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- Banda, S.M. Herath
(författare)
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Pressure filtration
- 1986
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Ingår i: Workshop i mineralteknik. - : MinFo. ; , s. 45-61
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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- Banda, S.M.Herath, et al.
(författare)
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Pressure filtration of a fine-grained chalcopyrite concentrate
- 1988
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Ingår i: Scandinavian journal of metallurgy. - 0371-0459 .- 1600-0692. ; 17:2, s. 61-66
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Tidskriftsartikel (refereegranskat)abstract
- How material properties, cake characteristics and operating parameters affect the filtration rate and the final moisture content was investigated by laboratory test with a concentrate from a complex sulfide ore. Porosity and pore size distribution were measured by automatic image analysis. With optimum conditions, a moisture content of 5. 5% was achieved. A copper/lead concentrate floated from a complex sulfide ore at the Stekenjokk concentrator of Boliden Mineral AB, Sweden was used.
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- Banda, S.M.Herath, et al.
(författare)
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Structure variation in filter cakes from flocculated slurries
- 1988
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Ingår i: Scandinavian journal of metallurgy. - 0371-0459 .- 1600-0692. ; 17:2, s. 57-60
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Tidskriftsartikel (refereegranskat)abstract
- To flocculate slimy material dispersed in water is a common operation in mineral processing either to recover the material or to clear the water. In laboratory tests with flocculated slurries, floc sizes, porosity and sizes of filter cakes were measured by automatic image analysis. An observed decrease in filtrate flow rate at flocculant overdosage was not caused by a smaller mean floc size but may have been due to an obstruction of the pore channels by adsorbed polymer threads. Samples of a copper/lead concentrate floated at the Stekenjokk concentrator of Boliden Mineral AB, Sweden, were used for this investigation.
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- Banda, S.M.Herath, et al.
(författare)
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Variation of filter cake permeability with mean pore diameter of the cake
- 1998
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Ingår i: Scandinavian journal of metallurgy. - 0371-0459 .- 1600-0692. ; 17:2, s. 67-72
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that most particles in a filter cake have more than only point contact with each other. Therefore, the Kozeny-Carmen equation is modified by relating permeability to porosity and a mean pore diameter as measured by automatic image analysis in horizontal cross sections of the cake. In filter cakes of chalcopyrite and magnetite, the permeability increases stepwise with the product of porosity and square mean pore diameter.
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