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Ilyich R.V.,Mekhanobr Orgsintez Reagent CJSC | Pavlovich K.V.,Kvadrat Plyus CJSC | Yurievna S.Y.,Kvadrat Plyus CJSC
Obogashchenie Rud | Year: 2013

The results of theoretical and experimental studies on application of aerofloats are analyzed, revealing their highly selective action in separation of base metals sulfides from iron sulfides. The mechanism of reagents interaction with minerals is shown, consisting in formation of coordination compounds through transition of undivided pairs of electrons of sulfur to unoccupied orbitals of metals in mineral lattice. A high efficiency of fine mineral particles flocculation with application of aerofloats with chain length ?4-?12, synthesized by the authors, if compared with butyl aerofloat, is shown. The conducted studies permitted to synthesize aerofloats of BTF series, featuring different collecting proper- ties. The results of laboratory and commercial-scale testing of BTF-152, BTF-1522, BTF-1541, BTF-1711 aerofloats are presented, verifying, that in comparison with butyl xanthate they provide for a considerable increase in copper recovery (by 2.2-5.1 %) from copper and copper-nickel ores, as well as total gold and silver (by 3.2-14 %) from different types of silver and gold-containing ores.

Ryaboy V.I.,Mekhanobr Orgsintez Reagent CJSC | Shepeta Y.D.,Russian Academy of Sciences | Kretov V.P.,Kvadrat plyus CJSC | Golikov V.V.,JSC Polymetal Engineering
Obogashchenie Rud | Year: 2014

BTF-1522, -1552, -163, -175 reagents-collectors and their certain analogues were synthesized and tested. Effects of their surface-active prop- erties and hydrophobization ability upon flotation activity were studied. All reagents contained sodium dialkyldithiophosphates as one of their main components. Surface activity of the reagents' 1% water solution at liquid-gas interface (l-g) was determined by stalagmometric method with respect to all tested reagents, and regarding BTF-163, -1552, -152 reagents, surface tension of their water solutions was also determined as a function of concentration. Hydrophobization ability was estimated mostly qualitatively. It is shown, that in the range of the studied reagents, a stronger collector is characterized by a higher surface activity, and, correspondingly, a more selective collector - by a lower sur- face activity at liquid-gas interface. On the ground of this dependence, BTF-1522 is proposed to be applied in copper-zinc ore flotation as selective collector, BTF-1552 - in silver-bearing ores flotation, BTF-1532 - in copper-nickel ore flotation. BTF-163 is the strongest collector in copper and gold-bearing ores flotation. BTF-1522 and -163 reagents were brought into commercial practice.

Ryaboy V.I.,Mekhanobr Orgsintez Reagent Ltd. | Shepeta E.D.,Russian Academy of Sciences | Kretov V.P.,Kvadrat plyus CJSC | Levkovets S.E.,Kvadrat plyus CJSC | Ryaboy I.V.,Mekhanobr Orgsintez Reagent Ltd.
Obogashchenie Rud | Year: 2015

The effect of surface activity at liquid-gas interface and hydrophobization ability of dialkyldithiophosphates class reagents-collectors upon their flotation activity was qualitatively established. It is shown, that maximum recovery of sulfides is achieved with high hydrophobization ability and surface activity of reagents, and selectivity - with low hydrophobization ability and high or low surface activity, depending on the type of mineral selection. A highest recovery of metals was achieved in gold-bearing silver ore flotation with IMA-I207 reagent, possessing a highest surface activity. In separation of copper minerals from arsenopyrite, a highest selectivity was achieved with application of IMA-226 reagent, possessing a highest surface activity and lowest hydrophobization ability. In separation of copper-zinc ores, most selective is BTF-1522 reagent, characterized by the lowest hydrophobization ability and surface activity. BTF-1552 reagent and its analogue BTF-1532, introduced in coppernickel ores flotation, possess similar properties.

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