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Use this online formula to calculate a Ball Mill, Rod Mill or SAG Mill Operating Work Index. Based on Fred Bond''s work you can estimate the energy used into your grinding circuit. This is the most accurate and informative method, but much of the data necessary for its application is not yet available.
that the Bond CWi and the standard Bond BM Wi both recorded average values of 8 kWh/t, it was surprising that the Bond Rod Mill Wi average was kWh/t. Since the ore is unusually soft, the Rod Mill Wi is probably irrelevant in determining required power for the SAG mill. Drop Weight Tests
A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s). Sample Requirements: A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus mm, as required for the Bond Ball Mill Work Index test feed.
Bond Rod Mill Index Test | JKTechBond Rod Mill Index TestMeasuring ore grindability in rod mills. 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 ...
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 (Wi RM) versus UCS. These
This test determines the Bond Rod Mill Work Index, which can be used with Bond''s Third Theory of Comminution to calculate net power requirements of sizing rod mills. The test is a closedcircuit, dry grindability test, is run in a standard rod mill, and can be performed at sizes ranging from mm to .
Bond s rod mill for work. Bond rod mill work index equipment apparatus review the specification for the apparatus to determining a bond rod mill work index is first described in bond maxton 1943 it states that the apparatus is a tumbling rod mill to be operated in a locked cycle.
The test work involved Bond ball mill testing, rod milling, low intensity magnetic separation (LIMS), and batch ball milling down to product sizes of around P80~25 microns. A total of 18 Bond tests and over 150 batch grinding tests and sieve sizing were carried out.
Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond''s Third Theory of Comminution to calculate net power requirements when sizing ball mills* Various correction factors may have to be applied The test is a closedcircuit dry grindability test performed in a standard rod mill
Relation of Bond rod mill work index and crushing work index. Similar to the ball mill work index, the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms. Unlike the ball mill work index, the size of the feed to a rod mill test (10 mm–12 mm) is closer to the size of the crushing test.
Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond''s Third Theory of Comminution to calculate net power requirements when sizing ball mills*. Various correction factors may have to be applied. The test is a closedcircuit dry grindability test performed in a standard rod mill.
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The Bond rodmill work index is used in conjunction with Bond''s third theory of comminution to merely calculate net energy requirements for sizing rodmills. This test was originally developed in the mid 1930s by Bond.
Commentary on the apparatus of the Bond rod mill work index Alex Doll, April 27, 2016 The Bond "Third Theory" of comminution was originally divided into three size classes reflecting the
Bond 039 s rod mill for work index index ball mill rod mill grinding jar for the bond index rod mill is x in size and has a waveshaped leasttokg sample material is required to simulate a closed grinding circuit in a ball or rod mill.
Aug 10, 2016· The Bond Rod Mill Work Index (RWI) is used in conjunction with Bond''s Third Theory of Comminution to calculate net energy requirements for sizing rod mills. The test is conducted in a 305 mm diameter by 610 mm long (inside dimensions) horizontal axis mill.
To calculate Bond rodmill work indices, the four samples were screened and the particle size distributions plotted in Fig. plot was used to find F 80 of the samples for calculations. Fig. 3, Fig. 4 show the grinding kinetics of Pb, Cu, Fe, and Mn ores in the Bond rodmill in different testsieves. The slopes of all lines in the figures are equal to the k value of Eq.
work index covering grinding of fine particles is labelled M ib (Morrell, 2008). M ia values are provided as a standard output from a SMC Test® (Morrell, 2004a) whilst M ib values can be determined using the data generated by a conventional Bond ball mill work index test (M ib is NOT the Bond ball work index). M ic and M ih values are also ...
2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up (Bond''s Law)Data: zBond work index w i zFeed D f and product d size (both 80% cumulative passing) Result: The specific grinding energy w Mill power draw P = wT, where T the mill capacity Mill dimensions (from Tables or charts)
The heavier rods acting upon the lifters and liners result in greater wear on the mill liners. Rod mills normally carry 35 to 65% rod charge by volume. The limits on charge level are (1) keeping the feed end trunnion open so that feed will get into the mill, and (2) keeping the rod charge low so rods will not work their way into discharge ...
Procedure for determination of ball Bond work index in the commercial operations 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 .
Bond''s approach consists of determining the ore hardness characteristics, or Work Index (Wi) via standardized laboratory testwork. The full suite of Bond comminution tests provide the Ball Mill Work Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index (Ai).
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.
bond''s rod mill for work indexMine EquipmentsTraining ModulesMetcom Technologies To determine mill power draw characteristics and capabilities for rod, ball and AG /SAG mills. ... rod mill, hydraulic hammermill for sale malaysia portable rock hammer mills Hammer Mills .
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