### A quick method for bond work index approximate value

A quick method for the Bond work index approximate value determination which is based on the first order grinding kinetics is presented in this paper. test approach to estimate the ball mill

Chat Online### Bond formula for the grinding balls size calculation

Oct 19 2017 · Bond formula for the grinding balls size calculation October 19 2017 · Archive · 0 . The enterprises consumers grinding media have a question about right choise the grinding ball size (diameter) for the mill in order to achieve the required grinding quality.

Chat Online### COMMINUTION 10SAGDesign

commercial grinding conditions for the test in a 0.5 m diameter SAG mill. In the 2009 database SAG pinion energies (to grind from F80 152 mm to T80 1.7 mm) vary from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150 000 t/d SAG mill sizes varied from 10 ft

Chat Online### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

The aim of this study was to develop a new method for assessing the Bond work index in a ball mill (BBWI) which is based on a first order kinetics present in the Bond ball mill for grinding mineral raw materials (Austin et al. 1981 Ahmadi and Shahsavari 2009). Theoretical basis of quick procedure

Chat Online### Investigation into the applicability of Bond Work Index

(HGI) being the standard test for vertical spindle mills 7 8 and the Bond Work Index (BWI) for tube and ball mills 9 10 . No stan-dard grindability tests currently exist for biomass and there have only been limited studies on the use of standard grindability tests for coal on biomass which have mainly focused on torreﬁed mate-rials 11

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The Bond Ball Work Index Test determines the resistance of ore to grinding in a ball mill expressed as a work index kilo Watt hour per ton (kWh/t). The work index is then used to calculate the specific energy requirements for sizing ball mills or determining their throughput for a target grind. Sample Requirements 10kg -3.35mm

Chat Online### Bond MillEDEMET

The EDEMET Bond Mill is designed to perform the Bond ball mill work index test to determine the grinding energetic consumption of diverse minerals. As this is a standard test its design has been maintained according to the traditional equipment. Aditional information about the EDEMET Bond Mill can be found currently in our spanish websites edemet.cl

Chat Online### Comparison of Ore Hardness Measurements for Grinding

by Hazen Research Inc. (HRI) to obtain the JK parameters using the JK Drop Weight Test 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. (See reference 8 below).

Chat Online### Bond Abrasion Index Test MachineYouTube

Mar 29 2017 · The abrasion test is mainly used to assess hammer wear in an impact type crusher (e.g. a hammer mill) hence the much higher rotational speed whereas the Bond abrasion test is

Chat Online### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the

WiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy requirement at

Chat Online### Comparison of UCS to Bond Work Indices

Comparison of UCS to Bond Work Indices Alex Doll Alex G Doll Consulting Ltd Edmonton Canada Derek Barratt DJB Consultants Inc North Vancouver Canada Ken Wood Fluor Mining Minerals Vancouver Canada Abstract Unconfined Compressive Strength (UCS) is a commonly used rockmass strength measurement used by

Chat Online### Investigation into the applicability of Bond Work Index

(HGI) being the standard test for vertical spindle mills 7 8 and the Bond Work Index (BWI) for tube and ball mills 9 10 . No stan-dard grindability tests currently exist for biomass and there have only been limited studies on the use of standard grindability tests for coal on biomass which have mainly focused on torreﬁed mate-rials 11

Chat Online### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the

WiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit WiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy requirement at Chat Online### 20150821 Morrell Method-GMG-ICE-v01-r01 Morrell method

ization data generated from the SMC Test® (see Annex A) and the Bond Ball Mill Test Work Index (WiBM GMG 2016a) and the Morrell equations and their application (see Annex B). A worked ization data generated from the SMC Test® (see Annex A) and the Bond Ball Mill Test Work Index (WiBM GMG 2016a) and the Morrell equations and their application (see Annex B). A worked example is provided in Annex C. 5. SCOPE The Morrell method can be used to predict the specific energy of comminution circuits where such circuits include Chat Online### Bond Index Hardgrove Grindability Index Tests for

Bond Index Test Test conducted on a Bond Index testing mill (Bico-Braun USA) 700ml of sample milled for 100 revolutions. New number of revolutions is calculated to produce fines equal to 1/3.5 of the total charge of the mill. The Bond Work Index W i expresses the resistance of the material to

Chat Online### Bond Tests Mining SGS Angola

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 . 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. Chat Online### Bond Grinding Circuit Efficiencyceecthefuture

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 INDEX EFFICIENCY DETERMINATIONS 10

Chat Online### Bond Tests Mining SGS China

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.

Chat Online### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

Bond Test WI s (kWh/t) Rod Mill Ball Mill 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19 300 mµ Bond Test WI s (kWh/t) Rod Mill Ball Mill 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19 300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16 000 m) to a rod µ Chat Online### a Magnetite Ore in Eastern Hebei China

2.4. Bond Ball Work Index Test A grinding mill (F305 mm 305 mm) was used for the Bond ball mill work index test 18–21 . This ball mill was ﬁlled with 285 steel balls (total weight of 20.125 kg) at an operation speed of 70 rpm. The feed sample was prepared via crushing and sieving giving rise to a size smaller than 3.35 mm.

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bond ball mill work index testwork providerschinagrindingmill. bond ball mill work index testwork providers (11 Jun 2012) Gulin supply Mining and construction equipment for mineral bond ball mill work index testwork providerschinagrindingmill. bond ball mill work index testwork providers (11 Jun 2012) Gulin supply Mining and construction equipment for mineral handling. The crushing screening washingChat Online### COMMINUTION 10SAGDesign

commercial grinding conditions for the test in a 0.5 m diameter SAG mill. In the 2009 database SAG pinion energies (to grind from F80 152 mm to T80 1.7 mm) vary from 1.4 to 34 kWh/t and Bond commercial grinding conditions for the test in a 0.5 m diameter SAG mill. In the 2009 database SAG pinion energies (to grind from F80 152 mm to T80 1.7 mm) vary from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150 000 t/d SAG mill sizes varied from 10 ft Chat Online### Procedure for determination of ball Bond work index in the

1. Introduction. A Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore. It was developed by Fred Bond in 1952 and modified in 1961 (JKMRC CO. 2006).This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill

Chat Online### a Magnetite Ore in Eastern Hebei China

2.4. Bond Ball Work Index Test A grinding mill (F305 mm 305 mm) was used for the Bond ball mill work index test 18–21 . This ball mill was ﬁlled with 285 steel balls (total weight of 20.125 kg) at an operation speed of 70 rpm. The feed sample was prepared via crushing and sieving giving rise to a size smaller than 3.35 mm.

Chat Online### A Comparison of Test Procedures for Estimating the Bond

Two shortened test procedures for estimating the Bond ball work index are compared for suitability of use on Zambian/DRC-type copper–cobalt ores. The first procedure is based on a batch milling Two shortened test procedures for estimating the Bond ball work index are compared for suitability of use on Zambian/DRC-type copper–cobalt ores. The first procedure is based on a batch milling test while the second procedure is based on a limited locked-cycle test. Both procedures were conducted using a standard Bond test mill. INTRODUCTION Chat Online### Abrasion Test Mining SGS

The Bond Abrasion Test determines the Abrasion Index which is used to determine steel media and liner wear in crushers rod mills and ball mills. Bond developed the following correlations based The Bond Abrasion Test determines the Abrasion Index which is used to determine steel media and liner wear in crushers rod mills and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process. Chat Online### Bond Work Index Procedure and Method

This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.

Chat Online### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the

WiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy requirement at

Chat Online### Bond Ball Mill Work Index (Grindability Tests)YouTube

May 19 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 advice or need to conduct a metallurgical

Chat Online### Bond Tests Mining SGS China

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.

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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

Chat Online### Why is the Bond Ball Mill Grindability Test done the way

The Bond Ball Mill Grindability Test is a locked-cycle laboratory grinding test. It provides the Bond Ball Mill Work Index which expresses the resistance of a material to ball milling. This Index is widely The Bond Ball Mill Grindability Test is a locked-cycle laboratory grinding test. It provides the Bond Ball Mill Work Index which expresses the resistance of a material to ball milling. This Index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill scale-up. The test has Chat Online

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