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).
Ore hardness can be estimated using commercially ... by up to 714% and that the Bond Ball Mill Work Index may be reduced by up to 39% depending on the ore type under investigation ...
JKTech. Laboratory Services, Australia. ... The most commonly used measure is the Bond ball mill work index (BBMWi). ... Underestimation of ball milling feed hardness increases the risk of ball ...
Standard 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 ...
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 ...
samples 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 ...
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 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 ...
The Bond Ball Mill is a small universal laboratory mill used in calculating the grindability of ... (Gbp) is the ball mill grindability. The ball mill work index, Wi (kWh/short ton) is calculated from the following equation (Bond 1961):1 The mill should be cleaned by either blowing air into it or wiping the interior with a cloth and or
project viability is generally more pronounced when treating hard ores than average to soft ores due to the greater impact on capital and ... • the bond ball mill work indices determinations gave ... Principal Consultant, JKTech Pty Ltd, Isles Road, Indooroopilly Qld 4068. Email: 2. General Manager Technical Solutions ...
After 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 ...
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 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
These "errors" in the Bond test are often underappreciated in design, and the results are discussed in the context of implications for mill sizing. Other major factors that drive ball milling efficiency, which are not accounted for by the Bond equation but are strongly evident in the JKTech database, are also presented.
Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done: Add about 500 g of silica sand into the mill containing the ball charge. Seal the mill. Rotate for 20 revolutions to clean. Empty the mill charge and sand into the ball try once grinding is complete. Clean out the mill using a brush. Put the lid on the mill.
A*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
The use of commercially availability of these balls could facilitate the standardisation of the Bond grindability ball mill tests. Results of the Bond Work grindability tests with six pure materials of distinct hardness's (Mohs hardness 3 to ), crystallographically competent (free of intercrystalline contacts and inclusions) and distinct ...
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 when compared with...
The 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
data 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
SMC Data Processing. The results from conducting the SMC Test® are used to determine the dropweight index (DWi) which is a measure of the strength of the rock as well as the comminution indices Mia, 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 ...
SMC/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 ...
DWi and point load index (IS50) making it valuable in Minetomill studies as well. For powerbased calculations the SMC Test® also provides the comminution indices Mia, Mih and Mic,which are routinely reported when a test is carried out (see Table 1 below). In conjunction with the Bond ball mill work index they can be used to
Fred Bond published an article in 1961, which, described the procedure for testing ores for a Bond Ball Index. This parameter is still one of the most demanded tools in the design, evaluation and optimization of ball grinding plants around the world. However, the testing methodology for the Bond Dall Index requires about 10 kg of
GRINDABILITY 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 ...
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 ...
Note 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 ...
The SCSE was developed by extensive modelling over a range of A*b, ta and SG values, using the concept of a 'standard' SAG mill with pebble crusher circuit. 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 ( ...
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The Bond ball mill, rod mill, and impact work indices provide industry recognised standards for the determination of ore "hardness" and "competency". The JKTech Dropweight test also provides a determination of competency and can be combined with the autoabrasion test to provide parameters for circuit modelling using JKSimmet.
Bond'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 ...
associated values reported in the literature for Bond's ball mill work index and is far superio r to those reported for Bond's rod mill and crushi ng work inde x tests ( An go ve and Dunne, 1997)
Equipment 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
Bond 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
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