Simple Approach to Estimation of the Work Index

Chakrabarti, D M (2000) Simple Approach to Estimation of the Work Index. Transaction of the Institute Min. Metall.(Sect. C: Mineral Process. Extr. Metall, 109 (2). pp. 83-89.

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Synopsis The work index of the mill feed of any mineral processing plant , determined according to the procedure prescribed by F. C. Bond in 1961 , is still considered useful for estimation of the required size and power of a mill, espe-cially in the preliminary phases of a feasibility study. The index, however, is no longer considered very important from economic or operational points of view. Moreover, sci-entific and technological advances in the design , oper-ation and control of comminution circuits have rendered very precise determination of the work index unnecessary . It is, therefore , considered logical to develop a simple method of obtaining a fair estimate of the index that does not require special equipment and experimental procedures. An approach is presented that is based on a statistical analysis of data accumulated over four decades of experimental determination of the work indices of a large number of ores, minerals and rocks. A simple model has been developed that correlates the work index of a mate-rial and the parameters of the Rosin-Rammler size distr-ibution of an experimental feed passing 6 mesh (-3327 gm). All that is needed is to crush a sample of the mill feed to -3327 pm, determine e size-distribution parameters from sieve analysis with the aid of a computer and compute the work index irons the correlation model.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Rosin-Rammler, Comminution Circuits
Divisions:Mineral Processing
ID Code:2990
Deposited By:Sahu A K
Deposited On:13 Jun 2011 17:36
Last Modified:14 Dec 2011 11:01
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