ABSTRACT PLK (Partially Laterised Khondalite) rock is a general terminology used in this paper for those
rocks which are in general associated in bauxite mining such as Partially Altered Khondalite
(PAK) rocks, Partially Kaolinised Khondalite (PKK) rocks and Lithomerge. This paper deals
with the Bond’s work index, Hardgrove index and Brittleness tests on six typical rock samples
and its correlation. As a fast method, the determination of the Bond index from the Hardgrove
index (by calculation) is almost matching with measured Bond’s work index. The Bond’s work
index of the above rock samples calculated from the Hardgrove index value has shown a
variation from 7.7 to 10.3 kWh/sh.t. A correlation is found between the friability value and work
index. The correlation coefficient of 0.93 between the friability value (S1) and Bond’s work index, Wi = -18.193 Ln (S1) + 66.747 has been found. The brittleness test results may not be very close to the work index values, as in brittleness tests relatively large grains are ground, whereas the HGI values, grinding of fine –grain samples involved. Thus the grindability of PLK rocks or bauxite can be determined by the simple test performance, HGI.
Cite this paper
R. Swain and R. Rao, "Alternative Approaches for Determination of Bond Work Index on Soft and Friable Partially Laterised Khondalite Rocks of Bauxite Mine Waste Materials," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 9, 2009, pp. 729-743. doi: 10.4236/jmmce.2009.89063.
NALCO brocher (2008) “A profile on National Aluminium Company” Bhubaneswar.
Rao R. Bhima., Swain Ranjita., Prasad A. R., Prakash S., Rao K.K., Das S.K., Das B., Reddy P.S.R., Mishra C.R and Pani B.S. (2006) “Utilization of partially laterised khondalite rocks for refractory applications” 60th NMD-ATM, pp 6-7.
T/MPET/515/July/ (2005) Collaborative project report of IMMT and NALCO, Bhubaneswar “Studies on production of value added materials from partially laterized khondalite” Phase I.
T/MPET/554/April/ (2006) Collaborative project report of IMMT and NALCO, Bhubaneswar “Studies on production of value added materials from partially laterized khondalite” Phase II.
T/MPD/598/March/ (2007) Collaborative project report of IMMT and NALCO, Bhubaneswar “Studies on production of value added materials from partially laterized khondalite” Phase III.
Csoke B., Hatvani Zoltan., Papanastassiou D., and Solymar Karoly. (2004) “Investigation of grindiability of diosporic bauxites in dry, aqueous and alkaline media as well as after high pressure crushing” Int. J. Miner. Process 74S, pp 123-128.
Ozkahraman T and Sirin M (1998) “The use of brittleness test in determination of grindiability and crushing resistance of rocks and marbles” Innovations in mineral and coal processing, pp 33-36.
Ozkahraman H. T. (2005) “A meaningful expression between bond work index, grindiability index and friability value” Mineral Engineering 18, pp 1057-1059.
Sener S. and Ozbayoglu (1998) “Effect of heat treatment on grindiability of ulexite” Innovative in Mineral and Coal processing, pp 29-31.
Bond F. C. (1954) “Crushing and Grinding Calculations” CIM Bulletin, Vol. 47, No 507, pp. 466-472.
Bond, F.C, (1961) “Crushing and Grinding Calculations” Part I, Br. Chem. Eng? Vol. 6, No. 6, s. 378-385,.
Safonav A. I., Suss A. G., Panov A. V., Luk’yanov I. V., Kuznestova N. V. and Damaskin, A. A. (2009) “Effect of process parameters on the grindability and Bond index of bauxites and alumina-bearing ore” Metallurgist, Vol. 53, Nos. 1-2, p 57.
Mucsi Gabor. (2008) “Fast test method for the determination of the grindability of fine materials” Chemical engineering research and design, Vol. 86, No. 4, pp 395-400.
Magdalinovic N. (2003) “Abbreviated test for quick determination of Bond’s work index” journal of Mining and Metallurgy A: Mining, p 1.
Taylor and Francis Group (2007) “Powder handling and operations part - 1” LLC, pp 3-4, p7& p10.
Yin Wanzhong., Han Yuexin., Wei Xinachao., Yuan Zhitao and Yu Fujia. (2004) “Research on selective grinding behaviours of bauxite” Mining science and technology, pp 577-581.
Levin J. (1989) “Observations on the Bond standard grindiability test, and a proposal for a standard grindiability test for fine materials” J. S. Afr. Min. Metall., Vol. 89, no. 1, pp 13-21.
Haese U., Scheffler P and Fasbander H. (1975) ZEMENT-Kalk-Gips 8, pp 316-324.
Hower James. C. (1990) “Hardgrove grindability index and petrology used as an enhanced predictor of coal feed rate” CAER – University of Kentucky, Center for Applied Energy research, Vol. 1, No. 6, pp 1-2.
ACARP “Hardgrove grindability index” Unit 1, pp 1-6.
Altindag R. (2003) “Correlation of specific energy with rock brittleness concepts on rock cutting” The J. of the south African Institute of Mining and Mettalurgy, pp 163-172.
Tamrock. (1984) “Handbook on surface drilling and blasting” Painofaktorit, Finland, pp 308.
Prasher C. L. (1987) “Crushing and grinding process handbook” John Wiley & Sons Ltd.,New York, p 474.
Tichanek Frantisek. (2008) “Contribution to determination of coal grindability using Hardgrove method” Volume LIV, No. 1, pp 27-32.
McIntyre, A and Plitt, L.R. (1980) “The interrelationship between Bond and Hardgrove grindabilities” CIM Bulletin, pp 149-155.
Hower, J.C., Barton, L.S and Moshier, S.O, (1992) “Application of the Hardgrove grindability index in carbonate characterization. Minerals and Metallurgical Processing”, pp 146-150.