Bond ball mill w ork index test is used to ca lculate the work index rel ated to fine grinding ... Bond ball mill work index kWh/t . Ball volume (nominal design) ... (JKTech, 2007) and in ...
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 ...
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)
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
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 present study investigates the propensity of predicting ore grindability characteristics and varying pulp densities through acoustic measurements on the Magotteaux ball mill. Specifically, the grinding behaviour of two different mill feeds (model quartz and iron ore) together with solid loadings (50, 57, and 67 wt% solids) were correlated ...
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.
The standard Bond ball mill work index test is conducted under dry milling conditions. For ores with Bond work indexes greater than 12 kWh/t, dry locked cycle tests are suitable as they have low difference in hardness between wet and dry milling.
The hardness values show correlation to unconfined compressive strength. The evaluation of the different rock mechanical tests with respect to the criteria defined in Section 2 is summarized in Table 1. ... that can be correlated to Axb and to the Bond ball mill work index (compare Section ), respectively.
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 ...
different 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
Bond ball mill work index (BBMWI) test is a standard test used to measure the ball mill work, which is calculated in accordance with the procedure proposed by the Bond [21]. ... where BWi= Bond work index, X 1 = Rockwell hardness value, X 2 = abrasion value (gm/cm 2), X 3 = compressive strength (MPa), and X 4 = modulus of elasticity (GPa ...
A Bond laboratory ball mill work index test was conducted using a closing screen of 150 m which gave a P80 of 108 m. A calculation is required to be carried out to estimate the specific energy ...
Several authors have developed simplified tests to predict ball mill's energy consumption, typically using the Bond Ball Mill Work Index (BBMWI) as a reference. One option requiring less mass is the Hardgrove mill, traditionally used in the laboratory to determine the energy required to grind coal in roller mills.
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 ...
Test details The JKBBM test requires less material compared to the original test. JKTech recommends 5 kg for test work, compared to 10 kg for the original test.
JK Bond Ball Mill Test; Our flotation ore characterisation test is the JKTech Floatability Index (JKFi) Test. JK Drop Weight Test and SMC Tests® are licenced to 48 metallurgical laboratories globally. To date, over 55,000 JKTech accredited A x b tests have been completed across more than 32 different commodities.
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)
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).
Bond Abrasion Index (Ai) conducted upon charges of 19+ ore via a rotating impeller incorporating a Bisalloy of 500 Brinell hardness steel paddle within a contrarotating drum. Bond rod mill work index (RWi). Traditional dry grinding lock cycle test in a rod mill conducted on ore charges crushed to P 100 mm. Bond ball mill work index ...
JKTech Testing Software 2017 FINAL 091117 (Web) Free download as PDF File (.pdf), Text File (.txt) or read online for free. JK Drop weight test
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 ( ...
work 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.
Introduction. 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 ...
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 ...
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 ...
Bond Ball Mill Work Hardness Jktech. Jk Bond Ball Mill Test Jktech. JK Bond Ball Mill Test Since its introduction in the 1960s, the Bond Ball Mill Work Index (BBMWi) parameter has been extensively used in predicting ball mill power draw. Use of Work Index Along with comminution circuit design the work index parameter is widely used in tracking ...
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An 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 ...
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