A study on the production of high quality aggregates from metso barmac rock on rock vertical shaft impact crusher and cone crusher
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Date
2009
Authors
Amir, Mahathir
Journal Title
Journal ISSN
Volume Title
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Abstract
A study was conducted to evaluate the performance of cone crusher and Metso Barmac
VSI crusher in producing high quality aggregates. Various analyses were completed to
study the characteristics of crushed products such as shape (Elongation Index (EI);
Flakiness Index (FI); and voids content analysis), size distribution, surface texture
(Scanning Electron Microscopy (SEM)) and strength (Aggregate Crushing Value (ACV)
and Aggregate Impact Value (AIV)). A study was also conducted to evaluate a good rock
build-up formation in influencing the crushing mechanism. Crushed products of Feed B
displayed better results compared to the crushed products of Feed A. Crushing with CSS
of 12mm and increasing the feed rate of the cone crusher to 2.6 t/h which was the choked
feeding crushing, gave improvement to the characteristics of crushed products in terms of
shape and surface texture with EI and FI values of 31.25% and 16.29% respectively.
ACV and AIV analyses showed values of 19.58% and 24.42% respectively. Operating
the Barmac crusher at 60 Hz rotor speed and 0% cascade ratio was found to produce
crushed products with lower percentage of EI and FI which were 19.96% and 12.02%
respectively compared to the cone crusher. Similarly, lower values of ACV and AIV were
obtained, which were 15.61% and 21.06% respectively. Overall, Barmac crusher was
capable to produce better quality of products in terms of shape and surface texture
compared to the cone crusher.
Description
Master
Keywords
Biological Science , Metso barmac rock , Cone crusher