This study aims to characterize the whole reaction process of (i) emulsion explosive matrix and sulfide ores, and (ii) ammonium nitrate and pyrite by the thermodynamics analysis method. A series of experiments were carried out at atmospheric pressure from 25 °C to 350 °C at four heating rates (3, 5, 10, and 15 K/min) and the Coats–Redfern method wa...
Introduction 2. Nickel production process 2.1.Laterite processing 2.2.sulfide processing 2.3.Ni Secondary resources 3. Disadvantages and alternative technologies 4. Strategies to improve nickel extraction 5. Conclusion and recommendation
Published in Petrology
AbstractHigh-precision analysis of sulfur isotope composition was carried out for sulfide fractions from ten samples of olivine gabbronorite that composes a thick (approximately 300 m) swell of a ore-bearing apophysis that is parallel to the basal part of the Yoko-Dovyren massif in northern Baikal area, Russia. The δ34S values were found out to wid...
Published in Petrology
AbstractIntrusions of the Zubovsky type (1) are commonly dominated by troctolite in their ultramafic parts and have an insignificant number (if any) of ultramafic units; (2) occur among olivine and olivine-bearing gabbro-dolerites and often show evidence of a number of accumulation of cumulus olivine, (3) have weakly pronounced (if any) taxitic gab...
Published in Geology of Ore Deposits
Abstract—Gold and silver are capable of forming stable natural compounds with different elements. For gold 36 minerals are known: 10 in the class “Native metals, intermetallic compounds” and 26 in the class “Sulfides (selenides, tellurides, arsenides, antimonides, bismuthides).” For silver, 194 minerals are registered in the MMA, presented in 8 cla...
Published in Russian Chemical Bulletin
In order to study the mechanism of interaction of 4-(2-thiazolylazo)catechol with natural sulfides specifically with sulfides of various metals, the complexation of this azo compound with copper(II), cobalt(II), nickel(II), and zinc(II) ions in aqueous solutions was investigated. The reagent forms positively charged complexes with metal ions in the...
Published in Doklady Earth Sciences
AbstractThe present paper presents new U–Pb and Sm–Nd age data obtained for granulites of the Cheremshanskaya Unit enclosing metamorphosed volcano-sedimentary sulfide ores, in which sulfur isotope mass-independent fractionation (MIF–S) was established. Zircons from orthotectites that cut hosted paragranulites yielded aconcordant U–Pb age of 1866.8 ...
Published in Russian Journal of Applied Chemistry
Heterocyclic and aromatic azo derivatives of pyrocatechol, resorcinol, and salicylic acid have been investigated as collectors for the flotation of sulfide ores. The acid-base properties of the compounds were studied, their solubility in an alkaline solution was determined. It was established that the fixing of reagents on the surface of the ore oc...
Published in Journal of Analytical Chemistry
A possibility of the direct determination of palladium in dissolved samples of platinum sulfide ores by high-resolution electrothermal atomic absorption spectrometry with a continuous light source without preconcentration and separation from the matrix components is investigated. The conditions of analysis are selected and a procedure for the deter...
We report on the first zircon hafnium-oxygen isotope and trace element study of a transect through one of the largest terrestrial impact melt sheets. The differentiated melt sheet at the 1.85 Ga, originally ca. 200 km in diameter Sudbury impact crater, Ontario, Canada, yields a tight range of uniform zircon Hf isotope compositions (epsilon Hf( 1850...
