Bond Work Index Tables (Wi)

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Here there are given tables from various sources for the Bond work index values of mining materials (ores, industrial minerals and rocks). These work indexes can be used for the determination of tumbling mills (rod, ball mills) power. Thus, the suitable mill dimensions can be effectively determined.

Transcript of Bond Work Index Tables (Wi)

  • Prepared by K. G. Tsakalakis, Professor NTUA

    Bond work index tables (wi) from various sources

  • Material Number Tested Specific Gravity Work Index (kWh/t)

    Andesite 6 2.84 20.12 Barite 7 4.50 6.32 Basalt 3 2.91 18.85

    Bauxite 4 2.20 9.68 Cement clinker 14 3.15 14.95 Cement (raw) 19 2.67 11.59

    Coke 7 1.31 16.73 Copper ore 204 3.02 14.03

    Diorite 4 2.82 23.04 Dolomite 5 2.74 12.42

    Emery 4 3.48 62.50 Feldspar 8 2.59 11.90

    Ferro-chrome 9 6.66 8.42 Ferro-manganese 5 6.32 9.15

    Table of Materials Reported by Fred Bond1

    1 adjusted from short tons to metric tonnes 2

  • Material Number Tested Specific Gravity

    Work Index (kWh/t)

    Ferro-silicon 13 4.41 11.03 Flint 5 2.65 28.84

    Fluorspar 5 3.01 9.82 Gabbro 4 2.83 20.34 Glass 4 2.58 13.57 Glass 4 2.58 13.57

    Gneiss 3 2.71 22.19 Gold ore 197 2.81 16.46 Granite 36 2.66 16.59 Graphite 6 1.75 48.02 Gravel 15 2.66 17.70

    Gypsum rock 4 2.69 7.42 Iron ore hematite 56 3.55 14.25

    Hematite-specularite 3 3.28 15.26

    Table of Materials Reported by Fred Bond1

    1 adjusted from short tons to metric tonnes 3

  • Material Number Tested Specific Gravity Work Index (kWh/t)

    Hematite Oolitic 6 3.52 12.49 Magnetite 58 3.88 10.99 Taconite 55 3.54 16.09 Lead ore 8 3.45 12.93

    Lead-zinc ore 12 3.54 11.65 Limestone 72 2.65 13.82

    Manganese ore 12 3.53 13.45 Magnesite 9 3.06 12.27

    Molybdenum ore 6 2.70 14.11 Nickel ore 8 3.28 15.05 Oilshale 9 1.84 17.46

    Phosphate rock 17 2.74 10.93 Potash ore 8 2.40 8.87 Pyrite ore 6 4.06 9.84

    Pyrrhotite ore 3 4.04 10.55

    Table of Materials Reported by Fred Bond1

    1 adjusted from short tons to metric tonnes 4

  • Material Number Tested Specific Gravity Work Index (kWh/t)

    Quartzite 8 2.68 10.56 Quartz 13 2.65 14.96

    Rutile ore 4 2.80 13.98 Shale 9 2.63 17.49

    Silica sand 5 2.67 15.54 Silicon carbide 3 2.75 28.52

    Slag 12 2.83 10.35 Slate 2 2.57 15.76

    Sodium silicate 3 2.10 14.88 Spodumene ore 3 2.79 11.43

    Syenite 3 2.73 14.47 Tin ore 8 3.95 12.02

    Titanium ore 14 4.01 13.59 Trap rock 17 2.87 21.30 Zinc ore 12 3.64 12.74

    Table of Materials Reported by Fred Bond1

    1 adjusted from short tons to metric tonnes 5

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  • From: SME Handbook of Mineral Processing, N.L. Weiss Editor, NY 1985., Page 30-71 , Sampling and Testing -Characterization of Test Samples

  • From the: G.C. Lowrison, Crushing and Grinding in Chapter 4 Energy Consumed in the Comminution Process, page 53, Butterworths, 1974, London

  • Approximate energy consumption in comminution, kWh/t (after Bond)

    Bond work index tables (wi)from various sourcesSlide Number 2Slide Number 3Slide Number 4Slide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12