Online Service
1. Home
2.  | Bond Ball Mill Work Index Equation

# Bond Ball Mill Work Index Equation

• ### Bond Ball Mill Work Index Equation In Wills

Ball Mill Design Power Calculation 911 Metallurgist 19 06 2015 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 density desired mill tonnage capacity DTPH operating solids.Dec 04 2020 The laboratory procedure for running a Bond ball mill work index test requires that the operator choose a closing screen sieve size The instruction is to choose a sieve size that results in the.

• ### Ball Mill Bond Work Index

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.

• ### Correction Of Bond Ball Mill Work Index Test For Closing

Bond ball mill work equation in wills The work index (Wi) is calculated in a laboratory scale ball mill with Bond equation The Bond work index has been widely used in designing full scale mills but the Bond test is rather complex lengthy susceptible to procedural errors and this is why attempts have been made to abbreviate and simplify Bond test procedure (Weiss 1985).

• ### P80 Of Bond Ball Mill Work Index Tests Linkedin

Jan 01 1989 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 ratory Bond ball mill Based on the results of grinding experiments numerical values of the work index Wi are calculated according to the formula.

• ### Calculation Of Energy Required For Grinding In A Ball Mill

Dec 09 2020 The way Levin derived this value is by substituting the Bond specific energy equation into the Bond ball mill work index equation and then reformulating until isolating the industrial mill.

• ### A Bond Work Index Mill Ball Charge And Closing Screen

Shahsavari Procedure for determination of Bond ball work The grindability experiments was carried out on the four typical index in the commercial operations Min Eng 22 (2009) 104–106 samples of copper lead–zinc manganese and iron ore in specified [13] L Tavares R Carvalho J Guerrero Simulating the Bond rod mill grindability.

• ### Equipment Design Equation Ball Mill

21 CONCLUSIONS Continued In the present work equations were also derived giving zthe ball mill power drawP as a function of its dimensions internal mill diameter D and length L zthe ball mill power drawP as a function of the feed D f (mm) and the product size d (mm) the Bond work index w i (kWh short ton) and the mill throughput T (short ton h) zthe ball mill dimensions (D and L) when.

• ### Bond Work Index (energy Equation)

Dec 07 2018 The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis to another The proposed model consists of two components the variable coefficient that is determined from a specific work index determination and a fixed exponent determined by a calibration procedure.

• ### Amit 135: Lesson 7 Ball Mills & Circuits – Mining Mill

The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis to another The proposed model consists of two components the variable coefficient that is determined from a specific work index determination and a fixed exponent determined by a.

• ### Comparison Of The Different Ways Of The Ball Bond Work

Aug 10 2017 An alternative mill ball charge is proposed that closely approximates Bond's original total ball mass number of balls and ball surface area Results of 30 Bond Work index tests of six pure materials (calcite magnesite labradorite (feldspar) quartz andalusite and glass) using closing screen apertures (P 1 ) values of 500 250 125 90 and.

• ### Modeling The Specific Grinding Energy And Ball

Jan 01 2013 To calculate the Bond work index ( Wi) in a standard laboratory scale rod mill Bond derived the following equation (1) W i = 62 P i 0 23 G i 0 625 10 P 10 F kw h sh t where F is 80 passing size of original feed P is 80 passing size of circuit product and Pi is the test sieve size in μm [1] The standard procedure to determine all Bond.

• ### Rapid Determination Of Bond Rod

For overflow ball mills the charge should not exceed 45 of the mill volume For grate discharge mills the charge should occupy about 50 of the mill volume Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge He and the radius of the mill R i e.

• ### (pdf) Rapid Determination Of Bond Rod

Between the rod mill and ball mill values for a given ore type These differences may be caused by a variation in ore hardness by size (12 5mm for RWI and 3 35mm for BWI) and or grain size properties 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.

• ### Levin B Another Bm Grindability Metric

Dec 18 2013 It can be seen that in the regime in which the Bond equation is valid energy use increases exponentially as product size decreases with constant feed size with an exponent of (approximately) −0 5 For P80s finer than 75 μm the Levin test a modified Bond ball mill work index test may be used to predict grinding performance.

• ### Small Scale Tests To Characterise Ore Grindibility

The form of Equation (3) The Jar Mill test favoured by Metso gives a table of results of E and measured size x for a progressive batch grinding test these results can be fitted as demonstrated in Figure 4 A series of Bond ball mill work index tests run at different.