The Titan Bond Work Index Rod Mill is one-piece 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 …
WhatsApp: +86 18221755073Source 1: Table of materials reported by Fred Bond Source 2: Outokumpu, The science of comminution Source 3: Equipment and pipelines Source 4: Tenova Bateman mills (AG/SAG, Rod, Ball Mill) Source 5: Doering international Source 6: SME handbook of mineral processing, N.L Weiss Editor, NY 1985. Bond Work Index Tester
WhatsApp: +86 18221755073GSL 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 -12.5mm material. Closing …
WhatsApp: +86 18221755073samples and perform the rod mill test on the samples blend. 2.2. Bond Ball Mill (BBM) Standard Test The procedures to carry out the Bond grindability tests in ball mills and rod mills are outlined in Sections 2.2 and 2.3. They are usually referred to as the standard tests, but it
WhatsApp: +86 18221755073The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.
WhatsApp: +86 18221755073The document describes a new method for rapidly determining the Bond rod-mill work index through modeling grinding kinetics and mass balance equations. Experiments were conducted grinding four ore samples in a rod mill with three test sieves to determine the grinding rate constant. The standard Bond work index procedure and the new shortened method were used …
WhatsApp: +86 18221755073The traditional Bond work index proposed by F.C. Bond over 60 years ago is still today a useful tool for characterizing material crushability and grindability in the minerals industry.
WhatsApp: +86 18221755073The 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 apparatus. The SAGMILLING models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners". Most laboratories outside of Australia use the wave liner style of machine – these ...
WhatsApp: +86 18221755073values. If the Bond work index is assumed to be proportional to the batch operating Bond work index, W. =OC:W. ｾ＠ ｾｯ＠ cc'E ( 1 1,-1.o Tõ ｾMｾ＠ where c( proportionality constant E net specific energy provided during the batch test, (kwh/t) ( 3) If A = oe'E 10, the work index can be computed directly from A(-..! lJ -1.
WhatsApp: +86 18221755073It is a well-known fact that the value of the Bond work index (wi) for a given ore varies along with the grinding size. In this study, a variability bysis is carried out with the Bond standard grindability tests on different critical metal …
WhatsApp: +86 18221755073Bond/Rowland rod mill & ball mill specific energy consumption circuit model. Amelunxen SGI SAG and ball mill circuit model. Morrell SMC ... & Trumić (2022) [A new methodology to obtain a corrected Bond ball mill work index valid with …
WhatsApp: +86 18221755073The work index equation for a rod mill test was generated by Fred Bond to empirically predict the operating work index of an industrial rod mill operating in open circuit.
WhatsApp: +86 18221755073MARC manufactures a wide range of laboratory metallurgical ball / rod mills and automated Bond rod / ball mills (with wave liners) to suit most metallurgical laboratory applications. Our range extends from small 6L jar-type mills that are manually positioned on rollers to large 30L size mills.
WhatsApp: +86 18221755073Here is a list presented in table form of Rod Mill Work Index as tested/presented by SME handbook of mineral processing, N.L Weiss Editor, N.Y. 1985. ... Rapid Determination of Bond Rod-mill Work Index by Craig Taylor on Scribd . David June 19, 2015; 7:07 pm;
WhatsApp: +86 18221755073The work index Wi can be determined from plant operations and from laboratory ball mill grindability, rod mill grindability, and impact crushing …
WhatsApp: +86 18221755073Rod mill work index is used in the SAGMILLING Bond/Barratt specific energy consumption model. The work index is used to calculate the energy requirement to grind rocks in the …
WhatsApp: +86 18221755073Rod mill power is dependent on mill capacity and work index. Mill power increases with: Increasing rod charge; ... Bond quantified the rod mill power draw as a function of the Work Index, capacity, and a series of correction factors: PM = Wmtest,i FT Q. FT = F1 F2 F3 F4 F5 F6 .
WhatsApp: +86 18221755073After each batch grind, the contents of the mill are sieved on the selected 'closing' screen to remove the undersize. This is replaced by an equal weight of fresh feed to bring the weight back to that of the original charge.
WhatsApp: +86 18221755073Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond's Third Theory of Comminution, …
WhatsApp: +86 18221755073This 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 …
WhatsApp: +86 18221755073They investigated the variability of the BWI in the Bond ball mill and Bond rod mill to propose a methodology to model this variability. A series of tests were defined to analyse the variations in grindability characteristics for selected ores. ... Josefin, Y.; Doll, A.G. Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes ...
WhatsApp: +86 18221755073Use 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.
WhatsApp: +86 18221755073Using the Bond work index to measure operating comminution efficiency ... "Selection of rod mills, ball mills, pebble mills, and regrind mills," in Design and Installation of Comminution Circuits, Andrew L. Mular and Gerald V. Jergensen, eds., …
WhatsApp: +86 18221755073The Bond Rod Mill Work Index (BRMWI) test was only possible for Blend 5 (Table 2) due to excessive fines in the other blends. The calculated power required for the remaining blends only considered grinding the coarse fraction in the rod compartment. The Bond formula and power model were used to verify the effects of operational variables, hardness
WhatsApp: +86 18221755073• WiBM – The Bond ball mill work index, in metric units. • WiRM – The Bond rod mill work index, in metric units. • WiC – The Bond impact crushing work index, in metric units. • Density – The coarse particle density measured in either the Bond impact crushing work index test …
WhatsApp: +86 18221755073Bond Abrasion Index (Ai) – sufficient mass to produce 4 x 400 g of charges of -19+12.7mm ore. Bond rod mill work index (RWi). Typically, 10-12 kg at the target crush size. Bond ball mill work index (BWi). Between 6-10 kg at the target crush size will suffice depending on the number of cycles. Levin open circuit grindability test.
WhatsApp: +86 18221755073The commonly used grindability tests included in the database are the Bond work indices for ball milling, rod milling and crushing; the drop weight test results A, b, A×b, DWi, Mia, Mic, Mih and ...
WhatsApp: +86 18221755073FIGURE 8: ROD MILL/BALL MILL WORK INDEX RATIO v. UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS (MPa) 0 0.5 1 1.5 2 WiRM/WiBM (metric) Siddall et al (1996) identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore's compentency. Figure 8 plots this ratio versus UCS; no trend is apparent ...
WhatsApp: +86 18221755073EF8 Rod Milling: this allows for changes in mill performance as the rods and mill liners wear from a new charge and liners to a worn-in charge and liners. These Efficiency Factors can be applied to the power per ton as …
WhatsApp: +86 18221755073To calculate Bond rod-mill work indices, the four samples were screened and the particle size distributions plotted in Fig. 2.The 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 rod-mill in different test-sieves. The slopes of all lines in the figures are equal to the k value of Eq.
WhatsApp: +86 18221755073A Bond rod mill work index test (BRMWI) is a standard test for determining the rod mill work index of an ore sample [21]. The BRMWI is a measure of the resistance of the material to crushing and grinding in a rod mill and is used to calculate the grinding power needed for a given material parcel regarding rod mill grinding conditions. Along ...
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