### UBC MINE331 Lecture Notes

ball milling grinding circuit. There are three principal methodologies for sizing SAG mills that are widely used: •. Bond work index based methods;. •. Australian...

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### UBC MINE331 Lecture Notes

ball milling grinding circuit. There are three principal methodologies for sizing SAG mills that are widely used: •. Bond work index based methods;. •. Australian...

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### SAGMILLING.COM .:. Articles

Method is based on The Sizing and Section of Hydrocyclones by Richard Arterburn of Krebs. ... Memorandum describing the SAG mill & ball mill circuit sizing lecture ... Uses the "Bond Work Index" method developed by Barratt to size circuit...

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### Bond Ball Mill Index - JKTech

A Bond Ball Mill Work Index test may be required for the design of a new mineral ... to determine the size of mill required based on ... Bond test procedure method, and presents the results including F80, P80, Grindability and Work Index.

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### accurate, economical grinding circuit design using spi and bond

based on measured parameters and the estimated capital costs of alternative ... This new method was developed to allow design engineers to create ... Index Test, The Bond Rod Mill Work Index Test and the Bond Ball Mill Work Index test.

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### Calculating Power Draw when sizing Ball Mills | LinkedIn

... goes, method to calculate Bond's Work Index (WI) takes into consideration a 250% ... The most important work in the ball mill sizing IMHO is sizing based on the ... As Jonathan notes, modern geometallurgical techniques are a great way to...

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### Ore/Rock Hardness Testing | 3 Great Religions of SAG Grinding ...

Dec 22, 2014 ... Avoid doing Bond work index tests at Australian labs as their geometry of ... to these Australian rod mills, so if using an Australian Bond method you ... The power-based SMC test is comparable to the other power-based methods ... platform for doing SAG/ball mill circuit throughput estimates and mill sizing.

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### Mill sizing method - The Cement Grinding Office

Ball mill sizing with Bond method. (for ball mill(s) single stage circuit). Date. Company/Plant. Ore. 1, Work index (base), kWh/t, kWh/sht. SG Specific gravity of ore

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### Using the SMC Test® to Predict Comminution Circuit ... - SMC Testing

"Fine" covers the size range from a P80 of 750 microns down to P80 sizes typically reached ... Implicit in the approach (and all power-based ... can be determined using the data generated by a conventional Bond ball mill work index test (Mib ... Provided by data from the standard Bond ball work index test using the following...

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### A developed approach based on grinding time to determine ore ...

was ground in various grinding times according to the Bond Ball mill approach to specify the work index values. Based on different grinding times and the obtained results, a new work index ... (specific energy); x=index describing the size.

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### CEMENT GRINDING OPTIMISATION -

The application of the Bond based methodology as well as Population. Balance ... The cement clinker grinding circuit reduces the feed from 80% passing size between 10 and 20 mm to ... Wi - is the Bond ball mill work index (kWh/t),. P80.

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### Simulation studies on Energy Requirement, Work Input and ... - IJETAE

system parameters (viz. particle size & density of materials, number of balls ... inputs on the basis of regression analysis. Different ... Grindability data, based on various techniques to .... equation used by them for the ball mill work index (Bond.

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### modeling the specific grinding energy and ball-mill scaleup

... draw P, which corresponds to a particular ball-mill size ... Based on the way the mill charge moves inside the mill ... (as a function of the Bond work index w.

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### Bond Work Index - Clean Air Engineering

Limestone Analyses via Bond Work Index. For full scale ... percent passing through a given sieve size. The coarsest ... Our in-house laboratory ball mill method is applicable to all ... routine basis so that a data base will exist for comparison...

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### Pergamon B. AKSANI § and B. SONMEZ ¶ Keywords

The Bond Work Index (W~ of an ore is determined by Bond Grindability Tests that indicate ... Some of these methods have included complex algorithms, ... size reduction in ball mills, a kinetic model based on the rate of breakage of cumulative...

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### What Can Go Wrong in Comminution Circuit Design? - ResearchGate

The design of semi-autogenous grinding (SAG) mill based comminution circuits for the treatment of ... implications of the test work methods and data interpretation is required to ... the bond ball mill work indices determinations gave reasonably...

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### technical document - Global Mining Standards

Use of the Bond work index to size industrial grinding equipment is widely ... "standard, n. something established for use as a rule or basis of comparison in ... A standard method for sizing the equipment (or measuring the efficiency) of any ... value for each of crushing, rod milling and ball milling, each over their respective,.

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### Why is the Bond Ball Mill Grindability Test done the ...

Mill Work Index which expresses the resistance of a material to ball milling. ... The Bond Ball Mill Grindability Test is probably based on a laboratory grindability test first ... In both tests, the top size of the feed to the laboratory mill is 3.35mm, and ... They further stated that a method of testing that does not consider the re-.

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### Characteristics of Mae Moh lignite: Hardgrove grindability index and ...

Knowing the Hardgrove indices, the Bond work indices of some samples were estimated using the ... tumbling ball mill, is used to grind high ash content or low grindability coal ... obtained from the size distribution function, if the size modu- lus and ... and Wi of U.S. coal though these two indices are based on quite difference.

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### A NEW COMMERCIAL METAL RECOVERY TECHNOLOGY

COMPARING SAG MILLS AND HPGR ON A CONSISTENT BASIS. Alex Doll and ... same phantom cyclone approach used for a SAG mill design. ... In his Third Theory of Comminution, Fred Bond developed work index relationships expecting ... index of a ball mill to fall below its laboratory-determined work index value [2].

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### Technical Note - New Size Laboratory Ball Mill For Bond Work Index ...

A complete description of these methods is presented by Yap et al. (1982). Determining the Bond Work Index by a new size ball mill During the recent years,...

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### An Overview Of the SmAll-ScAle teStS AvAilAble tO - SGS

The traditional approach to AG or SAG mill design, based on the testing of .... The world widely relies on the ball mill work index for the design and analysis of ball ... The Bond Rod Mill Grindability Test is performed similarly to the ball mill test.

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### accurate, economical grinding circuit design using spi and bond

based on measured parameters and the estimated capital costs of alternative ... This new method was developed to allow design engineers to create ... Index Test, The Bond Rod Mill Work Index Test and the Bond Ball Mill Work Index test.

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### Bond Efficiency Slides - Global Mining Standards

Feb 20, 2014 ... Meeting of Bond Efficiency Guideline Working Group of ... size reduction! ... Mill. THIS IS THE REFERENCE BASIS. FOR ALL WORK INDEX EFFICIENCY. DETERMINATIONS! 10. Page 6. 2/20/2014. 6. Example SAG-Ball Mill Circuit WI Efficiency Calculation ... The Bond method allows us to quantify and.

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### Rod and ball mills circuit sizing method - The Cement Grinding Office

Rod and ball mills circuit sizing method. ... Rod mill as first stage and ball mill sizing with the Bond method. for rod mill(s) + ball ... 1, Work index (base), kWh/t

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### correlation between bond work index and - Assiut University

the comminution energy based on theoretical approaches, it would be beneficial to ... In order to design the comminuting process of a rock, the required .... The Bond's standard ball mill is used to determine the work index value of different.

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### ON

May 30, 1997 ... The work presented in this paper is based on the observations. modelling and ... BALL. The Bond work index of a material is deﬁned as MILL GRINDABH'ITY TEST ... grinding in a ball mill 0f 2—44 m diamemi between the average amount of undersized .... function of the square root of the test sieve size.

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### The Effect of Circulating Load and Test Sieve Size on The Bond ...

Index Based on Natural Amorphous Silica ... grindability is so widely used in mill design the assumption is often made that the method is valid without a ... grindability, on the Bond ball mill grindability (Ghg) and work index (W,) are investigated...

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### Ball Charge Loading - Impact on Specific Power Consumption and ...

Manager of Milling Technology - Senior Process Engineer ... Based on the BWI, a mill design input power is then determined by plying the BWI ... With today's third generation high efficiency separators, the Bond Work Index has had to be.

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### grinding: an overview of operation and design - Minerals Research ...

Bond Method . . . . Step 1: Grindability Test . Step 2: Conversion to an 8 ft. Mill. Step 3: Allowance for Size ... Classification of Ball Mills . ... with the most basic being achievement of liberation of the .... Wi = work index F 80% passing size of feed.