In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: AG and SAG mills, Ball mills, Rod mills, Crushers, High Pressure Grinding Rolls (HPGR). ... These values can be used to simulate crushing and grinding circuits using JKTech's simulator ...
WhatsApp: +86 18838072829GRINDABILITY TESTS Bond Rod mill work Index • The rod mill work Index is also normally distributed with and average and median of /t • It is common to observe difference between the ball and rod mill caused by variation in ore hardness • The test has been mainly used for the design of rod mill or primary ball mills. http ...
WhatsApp: +86 18838072829different ores in AG/SAG milling in exactly the same way as the Bond laboratory ball mill work index can be used to compare the relative grindability of different ores in ball milling (Bond, 1961 and Rowland and Kjos, 1980). However the originally reported A and b parameters which match the SCSE will be still be
WhatsApp: +86 18838072829The new test, called JK Bond Ball Lite (JK BBL), is a locked cycle grindability test
conducted using a standard laboratory Bond ball mill with the same steel ball
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
WhatsApp: +86 18838072829GLOBALLY RELIABLE DETERMINATION OF BOND BALL MILL WORK INDEX JK Bond Ball Mill Test The JKBBM test was developed at the Julius Kruttschnitt Mineral Research Centre JKMRC#8230;
WhatsApp: +86 18838072829Bond's rod and ball mill work indices (RWi), (BWi) indicating a measure of the resistance to ball or rod mill grinding (Bond 1961), Drop weight test (DWT) Axb a measure of the resistance of ...
WhatsApp: +86 18838072829Note that products from the SMC Test can be reused for other laboratory tests, such as Bond ball work index testing. STEP 2 ... Mih and Mic. In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: AG and SAG mills, Ball mills, Rod mills, Crushers ...
WhatsApp: +86 18838072829The 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 when compared with...
WhatsApp: +86 18838072829Equipment Testwork JKTech's testing, equipment and laboratory services ensure globally reliable results. JKTech's highly specialised flotation and ore characterisation tools provide cutting edge technology to gain competitive advantage and increase productivity and metal recovery. JK Drop Weight Tester
WhatsApp: +86 18838072829Standard drop weight, SMC, and Bond ball work index tests have been conducted to investigate the comminution circuit of a magnetite ore located in Eastern Hebei, China. In addition, simulations based on JKSimMet and Morrell models have been performed to compare the specific energy consumption of various comminution circuits. According to the desired capacity and the ore communition ...
WhatsApp: +86 18838072829SMC/JK Drop Weight and Bond Ball Mill Work Index tests. ... (SAG/Ball hardness ratio) calculated . ... JKTech Pty Ltd (2012) JKSimMet Version User Manual, JKTech Pty Ltd, Brisbane, Qld ...
WhatsApp: +86 18838072829An addition to reporting A and b valuesThe SAG Circuit Specific Energy (SCSE) For a little over 20 years, the results of JK Drop Weight tests and SMC Tests have been reported in part as A, b and ta parameters. A and b are parameters which describe the response of the ore under test to increasing levels of input energy in single impact breakage. A typical t10 v Ecs curve resulting from a Drop ...
WhatsApp: +86 18838072829samples and perform the rod mill test on the samples blend. Bond Ball Mill (BBM) Standard Test The procedures to carry out the Bond grindability tests in ball mills and rod mills are outlined in They are usually referred to as the standard tests, but it must be highlighted that the procedures haven't been deﬁned by ...
WhatsApp: +86 18838072829Bond Ball Mill Work 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 the grinding power required
for a given throughput for material under ball mill
The Bond Ball Mill Work Index has been widely used for ball mill sizing, and is also utilized in computer simulation. BOND ROD MILL GRINDABILITY TEST The Bond Rod Mill Grindability Test is also performed according to the original Bond procedure. It requires 15 kg of minus ½ mesh material that is preferably prepared at the testing facility. The ...
WhatsApp: +86 18838072829After offering the JK Bond Ball Mill (JKBBM) Test in house for some years, and with over 500 tests performed, JKTech is pleased to announce the JKBBM is now available to be licenced to other commercial laboratories.. Initially developed and validated by researchers at the Julius Kruttschnitt Mineral Research Centre (JKMRC), the JKBBM Test reduces the time, sample (approximately 50%) and cost ...
WhatsApp: +86 18838072829A*b ranged from a very hard 25 to a soft 118, although the majority were between 30 and 55. • Grindability as indicated by the bond ball mill work index (BWi) ranged from 1035 kWh/t, with the majority between 15 and 27 kWh/t. No clear relationships in terms A*b and/or BWi was identified with geological aspects logged from the drill
WhatsApp: +86 18838072829JKTech Testing Software 2017 FINAL 091117 (Web) Free download as PDF File (.pdf), Text File (.txt) or read online for free. JK Drop weight test
WhatsApp: +86 18838072829operating work index) is also presented a product of for each simulation. For Greenfield design of an AG/SAGball mill circuit with JKSimMet, the additional power requirement in the ball mill(s) is determined with the Bond ball mill work index and the phantom cyclone technique. COMMINUTION Trusted Bench Scale and Pilot Scale
WhatsApp: +86 18838072829Introduction. 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 ...
WhatsApp: +86 18838072829work index series (ball mill, rod mill, and MacPherson autogenous) and pilot plant ... Bond Ball Mill Any 10 5 Lockedcycle Y Y Mod Bond Any N/A 2 Batch N Y Table 1 Summary of Grindability Test Procedures ... low ball mill hardness, while low ratios represent friable or coarsegrained ores.
WhatsApp: +86 18838072829data required for the analysis, including hardness characterization data generated from the SMC Test® (see Annex A) and the Bond Ball Mill Test Work Index (WiBM; GMG, 2016a), and the Morrell equations and their application (see Annex B). A worked example is provided in Annex C. 5. SCOPE The Morrell method can be used to predict the specific
WhatsApp: +86 18838072829can 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 provided as a standard output from a SMC Test ® (Morrell, 2009). The general size reduction equation is as follows (Morrell, 2004 b): (( 2 ) (1))4 2 1 f x f x Wi = Mi x − x (1) where
WhatsApp: +86 18838072829Standard Bond ball mill grindability tests and calibrated Mod Bonds, using a closing screen of 270 mesh (53 microns), classified most samples as medium to moderately hard and averaged kWh/t (Mod Bond only). The SPT lockedcycle high pressure indices (HPi) ranged from kWh/t to kWh/t averaging kWh/t.
WhatsApp: +86 18838072829The 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 when compared with other
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WhatsApp: +86 18838072829can 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 provided as a standard output from a SMC Test ® (Morrell, 2009). The general size reduction equation is as follows (Morrell, 2004. b): f x f x 2. 1 i i. 4 2 W M x x. 1 (1) where ...
WhatsApp: +86 18838072829