ERE - 2013http://dl.lib.uom.lk/handle/123/182932024-03-29T05:54:29Z2024-03-29T05:54:29Z7th National Conference on Earth Resources Management (Pre Text)http://dl.lib.uom.lk/handle/123/212712023-10-12T21:49:57Z2013-07-01T00:00:00Z7th National Conference on Earth Resources Management (Pre Text)
Hemalal, PVA
2013-07-01T00:00:00ZProceedings of the 7th National Conference on Earth Resources Management [Pre Text]http://dl.lib.uom.lk/handle/123/184372022-10-20T05:31:16Z2013-07-01T00:00:00ZProceedings of the 7th National Conference on Earth Resources Management [Pre Text]
Hemalal, PVA
2013-07-01T00:00:00ZDesign of a low cost magnetic separator for local beach sand separationBoralugoda, BPDUdowita, UGKPBSayanthan, KRohitha, LPShttp://dl.lib.uom.lk/handle/123/184362022-10-20T05:41:32Z2013-07-01T00:00:00ZDesign of a low cost magnetic separator for local beach sand separation
Boralugoda, BPD; Udowita, UGKPB; Sayanthan, K; Rohitha, LPS
Hemalal, PVA
Study had been carried out to identify beach sand minerals available
locally. Principles, cost, and design feasibilities of industrially used magnetic
separators were reviewed. As the best suit for requirements permanent drum
magnetic separator was chosen. Software aided separator design was prepared
based on reversed engineering concept, in the purpose of building fully
functional prototype. Material selection was carried out. According to basic
CAD drawing, prototype was built with necessary design adjustments.
Magnetic drum is 20 cm (0) x 40 cm, which yields a magnetic force field nearly
0.1 T. Prototype proven to separate ferromagnetic minerals in beach sand. Flow
rate is nearly 15 kg/hour. Recovery of magnetite in silica-magnetite mixture is
about 50-60% in single batch process. Using drum direction of rotation opposite
to flow direction, highly magnetic susceptible material was removed with a
higher recovery.
2013-07-01T00:00:00ZFinding a new sampling method and studying its characteristics with respect to existing sampling methodsKumarasinghe, KJMDNanayakkara, SSYapa, YHPSMRohitha, LPShttp://dl.lib.uom.lk/handle/123/184352022-10-20T05:48:57Z2013-07-01T00:00:00ZFinding a new sampling method and studying its characteristics with respect to existing sampling methods
Kumarasinghe, KJMD; Nanayakkara, SS; Yapa, YHPSM; Rohitha, LPS
Hemalal, PVA
In mineral processing industry, quality of minerals has to be
measured in several stages of processing. In measuring the quality, obtaining
accurate samples is of prime importance in representing the bulk material.
There are number of sampling methods which are industrially used for mineral
sampling. But each of these methods has their own weaknesses that make some
of them inappropriate in using as the most suitable sampling method. Most of
them are human biased. Some sampling methods have simple protocol, but
their sample accuracy is low. More accurate methods require advanced
instruments and involve high cost and more time. Any sampling method to be
successfully used should not only be of highly accuracy, but should be simpler,
more cost effective, less time consuming and easier to be applied in the field as
well. If any sampling method with the above characteristics could be
introduced, it will be a good substitute for many existing methods. Through
literature studies combined with innovative ideas, it was possible to introduce a
new sampling method. This sampling method developed has the characteristics
of being simple and quick in operation, minimal effects due to segregation, high
accuracy, lesser equipment usage, cost effectiveness and less bias to operator
experience.
2013-07-01T00:00:00Z