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 performed at sizes ranging from 4.76 mm to …

Bond Work Index Tests. Grinding Solutions offers a range of Bond Work Index Testing from crushability and abrasion to ball and rod mills. For more information on the tests please see below: Bond Low Energy Impact Test. The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index.

Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1, ... • Bond Rod Mill Work Index • Bond Abrasion • Specific Gravity, 2 methods ... Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project ...

The Bond Index Ball Mill / Rod Mill BT 100 XL is used in the planning of ... in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work Index (BWI) is used ... Material feed size*, < 3.35 mm with ball module / 12.50 mm with rod module.

Bond Ball Mill Work Index, BWi, kWh/t 13.4 Bond Rod Mill Work Index, RWi, kWh/t 18.1 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

using Bond rod mill work index (RMWI), and Bond ball mill work index (BMWI). However, the author has developed a relationship between the Bond third theory SE values and the AG/SAG SE values to enable the additional power required for AG/SAG milling to be determined.

Dec 07, 2012· The Titan Bond Work Index Rod Mill is one-piece cast construction with integral wave liners of a form described by Bond. … hardgrove grindability index of limestone.

Comparison of UCS to Bond Work Indices Alex Doll, Alex G Doll Consulting Ltd, Edmonton, Canada Derek Barratt, ... Work Index values (crushing, rod mill and ball mill). Data from 11 mines located around the world is analysed for correlations between UCS and various Wi values.

Tables 3 and 4 accurate method to determine the Bond rod-mill work index. The show the paired t-test results for work indices obtained by Chon- Bond rod-mill work indices obtained by this method were com- gbo and Bingchen method and shortened method, respectively.

The test work index of the feed to a rod mill was 10.1 kWh/t. Eighty percent of the feed passed 2 mm and 80% of the product from the mill passed 40 μm. The mill diameter was 3.9 …

Work Index, which is discussed in the next section. ... as ball and rod mills. Very fine grinding, to sizes less than 10 µm, requires high energy and attrition mills are often used. These have ... 116 Crushing and classification ...

The Bond Ball Mill Work Index can be used in the design calculations and simulations using JKSimMet of a new grinding circuit. A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s).

Rod mills normally carry 35 to 65% rod charge by volume. The limits on charge level are (1) keeping the feed end trunnion open so that feed will get into the mill, and (2) keeping the rod charge low so rods will not work their way into discharge openings where they can cause rod tangling.

The hammers are set to fall again from a higher drop position to input enough energy to break the rock. This is done 10 times to obtain 10 breaks and the WI (kWh/t) = 53.49 x Impact Crushing Strength / Specific Gravity of the sample. ** jktech.com.au Find a referential Rod Mill Work Index Table here.

K B = Bond's work index. d i = initial diameter of particles. ... The opening is closed. The cylinder is rotated at the critical speed of ball mill. The optimum size reduction in a ball mill depends o the following factors: Feed quantity: ... Rod mill: Instead of balls they contains rods, which extends the length of the mill. This rods are ...

A tandem mill is a special type of modern rolling mill where rolling is done in one pass. In a traditional rolling mill rolling is done in several passes, but in tandem mill there are several stands (>=2 stands) and reductions take place successively. The number of stands ranges from 2 to 18.

Jan 02, 2013· Index Test, The Bond Rod Mill Work Index Test and the Bond Ball Mill Work Index test. All of these tests are done in a dry environment and are empirically calibrated … All of these tests are done in a dry environment and are empirically calibrated …

W is the work index measured in a laboratory ball mill (kilowatt-hours per metric or short ton) P 80 is the mill circuit product size in micrometers; F 80 is the mill circuit feed size in micrometers. Rod mill. A rotating drum causes friction and attrition between steel rods and ore particles.

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. The test is a closed-circuit dry grindability test performed in a standard rod mill.

Mineral processing is a major division in the science of Extractive Metallurgy. Extractive metallurgy has been defined as the science and art of extracting metals from their ores, refining them and preparing them for use. ... Rod mills are long cylinders filled with steel rods that grind by compressive forces and abrasion. The length of the ...

–Round and square bars and rods. 9 17 Rolling Mills ... – Three-high: work passes through rolls in both directions – Four-high: backing rolls support smaller work rolls – Cluster mill: multiple backing rolls on smaller rolls ... Classification of Forging Operations

Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index (Ai). Over the years, it has been determined that Efficiency Factors (EF1 to EF9) should be applied to Equation 1 to drive the corrected power requirement (Rowland, 1982).

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.

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.

Bond Rod Mill Index Test. 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 ...

Rod Mill Work Index Table 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. Source 6

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.COM models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners".

Classification 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

• Bond Rod Mill Work Index ... Upper Ore Zone Trench 1 8.3 8.9 3.39 3.39 4.14 7 ... bond's rod mill for work index - India oxide type gold ore bond's rod mill for work index is one of the most commonly used hydraulic,gravel quarry,highway construction production of industrial sand ...

Rapid determination of Bond rod-mill work index by modeling the grinding kinetics. ... 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. ... To calculate Bond rod-mill ...