Get Price
Get Price
The Bond Ball Mill Grindability Test is a locked-cycle laboratory grinding test. It provides the Bond Ball Mill Work Index which expresses the resistance of a material to ball milling. This Index is widely used in the mineral industry for comparing the resistance of different materials to ball milling, for estimating the energy required for grinding, and for ball mill scale-up.Mar 01, 2015 This study is part of the Application of Variable Speed Drives in Ball mills and Tower mills project at UBC Norman B. Keevil Institute of Mining Engineering supported by Ingeteam Power Technology, BC Hydro, New Afton Mine, Copper Mountain Mine and Mitacs.
The Bond Ball Mill Work index (BBWi) is the industry standard procedure for assessing the grindability of ores. The test involves conducting a locked-cycle grinding test using ond’s standard mill design. The locked-cycle test enables a batch process to emulate the grinding behaviour of a continuous mill with a 250 recirculating load.
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 mill performance. Due to the age and lack of controls for the test,.
Alsto Bond Index Ball Mill. Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index. This is empirical index determined by closed circuit grindability tests developed by F.C.Bond in the mid 1930’s. It requires a specific 305mm diameter x 305mm.
Jan 03, 2020 The most commonly used test is the Bond ball mill (BBM). It enables the installation of a plant scale ball mill [ 5 ]. The Bond work index test is used to measure the energy required for the desired particle size reduction and for designing new circuits for comminution [ 5 ].
1989). The work index (Wi) is calculated in a laboratory-scale ball mill with Bond equation. The Bond work index has been widely used in designing full-scale mills but the Bond test is rather complex, lengthy susceptible to procedural errors and this is why attempts have been made to abbreviate and simplify Bond test procedure (Weiss, 1985). 2.
Testwork Bond Ball Mill Work Index. The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index . The test is a 'locked-cycle' test where ground product is removed from test cycles and replaced by fresh feed. The test much achieve a steady-state before completion.
Mill Ball Mill Closed circuit crushing to 16 mm Open circuit 8’ dia. rod mill to 1 mm Closed circuit 8’ dia. ball mill to P80 um The ore Test Work Index = Circuit Operating Work Index 9 The Standard Bond Circuit Coarse Ore Bins Fine Ore Bins Screen Crushing Screen Classification Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL WORK.
The results of the laboratory ball mill test were compared to the results of an industrial grinding test, the Bond Work Index, for six samples which covered the grindability range. The two tests compared well with a correlation coefficient greater than 0.9.
![[pdf] Why Is The Bond Ball Mill Grindability Test Done The](/categorypic/ball-mill/23.jpg)
Bond Grindability Test Procedure. Jun 16, 2015 The Bond Ball Mill Grindability test is designed to give a measure of the grinding characteristics of a material by finding the amount of size reduction resulting from a controlled energy input.
Jul 31, 2021 Standard Bond tests showed a reduction in the Bond ball mill work index (w i) of the mineral sample used in this study when using Relo grinding media. The modified Bond test procedure is based on using the standard Bond ball work index test.
The JK Bond Ball Mill (JKBBM) test standardises the equipment specifications and procedures, while satisfying requirements for the original Bond test. Comparative Testing Program During JKTech’s comparative testing program (often called a ‘Round Robin’), thirty-four laboratories conducted the BBMWi test as part of the program.
Grindability Index Test Method Procedure - 911 Metallurgist. The proposed grindability test uses the Bond standard test mill and a quantity called that the orcs concerned do not conform to the Bond Law of Comminution. . required for many crushing and grinding operations. in stages to finer than 6 mesh (3,35 mm), and ground under specified conditions in a laboratory ball mill,.
Dec 09, 2020 The first application is a way to generate a regrind signature plot using the Bond ball mill apparatus. The test procedures are described in Levin, 1989, and many commercial metallurgical.
The Bond ball mill test enables basic grinding power requirement to be determined, from the feed 80 passing size to circuit 80 passing size. The Bond ball mill test is designed to predict power in wet ball mill grinding circuit operating at a 250 circulating load. However, moving away from this condition reduces the accuracy of the test.