A study on the relationship of rock strenght and grindability of limestone, granite and metallic ore
Loading...
Date
2018-06
Authors
Rozaida Ahmad Romil
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The grindability of rock samples depends on both the mechanical properties of the
materials being ground and the mechanism of grinding. Rock strength is one of the
mechanical properties of rock, and it is defined as the maximum value of stress at which
the rock fails. This study has been carried out with the aim to study the effect of rock
strength on the Bond work index of different rock sample. Point load test was carried out
to determine the point load strength index and to estimate the uniaxial compressive
strength of the rock sample. While, Bond ball mill grindability test was performed to
determine the Bond grindability work index of the rock sample. The relationship between
rock strength and grindability of different rock sample was determined based on the
correlation of compressive strength and Bond grindability work index. There is a strong
correlation found between the compressive strength of tested rock and the Bond work
index according to the equation Wi = 36.95ln(x) – 62.31 and Wi = 36.95ln(x) – 179.76
with the correlation coefficient 92%. From this study, it is found that there are a strong
relationship between rock strength and grindability of limestone, granite and metallic ore.