bond rod mill work index

2020-07-18T05:07:58+00:00

determination of Bond rodmill work index by

To calculate Bond rodmill work indices, the four samples were screened and the particle size distributions plotted in Fig 2The 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 Commentary on the apparatus of the Bond rod mill Work Index by Alex Doll December, 2015 alexdoll@sagmilling The Bond “Third Theory” of comminution was originally divided into three size classes reflecting the varieties of comminution Bond Rod Mill Work Index Equipment Apparatus The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 127 mm (½ 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 Bond Work Index an overview ScienceDirect Topics

Testwork: Bond rod mill work index

Bond rod mill work index results from Australian laboratories with smooth liners should not be used in the models The test is a 'lockedcycle' test where ground product is removed from test cycles and replaced by fresh feed The test must achieve a steadystate before completion 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 millsBond Work Index Rod Mill Titan Process Equipment A “Bond” rod mill work index is to be determined in an apparatus with a wave liner The author is aware of four laboratories that offer a rod mill work index test where the lining of the mill is either smooth, or smooth with a small number of primitive lifters that do not constitute a wave liner (one ofCommentary on the apparatus of the Bond rod mill work

determination of Bond rodmill work index by

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 re, a simple, fast and accurate procedure is introduced to find the rodmill work index based on the conventional Bond work indexBond 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 millBond Tests SGS Bond Rod Mill Work Index Measuring 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 Comminution testing JKTech University of

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* Bond F C, “Crushing Tests by Pressure and Impact”, Trans AIME, Vol 169, 1947, pp 5866 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 MoreBond Rod Mill Work Index, RWi, kWh/t 181 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 circuitApplication of Operating Work Indices in Autogenous 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 TheseComparison of UCS to Bond Work Indices

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Bond Rod Mill Work Index Equipment Apparatus Review Mar 31, 2016 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 test at a fixed circulating load The geometry of the grinding chamber is described as: mill inside diameter of 12 inches The Bond rod mill work index is used to calculate the power requirement to grind from ~½” to about 14 mesh The test has been mainly used for the design of rod mills or primary ball mills, but it can also be used along with the other Bond tests (BWI and CWI) for SAG mill designAn Overview Of the SmAllScAle teStS AvAilAble tO 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 'lockedcycle' test where ground product is removed from test cycles and replaced by fresh feedTestwork: Bond ball mill work index

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WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design Specific energy requirement at the drive pinions 3KEYWORDS Work Index, Work Index Efficiency, Bond Work Index The Bond Rod Work Index Test determines the resistance of ore to grinding in a rod mill, expressed as a work index kilo Watthour per ton (kWh/t) The work index is then used to calculate the specific energy requirements for sizing rod mills or determining their throughput for a GeolabsGlobal South Africa ComminutionCommentary on the apparatus of the Bond rod mill work index The Bond "Third Theory" of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond (and his collaborators) were gathering the information to calibrate comminution models : Articles

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The test work will entail industry standard tests such as the Bond Rod Mill Work Index, Bond Ball Mill Work Index, JK/DWi tests and then some specific batch mill tests The results of the test work will then be used to determine the parameters required for Simulation The simulation can then be used to size an entire comminution circuit * Bond F C, “Crushing Tests by Pressure and Impact”, Trans AIME, Vol 169, 1947, pp 5866 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 Morebond mill work index of line hannysofficenlFIGURE 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 TheseComparison of UCS to Bond Work Indices

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The Bond rod mill work index ( Wir ) is measured using Bond´s standard rod mill grindability test, which is conducted in lockedcycle mode to emulate the continuous closedcircuit operation Besides the laborintensive conduct of the test, which typically requires from 5 to 10 cycles for reaching steadystate, it normally requires 8–20Bond Rod Mill Work Index Equipment Apparatus Review Mar 31, 2016 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 test at a fixed circulating load The geometry of the grinding chamber is described as: mill inside diameter of 12 inchesbond rod mill index test,large ball mill for sale LAB/PILOT PLANT EQUIPMENT • LAB/PILOT PLANT EQUIPMENT MILLS Bond Work Index Rod Mill The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by BondLAB/PILOT PLANT EQUIPMENT – MILLS Category Titan

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The Bond Rod Work Index Test determines the resistance of ore to grinding in a rod mill, expressed as a work index kilo Watthour per ton (kWh/t) The work index is then used to calculate the specific energy requirements for sizing rod mills or determining their throughput for a Using the Bond work index to measure operating comminution efficiency CA, 1978, “Determination and use of operating work indices in controlled grinding circuits–A proposed concept,” Mill Operator’s Conference and CA, 1982, “Selection of rod mills, ball mills, pebble mills, and regrind mills,” in Design and Using the Bond work index to measure operating comminution The mill power is = 225 Watts, calculated by (6) Fi P nally the product is wet screened to find the size d80 24 Rod Mill Semi Continuous Process The same mill is used for the semi continuous grinding tests which is similar to the Bond test but with the exist ing mill of known power After time the mill A New Approach to the Calculation of Work Index and