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.

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.

Sep 10, 2016· 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". ... Bond Work Index Formula …

Bond Work Index Formula-Equation - Mineral Processing & Extractive Metallurgy - Download as PDF File (.pdf), Text File (.txt) or read online. work index. ... Bond Work Index Formula-Equation Previous ... a rod mill, or a closed ball mill circuit, the Work Index always means

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 Rod Mill Work Index is not significantly higher than Bond Ball Mill Work Index and both are not significantly higher than 15 kWh/t; then further SAG mill… Know More rod mill work index classification – …

A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material ... same rod mill as described below. In all cases the min- ... calculated by the formula provided by Stamboltzis [7]. PMN

Here there are given tables from various sources for the Bond work index values of mining materials (ores, industrial minerals and rocks). These work indexes can be used for the determination of tumbling mills (rod, ball mills) power. Thus, the suitable mill dimensions can be effectively determined.

Here there are given tables from various sources for the Bond work index values of mining materials (ores, industrial minerals and rocks). These work indexes can be used for the determination of tumbling mills (rod, ball mills) power.

Bond Work Index Formula-Equation - Mineral Processing & Extractive Metallurgy - Download as PDF File (.pdf), Text File (.txt) or read online. work index. ... Bond Work Index Formula-Equation Previous ... a rod mill, or a closed ball mill circuit, the Work Index always means

A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material ... same rod mill as described below. In all cases the min- ... calculated by the formula provided by Stamboltzis [7]. PMN

Bond Rod Mill Work Index is not significantly higher than Bond Ball Mill Work Index and both are not significantly higher than 15 kWh/t; then further SAG mill… Know More rod mill work index classification – …

The ore ball mill bond work index ranges from 8.5 to 12.5 kW hr/tonne. Stockpiled . calculated using the two product formula, Wills [2]. .. copper, feed soluble copper and …

Dec 12, 2016· 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 ...

SIMULATING THE CALCULATION OF THE BOND ROD-MILL WORK INDEX Afterthe parameterskl , n 1, k' and n' are obtained,the mathematical models of simulating the calculation of the Bond rod-mill work index can be written as follows.In the firstcycle: where C, is the ratio of the circulating load.In the ith cycle (i a 2): with the ending conditions: 150 Table2.

Rod mill work index is used in the SAGMILLING.COM Bond/Barratt specific energy consumption model. The work index is used to calculate the energy requirement to grind rocks in the medium size range, from 10 mm - 20 mm down to about 2 mm.

2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALL-MILL SCALEUP Ball-mill scale up (Bond’s Law)Data: zBond work index w i zFeed D f and product d size (both 80% cumulative passing) Result: The specific grinding energy w Mill power draw P = wT, where T the mill capacity Mill dimensions (from Tables or charts)

8-3 Centrifugal force outward Fc mp& 2 Dm 2 (8.1) & is the angular velocity, mp is the mass of any particle (media or charge) in the mill and Dm is the diameter of the mill inside the liners. Gravitational force Fg mpg (8.2) The particle will remain against the wall if these two forces are in balance ie.

Feb 25, 2017· The EF4 formula requires both the rod mill and ball mill work index rod Calculate Ball Mill Grinding Capacity 911 Metallurgist Mar 17, 2017 The sizing of ball mills and ball milling circuits from laboratory grinding mill sizing and circuit design to engineering students because of the apparent Ore Work Index, kWh net/metric ton Total Plant ...

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). Sample Requirements: A minimum of 10 kg of material crushed to nominally minus 10 mm is preferred.

No 1 rod mill/ball mill circuit was operating very efﬁ ciently when comparing the combined operating work indices for both mills with the rod mill and ball mill laboratory work indices. Note, in Figure. 1, that the rod mill product slope is less than 0.5 due to an extra amount of nes present being ﬁ ﬁ ner than 650 μm.

Bond Rod Mill Index Test | JKTech A Bond RMWI test is a standard test for determining the Rod Mill Work Index of a sample of ore. The BRMWI is a measure of the resistance of the material to ...

Mohsen Hashemzadeh, University of British Columbia, Bond work index is a common method for For comparing the standard Bond rod-mill work index and the Get Price bond rod mill work index modified - sevenstarcricket.co

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.

Word Index Rod Mill. Wet and dry grinding is accomplished with the mill operating locked in the horizontal position. For charging and emptying the mill, it is tilted on its axis.

Feb 13, 2016· DESIGN OF BOND ROD MILL WORK INDEX - . mining equipment bond s work index ball bond s work index ball mill inner liners design by them for the ball mill work index . ... 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 ...

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.

Rod Mill Work Index Table - Mineral Processing & … 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.

Essa's ball and rod mills can be supplied as complying machines with the appropriate barrels and ball or rod charges. As with our standard range of ball and rod mills, the Essa bond index ball mill and bond index rod mill are supplied standard with a barrel and rotating yoke assembly and the electric motor drive mounted on a stand alone bench, funnel and screen.

» twenty three thousand rpm vertical mill where; Bakkie Liners in South Africa. Find Bakkie Liners in South Africa on saYellow … PREMAT : A Pretoria company that Specialises in Mats and Rubber thats also found in Durban ... Pre: formula work index rod mill. Next: ...

standard Bond crushing, and rod mill work indices, abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed, and Standard Autogenous Grinding Design (SAGDesign) Tests, patented by Outokumpu.

Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index ... Barratt (1986) proposed the use of an empirical formula for predicting SAG power involving the use of a combination of Bond work indices over a range of sizes from F 80 to a defined P 80, applying a

A New Approach to the Calculation of Work Index , A New Approach to the Calculation of Work Index , The work index W i was defined by F Bond as the , a laboratory ball mill, a labora- tory rod mill and the .

Feb 01, 2016· Key Words: Work index, Grinding Energy, Rod Mill, Ball Mill, Dilband Iron Ore. WORK INDEX AND GRINDING ENERGY ASSESSMENT OF DILBAND IRON ORE, PAKISTAN measuring the production rate of specific surface area per.

INTRODUCTION The energy consumption for grinding, according to Bond (1961), is deter- mined by the formula: / 10 10 (I) The work index is determined by grinding experiments carried out in a labo- …

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 to observe a difference (sometimes significant) between the rod mill and ball mill index values for a given ore type