A process for recovering nickel and cobalt values from nickel- and cobalt- containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite ore is leached as a slurry in a pressure acid leach containing an excess of aqueous sulphuric acid at high …
Laterite ore leaching to recover nickel and cobalt using high-temperature sulfuric acid has been described in this chapter. This process of leaching is termed as high-pressure acid-leaching process or HPAL process, which is highly selective to nickel and cobalt. A pressure leaching autoclave is used in this process that receives the hot feed ...
Nickel and cobalt are converted to soluble sulfate salts, and are recovered from the slurry in a counter-current decantation circuit (CCD). CCD involves washing the residue …
The extraction percentage of Co, Mg, and Ni by D2EHPA was very low in a pH range of 4.4 to 7.3, while the extraction percentage sharply increased by using saponified …
Cobalt-bearing slime, containing 8–10% Co, 28–34% Ni, 0.4–0.8% Cu, and 5–6% Zn, is treated by selective reduction with sulfur dioxide to solubilize the cobalt and nickel to thus separate them from the iron and some of the copper. The leach solution contains 14–16 g/L Co, 45–65 g/L Ni, 0.4–0.8 g/L Cu, and 3–5 g/L Zn.
Precipitation at pH 7, temperature 50°C for 30 minute, without seed addition resulted in nickel and cobalt recoveries of 82.8% and 92%, respectively with co-precipitated iron and manganese of 70% and 24.2%, respectively. The seed addition increases nickel and cobalt precipitations significantly to 99.9% and 99.1%, respectively.
We have been able to revolutionize the way Nickel and Cobalt are electrowon, and with the clever combination of emew electrowinning and process methodology we are able to recover metals from a variety of feeds including E-Waste, Nickel/Cobalt scrap, Nickel by-products, batteries, refinery bleed, SX/EW bleed and finishing bath.
Abstract Copper and cobalt can be found on nickel laterite ores, and cobalt can be found also on copper ores, and many contaminants such as iron, aluminum, and magnesium …
16 Nickel and cobalt can be recovered in essentially pure form from the respective pure nickel and ...
Before discharge to existing natural streams, the bleed stream and raffinate from cobalt extraction may require further treatment such as (1) solvent extraction with Cyanex 272 extractant at a higher pH, or (2) precipitation to remove and possibly recover the small amount of nickel. Nickel processing | Britannica.com More
US20010001650A1 Recovery of nickel and cobalt from . A process is provided for the selective recovery from an impure solution of pure nickel and cobalt solutions, suitable for electrolysis of the respective metals. The impure solution may be that obtained from acid leaching of nickel/cobalt bearing laterite or oxide ore.
the ore is stacked on impermeable plastic membranes and acid is percolated over the heap, generally for 3 to 4 months, at which stage 60% to 70% of the nickel-cobalt content is liberated into acid solution, which is then neutralised with limestone and a nickel-cobalt hydroxide intermediate product is generated, generally then sent to a smelter …
A Review of Nickel, Copper, and Cobalt Recovery by Chelating Ion Exchange Resins from Mining Processes and Mining Tailings November 2018 Mining Metallurgy & Exploration 36(1):199-213
The cobalt can then be extracted from the resulting pure solution using Cyanex 272.To recover the nickel and cobalt from the nickel and cobalt loaded resin, it is eluted …
Efficient cobalt extraction from nickel or copper ores can effectively alleviate cobalt supply. Taking the copper-cobalt mines in Congo as an example, share how to extract cobalt from copper mines. ... To reasonably develop and utilize copper-cobalt ore resources and improve the metal recovery rate, it is necessary to continuously improve the ...
EP1159461B1 Recovery of nickel and cobalt from ore. Recovery of nickel and cobalt from ore Download PDF Info Publication number European Patent Office Prior art keywords cobalt nickel ion exchange feed solution solution Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
In this process DIRB consortium reduces the goethite phase to hematite and magnetite with the exposure of nickel oxide. Subsequent leaching of DIRB pre-treated ore by H 2 SO 4 results in enhanced recovery of nickel and cobalt. However, bioleaching of nickel and cobalt from lateritic ore are in laboratory scale only.
Cobalt-bearing slime, containing 810 Co, 2834 Ni, 0.40.8 Cu, and 56 Zn, is treated by selective reduction with sulfur dioxide to solubilize the cobalt and nickel to ... Get Quote A Review Of Nickel Copper And Cobalt Recovery By. Nov 09, 2018 Copper and cobalt can be found on nickel laterite ores, and cobalt can be found also on copper ores, and ...
This residue contained 0.28 pct of the copper, and 79 pct of the cobalt and nickel from the original 25.2-kg batch of concentrate. Using a higher grade feed containing 1.2 pct Ni, …
At this level of reduction, 91% of the iron was retained in the slag phase, while only 50% of the cobalt, 63% of the copper, and 83% of the nickel were recovered to the alloy. It was found that injection of pulverized coal greatly …
The Bureau of Mines has developed a hydrometallurgical process to recover nickel and cobalt from lateritic ores. The nickel and cobalt are selectively reduced and then …
Cobalt recovery achieved was around 50%. Losses of soluble nickel in the fungal biomass were found to be 3.5–10.8%. Chemical analysis of the leach liquors showed the presence of significant amounts of citric, oxalic and other organic acids, indicating that leaching may be ascribed to the production of these metabolic products of fungal activity.
n For beneficiation of nickel ore and cobalt recovery, Tenova Mining & Minerals evaluates equipment to make unbiased selections of the best equipment for the job. n For stockpiling, materials handling, environmental protection and waste …
Nickel and cobalt can be recovered at the same time from nickel ores. For some of them, it is also possible to recover copper, depending on the resource. There are two main types of nickel resources in nature: laterites and sulfides. Laterite ores consist of 70% of all resources, while nickel production from this ore represents only 40% [ 23 ].
Nickel, cobalt and copper are recovered from oxide ores and oxide ore concentrates, especially those ores and concentrates containing substantial amounts of iron oxides, by selectively reducing the non-ferrous metal oxides to their elemental state in the absence of water vapor at temperatures ranging from 350 DEG C to 600 DEG C using carbon monoxide as the sole …
Laterite ore leaching to recover nickel and cobalt using high-temperature sulfuric acid has been described in this chapter. This process of leaching is termed as high-pressure acid-leaching process or HPAL process, which is highly selective to nickel and cobalt. ... NICKEL AND COBALT RECOVERY FROM A BULK COPPER-NICKEL CONCENTRATE USING THE …
Oxidative precipitation recovers nickel and cobalt from ore. An alternative method for processing mixed nickel-cobalt hydroxide precipitate to separate the nickel from cobalt and …
The precipitated nickel and cobalt sulphides can be leached in a water slurry in a pressure oxidation leach, the leach solution subjected to iron hydrolysis and precipitation, the iron …
Title : Recovery of nickel and cobalt from low-grade Ni-laterite ore of Sukinda, Odisha using microorganisms Abstract: Nickel principally occurs in two types of deposits i.e. sulfide and laterite ores. About 60% of nickel reserves are in the form of lateritic ores and 40% are in the form of sulfidic ores.
The Bureau of Mines has developed a hydrometallurgical process to recover nickel and cobalt from lateritic ores. The nickel and cobalt are selectively reduced and then extracted by an oxidizing ammonia-ammonium …