bond s work index ball mill manufactuering design

  • Circulating loadSlideShare

     · The Bond s work index values increased as test sieve size decreased. 16. Bond work index is changed with the change in the test sieve size and circulating load. This must be taken into account when energy consumption is calculated according to the Bond formula. unit energy cost extra increased as circulating load decreased from 250 .

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  • SAGMILLING.COM . . Articles

    Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh

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  • A Method of C alculating Autogenous/ Semi-Autogenous

     · rod mill work index has not been de ned as yet. The ball fi mill work index is con rmed at 16 kWh/t. The operating fi work index though is in the range of 21 kWh/t to 25 kWh/t showing high ineffi ciency. This raises the point that in some cases the Bond EF4 oversize factor calculation is not suf cient to compensate fi

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  • test method for bond ball mill work index

    Test Method For Bond Ball Mill Work Index. kinetic grinding test approach to estimate the ball mill work the most important parameter in this empirical equation is the bond work index (wi) which expresses the resistance of a material to comminution..a new approach to bond grindability and work index the bond work index values (w i ) are calculated from the equation been tested and that now

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  • A new approach to the calculation of bond work index for

     · Determination of the Bond work index using an ordinary batch ball mill A.L. Mular G.V. Jergensen (Eds.) Design and Installation of Comminution Circuits AIME New York ( 1982 ) pp. 176

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  • SINGLE STAGE SAG/AG MILLING DESIGNOrway

     · For a new design the approach taken by OMC is to seek closure between two modelling methods. Typically power base modelling is utilised. OMC generally use power based methods using either the results of an Autogenous media competency test or JK Drop Weight test in combination with a Bond Ball Work Index result. SPI or SAGDesign

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  • Grinding Circuit Design for Adanac Moly

    in terms of SAG power index SPI (for SAG grinding) and Bond Ball mill work index BWi (for ball mill grinding). A further measure the Minnovex crusher index Ci was also measured for use in the CEET program to determine SAG mill feed size (Kosick and Bennett 2001). The SPI values varied from 13.5 to 107 minutes with an average of 53 minutes.

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  • Bond Tests SGS

     ·  Bond F. C. "Crushing Tests by Pressure and Impact" Trans AIME Vol 169 1947 pp 58-66. 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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  • Using the Bond work index to measure operating comminution

     · Rowland C.A. 1978 "Determination and use of operating work indices in controlled grinding circuits–A proposed concept " Mill Operator s Conference and Exhibit Northwestern Branch Australasian Institution of Mining and Metallurgy Mt. Isa Queensland Australia June. Google Scholar

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  • Using the Bond work index to measure operating comminution

     · Rowland C.A. 1978 "Determination and use of operating work indices in controlled grinding circuits–A proposed concept " Mill Operator s Conference and Exhibit Northwestern Branch Australasian Institution of Mining and Metallurgy Mt. Isa Queensland Australia June. Google Scholar

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  • Bond Tests SGS

     · The test determines the Bond Ball Mill Work Index which is used with Bond s Third Theory of Comminution to calculate net power requirements . Various correction factors may have to be applied. W = Wi (10/√P10/√F) Where W = Net power consumption in kWh/t Wi = Bond work index

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  • GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

     · Stage Ball Mills or HPGr-Ball Mill(s)) Circuit F80 = 19 300µm P80 = 155µm W Total = 8.56 kWh/t . kWh/t . 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

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  • Comparison of UCS to Bond Work Indices

    FIGURE 8 ROD MILL/BALL MILL WORK INDEX RATIO v. UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS (MPa) 0 0.5 1 1.5 2 WiRM/WiBM (metric) Siddall et al (1996) identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore s compentency. Figure 8 plots this ratio versus UCS no trend is apparent

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  • Bond Tests SGS

     ·  Bond F. C. "Crushing Tests by Pressure and Impact" Trans AIME Vol 169 1947 pp 58-66. 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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  • MODELING THE SPECIFIC GRINDING ENERGY AND BALL

     · ENERGY AND BALL-MILL SCALEUP Ball-mill 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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  • Bond Index Ball Mill / Rod Mill BT 100 XLRETSCH

    The Bond Index conforming rod charge consists of 6 rods of 1.25" diameter and 21" length. 2 rods of 1.75" diameter and 21" length. 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.

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  • Ball Mill Design/Power CalculationLinkedIn

     · 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

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  • Bond S Work Index Ball Millmandzijowka.pl

    test method for bond ball mill work index 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

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  • test method for bond ball mill work index

    Test Method For Bond Ball Mill Work Index. kinetic grinding test approach to estimate the ball mill work the most important parameter in this empirical equation is the bond work index (wi) which expresses the resistance of a material to comminution..a new approach to bond grindability and work index the bond work index values (w i ) are calculated from the equation been tested and that now

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  • Bond S Work Index Ball Millmandzijowka.pl

    test method for bond ball mill work index 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

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  • Using the Bond work index to measure operating comminution

     · Rowland C.A. 1978 "Determination and use of operating work indices in controlled grinding circuits–A proposed concept " Mill Operator s Conference and Exhibit Northwestern Branch Australasian Institution of Mining and Metallurgy Mt. Isa Queensland Australia June. Google Scholar

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  • 1-day Technical SeminarCemNet

     · 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.

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  • GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

     · Stage Ball Mills or HPGr-Ball Mill(s)) Circuit F80 = 19 300µm P80 = 155µm W Total = 8.56 kWh/t . kWh/t . 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

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  • CORRELATION BETWEEN BOND WORK INDEX AND

     · The Bond s standard ball mill is used to determine the work index value of different samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80 passing 100 µm. If the breakage characteristics of a material remain constant over all size ranges the calculated work index would be expected to remain constant since it indicates the resistance of material to breakage. Nevertheless for most naturally raw materials differences exist in the breakage characteristics depending on particle size which can result in variations in 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

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  • GEOMETALLURGY APPLIED IN COMMINUTION TO

    2005) the SMC Test® drop weight test index (DWI) (Morrell 2004) the SAG power index (SPI®) (Starkey Dobby 1996) and Bond ball mill work index (BWI) (Bond 1961) provide unquestionable margin of design safety in the plant (David 2013). However this approach does not consider the inherent

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  • 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

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  • Work Index Determination for High Pressure Grinding Rolls

    cycle test akin to the Bond Ball mill work . index determination. The first cycle starts with minus 6 mesh ore removed since it is believed that the fines content can fill most of the voids allowing little room for rock breakage and piston movement. Without adequate piston

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  • Bond Work Index Formula-Equation911 Metallurgist

    Basic Equations
  • Comminution testingJKTechUniversity of Queensland

     · A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s). Sample requirements A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus 3.35 mm as required for the Bond Ball Mill Work Index test feed.

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  • test method for bond ball mill work index

    Test Method For Bond Ball Mill Work Index. kinetic grinding test approach to estimate the ball mill work the most important parameter in this empirical equation is the bond work index (wi) which expresses the resistance of a material to comminution..a new approach to bond grindability and work index the bond work index values (w i ) are calculated from the equation been tested and that now

    Chat Online
  • Bond Index Ball Mill / Rod Mill BT 100 XLRETSCH

    The Bond Index conforming rod charge consists of 6 rods of 1.25" diameter and 21" length. 2 rods of 1.75" diameter and 21" length. 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.

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