# Ball Mill Work Index Calculation

### Bond Work Index Formula-Equation

See this useful summary Table 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 100 um

### Ball Mill Design/Power Calculation

Ball Mill Power Calculation Example #1 A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch (6350 microns) The required product size distribution is to be 80% passing 100 mesh (149 microns)

### Calculation of energy required for grinding in a ball mill

Calculation of energy required for grinding in a ball mill Int J Miner Process, 25: 41-46 The Bond work index, Wi, as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product

### mineral processing ball mill grinding media calculation

Feb 22, 2018 · XMQ Series Cone Ball Mill is a lab grinding equipment for wet fine grinding of ore in the ball mill, and steel balls of a certain size and number are put into the ball mill repeatedly, and obtain the grinding work index (kwh/t) through calculation is mainly used in metal mineral processing laboratory, It uses wet method

### ball size calculation for ball mill

Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work in the ball mill, and steel balls of a certain size and number are put into the ball mill repeatedly, and obtain the grinding work index (kwh/t) through calculation

### ball mill diameter for 150 t h calculation - ebomarit

classifier calculation in ball mill - Mineral Processing EPC Aug 28, 2017· Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work Index Ball repeatedly, and obtain the grinding work index (kwh/t) through calculation gold pan, feeder, classifier, ore …

### calculation of power for ball mills and grinding - tasleekorg

Calculation of Media Charge - Jyoti Ceramic Industries Pvt Ltd Calculations for mill motor power, mill speed and media charge the weight of mill lining and grinding media, work out the motor power required, To calculate the motor power required for a cylindrical type ball mill, the following formula can

### sagdesign

testing measures the macro and micro ore hardness by means of a SAG mill test and a standard Bond Ball Mill Work Index test on SAG ground ore Ore feed is prepared from a minimum of 10 kg of split diamond drill core samples by stage crushing the ore in a jaw crusher to 80% product passing 19 mm

### ball mill calculation formula - suttonseedsindia

A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at which the centrifugal forces equal gravitational forces at the mill shells inside surface and no …

### Application of Operating Work Indices in Autogenous

work indices for the AG/SAG mill and ball mill can be re-organised as [7] and [8], where B’Wio and A’Wio are the corrected operating work indices and WAG/SAG, WBM are the respective power draw of AG/SAG and ball mills Note that the ball mill operating work index is applied only on the portion that needs the additional grinding (Q2),

### Application of Operating Work Indices in Autogenous

work indices for the AG/SAG mill and ball mill can be re-organised as [7] and [8], where B’Wio and A’Wio are the corrected operating work indices and WAG/SAG, WBM are the respective power draw of AG/SAG and ball mills Note that the ball mill operating work index is applied only on the portion that needs the additional grinding (Q2),

### Bond Ball Mill Work Index (Grindability Tests) - YouTube

May 18, 2013 · This video was put together by Joshua Wright and Aldo Vasquerizo as a supplemental lecture for University of Nevada Reno If you have any questions, need …

### JKTech Laboratory Services

Bond Ball Mill Index Test (BRMWI) A Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball Mill Work Index of a sample of ore The BBMWI is a measure of the resistance of the material to crushing and grinding

### ball mill load calculations - veronaschoolhouse

Mar 09, 2017 · Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work Index Ball Mill , Find Complete Details about Laboratory Ball Mill For Bond Work Index Procedure Then carry out dry grinding at specific rpm, sieve and weigh products repeatedly, and obtain the grinding work index (kwh/t) through calculation

### Bond Ball Mill Index Test | JKTech

The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions It is a 'locked cycle' test conducted in closed circuit with a laboratory screen

### Ball Mill Design/Power Calculation - LinkedIn

Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch (6350 microns)

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

Ball Mill Batch Process The mill dimensions, (D × L), are 0204 × 0158 m and it is loaded with 65 kg steel balls between 25 and 32 mm in diameter The mill rotates on rolls and its frequency is A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material

### small ball mill design calculation

Laboratory Ball Mill For Bond Work Index Procedure And Method Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work Index for lab testing & small grinder ore repeatedly, and obtain the grinding work index (kwh/t) through calculation

### MODELING THE SPECIFIC GRINDING ENERGY AND BALL …

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)

### Bond Work Index Tables (Wi) - Scribd

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

### all process calculation about ball mill

all process calculation about ball mill Ball Mill For Sale Uk A wide variety of ball mill for sale uk options are available to you, All Countries and Regions China Used Calculation Stone Aluminium Powder Vibrating Roller Steel Ball Grinding Mill

### O I SKARIN N O TIKHONOV CALCULATION OF THE …

CALCULATION OF THE REQUIRED SEMIAUTOGENOUS MILL POWER BASED ON THE BOND WORK INDEXES O I SKARIN, for finer particles — ball milling work index BWI (Table) These indexes are readily obtained using the 80 is the size of 80% content of ball mill feed in WAM — CDBM circuit (typically 1000–3000 μm); GDRM

### Ball mill - Wikipedia

A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics and selective laser sintering It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell

### ball mill design power calculation - phonecheckercoza

Laboratory Ball Mill For Bond Work Index Procedure And Method Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work light, coal, water conservancy, electric power, agricultural and geological industries repeatedly, and obtain the grinding work index (kwh/t) through calculation

### O I SKARIN N O TIKHONOV CALCULATION OF THE …

CALCULATION OF THE REQUIRED SEMIAUTOGENOUS MILL POWER BASED ON THE BOND WORK INDEXES O I SKARIN, for finer particles — ball milling work index BWI (Table) These indexes are readily obtained using the 80 is the size of 80% content of ball mill feed in WAM — CDBM circuit (typically 1000–3000 μm); GDRM

### Ball mill - Wikipedia

A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics and selective laser sintering It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell

### ball mill design power calculation - phonecheckercoza

Laboratory Ball Mill For Bond Work Index Procedure And Method Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work light, coal, water conservancy, electric power, agricultural and geological industries repeatedly, and obtain the grinding work index (kwh/t) through calculation

### TECHNICAL NOTES 8 GRINDING R P King - Mineral Tech

8-3 Centrifugal force outward Fc mp& 2 Dm 2 (81) & 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 (82) The particle will remain against the wall if these two forces are in balance ie

### Ball Mill Calculation | Crusher Mills, Cone Crusher, Jaw

Ball Mill Design Calculation IMPACT ON GRINDING MILL DESIGN OF RECENT NEW DISCOVERIES Table 2 – Typical Mill Design Calculations CASE … ball load calculation in ball mills – Gold Ore Crusher CALCULATION OF THE POWER DRAW OF DRY MULTI–COMPARTMENT BALL … calculation of mill load

### Ball Mill Calculations | Mill (Grinding) | Industrial

Ambuja Cement Rajasthan Limited Ball Mill Performance & Efficiency S Description Symbol Formula Example No 1 Arm of gravity a 0666 * ( 1 - 4 * R2 )15

### A Methodology to Estimate Ores Work Index Values, Using

Ball mill charge size distributions originally specified for Bond grindability tests to determine the Bond Work index (BWi) are not commercially available

### 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 oversize factor calculation …

### high quality ball mill design calculation

Laboratory Ball Mill For Bond Work Index Procedure And Method Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work Index high Quality Then carry out dry grinding at specific rpm, sieve and weigh products repeatedly, and obtain the grinding work index (kwh/t) through calculation

### Ball Mill Finish Calculator - Martin Chick & Associates

Ball Mill Finish Calculator The Ball Mill Finish Calculator can be used when an end mill with a full radius (a ball mill) is used on a contoured surface The tool radius on each side of the cut will leave stock referred to as a scallop

### Mill (grinding) - Wikipedia

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 ball mill calculations spreadsheet

The effect of mill feed size and hardness on throughput rate is apparent with feed 2 WiC = Bond Crusher Work Index, Wibm = Bond Ball Mill Index and Wirm by and hence can not be integrated into a spreadsheet calculation

### A study of simulating the calculation method of the Bond

Based on the nth order grinding kinetic equation and the theory of linear additivity in the grinding process, the grinding kinetic characteristics of the feed and the circulating load in standard Bond rod-mill grindability tests are studiedA 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

### Alternative Approaches for Determination of Bond Work

index (by calculation) is almost matching with measured Bond’s work index The Bond’s work index of the above rock samples calculated from the Hardgrove index value has shown a variation from 77 to 103 kWh/sht A correlation is found between the friability value and work index