2016-2-23 · JKTech Laboratory Services Bond Ball Mill Index Test (BRMWI) A Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball Mill Work Index of a sample of ore. The BBMWI is a measure of the resistance of the material to crushing and grinding. It can be used to determine.
2018-2-20 · rod mill work index has not been de ned as yet. The ball ? mill work index is con rmed at 16 kWh/t. The operating ? work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high inef? ciency. This raises the point that, in some cases, the Bond EF4 oversize factor calculation is not suf cient to compensate ?.
May 18, 2013 Ball Mill Critical Speed Working Principle Duration 540. 911 Metallurgy Corp. 223,717 views
2019-8-24 · Application: Energy saving mining ball mill is a key equipment in beneficiation is widely used in ore dressing production line such as Gold ore, Cooper ore, Magnetite ore, Antimony, Calcite, Kaolin, Mica, Clay, Bentonite etc Ferrou metal or Nonferrous metal materials.
It has been recognized that the grindability of an ore in a ball mill is a function of both feed and mill parameters: Work index, W i; Largest particle size and size distribution; Density of solids and slurry Wet Ball Mill Power Draw (Bond) For wet ball mills, Bond expressed power draw as a function of the total mass of media:P↓M / M↓B.
Similar to a Comparative Work Index, this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a set time. It can be used at mesh sizes from 65 to 200 mesh (normally 100 mesh). The test requires calibration against the standard Bond Ball Mill Work Index test to estimate the Work Index.
are the Bond Work Index Wi values Bond, 1952, divided into a low energy crushing work index Wi C for coarse rocks 7550 mm, a rod mill work index Wi RM for intermediate sized particles 253 mm, and a ball mill work index Wi BM for small particles 3 mm Ammtec, 2000. Laboratory
2013-5-6 · 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). The comparison of these results gives context to how the various measurements relate to each.
2015-4-16 · determination of the work index for ball and rod mills in 1952 and modified it in 1961. The standard Bond ball mill grindability test is a closed circuit dry grinding test with a 250% circulating load. The standard procedural outline of the test is stated in (Bond) 1961. The work index for a ball mill, Wi, is then calculated from the following.
Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size; SAG mill design requires an appropriate SAG test, for example, SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample, including the maximum attainable recovery and rate constants for each mineral (Chapter 12). Take care to.
Variability samples must be tested for the relevant metallurgical parameters. Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size SAG mill design requires an appropriate SAG test, for example, SPI Chapter 5.
2013-12-24 · Vol.8, No.9 Alternative Approaches for Determination of Bond Work Index 733 Where H is the Hardgrove index and mH is the mass (in gm) of the particles smaller than 74 μm. The mean of two to three parallel measurements are to be considered.
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2, the operating work index Wio of an existing grinding circuit can be calculated, given known mill power draw, throughput, feed and product size distributions. kWht Power applied per ton of feed to the grinding unit Wi The standard Bond work index of the ore P 80 The 80 cumulative passing size of the product in microns F 80
Bond Ball Mill Work Index Clinker . Jul 31, 2015 a new approach toward estimating the Bond ball mill work index (BBWI) by Keywords: work index, Bond method, kinetic grinding test, grindability, ball mill of different ores and materials such as copper, iron and clinkers.
Procedure for determination of ball Bond work index in the commercial operations. While the BWI has been used extensively on brittle materials 10,28293031 32 3334, limited testing using modified forms of the theory of biomass has been conducted in planetary ball mills 11 and hammer mills 35.
A quick method for the Bond work index approximate value determination, which is based on the first order grinding kinetics, is presented in this paper. It provides the Bond Ball Mill Work.
JKTech Laboratory Services Bond Ball Mill Index Test BRMWI A Bond Ball Mill Index Test BBMWI is a standard test for determining the Ball Mill Work Index of a sample of ore. The BBMWI is a measure of the resistance of the material to crushing and grinding. It can be used to determine
2.4. Bond Work Index (BWI) theory & test. The BWI is determined using a dry grinding test in a standardised testing machine, the Bico Ball Mill at the University of Nottingham. The mill contains 285 steel balls of total weight 20.13 kg with a drum size of 305 mm in diameter by 305 mm in length which rotates at a constant speed of 70RPM.