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formula 26 2339 3 s to calculate efficiency of ball mill Home > product > ... Bond Work Index Formula-Equation ... We can calculate the steel charge volume of a ball or rod mill and express it as the % of the volume within the liners that is filled with grinding media. While the mill is stopped, the charge volume can be gotten by measuring the ...
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Bond Rod Mill Work Index Equipment & Apparatus Review
The middle size class, represented by rod milling, is fitted to a tumbling test, referred to as the Bond rod mill work index (Wi RM , or RWi). The apparatus used to determine this work index was described in 1943 by Bond & Maxton.
Testwork: Bond rod mill work index - SAGMILLING.COM
Rod mill work index is used in the SAGMILLING.COM Bond/Barratt specific energy consumption model. The work index is used to calculate the energy requirement to grind rocks in the medium size range, from 10 mm - 20 mm down to about 2 mm.
Bond Work Index - an overview | ScienceDirect Topics
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of …
Bond Rod Mill Index Test | JKTech
The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill. It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions. It is a locked cycle test conducted in closed circuit with a laboratory screen.
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Bond Rod Mill Index Test (BRMWI) A Bond Rod Mill Index Test (BRMWI) is a standard test for determining the Rod Mill Work Index of a sample of ore. The BRMWI is a measure of the resistance of the material to crushing and grinding.
Commentary on the apparatus of the Bond rod mill work index
rod milling, is fitted to a tumbling test, referred to as the Bond rod mill work index (WiRM, or RWi). The apparatus used to determine this work index was described in 1943 by Bond & Maxton and a. slightly different apparatus was described by Bergstrom in 1985.
Comparison of UCS to Bond Work Indices - SAGMILLING.COM
are the Bond Work Index (Wi) values (Bond, 1952), divided into a low energy crushing work index (Wi C) for coarse rocks (75-50 mm), a rod mill work index (Wi RM) for intermediate sized particles (25-3 mm), and a ball mill work index (Wi BM) for small particles (<3 mm) (Ammtec, 2000). Laboratory
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GMSG GUIDELINE: DETERMINING THE BOND EFFICIENCY OF ...
Bond Test WI’s (kWh/t): Rod Mill: Ball Mill: 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod µ
Rod Mill - an overview | ScienceDirect Topics
Jean-Paul Duroudier, in Size Reduction of Divided Solids, 2016. 3.7.4 Performance. Rod mills are used in an open circuit between crushing and the ball mill. They often operate in wet and where the pulp contains up to 50% solid by mass. This machine is equally very applicable to dry where it could take a feed that has achieved 6% moisture.
(PDF) A quick method for bond work index approximate value ...
The Bond work index, Wi, is defined in a Bond ball mill on the samples of standard size − 3.327 + 0 mm.
A New Approach to the Calculation of Work Index and the ...
2.3. Rod Mill Batch Process . The mill dimensions, (D × L), are 0.204 × 0.3 m and it is loaded with 8.55 kg steel rods 14 to 20 mm diameter. The mill rotates on rolls and its frequency is set to 70 RPM corresponding to 85% of the critical frequency. The mill power is = 22.5 Watts, calculated by (6). Fi- P
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Simulating the Bond rod mill grindability test | Request PDF
The Bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling. However, the mass of ore required to conduct the test, which can typically vary from ...
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Feb 26, 2014 · GRINDABILITY TESTS Bond Rod mill work Index • The rod mill work Index is also normally distributed with and average and median of 14.8kWh/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 ...