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Bond Rod Mill Work Index Equipment & Apparatus Review

The middle size class, represented by rod milling, is fitted to a tumbling test, referred to as the Bond rod mill work index (Wi RM, or RWi). The apparatus used to determine this work index was described in 1943 by Bond & Maxton. The author has noted there are some laboratories that have deviated from the apparatus specified by Bond & Maxton and there are modern comminution models

determination of Bond rod-mill work index by

01/01/2013 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.

Commentary on the apparatus of the Bond rod mill work index

rod milling, is fitted to a tumbling test, referred to as the Bond rod mill work index (WiRM, or RWi). The apparatus used to determine this work index was described in 1943 by Bond & Maxton and a slightly different apparatus was described by Bergstrom in 1985.

Bond Work Index an overview ScienceDirect Topics

The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 12.7 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 (WiR or RWi).

Bond Rod Work Index Mill 911Metallurgist

Bond Rod Work Index Mill. 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

Bond Index Ball Mill / Rod Mill BT 100 XL RETSCH

At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work Index (BWI) is used for the range from 2.1 mm down to 100 µm. Adjustment of grinding parameters:

bonds rod mill for work index blackbanqueting.it

bonds rod mill for work index. determination of Bond rod-mill work index by 2013 01 31· The model was validated for four materials showing that it can predict the Bond rod mill work index with deviations below 10 Requiring only 1 5 3kg of sample the procedure is demonstrated to

Comminution testing JKTech University of Queensland

01/04/2020 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

determination of Bond rod-mill work index by

01/01/2013 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

Bond Rod Work Index Mill 911Metallurgist

Bond Rod Work Index Mill. 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, start/stop

Bond Work Index Rod Mill Titan Process Equipment Ltd.

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. Specifications . Size: 12″ x 24″ 40 RPM Charge: 8 rods weighing a total of 33.38 kg. Titan

Bond Work Index Tests Grinding Solutions Ltd

Bond Rod Mill Grindability Test. Grinding Solutions 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 screen sizes typically range from 4.75mm to 212µm. Abrasion Index Test

Bond Index Ball Mill / Rod Mill BT 100 XL RETSCH

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 closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work Index (BWI) is used for the range from 2.1 mm down

20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the

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. 3.KEYWORDS Work Index, Work Index Efficiency, Bond Work Index testing 4.INTRODUCTION AND BACKGROUND The Bond method allows for quantification and com- parison of relative energy efficiencies of most

Comparison of UCS to Bond Work Indices

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 parameters also display no recognisable relationship. FIGURE 6: BOND

Rod Mill an overview ScienceDirect Topics

Bond had used short tons to determine work index. To convert to metric tons the factor 1.1 has been used here, (62 × 1.1 = 68.2). 2. W i conforms to the motor output on an average overflow rod mill of 2.44 m internal diameter, wet grinding in open circuit.

What Can Go Wrong in Comminution Circuit Design?

Bond rod mill work index The Bond rod mill work index (RWi) is used by some prac-titioners to determine specific energy based on empirical methods. JKTech conducts a regular program of testing for each of the laboratories licensed to conduct Drop Weight tests using a standard rock sample. The results of this testing for the Drop Weight Test are discussed in the next section. The test program

A Method of C alculating Autogenous/ Semi-Autogenous

rod mill work index has not been de ned as yet. The ball fi mill work index is con rmed at 16 kWh/t. The operating fi work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high ineffi ciency. This raises the point that, in some cases, the Bond EF4

Bond Work Index Rod Mill Titan Process Equipment Ltd.

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. Specifications . Size: 12″ x 24″ 40 RPM Charge: 8 rods weighing a total of 33.38 kg. Titan

Comparison of UCS to Bond Work Indices

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 parameters also display no recognisable relationship. FIGURE 6: BOND

Rod Mill an overview ScienceDirect Topics

Bond had used short tons to determine work index. To convert to metric tons the factor 1.1 has been used here, (62 × 1.1 = 68.2). 2. W i conforms to the motor output on an average overflow rod mill of 2.44 m internal diameter, wet grinding in open circuit.

A study of simulating the calculation method of the Bond

A new method of simulating the calculation of the Bond rod-mill work index by using the grinding kinetic test data of the feed is proposed. Skip to search form Skip to main content > Semantic Scholar's Logo. Search. Sign In Create Free Account. You are currently offline. Some features of the site may not work correctly. DOI: 10.1016/S0921-8831(08)60681-0; Corpus ID: 98654393. A study of

C O N S U L T I N G L T D TECHNICAL MEMORANDUM

Figure 3: Rod mill for determining Bond rod mill work index So why are there three machines measuring three different versions of the same index? Because the nature of rock breakage changes with size. Coarse rock breakage is dominated by fractures, whereas medium-size rocks break through the rock matrix, and fine-size rocks break along and through mineral grains. To capture these three

A Method of C alculating Autogenous/ Semi-Autogenous

rod mill work index has not been de ned as yet. The ball fi mill work index is con rmed at 16 kWh/t. The operating fi work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high ineffi ciency. This raises the point that, in some cases, the Bond EF4

Comminution AMML

Bond Rod Work Index (BRWi) The sample is staged crushed to 100% passing 12.5 mm. The crushed feed sample is subject to a grinding by a standard rod mill. The BRWi is calculated after achieving a consistent IPP of ~50%. Navigation. Home; About Us; Experience; Our Staff; Services; Contact Us; Services. Flotation; Hydrometallurgy ; Comminution; Analytical & Mineralogy; Particle Size Analysis

Bond Grinding Circuit Efficiency ceecthefuture

Rod Mill Ball Mill Closed circuit crushing to 16 mm Open circuit 8’ dia. rod mill to 1 mm Closed circuit 8’ dia. ball mill to P80 um The ore Test Work Index = Circuit Operating Work Index 9 The Standard Bond Circuit Coarse Ore Bins Fine Ore Bins Screen Crushing Screen Classification Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL WORK INDEX EFFICIENCY DETERMINATIONS! 10. 2/20/2014

Metcom Expertise Metcom Technologies

For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index always means the equivalent amount of energy to reduce one ton of the ore from a very large size to 100 um. Just as the meter is used to measure and compare distances, the 'Work Index' thusly measures and compares energy usage of size reduction processes. The Bond Work Index equation is

Relationships between comminution J energy and product

determination of the work index for ball and rod mills in 1952 and modified it in 1961. The standard Bond ball mill grindability test is a closed circuit dry grinding test with a 250% circulating load. The standard procedural outline of the test is stated in (Bond) 1961. The work index for a ball mill, Wi, is then calculated from the following equation. [7] where P is the closing sieve size