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Historically (before Bond), in order to be able to size ball mills for new projects, ... their test database, the required kWh per ton for the new mill could be estimated, ... the now familiar "Bond Work Index Test", and the new mill sizing method was... Get Quote (PDF) A Methodology to Estimate Ores Work Index Values, Using ...
A Method of C alculating Autogenous/ SemiAutogenous . using Bond rod mill work index (RMWI), and Bond ball mill work index (BMWI). However, the author has developed a relationship between the Bond third theory SE values and the AG/SAG SE values to enable the additional power required for AG/SAG milling to be determined.
shortcomings, the test was changed to a locked cycle technique as described below. LOCKED CYCLE TESTS . The preferred test procedure is a locked cycle test akin to the Bond Ball mill work . index determination. The first cycle starts with minus 6 mesh ore removed since it is believed that the fines content can fill most of the voids allowing ...
Sep 10, 2013· The Bond work index can be determined by many ways, some of them are as follows: with the traditional standard method in a (1) Bond-ball mill or in a (2) Hardgrove mill with the conversion of the Hardgrove method's result to Bond work index by an empirical formula, (3) with the more work-saving Karra algorithm (compared to the standard Bond ...
from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150,000 t/d, SAG mill sizes varied from 10 ft to 40 ft diameter in multiple SAG mills, and ball mill sizes varied from 7 ft to 27 ft in diameter.
The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for the rod mill and the ball mill. The simplified test method described in this paper, which is used at Anaconda Research Center to approximate the work index, is an alternative procedure to ...
The Bond ball mill grindability test is run in a laboratory until a circulating load of 250% is developed. It provides the Bond Ball Mill Work Index which expresses the resistance of material to ...
A simulated test method for Bond ball mill work index (BWI) was used to perform the comminution test. The results showed BWI values vary from 5.67 kWh/t to 20.21 kWh/t. Examination of the possible correlations between BWI and the geological features
Test Method For Bond Ball Mill Work Index Protable Plant. We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment.
Numerically, the work index is the energy required in kwht to reduce a given material from theoretically infinite feed size to 80 passing 100 micronshe work index of a particular material is determined in the laboratory by conducting the standard bond grindability test bond developed separate tests for the rod mill and the ball mill.
test using ball-race test mill was performed. Knowing the Hardgrove indices, the Bond work indices of some samples were estimated using the Aplan's formula. The approximate work indices were determined by running a batch dry-grinding test using a laboratory ball mill. Finally, the work indices obtained from both methods were compared.
Bond Work Index Procedure and Method. This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge.
Bond Work Index Procedure And Method. This grindability test or bond ball mill work index procedure is used to determine the bond work index of minus six mesh or finer feed ore sampleshese equation.
1. 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 energy required for grinding, and for ball mill ...
•-Association index •Modal mineralogy •Test methods ... Starting from the dimensions of the Bond ball mill a modified test method was ... For the future work these tests will be extended to other ore types in order to investigate the effects of mineralogy and to include mineral liberation in
a simple yet practical alternative for the standard Bond method. Keywords: work index, Bond method, kinetic grinding test, grindability, ball mill Introduction The standard Bond (1952; 1961) method is widely used in the course of design, selection, scale up, energy .
Test Method For Bond Ball Mill Work Inde. The test determines the bond rod mill work index which is used with bonds third theory of comminution to calculate net power requirements when sizing ball millsquick method for bond work the aim of this study.
Bond Index Test Test conducted on a Bond Index testing mill (Bico-Braun, USA) 700ml of sample milled for 100 revolutions. New number of revolutions is calculated to produce fines equal to 1/3.5 of the total charge of the mill. The Bond Work Index W i expresses the resistance of the material to
Improved method using less mass compared to the BBMWi Test Development and Initial Validation Use of Work Index Since its introduction in the 1960s the Bond Ball Mill Work Index (BBMWi) parameter has been extensively used in predicting ball mill power draw. Along with comminution circuit design the work index parameter is widely used in
Bond Work Index Procedure and Method. ... A Bond Ball Mill Work Index test is a standard test for determining the ball mill 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 every Bond Ball Mill Work Index test carried out at JKTech, a standard report is issued. The report details the Bond test procedure method, and presents the results including F80, P80, Grindability and Work Index. Further interpretation of the results is available if required. Frequently Asked Questions - Bond Ball Mill Work Index
This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.
test method for bond ball mill work index. QUICK METHOD FOR BOND WORK . According to the Bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250% circulating load (Bond, 1949, 1952, 1961). The test is performed on a raw material approximately weighing 10 kg ...
The wet ball mill test method has been in use for aggregate quality testing in various forms for a number of years and for a variety of aggregate end-use purposes, . Testing method for ball mills – US Patent 7197952 Description. The Bond ball mill test is designed to predict power in wet ball mill grinding . The first step of the testing ...
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