Cobalt Recovery. Cobalt in the copper solvent extraction raffinate was recovered by (1) solvent extraction with Cyanex 272 (an alkyl phosphinic acid-type extractant), (2) stripping the loaded extract with electrolyte recycled from the cobalt electrowinning cell, and (3) returning the loaded strip liquor to the electrowinning cell for cobalt ...
Cobalt and nickel recovery from waste water. Regularities of cobalt and nickel ions precipitation from diluted solutions, similar with respect to these metals content in miningand smelting operations waste water, areHydrophobic precipitates, formed in this way, may be recovered by flotation in machines with low level of energy dissipation.
Recovery of copper and cobalt through flotation of tailings. The roughing flotation of tailings was achieved at laboratory (14 min) using a Denver D-12 mechanical machine with the impeller speed kept at 1350 rpm . The yields in copper and cobalt were studied versus the reagents dosage. ... Recovery of cobalt versus time and the reagents dosage.
Mintek has been working on the recovery of cobalt, and the associated valuable metals, from slags, since 1988, using DC-arc furnace technology to effect selective carbothermic reduction of the oxides of cobalt, nickel, copper, (and zinc, where present), while retaining the maximum possible quantity of iron as oxide in the slag.
Previous Bureau of Mines research to recover cobalt from the copper concentrates has included both hydrometallurgical and Cobalt Flotation studies. Hydrometallurgical schemes have utilized a ferric chloride solvent in an oxidative leach to treat the copper concentrate and leave the cobalt in a cobalt-enriched residue.
The present invention provides a method for recovering nickel and cobalt from the sulfide flotation concentrate. This method involves the formation of sulfuric acid in a solution of one flotation concentrate slurry and this slurry flotation concentrate chlorine leaching at atmospheric pressure, then subjected to oxidative pressure leaching at elevated temperature and acidic conditions.
RECOVERY OF COBALT AND COPPER FROM COMPLEX SULFIDE CONCENTRATES By R. O. Dannenberg,1 P. C. Gardner/ S. R. Crane/ and D. C. SeideP ABSTRACT The Bureau of Mines conducted laboratory investigations with the objective of developing an alternative process for recovering cobalt and copper from complex sulfide concentrates. Processes currently used de
The copper flotation step is inherently inefficient for cobalt, with recoveries typically from 40% for oxides up to 80% for sulphides, so there is a substantial amount of cobalt contained in tailings dams that could be recovered – e.g. the Kolwezi Tailings Project.
COBALT AND NICKEL RECOVERY FROM MISSOURI lEAD BELT CHALCOPYRITE CONCENTRATES by R. K. Clifford 1 and L. W. Higley, Jr.2 ABSTRACT Chalcopyrite (CuFeSz ) concentrates produced on the Lead Belt of Missouri typically contain 28 pct Cu and from 0.5 to 1.5 pct each of nickel and cobalt.
Cobalt sulfides occasionally occur in lead-zinc deposits in quantities sufficient to justify their recovery. Mineral processing. The most important sulfide sources, the copper-cobalt ores of Congo (Kinshasa) and Zambia, are processed in the conventional manner to produce a copper-cobalt concentrate.
Mineralogical analyses showed the cobalt present as a distinct mineral phase, predominately siegenite, amenable to a physical separation method such as froth flotation. Flotation was chosen for recovery because of easy adaptation by the mills.
Cobalt Flotation Recovery. The major cobalt source in the ore is the mineral siegenite. Separation and concentration of siegenite by froth flotation is complicated by the mineralogy of the ore. The siegenite is often present as an intimate replacement intergrowth with chalcopyrite (fig. 1), sphalerite, galena …
Fortunately, efforts made to increase the recovery and grade of nickel in flotation concentrate are rewarded by identical increases in recovery grade of cobalt. The direct correspondence between the recoveries of nickel and cobalt is shown in Figure 29.1. Typical industrial recoveries to the flotation concentrate of cobalt are 90 ± 5%.
Post copper recovery, the conditions of flotation are altered in subsequent stages to promote the cobalt/pyrite recovery. MAGNETIC SEPARATION. During the first bulk trials in June 2010 significant quantities of magnetite was noted to be present in the sample during processing, particularly in the supergene/native copper ore zones.
Flotation of Oxide Copper and Copper Cobalt Ores 19.1 INTRODUCTION Flotation practice of oxide copper minerals dates back to almost 60 years ago, and has been applied in Central Africa (Congo) by Union Miniere (Belgium). The process involves two basic flotation methods: (a) fatty acid flotation of oxide copper minerals from siliceous ore,
the viability of bulk sulphide flotation was demonstrated which in turn allowed concentration of the pay metals (cobalt, bismuth and gold). Further refinements to the flotation flowsheet allowed for establishment of the conditions for selective recovery of cobalt and bismuth into their respective sulphidic concentrates under robust, reproducible
Introduction to Mineral Processing. Froth Flotation Froth flotation is considered to be the most widely used method for ore beneficiation. In ore beneficiation, flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer ...
May 08, 2019· A medium grade Mayville sample, selected by Grid Metals, grading 0.48% Cu; 0.24% Ni, 0.02% cobalt was subjected to a laboratory scale flotation program of rougher and cleaner flotation. The best performing bulk concentrate achieved (Float 7), contained a copper/nickel grade of 23% with a cobalt grade of 0.40%.
Addition of hydrogen gas to saturation precipitates cobalt powder with a purity of approximately 99.6%. Recovery from copper-cobalt oxide concentrates. The ore is comminuted and the cobalt rich oxides are separated by froth flotation. The cobalt-bearing concentrate is then mixed with lime and coal, and then melted in a reducing atmosphere.
CONTINUOUS FLOTATION TESTING TO RECOVER COBALT FROM MISSOURI lEAD ORES By W. L. Cornell,1 A. M. Wethington,2 D. C. Holtgrefe,3 and F. H. Sharp1 ABSTRACT The Missouri lead ores are the only domestic sources of cobalt presently being mined and processed for other materials. They represent the best short-term solution for
Differential flotation sequence: A differential copper-cobalt flotation separation which begins with selective copper flotation by raising the slurry pH to 10 with lime and using a dithiophosphate copper collector. The tails produced in the first differential flotation step is followed by a pyrite and pyrrhotite flotation stage using xanthate ...
Sep 29, 2017· A review of why new technologies are going to drive the future of cobalt recovery and production. Background of Cobalt: Cobalt, the element that is just starting to create a lot of buzz; from the auto industry to electronics production, the popularity of cobalt is growing rapidly – chiefly for its use in rechargeable batteries.As global demand for cobalt increases, current sources of cobalt ...
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recovery of Ni, while collector dosage and percentage solids were insignificant. None of the tested parameters significantly affected copper recovery whilst pH was found to also significantly affect cobalt recovery. Keywords: flotation, process optimization, Taguchi orthogonal array, ANOVA. 1. Introduction
A study on the recovery of copper, cobalt, and zinc from copper smelter and converter slags by roasting with sulfuric acid has been conducted. Acid roasting of slags followed by hot water leaching was carried out to bring the metal values into solution.