### Bond Work Index - an overview ScienceDirect Topics

Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size; SAG mill design requires an appropriate SAG test, for example, SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample, including the maximum attainable recovery and rate constants for each mineral ( Chapter 12 ).

More### Bond Work Index Test Ball Mill - 911Metallurgist

The FC Bond Work Index Test Ball Mill was designed by F. C. Bond for use in determining the Bond Index, a measure of grindability and power required for grinding applications. The FC Bond Mills are used in laboratories throughout the world. A copy of Fred C. Bond’s Method of Crushing and Grinding for determination of the Bond Index is included with each mill.

More### Bond's Work Index Ball Mills - insmart systems

Insmart Bond’s Ball-Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. This Index is widely used in the industry for comparing the resistance of different materials to ball milling, for estimating the energy required for grinding and for ball mill scale-up.

More### Procedure for determination of ball Bond work index in the

Jan 01, 2009 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 ...

More### Bond Tests SGS

Similar to a Comparative Work Index, this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a set time. It can be used at mesh sizes from 65 to 200 mesh (normally 100 mesh). The test requires calibration against the standard Bond Ball Mill Work Index test to estimate the Work Index.

More### Ball Mill Design/Power Calculation - LinkedIn

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

More### bond s work index ball mill manufactuering design in bhutan price

bond s work index ball mill manufactuering design in bhutan price. Geometallurgical estimation of comminution indices for Know More Table 23 Bond ball mill work Index sample ID 4 8 11 14 16 and 18 comes from SDP core mm t is the thickness of the specimen measured from the centers of the samplemm Li and Wong 2013 242 Particle good fit to the line...We are a professional mining

More### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the

Where, WioACTis the Actual Operating Bond Work Index (kWh/t), W is the specific energy input (kWh/t), P80 is the 80% passing size of product (µm), and F80 is the 80% passing size of circuit feed (µm). 2. Calculate the Standard Circuit Bond Work Index (WiSTD) for

More### cambodia bond s work index ball mill manufactuering design

Bonds Work Index Ball Mill Manufactuering Design A. Inde Bond Mill Of Mining Industry Labtech. 2020-5-2Bonds work inde ball mill manufactuering design and bonds.Bond s work index ball mill manufactuering.Designrinding mill is the required process when.Sie reduction of below 520 mm is neededrinding mill is a.Powdering or pulveriing process of many kinds of minerals.Barite.Limestone

More### bond’s work index ball mill manufactuering design - Grinding Mill

Home»Products»Ball Mill»bond’s work index ball mill manufactuering design. Products ... bond’s work index ball mill manufactuering design. Posted at: July 8, 2013 [ 4.8 - 6888 Ratings ]

More### Bond Index Ball Mill / Rod Mill BT 100 XL - RETSCH

The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a wave-shaped design. 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 ...

More### Ball Mill Design/Power Calculation - LinkedIn

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

More### Application of Operating Work Indices in Autogenous

Ball Mill Wio, BWio 8.6 Circuit Wio, OWio 14.6 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 ...

More### 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 (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

More### CORRELATION BETWEEN BOND WORK INDEX AND

the work index depending on the grind size. In this way, work index values are usually obtained for some specific grind size that characterizes the grinding operation to design or under evaluation. This study was carried out in a standard bond ball mill 305 mm x 305 mm size

More### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the

Where, WioACTis the Actual Operating Bond Work Index (kWh/t), W is the specific energy input (kWh/t), P80 is the 80% passing size of product (µm), and F80 is the 80% passing size of circuit feed (µm). 2. Calculate the Standard Circuit Bond Work Index (WiSTD) for

More### 1-day Technical Seminar

W = Bond’s work index (kWh/t) P 80 = particle diameter of product, 80% passing (µm) F 80 = particle diameter of feed, 80% passing (µm) o The Bond’s Work Index of a material, which is commonly used in the British Commonwealth as well as US, is determined in a standard laboratory ball mill but the test is cumbersome to perform.

More### Optimizing Raw Mills Performance ; the Materials WAY

Jun 22, 2019 Bond Ball Work Index for Some cement raw materials is as under. (FC Bond Paper) Limestone 11.30 , Shale 16.40 ,Bauxite 9.45 , Gypsum 8.16, Silica Sand 16.46 , Iron Ore 15.44 ,

More### 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

More### Use of drilling performance to improve rock-breakage efficiencies: A part of mine-to-mill

Mar 01, 2020 Determination of the Bond work index using an ordinary laboratory batch ball mill. Design and installation of comminution circuits; 1982, p. 176–203. Google Scholar

More### 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

More### O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

10 mm), the crushing work index SWI is applicable; for me-dium size particles (from 100 mm to 2100 μm) — rod milling work index RWI; for finer particles — ball milling work index BWI (Table). These indexes are readily obtained using the special-purpose laboratory equipment (Fig. 1). Finding the total specific energy consumption

More### 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 (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

More### bond’s work index ball mill manufactuering design - Grinding Mill

Home»Products»Ball Mill»bond’s work index ball mill manufactuering design. Products ... bond’s work index ball mill manufactuering design. Posted at: July 8, 2013 [ 4.8 - 6888 Ratings ]

More### 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

More### O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

10 mm), the crushing work index SWI is applicable; for me-dium size particles (from 100 mm to 2100 μm) — rod milling work index RWI; for finer particles — ball milling work index BWI (Table). These indexes are readily obtained using the special-purpose laboratory equipment (Fig. 1). Finding the total specific energy consumption

More### Optimizing Raw Mills Performance ; the Materials WAY

Jun 22, 2019 Bond Ball Work Index for Some cement raw materials is as under. (FC Bond Paper) Limestone 11.30 , Shale 16.40 ,Bauxite 9.45 , Gypsum 8.16, Silica Sand 16.46 , Iron Ore 15.44 ,

More### 1-day Technical Seminar

W = Bond’s work index (kWh/t) P 80 = particle diameter of product, 80% passing (µm) F 80 = particle diameter of feed, 80% passing (µm) o The Bond’s Work Index of a material, which is commonly used in the British Commonwealth as well as US, is determined in a standard laboratory ball mill but the test is cumbersome to perform.

More### Using the Bond work index to measure operating comminution efficiency

Using the Bond work index to measure operating comminution efficiency C. A. Rowland 1 Mining, Metallurgy Exploration volume 15 , pages 32 – 36 ( 1998 ) Cite this article

More### 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

More### Use of drilling performance to improve rock-breakage efficiencies: A part of mine-to-mill

Mar 01, 2020 Determination of the Bond work index using an ordinary laboratory batch ball mill. Design and installation of comminution circuits; 1982, p. 176–203. Google Scholar

More### SAGDesign Test Starkey and Associates Inc.

The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S d-BWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial applications.

More### Grinding Circuit at Mouteh Gold Mine

Where operating work index (kwh/t) isWiop, mill power draw (kw) isW, Q is mill throughput (t/h) andP80,F80 are respectively mill product and feed size distributions. Operating Bond index is not comparable to laboratory standard Bond index; therefore a few correction factors should be multiplied to obtain of corrected operating Bond index[13, 17].

More### AMIT 135: Lesson 7 Ball Mills Circuits – Mining Mill Operator

Mill Type Overview. Three types of mill design are common. The Overflow Discharge mill is best suited for fine grinding to 75 – 106 microns.; The Diaphram or Grate Discharge mill keeps coarse particles within the mill for additional grinding and typically used for grinds to 150 – 250 microns.; The Center-Periphery Discharge mill has feed reporting from both ends and the product discharges ...

More### Comminution testing - JKTech - University of Queensland

Jul 30, 2020 An improved method using less mass compared to the Bond Ball Mill Work Index test. The JK Bond Ball Mill (JKBBM) test, is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and material feed size (100% passing 3.35 mm) as the Bond Ball Mill Work Index test.

More### The essential grind - CIM

Sep 17, 2020 The Bond Ball Mill Work Index remains today as the only tool used for ball mill scale-up design. For an (only nominally, not at all materially modified) update on its use for industrial mill sizing, see “Selection of Rod Mills, Ball Mills, Pebble Mills, and Regrind Mills

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