromium layer and the basis metal upon which It is deposited is achieved by a molecular bond. The bond strength is less upon highly alloyed steels and on some non-ferrous metals. However, bond strengths in excess of 35,000 psi are common. ... Hard chrome ...
samples at that time. The A * b results for the Copper Mountain ore samples placed them in the top 5% of all the samples tested to date in terms of ore hardness / competency. Combining the low A * b with the high Bond work index results provided some frame of reference when the hardness of the ores at Copper Mountain were considered.
Developing an abrasion characterisation test for measuring superficial breakage in comminution Carl Masuret BSc(Ed) Stellenbosch, BSc(Eng) Cape Town A thesis submitted for the degree of Master of Philosophy at
This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the other table.
Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project ... (to T80 1.7 mm) and Bond Work Index on SAG ground ore. To data 63 SAGDesign tests have been done and this allowed the Tenke ... Comparison of Ore Hardness Measurements for Grinding Mill .
estimate Bond work index for the sample. Results show that there is indeed a correlation between the two grindability test methods. Using a linear model, an experimental model is presented, where the Mergan mill can be used to approximate the Bond work index for an ore with good correlation.
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 (Ai).
This page is about grinding index iron ore,, Grinding Mill China grindability index, iron ore,, Typical values of Bond ball mill work index for soft oxidised, bond grinding work index for quartz stone - rrcserin This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the, bond grinding work index for .
The Bond's standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work ...
A comparison of wear rates of ball mill grinding media. ... A comparison of wear rates of ball mill grinding media.pdf. ... From Bond abrasion index tests, it is possi- ble to determine a wear ...
The geometry of a mill with conical ends is shown in Figure 8.6. The total volume inside the mill is given by Vm 4 D2 mL 1 2(Lc L) L 1 (Dt/Dm) 3 1 Dt/Dm (8.16) The density of the charge must account for all of the material in the mill including the media which may be steel balls in a ball mill, or large lumps of ore in an
work index covering grinding of fine particles is labelled M ib (Morrell, 2008). M ia values are provided as a standard output from a SMC Test® (Morrell, 2004a) whilst M ib values can be determined using the data generated by a conventional Bond ball mill work index test (M ib is NOT the Bond ball work index). M ic and M ih values are also ...
that permitted charge chrome alloy grades The impact of platinum production from UG2 ore on ferrochrome production in South Africa by L.A. Cramer*, J. Basson†, and L.R. Nelson§ Synopsis South African platinum mines produce the world's majority of platinum metal that is used in autocatalysts and jewellery. As the
The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process.
W is the work index measured in a laboratory ball mill (kilowatt-hours 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.
The Bond Abrasion Index, devised by F.C. Bond in the 1940's, quantifies the abrasivity of an ore. The index can be used to calculate metal wear rates in crushers and ball consumption rates in ball mills.
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 required ...
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 Index Procedure used by a Professional Metallurgical Testing Laboratory.
CALCULATION OF THE REQUIRED SEMIAUTOGENOUS MILL POWER BASED ON THE BOND WORK INDEXES O. I. SKARIN, Senior Researcher, Candidate of Engineering Sciences N. O. TIKHONOV, Head of Subdivision Optimization of ore pretreatment and selection of the ap-propriate equipment is one of the main areas of activity of RIVS Science and Production .
Need to accurately predict future mine and mill production rates requires a knowledge of ore grindability well in advance of when ore are actually mined. Traditional measurements of ore grindability are the Bond Work Index (Wi) values (Bond, 1952), divided into a low energy crushing work index (Wi
a new approach toward estimating the Bond ball mill work index (BBWI) by applying a series of kinetic grinding tests with Bond standard mill. Establishing a series of relationships between grinding parameters and Bond equation parameters, this approach is fast and practical due to eliminating laboratory control
Table I shows the Bond ball mill work index obtained for the ore samples as well as the iron and silica content in concentrate and tail after LIMS. The concentrate weight recovery was in the order of 50–60%. Furthermore it may be observed that the Bond ball mill work indices for the ore (Wi) varies from 14.6 to 20.9 kWh/t.
Bond Ball Mill Index Test. Measuring ore grindability in balls mills. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions. It is a 'locked cycle' test conducted in ...
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