gangue minerals, thus leading to nickel loss. Flotation Practice in Nickel Sul\de Deposits Nickel sulRde minerals such as pentlandite can, in general, be separated from their gangue by Sotation using a thiol group of collectors like xanthates and alkyl dithiophosphates in the presence of variety of activators, depressants and dispersants. Since nickel
different levels was investigated. Therefore, the main objective of the study was to optimize the process parameters for the flotation of base metals from a nickel-copper sulphide ore. 2. Materials and Methods 2. 1. Materials The nickel-copper sulphide ore used in this study was supplied by Trojan Nickel Mine located in Bindura, Zimbabwe. From the X-ray diffraction analysis, the main phases present in the ore
One process is the ammonia pressure leach, in which nickel is recovered from solution using hydrogen reduction, and the sulfur is recovered as ammonium sulfate for use as fertilizer. In another, the matte may be roasted to produce high-grade nickel oxides; these are subjected to a pressure leach, and the solution is electro- and carbonyl refined.
In hydrometallurgical processes, nickel sulfide ores undergo flotation (differential flotation if Ni/Fe ratio is too low) and then smelted. After producing the nickel matte, further processing is done via the Sherritt-Gordon process. First, copper is removed by adding hydrogen sulfide, leaving a concentrate of only cobalt and nickel. Then, solvent extraction is used to separate the cobalt and nickel, with the final
In cases such as the Sudbury deposit, where the copper content of the ore is almost equal to that of nickel, the concentrate is subjected to a second selective flotation whereby the copper is floated to produce a low-nickel copper concentrate and a
The Nickel West Mount Keith Operation (NMK) consists of a large, low grade disseminated nickel sulfide orebody treated by crushing and two staged closed circuit grinding (SAG & Ball Mills), followed by a complex split-size rougher, scavenger and cleaner flotation circuit (Figure 2).
The nickel and cobalt metallurgy processes begin with an initial treatment of the mineral, re-concentrating it through crushing and flotation/gravity and obtaining a “speiss”, rich in cobalt and nickel. The process begins by adding the sulfide-associated mineral to a reactor with sulfuric acid and pressurised air. This procedure removes the sulphides to obtain nickel (II) sulfate and cobalt (II) sulfate in solution. In this
deposits are often reasonable (0.6 to 0.9%).The problem has been related to processing; the conventional flotation process on low-grade disseminated sulphide ores tends to be difficult due in large part to fines containing magnesium-rich serpentine type minerals which generate slimes during comminution. In most cases, treatment of such ores results in low nickel recovery and
APPLICATIONS • Mineral applications: the floatation process is most widely used in the mineral process industry to concentrate mineral values in the ores.most of the world’s copper, lead, zinc, molybdenum and nickel are produced from ores that are concentrated first by flotation. In addition, floatation is commonly used for the recovery of fine coal and for the concentration of wide range of mineral commodities
Originating in the mining industry for enrichment of ores, the flotation process developed in Europe for deinking has gained importance in North America. In this process, hydrophobic particles such as ink and small contaminants attach to air bubbles injected into the pulp and get carried upward to the froth while fibers remain in the bulk. The particles are separated from the pulp by removing the froth from the
Flotation Drying and smelting in electrical furnace Air/O 2 Base Metal Refiningblown Converters Sulphur Removal •Nickel •Copper •Cobalt Sulphate •Sodium Sulphate •Nickel sulphate Base Metal Refining (incl. Magnetic Concentration for some players) Precious Metal Refining •PGMs •Gold Incorporating PGMs into various end applications
A flowsheet has been developed for the production of rich concentrates of precious and non-ferrous metals by a complex treatment of the flotation products from South African platinum-containing chrome ores. The procedure involves: autoclave leaching, roasting, hydrochlorination and precious metal recovery by sorption. Autoclave oxidative leaching of the initial material allows the non-ferrous metals