# bond s rod mill for work index

### A New Approach to the Calculation of Work Index and the

The mill power is = 22.5 Watts calculated by 6 Fi P nally the product is wet screened to find the size d80 2.4 Rod Mill Semi Continuous Process The same mill is used for the semi continuous grinding tests which is similar to the Bond test but with the exist ing mill of known power After time the mill

Get Price### Investigation on Iron Ore Grinding based on Particle Size

May 28 2020 The ore physical grindability characteristics are identified based on the Bond Work Index BWI 9 10 to approximate the energy necessary for ore breakage to compare different ore behaviors while grinding and for designing new ball mill circuits Bond s standard grinding procedure has attracted much attention in recent days due to its

Get Price### Ball Mill Design/Power Calculation

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

Get Price### AMIT 135 Lesson 7 Ball Mills CircuitsMining Mill

A function of the work index of the material Bond developed an express ion to quantify mill shaft power based on data from a number of laboratory and industrial ball mills Pâ† S = 7.33Jâ† B Î¦â† c 1 0.937Jâ† B Ï â† b LDâ† 2.3 1 0.1 2â† 910Î¦â† C Ï S = Mill power D = Mill diameter in meters

Get Price### Anaconda Mining Reports Metallurgical Testing Results for

Feb 09 2021 Detailed comminution testing characterized ore hardness by SMC SAG Mill Comminution Test and Bond Rod Mill Work Index RWI Bond Ball Mill Work Index BWI and Bond Abrasion Index AI The Composites fell in the range of 28.1 to 32.9 A x b values from the SMC tests considered to be hard to very hard resistance to impact breakage

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

EF5BM= P80 10.3 1.145 P80 3 The EF4 formula requires both the rod mill and ball mill work index rod mill Wi is used to calculate the optimal feed size and because this is a single stage ball mill calculation the F80 is actually the rod mill feed size 10 000 µm from Table 1 and the P80 is the ball mill circuit product The EF5 factor only applies below 75 µm to ball

Get Price### 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

Get Price### Predicting Mill Feed Specific Energy from Bond Ball Mill

1 Predicting Mill Feed Specific Energy from Bond Ball Mill Work Index Tests at Olympic Dam Y Li1 V Liebezeit2 K Ehrig3 M Smith4 B Pewkliang5 and E Macmillan6 1 MAusIMM Senior Geometallurgist BHP Olympic Dam Adelaide South Australia 5000.

Get Price### bond ball mill work index for pure quartz

Bond Work Index Tables Wi Bond work index tables wi Procedure for Determination of Ball Bond Work Index in the Commercial Operations Rapid Determination of Bond Rod mill Work Index.

Get Price### INTENSIFICATION OF BOND BALL MILL WORK INDEX TEST

Sep 12 2017 INTENSIFICATION OF BOND BALL MILL WORK INDEX TEST THROUGH VARIOUS METHODS V Lvov J Sishchuk L Chitalov Tuesday 12 September 2017 by Libadmin2017 References 17th International Multidisciplinary Scientific GeoConference SGEM 2017 sgem SGEM2017 Conference Proceedings ISBN ISSN 29 June5 July

Get Price### Testwork Bond abrasion indexSAGMILLING

The Bond Abrasion Index is a measure of how readily a rock sample will wear away steel that comes into contact with it It is conventionally used to estimate the liner and media wear rate in rod mills ball mills and crushers This is a batch test and returns a result in units of grams the amount of metal that wears off the test coupon .

Get Price### Kinetic grinding test approach to estimate the ball mill

The standard Bond method is the most acceptable method for designing and selecting ball/rod mills described by their basic parameter called work index Wi The standard Bond method is a tedious time consuming procedure requiring at least 710 grinding cycles so that many researchers have

Get Price### Ashwin J BaligaGoogle Scholar

Prediction of Bond s work index from field measurable rock properties K Ram Chandar SN Deo AJ Baliga International Journal of Mineral Processing 157 2016 12 Influence of Operational Parameters on the Efficiency of Rod Mill A Design of Experiments Approach K Ram Chandar AJ Baliga BSS Rao RK Bisen.

Get Price### SMC Test Minerals Processing Comminution TestingSMC

In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing AG and SAG mills Ball mills Rod mills Crushers High Pressure Grinding Rolls HPGR .

Get Price### PDF A quick method for bond work index approximate value

A quick procedure with two grinding cycles for the determination of the Bond work index approximate value is exactly the same as in the first two grinding cycles of the standard Bond test and

Get Price### Bonds vs Bond Funds Which is Right for You Charles Schwab

Jan 24 2020 Source Bloomberg Barclays U.S Aggregate Bond Index as of 12/31/2019 Annual returns are the products of monthly total returns Total return includes coupon and pay down return Past performance is no guarantee of future results What you can do next There s no one right answer bonds or bond funds for every investor.

Get Price### BSRMSTEEL.BD BSRM Steels Ltd Company Profile

The M.S Billets segment produces different graded Billets and transfer the same to produce M.S Rod It manufactures and markets products by setting up rolling and re rolling mills.

Get Price### AMIT 135 Lesson 8 Rod MillsMining Mill Operator Training

Rod mill power is dependent on mill capacity and work index Mill power increases with Increasing rod charge Increasing mill speed Increasing mill length Rowland and Kjos 1980 provided an expression to quantify power draw at the pinion shaft per unit mass of rods Pâ† M

Get Price### Orway Mineral Consultants Canada Ltd Mississauga ON

Bond s approach consists of determining the ore hardness characteristics or Work Index Wi via standardized laboratory testwork The full suite of Bond comminution tests provide the Ball Mill Work Index BWi the Rod Mill Work Index RWi the Crusher Work Index CWi and the Abrasion Index

Get Price### Steel Dynamics Inc.Home

Steel Dynamics Names Mark D Millett as Chairman of the Board May 20 2021 Steel Dynamics Announces Second Quarter 2021 Cash Dividend Apr 19 2021 Steel Dynamics Reports Record First Quarter 2021 Results Apr 19 2021 Reminder Steel Dynamics Announces First Quarter 2021 Earnings Conference Call and Webcast Apr 15 2021.

Get Price### Testwork Bond rod mill work indexSAGMILLING

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 expect a mill with a wave liner and is not compatible with mills using smooth liners .

Get Price### Global Mining Guidelines Group Guidelines

It then outlines the equipment and procedures for rod mill ball mill and impact crushing bond work index testing Download Now Share This Determining the Bond Efficiency of Industrial Grinding Circuits

Get Price### Bond Work Indexan 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

Get Price### SPECIFIC COMMINUTION ENERGYSMC Testing

by the Bond laboratory test using the following equation 80 80 0 295 1 80 80 18 18 ib f p P Gbp p f f f M 1 where M ib = fine ore work index kWh/tonne P 1 = closing screen size in microns Gbp = net grams of screen undersize per mill revolution p 80 = 80 passing size of the product in microns f 80 = 80

Get Price### Tietto zeros in on low cost gold processing in Africa

Apr 09 2020 Tietto said the Bond Abrasion Index returned average results of 0.28 for fresh ore and 0.06 for transitional ore whilst the Bond Rod Mill Work Index averaged out at 13.2 kWh per tonne for fresh ore and only 8.5 kWh/t for transitional ore.

Get Price### Analysis of the Effects of Blasting on Comminution Using

Apr 20 2020 The work index was determined using standard rod mill tests and relative ball mill grindability tests Berry and Bruce 1966 It was found that the rod mill work index of granodiorite decreased by 3 and 8 in the fragments 11.2 mm and − 11.2 mm respectively that were produced by blasting with a powder factor of 0.95 kg/m 3 compared to

Get Price### Photo latinodesigns

bond abrasion index mill abrasion index mill copy 3 of img 0420 abrasion index mill 1/2 ball mills img 8600 crush work index machine cwi 1 cwi 2 cwi 6 cwi 1 1/6 custom vacuum system img 0861 rod mill 1 rod mill 2 rod mill 6 rod mill 1 1/6

Get Price### Bond Work Index Tables Wi Rock Geology Minerals

Bond Work Index Tables Wi Free download as PDF File Text File .txt or view presentation slides online 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

Get Price### Size Reduction Equipment

WORK INDEX Work Index Wi is the gross energy requirement in kilowatt hour per ton of feed kWh/ton of feed to reduce a very large particle to such a size that 80 of the product will pass through a 10micrometer or 0.1 mm screen If Dp is in mm 𝑊𝑖=𝐾 1 𝐷𝑝𝑝 𝐾 = 0.1𝑊𝑖=0.3162𝑊𝑖 I =0.3162𝑊𝑖 1

Get Price### Rapid determination of Bond rod mill work index by

Jan 01 2013 To calculate Bond rod mill work indices the four samples were screened and the particle size distributions plotted in Fig 2.The plot was used to find F 80 of the samples for calculations Fig 3 Fig 4 show the grinding kinetics of Pb Cu Fe and Mn ores in the Bond rod mill in different test sieves The slopes of all lines in the figures are equal to the k value of Eq.

Get Price### Metcom ExpertiseMetcom Technologies

It is a standard measure that brings all size reduction circuits onto a common basis for comparison It starts with Bond s Work Index equation W is the work energy input per ton F80 is the 80 passing size of the circuit feed and P80 is the 80 passing size of the circuit product in microns For example a grinding circuit is processing

Get Price### COMPARISON OF HPGRBALL MILL AND HPGRSTIRRED

Bond ball mill work index C Wi Bond crusher work index D HPGR roll diameter m E sp net specific energy consumption kWh/t F HPGR hydraulic pressing force kN F 80 particle size at which 80 of particles pass in feed F SP Bond rod mill work index SI stress intensity .

Get Price### Size Reduction Equipment

WORK INDEX Work Index Wi is the gross energy requirement in kilowatt hour per ton of feed kWh/ton of feed to reduce a very large particle to such a size that 80 of the product will pass through a 10micrometer or 0.1 mm screen If Dp is in mm 𝑊𝑖=𝐾 1 𝐷𝑝𝑝 𝐾 = 0.1𝑊𝑖=0.3162𝑊𝑖 I =0.3162𝑊𝑖 1

Get Price### Small Scale Tests to Characterise Ore GrindibilitySGS

The Bond rod mill work index is used to calculate the power requirement at intermediate size i.e from 12.5mm to about 1mm The test has been mainly used for the design of rod mills or primary ball mills but it can also be used along with the other Bond tests BWI

Get Price### Ball Mill Design/Power Calculation

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

Get Price### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

specification of the Bond mill are given in Table 1 Table 1 Bond s mill specification and grinding conditions Mill diameter D m cm 30.48 Mill Length L m cm 30.48 Number of mill rotations in minutes n min 1 70 Mill balls weight M b kg 21.125 Geometry of mill liner smooth Grinding type dry V ore cm 3

Get Price### A Comparison of Test Procedures for Estimating the Bond

particle size are calculated and the Bond ball work index is then calculated using the standard Bond ball work index formula 𝑊𝑖= 44.5 𝑃0.23 𝑔𝑏𝑝0.82 10 √𝑃80 10 √𝐹80 2 where W i represents the Bond ball work index F 80 and P 80 are the feed and product particle sizes

Get Price### Bond Work Index Formula EquationMineral Processing

You can also review the step by step Bond Work Index Test Procedure I posted here See thisuseful summaryTable of Bond Work Index by Minerals 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

Get Price### Application of Operating Work Indices in Autogenous

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 a large effect on profitability.

Get Price### China Bond Work Index for Rod Mill Manufacturers and Suppliers

Bond Work Index for Rod Mill Product Image Introduction The Bond Work Index for Ball Mill is a special equipment for testing Bond ball mill work index Simple lab test can choose ball mill by power method or judge the effects of material properties change to the ball milling process or the operation condition of crusher by using this

Get Price### Table of Bond Work Index by Minerals

Jun 19 2015 Source 4 Tenova Bateman mills AG/SAG Rod Ball Mills Source 5 Doering international cylpebs Source 6 SME handbook of mineral processing N.L Weiss Editor NY 1985 Bond Work Index Tester by David Michaud May 13

Get Price