• Author / Uploaded
• Tsakalakis G. Konstantinos

• Categories
• Roca (geología)
• Minerales
• Geología económica
• Materiales naturales
• Materiales

Citation preview

Bond work index tables (wi) from various sources Prepared by K. G. Tsakalakis, Professor NTUA

Table of Materials Reported by Fred Bond1

2

1

Material

Number Tested

Andesite Barite Basalt Bauxite Cement clinker Cement (raw) Coke Copper ore Diorite Dolomite Emery Feldspar Ferro-chrome Ferro-manganese

6 7 3 4 14 19 7 204 4 5 4 8 9 5

adjusted from short tons to metric tonnes

Specific Gravity Ειδικό βάρος 2.84 4.50 2.91 2.20 3.15 2.67 1.31 3.02 2.82 2.74 3.48 2.59 6.66 6.32

Work Index (kWh/t) 20.12 6.32 18.85 9.68 14.95 11.59 16.73 14.03 23.04 12.42 62.50 11.90 8.42 9.15

Table of Materials Reported by Fred Bond1

3

Material

Number Tested

Ferro-silicon Flint Fluorspar Gabbro Glass Glass Gneiss Gold ore Granite Graphite Gravel Gypsum rock Iron ore – hematite Hematite-specularite

13 5 5 4 4 4 3 197 36 6 15 4 56 3

1

adjusted from short tons to metric tonnes

Specific Gravity Ειδικό βάρος 4.41 2.65 3.01 2.83 2.58 2.58 2.71 2.81 2.66 1.75 2.66 2.69 3.55 3.28

Work Index (kWh/t) 11.03 28.84 9.82 20.34 13.57 13.57 22.19 16.46 16.59 48.02 17.70 7.42 14.25 15.26

Table of Materials Reported by Fred Bond1

4

1

Material

Number Tested

Hematite – Oolitic Magnetite Taconite Lead ore Lead-zinc ore Limestone Manganese ore Magnesite Molybdenum ore Nickel ore Oilshale Phosphate rock Potash ore Pyrite ore Pyrrhotite ore

6 58 55 8 12 72 12 9 6 8 9 17 8 6 3

adjusted from short tons to metric tonnes

Specific Gravity Ειδικό βάρος 3.52 3.88 3.54 3.45 3.54 2.65 3.53 3.06 2.70 3.28 1.84 2.74 2.40 4.06 4.04

Work Index (kWh/t) 12.49 10.99 16.09 12.93 11.65 13.82 13.45 12.27 14.11 15.05 17.46 10.93 8.87 9.84 10.55

Table of Materials Reported by Fred Bond1

5

1

Material

Number Tested

Quartzite Quartz Rutile ore Shale Silica sand Silicon carbide Slag Slate Sodium silicate Spodumene ore Syenite Tin ore Titanium ore Trap rock Zinc ore

8 13 4 9 5 3 12 2 3 3 3 8 14 17 12

adjusted from short tons to metric tonnes

Specific Gravity Ειδικό βάρος 2.68 2.65 2.80 2.63 2.67 2.75 2.83 2.57 2.10 2.79 2.73 3.95 4.01 2.87 3.64

Work Index (kWh/t) 10.56 14.96 13.98 17.49 15.54 28.52 10.35 15.76 14.88 11.43 14.47 12.02 13.59 21.30 12.74

6

7

8

9

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)