comparative bond ball mill work index

  • Makat KatomSenior MetallurgistGlencore CSA Mine

    •Better rod/ball charge monitoring and control on rod/ball mills have increased liners life from 12 months to 15 months and total grinding media consumption decreased by 17 . •Re-commissioned and calibrated PSI200 and provided online operating work index on DCS to help in optimizing the milling circuit.

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  • essa laboratory jaw crusher model jc2500BINQ Mining

     · High PerformanceFine ProductReliable Jaw Crusher The Model . The Model JC2500 jaw crusher has evolved from Essa crusher.Essa Australia are able to to the laboratory extraction system. »More detailed

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    Bond Tests SGS Australia

    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.

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  • Laboratory Comparative Work Index SGS

    The Laboratory Comparative Work Index gives an approximate Bond Work Index for an ore sample. This can then be used with Bond s Third Theory of Comminution to calculate net power requirements needed for grinding. The test depends on laboratory batch grinding and uses a comparison with the grinding of an ore of a known Bond Work Index.

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  • Flue gas desulfurization chemistry studies limestone

    The results of the laboratory ball mill test were compared to the results of an industrial grinding test the Bond Work Index for six samples which covered the grindability range. The two tests compared well with a correlation coefficient greater than 0.9.

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  • THE BOND WORK INDEX OF LIMESTONE AND ANDESITE

     · Bond work index value of these components mixtures is greater than the Bond work in-dex of harder components clinker. Oner (2000) have conducted a research of clinker and blast furnace slag mixture Bond Work Index in different mass propor-tions. He found out that these values are always lower than the Bond Index obtained

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  • University of Belgrade Serbia Mineral and Recycling

    the optimal ball diameter in a mill This paper covers theoretical and experimental explorations for the sake of determining the optimal ball charge in mills. In the first part of the paper on the basis of the theoretical analysis of the energy-geometric correlations which

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  • A Comparison of Test Procedures for Estimating the Bond

     · The Bond ball work index is widely used in the field of minerals processing as an indicator of ore standard Bond test mill for a pre-determined number of revolutions. The feed and product particle Comparative test work on the two methods was conducted on three copper–cobalt samples

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  • Determination of Work Index of Gyel-Bukuru Columbite

     · The most widely used parameter to measure ore grindability is the Bond work index W i 6 . Work index is the energy required in kWh/short-ton to reduce a given material from theoretically infinite size to 80 passing size 100 microns 7 . The determination of work index using Bond s method can be compared to the method of

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  • Laboratory magazine articles and reports for download

    The Emax is an entirely new type of ball mill which was specifically designed by RETSCH for high energy milling. The impressive speed of 2 000 min-1 so far unrivaled in a ball mill in combination with the special grinding jar design generates a vast amount of size reduction energy. Thanks to the new liquid cooling system excess thermal

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  • Bond Work Indexan overview ScienceDirect Topics

    The ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index. For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill (see Figure 3.10) a question arises as to whether this practice will alter the ball mill work index (BW i) of the material

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  • SciELOBrasilDevelopment of ball mill test for

    The Bond method for ball mil designing has been used for 60 years. Based on the Work Index test such method is applied mostly in traditional circuit configuration which includes multi-staged crushing followed by rod and ball milling. Table 2 shows ball top sizes for surveyed industrial circuits as well as respective ball mill power that

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  • Canadian Mineral Processors Examine the Fine Art of

     · It has proven its ability to compare Bond and SPI methods in rating SAG and ball mill capacities and hence to compare the limitations of each. More on Bond and SPI. The value of using the Bond work index and SPI at Kinross remote Kubaka gold project in Russia was reported by John Starkey of Starkey Associates. As the temperature in

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  • Process models for simulation of Bond tests Mineral

     · A comparative analysis was made with simulation results using various methodologies of the ball mill Bond test based on real values of the work index. This analysis was carried out with various minerals in a wide range of grindability. The results show that simulation can be considered another indirect way of work index determination but

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  • QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

     · micrometers in size. According to the Bond standard procedure the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250 circulating load (Bond 1949 1952 1961). The test is performed on a raw material approximately weighing 10 kg which coarseness is 100 -3.327 mm.

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  • O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

     · 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 in the wet autogenous mill — central discharge ball mill circuit (WAM — CDBM) In the framework of the discussed method total

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  • Microwave Heating Applications in Mineral Processing

     · Comparative bond rod mill work index was used to determine the effect of this process on the grinding energy required for size reduction of the material in a laboratory rod mill. It is shown after 1 3 and 5 minute radiation respectively the amount of 12 34 and 46 reduction in work index was achieved.

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  • (PDF) A quick method for bond work index approximate

    The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial

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  • Insights on pretreatment of Indian hematite fines in grate

     · Bond work index of ball mill. In this paper the standard Bond method was used to measure the Bond work index (W i) by ball milling to estimate the grindability of Indian hematite fines 11 12 13 . In addition W i of a common hematite fine widely used in steels namely BHC was also determined as a comparison value.

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  • Simulation of clinker grinding circuits of cement plant

     · Particle size distributions of obtained samples from several sampling campaigns were determined and raw data were mass balanced before being used in simulation studies. After determination of breakage function selection function Bond work index residence time distribution parameters and Whiten s model parameters for air separators and diaphragms between the two compartments of tube ball

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  • Maja S Trumic University of Belgrade SerbiaAcademia.edu

    The Bond work index W i is defined in a Bond ball mill on the samples of standard size −3.327 0 mm. In practice it is possible to find materials of non-standard size that are finer than 3.327 mm.

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  • Microwave Heating Applications in Mineral Processing

     · Comparative bond rod mill work index was used to determine the effect of this process on the grinding energy required for size reduction of the material in a laboratory rod mill. It is shown after 1 3 and 5 minute radiation respectively the amount of 12 34 and 46 reduction in work index was achieved.

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  • GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

     · Bond Work Index Testing Equipment and Procedures See Annexes A B and C for Bond crushing rod mill and ball mill test equipment and procedures. Accuracy of Comparative Circuit Work Index Efficiency Determinations This will follow in an addendum to this guideline Sub-topics will

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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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  • Metallurgical TestingALS Laboratory testing

     · ••Bond abrasion index ••Bond ball mill work index ••Bond impact crushing work index ••Bond rod mill work index ••Comparative work index ••High pressure grinding rolls (HPGR) up to 10tph ••Inferred work index ••JK drop-weight test SMC test ••Levin open circuit grindability ••Pilot SABC (AG/SAG) up to 4tph

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  • (PDF) A comparative study on the effect of using

    Compared to the JC products the HPGR products showed a better degree of liberation and lower Bond ball mill work index (BWI) although the difference gradually decreased with increasing fineness

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  • Metallurgical TestingALS Laboratory testing

     · ••Bond abrasion index ••Bond ball mill work index ••Bond impact crushing work index ••Bond rod mill work index ••Comparative work index ••High pressure grinding rolls (HPGR) up to 10tph ••Inferred work index ••JK drop-weight test SMC test ••Levin open circuit grindability ••Pilot SABC (AG/SAG) up to 4tph

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  • Comminution Research PapersAcademia.edu

    relative work index (RWI) standard Bond work index (Wi) and grindability index (GI) together with the breakage and selection functions were utilized to assess the grinding efficiency and its kinetics of the untreated and MWpretreated (at a constant power of 0.9 kW) samples. Bond work indices were

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