properties of ores include the Bond ball mill work index and the Bond rod mill work index. These are empirical indices determined by closed circuit grindability tests developed by F.C.Bond in the mid 1930's. They require a specific 305mm diameter x 305mm long (inside dimensions) ...

Rod 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 = …

Semantic Scholar extracted view of "Simulating the Bond rod mill grindability test" by L. M. Tavares et al. ... Rapid determination of Bond rod-mill work index by modeling the grinding kinetics. R. Ahmadi M. Hashemzadehfini M. Parian. Engineering, Materials Science. 2013; 9. …

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

A Bond Ball Mill, 12" x 12" of fabricated construction comes with electric motor and gear reducer drive, digital counter, jogging button to provide positioning of drum for loading and unloading, emergency stop button, 44 ½ lb ball charge, stand and receiving pan. Perform Fred C. Bond's grindability tests with this standard BWI test ball mill.

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 apparatus. The SAGMILLING models …

The Bond method of measurement of the grindability of ores in rod mills and ball mills is long and tedious and requires a standard set of grinding conditions; mill size, ball …

The Bond rod mill work index (Wir) is measured using Bond́s standard rod mill grindability test, which is conducted in locked-cycle mode to emulate the continuous closed-circuit operation. Besides the laborintensive conduct of the test, which typically requires from 5 to 10 cycles for reaching steady-state, it normally requires 8–20 kg of ...

Bond Rod Index Mill, 12" x 24" consisting of a one (1) piece cast shell complete with integral wave, 1 Hp 3/60/220 volt motor/gear reducer drive, support frame which allows …

Although it was developed nearly 50 years ago, Bond's method is still useful for calculating necessary mill sizes and power consumption for ball and rod mills. This paper discusses the basic development of the Bond method, the determination of the efficiency correction factors based on mill dimensions and feed characteristics, and the application of the ...

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 test then involves a series of batch grinds in a standard bond rod mill.a bond rod mill is 0.305m by 0.610m, with wave liners (of a form described by bond), which runs at 40rpm and tilts as described below.

DOI: 10.1016/J.APT.2012.10.003 Corpus ID: 98536523; Rapid determination of Bond rod-mill work index by modeling the grinding kinetics @article{Ahmadi2013RapidDO, title={Rapid determination of Bond rod-mill work index by modeling the grinding kinetics}, author={Rasoul Ahmadi and Mohsen Hashemzadehfini and Mehdi Parian}, …

Rapid Determination of Bond Rod-mill Work Index - Free download as PDF File (.pdf), Text File (.txt) or read online for free. The 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 …

After 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.

Bond Rod Mill 0.305 12.7 Any 1.18 15 10 Locked-cycle Y Y Bond Ball Mill 0.305 3.35 Any 0.149 10 5 Locked-cycle Y Y Mod Bond 0.305 3.35 Any N/A 2 1.2 Batch N Y ... be designed with the rod mill work index, and single-stage ball mills should be with both the rod mill and ball mill indices. This is because it is common

The Frederick C. Bond has several grinding indices (ball, rod, abrasion), one of which has been a significant guide for ball mills. The Bond ball mill work index is an expression of the material's resistance to ground and a measure of the grinding efficiency. ... that the revolutions required in all the Bond Work index mill tests conducted ...

Bond Rod Mill Grindability: requires 25 kg of minus ½ in. material: $1,000. 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 closed-circuit, dry grindability test, is run in a standard rod mill, and can be ...

Bond Rod Index Mill, 12" x 24" consisting of a one (1) piece cast shell complete with integral wave, 1 Hp 3/60/220 volt motor/gear reducer drive, support frame which allows …

The Bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling. However, the mass of ore required to conduct the test, which can typically vary from ...

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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

MARC 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.

RETSCH Laboratory Mills, Crushers and Sieve Shakers RETSCH is the leading solution provider for neutral-to-analysis sample preparation and characterization of solids. Based on a century of experience RETSCH develops size reduction and sieving equipment which is characterized by excellent performance, operating convenience, safety and a long ...

Bond Rod Work Index Test Mill. The laboratory rod mills common in North and South America are all configured to be rocked, and this is believed to be a standard procedure …

Bond's work index is one of the mostly widely used metrics of mineral grindability. In spite of its ubiquity, users ... (WiBM) or a rod mill work index (WiRM) 3. An operating work index (WiO): A measurement of a specific energy consumption and size reduction in an operating plant. 4. A generic work index that represents an intrinsic ore ...

This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the ... 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, …

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 operating production-size rod mills. ... testing to determine the grinding ...

For comparing the standard Bond rod-mill work index and the new modeled method, work index (Wi) and produced fine particles in a cycle (Gi) for the four samples determined. The performed paired Student's t-test results indicated that the Standard Deviation for Gi and Wi obtained by the shortened method are respectively 0.50 and 0.58 in ...

Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod µ mill (circuit) product size of 1,000 µm. W1 = 9.5 x [(10 / √ 1,000) – (10 / √ 19,300)] = 2.32 kWh/t

Tavares et al. (2012) and Ahmadi et al. (2013) then used this same model and a batch test as an alternative to the standard Bond rod mill test to estimate the Bond rod work index. Grandy and ...

Bond/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 non-standard feed size] may be applied. The method is also described in Procemin 2022 paper ...

The rod mill feeds a wet ball mill at a feed size of 1.0 mm (1000 μm) and produces a product with 80% passing a 150 μm screen. The rod mill is in an open grinding circuit. Determine: 1. the shaft power of the rod mill, 2. the size of the industrial mill. Data: Laboratory Standard Bond Test: Rod Mill: Grindability index at 10 mesh = 13.5 kWh/t ...

The work index Wi can be determined from plant operations and from laboratory ball mill grindability, rod mill grindability, and impact crushing tests. The laboratory test results are used to check the efficiency of commercial operations and to compute the proper machine sizes for new installations.

Bond Rod Index Mill, 12" x 24" consisting of a one (1) piece cast shell complete with integral wave, 1 Hp 3/60/220 volt motor/gear reducer drive, support frame which allows the mill to tilt +/- 5 degrees during operation and 45 degrees for discharge (manual operation), receiving pan, rod charge and control panel complete with digital revolution counter, …

The Bond rod-mill work index is used in conjunction with Bond's third theory of comminution to merely calculate net energy requirements for sizing rod-mills. This test was originally developed in the mid 1930s by F.C. Bond. Though, it was altered in succeeding years, it has essentially remained unchanged since 1961 [1]. ...

The three tests are: The Bond ball mill work index (Wi BM, or BWi) conducted from a feed size of approximately 2 mm to a product size on the order of 100 µm. The Bond rod mill …

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 circuit with a laboratory ...

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 density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum …

Bond Work Index Test Ball Mill. US$ 14,500. The FC Bond Work Index Test Ball Mill was designed by F. C. Bond for use in determining the Bond Index, a measure of …

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.