Unveiling the Link between the Third Law of Comminution and the Grinding Kinetics Behaviour of Several Ores

Victor Ciribeni,Matías Paez,Regina Bertero,Juan M Menéndez-Aguado,Alfredo L Coello-Velázquez,Enzo Avellá,Andrea Tello

doi:10.3390/met11071079

Victor Ciribeni, Matías Paez + Show 5 more

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https://doi.org/10.3390/met11071079

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Abstract

As a continuation of a previous research work carried out to estimate the Bond work index (wi) by using a simulator based on the cumulative kinetic model (CKM), a deeper analysis was carried out to determine the link between the kinetic and energy parameters in the case of metalliferous and non-metallic ore samples. The results evidenced a relationship between the CKM kinetic parameter k and the grindability index gbp; and also with the wi, obtained following the standard procedure. An excellent correlation was obtained in both cases, posing the definition of alternative work index estimation tests with the advantages of more straightforward and quicker laboratory procedures.

Highlights

The importance of work index determinations in mineral ores comminution operations is without any doubt
The cumulative kinetic model is the simple solution defined by Laplante [21], for the equation proposed by Loveday [22] as a first-order kinetic equation
P100 = 74 μm; estimated values by simulation differ less than 4%

Summary

Introduction

The importance of work index determinations in mineral ores comminution operations is without any doubt. The methodology proposed by F.C. Bond [1] is widely used in grinding equipment design and calculations. The crucial point is that it was developed on an enormous data quantity, both at laboratory and industrial scales, yielding sound and reliable results. This fact provided Bond’s methodologies with great prestige from its inception and, despite many attempts to develop a technique to replace it over time, it established itself as an essential tool for design and sizing the reduction stages of hundreds of metallurgical plants around the world. The Bond proposal has some shortcomings, pointed out by Gutierrez and Sepulveda [2], Aksani and Sömmez [3] and Menendez Aguado et al [4], which are summarized below:

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