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The Bond rod mill work index is not as common as the Bond ball mill work index, and there are two different variations on the mill models expect a mill with a quot;wave linerquot;, and is not compatible with mills using quot;smooth linersquot;.
Apr 27, 2016#0183;#32;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 amp; Maxton and a slightly different apparatus was described by Bergstrom in 1985.
Here is a list presented in table form of Rod Mill Work Index as tested/presented by SME handbook of mineral processing, Weiss Editor, 1985.
Rod mill power is dependent on mill capacity and work index. Mill power increases with: Increasing rod charge; Increasing mill speed; Increasing mill length. Rowland and Kjos (1980) provided an expression to quantify power draw at the pinion shaft per unit mass of rods: P#226;M /
#0183;#32;For comparing the standard Bond rodmill work index and the new modeled method, work index (W i) and produced fine particles in a cycle (G i) for the four samples determined. The performed paired Students t test results indicated that the Standard Deviation for G i and W i obtained by the shortened method are respectively and in respect of traditional Bond method.
bond index for vertical mill grinding . Feb 9, 2014 bond rod mill work index Raymond grinding mill. Precise Process Perfect Products BinQ Mining Equipment Co.,Ltd. Raymond mill,Vertical...
bonds rod mill for work index. Rapid determination of Bond rodmill work index by 2013 01 31#183; The model was validated for four materials showing that it can predict the Bond rod mill work index with deviations below 10 Requiring only 1 5 3kg of sample the procedure is demonstrated to
Jan 01, 2016#0183;#32;W i TEST = laboratory grindability work index. Bond rod mill standard test. Standard conditions for determining the work index of rod mills under laboratory conditions are: mill size = 305 mm (internal diameter) #215; 610 mm (internal length) with wave type lining. material dry mineral. size reduced to lt; 13,200 m
The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing mm (#189; inch, the original test being developed in imperial units) to a product size of approximately 1 mm (in the original and still the standard, 14 mesh; see Chapter 4 for definition of mesh), thus determining the rod mill work index (Wi R or RWi).
The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond. This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills.
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
EF5BM=[ P80+ #215;P80] ( 3 ) The EF4 formula requires both the rod mill and ball mill work index (rod mill Wi is used to calculate the optimal feed size) and because this is a singlestage ball mill calculation, the F80 is actually the rod mill feed size (10,000 #181;m) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 #181;m to ball
The grinding jar for the Bond Index Rod Mill is 12 x 24 in size and has a waveshaped design. At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to mm whereas Ball Mill Work
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 amp; Maxton and a slightly different apparatus was described by Bergstrom in 1985.
Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index (Ai). Over the years, it has been determined that Efficiency Factors (EF1 to EF9) should be applied to Equation 1 to drive the corrected power requirement (Rowland, 1982).
Bond Rod Mill Work Index, RWi, kWh/t Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on profitability. Mill operators have long used operating work indices to evaluate grinding circuit
Bond Rod Mill Grindability Test. Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of material. Closing screen sizes typically range from to 212#181;m. Abrasion Index Test
Figure 5 bond rod mill work index v. unconfined compressive strength 0 100 200 300 400 ucs mpa 5 10 15 20 25 30 35 wirm metric the lack of fit observed relating the crushing work index was expected to carry over to the other bond work indices. figure 5 displays the plot of rod mill work index
Generally, Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research, a simple, fast and accurate procedure is introduced to find the
Dec 12, 2016#0183;#32;The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific
Work Index For Grinding The Limestone. Work index for grinding the limestone limestone bond work index hammer mill mc machinery rod mill limestone grinding mm to mm size wiersmaenzoonnlod mill limestone grinding 10 mm to0 mm size 20 tp h the bond index ball mill rod mill bt 100 xl is used in the planning of in a size range from 25 mm down to 21 mm whereas ball mill work index bwi is used
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