A study on the separation of magnesite fines by magnetic carrier methods

Anastassakis, GN

dc.contributor.author	Anastassakis, GN	en
dc.date.accessioned	2014-03-01T02:41:34Z
dc.date.available	2014-03-01T02:41:34Z
dc.date.issued	1999	en
dc.identifier.issn	0927-7757	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30543
dc.subject	Carrier methods	en
dc.subject	Fine particles separation	en
dc.subject	Magnesite	en
dc.subject	Magnetic coating	en
dc.subject	Serpentine	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Coatings	en
dc.subject.other	Magnesite	en
dc.subject.other	Particles (particulate matter)	en
dc.subject.other	pH	en
dc.subject.other	Serpentine	en
dc.subject.other	Surface active agents	en
dc.subject.other	Surface properties	en
dc.subject.other	Magnetic carrier method	en
dc.subject.other	Magnetic coating	en
dc.subject.other	Separation	en
dc.subject.other	dodecylamine	en
dc.subject.other	magnetite	en
dc.subject.other	serpentine	en
dc.subject.other	surfactant	en
dc.subject.other	conference paper	en
dc.subject.other	magnetism	en
dc.subject.other	particle size	en
dc.subject.other	priority journal	en
dc.subject.other	suspension	en
dc.subject.other	zeta potential	en
dc.title	A study on the separation of magnesite fines by magnetic carrier methods	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/S0927-7757(98)00562-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0927-7757(98)00562-7	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The separation of magnesite fines from serpentine fines by magnetic carrier methods has been examined in this study. The zeta-potential of serpentine, magnesite and magnetite was measured with and without dodecylamine as surfactant. The interaction energies between the particles were then calculated. Without the surfactant, no magnetic coating was obtained despite the favourable predictions for narrow pH ranges. When surfactant is added in suspensions of separate minerals, the serpentine particles obtain a magnetic coating strongly attached to the surface in the range 6<pH<11 while the magnesite particles obtained a weak and limited extension coating only for pH>9. The experimental results are in excellent agreement with the theoretically predicted results for serpentine and in fairly good agreement for magnesite. When artificial mixtures of serpentine and magnesite were used, the metallurgical results are slightly different from the results on separate minerals. Copyright (C) 1999 Elsevier Science B.V.The separation of magnesite fines from serpentine fines by magnetic carrier methods has been examined in this study. The zeta-potential of serpentine, magnesite and magnetite was measured with and without dodecylamine as surfactant. The interaction energies between the particles were then calculated. Without the surfactant, no magnetic coating was obtained despite the favourable predictions for narrow pH ranges. When surfactant is added in suspensions of separate minerals, the serpentine particles obtain a magnetic coating strongly attached to the surface in the range 6 < pH < 11 while the magnesite particles obtained a weak and limited extension coating only for pH > 9. The experimental results are in excellent agreement with the theoretically predicted results for serpentine and in fairly good agreement for magnesite. When artificial mixtures of serpentine and magnesite were used, the metallurgical results are slightly different from the results on separate minerals.	en
heal.publisher	Elsevier Science Publishers B.V., Amsterdam, Netherlands	en
heal.journalName	Colloids and Surfaces A: Physicochemical and Engineering Aspects	en
dc.identifier.doi	10.1016/S0927-7757(98)00562-7	en
dc.identifier.isi	ISI:000079545100072	en
dc.identifier.volume	149	en
dc.identifier.issue	1-3	en
dc.identifier.spage	585	en
dc.identifier.epage	593	en