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 ... 1/26/2003 …
Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes Yardin Josefin1*, A.G. Doll2 1. Student /University of British Columbia/ NBK Institute of Mining Engineering, Canada ... SAG Belt Start 2626.5 216.0 1.03 26.6 12.9 SAG Belt Mid 2627.2 212.1 1.05 25.8 12.7 212 GeoMet Composite 2627.2 154.9 0.92 25.1 15.3 SAG Belt …
Here 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 . by David Michaud February 29, 2024 June 19, 2015 Categories Grinding.
The specification for the apparatus to determining a "Bond" rod mill work index is first described in Bond & Maxson (1943). It states that the apparatus is a …
It 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 ores (W, Ta), ranging from coarse grinding (rod mills) to fine grinding (ball mills). The relationship between wi and …
The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side settings (jaw crushers and gyratory crushers) or closed-side settings (cone crushers) for a given product size.P80 = …
An improved method using less mass compared to the Bond Ball Mill Work Index test. The JK Bond Ball Mill (JKBBM) test, is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and material feed size ( passing 3.35 mm) as the Bond Ball Mill Work Index test. The test requires ...
In the Bond ball mill test, the work index is finally obtained. by. w. ... This was done by means of the Bond Ball Mill Standard test [24][25] [26]. In brief, with the aim to simulate closed ...
Ball Mills - Mineral Processing & Metallurgy. Difference Between a Rod Mill and Ball Mill. Rod Mills has a very define and narrow discharge product size range. Feeding a Rod Mill finer rocks will greatly impact its tonnage while not significantly affect its discharge product sizes. The 3.5" diameter rod of a mill, can only grind so fine.
A standard Bond mill (Fig. 1) was designed to perform the work index tests and determine the energy consumption of various s minerals.The mill has a round internal housing at the corners, has no lifters, and is for dry grinding. The inner diameter and the length are 0.305 m, and the ball load is 19.4% of mill volume (equaling a total weight of …
For the purposes of this paper, it is useful to classify three types of work indices: 1. A grindability measurement made in a laboratory work index apparatus, such as a ball …
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: …
The Bond Work Index for Rod Mill is a special equipment for testing Bond rod mill work index. Simple lab test can choose rod mill by power method or judge the effects of …
Bond Index Ball Mill / Rod Mill BT 100 XL - RETSCH. The Bond Index conforming rod charge consists of: 6 rods of 1.25" diameter and 21" length. 2 rods of 1.75" diameter and 21" length. The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a wave-shaped design. At least 15 to 20 kg sample material is required to simulate a ...
Bond Rod Mill Work Index. The standard bond rod mill work index test procedure is firstly to stage crush the feed to pass 12.7 mm, and size a representative sample.the …
The work index equation for a ball mill test was generated by Fred Bond to empirically predict the operating work index of an industrial ball mill (8 ft dia by 8 ft effective grinding length ...
BOND WORK INDEX. The Bond Work Index is a factor that measures the energy consumed in size reduction operation of the ore. The Bond's Work Index equation is: W=WI* (10/√P80 -10/√F80) where. W= the energy input (Work input) per ton, kwh/metric ton. WI= Work Index= specific energy per ton, kwh/metric ton (characterizes the ore)
Using 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., SME, Chapter 23, pp. 393–438.
Source 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 …
The method is also described in Procemin 2022 paper [Secrets of the Bond Ball Mill Grindability Test] Computing Mib from incomplete Ball Mill Work Index data. Use this nomograph to compute an Mib from a ball mill …
bond 26 2339 3bs rod mill for work index - Grind. blog China 26 2339 3bs Hoteltextile Mills. Bond 26 2339 3bs rod mill for work indexpostcatcher.Bond26 2339 3bs rod mill for work index.Bondrod work index mill911 metallurgist.Bondrod index mill, 12" x 24" consisting of a one (1) piece cast shell complete with integral wave, 1 hp 3/60/220.
The coatings were tested in accordance with the standards for this type of refractory A c c e p t e d M a n u s c r i p t materials, 18,19 and with respect to our previous works in this field, 11 ...
The self-grinding work index is an extension of the concept of Bond work index. It generally refers to the work index calculated by using Bond's fracture theory on the principle of ore crushing energy consumption according to the W, F, and P data of a small or semi-industrial or industrial self-grinding test. In this kind of test, McPherson …
Section snippets Theoretical background. The classical methodology to determine W i(B) is based on the grinding kinetics in the Bond ball mill (Smith and Lee, 1998, Ahmadi and Shahsavari, 2009). This study's main calculations are based on Herbst and Fuerstenau, 1968, Herbst and Furstenau, 1973, Herbst and Rajamani, 1982 first …
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 …
Here 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. …
x 3 = P 80 (µm) of final grind M ib = Provided by data from the standard Bond ball work index test using the following equation (Morrell, 2006): ()(( )) 80 ( ) 80 0.295 1 80 80 18.18 ib f p P Gbp p f f f M − = (6) where M ib = fine ore work index (kWh/tonne) P 1 = closing screen size (µm) Gbp = net grams of screen undersize per mill revolution
The Bond work index was calculated based on Eq. (10). 2.2. Methodology. A simplified Principal Component analysis was performed on a database of over 300 Bond ball mill work index tests with F 100 of 3.35 mm and F 80 coarser than 2 mm.
In the paper proposed by García et al. [5], a deep study on the Bond ball-mill and Bond rod-mill standard tests is shown with different ores. The most impacting result of this work is the ...