### Bond Rod Mill Work Index Equipment & Apparatus Review

Commentary on the apparatus of the Bond rod mill Work Index by Alex Doll December, 2015 [email protected] The Bond "Third Theory" of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond (and his collaborators) were gathering the information to calibrate comminution models.

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Rod 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 Classifiion Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL

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limestone bond ball mill work index . Bond Mill Work Index Of Limestone dokterolbrechtsbe. bond working index or bwi of limestone what is definition of bond milling work index bond method for ball mill work index test with the bond''s work index, hardgrove index and brittleness tests on six typical rock as a fast method, the determination of the bond index from the hardgrove these studies were

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Grinding. Size control. 4. Screening. Classifiion. Enrichment. 5. Washing 3:40. Grinding – bonds work index 3:45. Technical data: Spherical roller bearing supported ball mills Get price A study of simulating the calculation method of the Bond rodmill A new method of simulatingthe calculation of the Bond rodmill work index

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Generally, Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research, a simple, fast and accurate procedure is introduced to find the rodmill work index based on the conventional Bond work index.

Get price### USING THE SMC TEST® TO PREDICT COMMINUTION

The work index covering grinding in tumbling mills of coarse sizes is labelled M ia. The work index covering grinding of fine particles is labelled M ib (Morrell, 2008). M ia values are provided as a standard output from a SMC Test® (Morrell, 2004a) whilst M ib values can be determined using the data generated by a conventional Bond ball mill

Get price### Investigation into the applicability of Bond Work Index

Oct 15, 2015 · Investigation into the applicability of Bond Work Index (BWI) and Hardgrove Grindability Index (HGI) tests for several biomasses compared to Colombian La Loma coal However the BWI can be applied to ball and rod mills, and is the most commonly used method of sizing these mills. 3.3. Bond work index mill behaviour.

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bond s work index ball mill details specifiion. Index Test, The Bond Rod Mill Work Index Test and the Bond Ball Mill Work Index test, power and Bond''s equations an autogenous work index (AWi) for the sample was calculated This, crusher in the SAG/AG circuit is a technical and reasonably welldefined decision, GRINDING EQUIPMENT SPECIFICATION

Get price### Comparison of Ore Hardness Measurements for Grinding

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). The comparison of these results gives context to how the various measurements relate to each

Get price### Investigation into the applicability of Bond Work Index

Oct 15, 2015 · Investigation into the applicability of Bond Work Index (BWI) and Hardgrove Grindability Index (HGI) tests for several biomasses compared to Colombian La Loma coal However the BWI can be applied to ball and rod mills, and is the most commonly used method of sizing these mills. 3.3. Bond work index mill behaviour.

Get price### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

comminution plants designing. Determining the Bond work index value is quite complied, timeconsuming and requires trained operating personnel and therefore is subjected to errors. 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.

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Generally, Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research, a simple, fast and accurate procedure is introduced to find the rodmill work index based on the conventional Bond work index.

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

The mill power is = 22.5 Watts, calculated by (6). Fi P nally the product is wet screened to find the size d80. 2.4. Rod Mill Semi Continuous Process The same mill is used for the semi continuous grinding tests which is similar to the Bond test but with the exist ing mill of known power. After time the mill

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determination of the work index for ball and rod mills in 1952 and modified it in 1961. The standard Bond ball mill grindability test is a closed circuit dry grinding test with a 250% circulating load. The standard procedural outline of the test is stated in (Bond) 1961. The work index for a ball mill, Wi, is then calculated from the following

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The Bond ball mill work index test is thought to be additive because of its units of energy nevertheless, experimental blending results show a nonadditive behavior. [18] The SPI(R) value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant .

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The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond. This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills.

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Relationships between comminution J energy and product, The test work involved Bond ball mill testing, rod milling, low intensity magnetic separation, expressed by the Bond ball mill work index, is

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Determining the Bond work indexes of a sample involves tests using laboratory scale grinding circuits. A unit weight is determined by achieving maximum packing of the prepared ore sample the unit weight is then fed into the circuit, with undersized product being replaced by

Get price### Comparison of UCS to Bond Work Indices

FIGURE 5: BOND ROD MILL WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 35 WiRM (metric) The lack of fit observed relating the crushing Work Index was expected to carry over to the other Bond Work Indices. Figure 5 displays the plot of rod mill Work Index (Wi RM) versus UCS. These

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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 advice, or need to conduct a

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* Bond F. C., "Crushing Tests by Pressure and Impact", Trans AIME, Vol 169, 1947, pp 5866. 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.

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The standard Bond Rod Mill Work Index test procedure is firstly to stage crush the feed to pass 12.7 mm, and size a representative sample. The test then involves a series of batch grinds in a standard Bond rod mill. A Bond rod mill is 0.305m by 0.610m, with wave liners (of a form described by Bond), which runs at 40rpm and tilts as described below.

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Bond Work Index Procedure and Method Mineral 20191125 This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work. Largescale crushing & screening & milling plants. Offer efficient, costeffective services for you. +7(927)687 07 58

Get price### USING THE SMC TEST® TO PREDICT COMMINUTION

The work index covering grinding in tumbling mills of coarse sizes is labelled M ia. The work index covering grinding of fine particles is labelled M ib (Morrell, 2008). M ia values are provided as a standard output from a SMC Test® (Morrell, 2004a) whilst M ib values can be determined using the data generated by a conventional Bond ball mill

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Relationships between comminution J energy and product, The test work involved Bond ball mill testing, rod milling, low intensity magnetic separation, expressed by the Bond ball mill work index, is

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Rapid determination of Bond rodmill work index by, The jaw crusher (JC2000, 200 130 mm jaw crusher, Labtech Essa Pty Ltd, Australia), the The test of determining the standard Bond rodmill work index standard Bond rodmill (Labtech Essa Pty Ltd, Australia) and ASTM includes a closed grinding cycle with a screen (Fig 1)

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Bond Work Index FormulaEquation Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack Energy The basic work index equation is:W = 10 Wi/√P – 10 Wi/√F(1)where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding resistance

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Oct 03, 2015 · The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond. This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills.

Get price### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

comminution plants designing. Determining the Bond work index value is quite complied, timeconsuming and requires trained operating personnel and therefore is subjected to errors. 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.

Get price### MODELING THE SPECIFIC GRINDING ENERGY AND BALL

2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill 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)

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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 closedcircuit dry grindability test performed in a standard rod mill.

Get price### Bond Grinding Circuit Efficiency

Rod 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 Classifiion Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL

Get price### Bond Work Index Tests Grinding Solutions Ltd

Bond Work Index Tests. Grinding Solutions offers a range of Bond Work Index Testing from crushability and abrasion to ball and rod mills. For more information on the tests please see below: Bond Low Energy Impact Test. The Bond LowEnergy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index.

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estimate Bond work index for the sample. Results show that there is indeed a correlation between the two grindability test methods. Using a linear model, an experimental model is presented, where the Mergan mill can be used to approximate the Bond work index for an ore with good correlation.

Get price### Comparison of Ore Hardness Measurements for Grinding

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). The comparison of these results gives context to how the various measurements relate to each

Get price### 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 waveshaped 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

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