cal process for nickel recovery from real sulphate heap leach liquors consists of the following six (6) unit operations: (1) Removal of iron, aluminium and chromium, as easily filterable crystalline basic sulphate salts of the jarosite–alunite type, at atmospheric pressure, by chemical precipitation at pH: 3.5 and 95 C.
Nickel is extracted with an oxime at a lower pH than other processes for extraction of nickel from solution, especially after separation of iron and cobalt values. The invention provides a process for the leaching of a laterite ore or concentrate for the recovery of …
The Recovery of nickel from lateritic ores as the main oxide resources has been always debated. Since it consists of 1.74% Ni, 0.14% Co and 40.8% Fe, co-dissolution of iron occurred by using common lixiviation like sulfuric acid. Therefore, some leaching agents should be sought due to promoting a high dissolution of nickel/cobalt and a negligible iron recovery.
nickel processing - nickel processing - Extraction and refining: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel ...
Nickel laterite ores are becoming an increasingly important source of nickel and cobalt. BASF solvent extraction reagents are used in a nickel production plant, Queensland Nickel Inc. (QNI), to extract nickel from ammonia solutions. LIX® 87QN reagent was developed to fit into a QNI-developed nickel recovery process based on a modified Caron ...
Cobalt-nickel extraction Taguchi applications. Low-grade laterite which contains nickel lower than 0.5% is difficult to be processed using pyrometallurgy. One method which is able to solve this problem is solvent extraction. In this study, a solvent extraction process using batch recycle methods has been
Ammonia leaching can achieve selective recovery of nickel and molybdenum without aluminum extraction from spent hydrodesulfurization catalyst. In this study, a method for selective nickel extraction by LIX84 from ammoniacal leach liquor is proposed. After a two-stage countercurrent extraction, 99.977% Ni was extracted, while 0.096% Mo, 0.431% Al and 2.812% P were co-extracted …
meant >98.6 % cobalt extraction was required, depending on the extent of nickel extraction. Basic operating parameters were used; pH 5.1 – 5.5, temperature of 60°C, retention time of 5 minutes and organic continuous continuity at various organic to aqueous (O:A) ratios. Caustic was used for maintain the pH in the mixer.
The recovery of nickel from aqueous ammoniacal solutions containing nickel values by extraction of the nickel values therefrom with an organic solution containing an oxime extractant and an equilibrium modifier followed by stripping of the nickel values from the organic solution by a concentrated aqueous ammoniacal solution from which the nickel can then be recovered.
acid leaching (5-6 h). The %recovery and purity is significantly high for ultrasonication route compared to conventional acid leaching and chelation technique. The recovered nickel salts can be recycled for the preparation of fresh catalysts and promises to be a good industrial process for handling 1-2 t per batch of spent nickel catalyst.
recovery of nickel and cobalt from nitric acid nickel laterite leach solutions by solvent extraction." Minerals Engineering, 77, 42-51. Hutton-Ashkenny, M., Ibana, D., and Barnard, K. R. 2015. "Direct solvent extraction for the recovery of nickel and cobalt from nitric acid nickel laterite leach liquors."
In a 4 N ammonia–water solution, nickel recovery was 60%, and vanadium extraction was much lower than that of sulfuric acid or sodium hydroxide leaching. Fly ash electrostatically precipitated in power plants was leached with 0.25 N ammonia–water solution and 2 N ammonium sulfate solution, a selective recovery for nickel 60% and 8% vanadium ...
Solvent Extraction. CYANEX® 272 extractant has proven to be the reagent of choice for the separation of cobalt from nickel from both sulfate and chloride media. It is used to produce a major portion of the world's cobalt. Since the active component of CYANEX 272 extractant is a phosphinic acid, metals are extracted through a cation exchange ...
Nickel extraction was conducted using a two-stage countercurrent method from the ammoniacal leach liquor. The loaded organic phase containing 2.639 g/L nickel with 99.977% extraction efficiency can be obtained under LIX84 concentration of 5%, initial pH value of 11.5, and phase ratio (O/A) of 2/1.1. Ni-Mo separation can be efficiently achieved. c)
The usual method of nickel extraction from sulRde ores is through the production of nickel matte after enriching the nickel content of the ore. This is com- ... all recovery of pentlandite and pyrrhotite could be restricted to 4.1% and 2.5% respectively by introduc-ing DETA in combination with SO 2 (Figure 4).
Recovery of nickel by solvent extraction from electroplating rinse bath solution. Solvent Extr. Ion Exch., Vol. 28(2), pp. 225-243, 2010. P.S. Rao, S. Kalyani, K.V.N. Reddy and A. Krishnaiah. Comparison of biosorption of nickel (II) and copper (II) Ions from aqueous solution by sphaeroplea algae and acid treated sphaeroplea algae. Sep.
"Solvent extraction process for the recovery of nickel and cobalt from Caldag laterite leach solution: The first bench-scale study", Hydrometallurgy 169 (2017) 135–141. Sudibyo, Hermida, L. and Suwardi. "Application of Taguchi optimization on the cassava starch wastewater electrocoagulation using batch recycle method", AIP Conference ...
Solvent extraction and ion exchange are also used in the recovery of nickel from various bleed streams from the electrorefining of other metals such as copper. The unique properties of nickel such as corrosion resistance, conductive and magnetic properties, and the capability for electromagnetic shielding, are what make nickel such a valuable ...
Recovery of nickel from sulphate media by batch pertraction in a rotating film contactor using Cyanex 302 as a carrier By A. Sabouni Review on solvent extraction of cadmium from various solutions
Figure 4 illustrates the influence of the pulp density on nickel extraction at 90 °C in 0.8M EDTA concentration after 6 hour leach - ing. The effect of solid/liquid ratio on the recovery rate is shown in Figure 4. For the ranges tested nickel recovery increases with increase in the amount of liquid in the same amount of the catalyst
A process for nickel recovery from a spent catalyst of definite composition has been developed using the hydro-metallurgical route. The processing steps includes direct sulphuric acid leaching followed by separation of iron as well as silica and other impurities. For a 152 microm particle size catal …
PDF | On Jan 1, 2005, C.Y. Cheng and others published The recovery of nickel and cobalt from leach solutions by solvent extraction: Process overview, recent research and development | Find, read ...
Development of a Solvent Extraction Process for the Recovery of Nickel and Cobalt from Nitrate Solutions . Zela Tanlega Ichlas . This thesis is presented for the Degree of Master of Philosophy (Mining and Metallurgical Engineering) of Curtin University . November 2015
It is essential for social development and is an indispensable non-ferrous metal. At present, the main methods of nickel extraction are pyrometallurgy and hydrometallurgy, with pyrometallurgy being the traditional method of nickel extraction [2,3,4]. …
Abstract. The recovery of substantially pure magnesium and/or nickel sulphite which is present in a solid starting meterial. The latter is treated with gaseous SO/sub 2/ in water, the solution obtained is treated by a liquid-liquid extraction, to give an aqueous phase and an organic phase and the magnesium and/or nickel sulphite is recovered from the aqueous phase.
Nickel recovery from various types of wastes was described with emphasis on the hydrometallurgical approach. The high market price of nickel makes nickel recycling economically profitable. On the other hand, the environmental concerns and health risks related to nickel exposure impose the removal and recovery of nickel from wastes.
Hydrometallurgy 61:223-227. Kyung-Ho P, Debasish M (2006). Process for Cobalt separation and recovery in the presence of nickel from sulphate solutions by Cyanex 272. Met. Mater. Int. 12:441-446. Lenhard Z (2008). Extraction and separation of Cobalt and Nickel with extractants Cyanex 302, Cyanex 272 and their mixture. Kem. Ind. 57:417-423.
Removal and recovery of nickel(II) from aqueous solution by loofa sponge-immobilized biomass of Chlorella sorokiniana: characterization studies J Hazard Mater. 2004 Apr 30;108(1-2):85-94. doi: 10.1016/j.jhazmat.2004.01.002. Authors N Akhtar 1, J Iqbal, M Iqbal. Affiliation 1 Department of ...
These nickel and ammonium bisulfate crystals are treated with a concentrated solution of NaOH to form Ni(OH) 2. Nickel hydroxide is dissolved by sulfuric acid to form nickel sulfate, which is reduced by electrolysis: Ni 2+ to Ni 0. The ammonium sulfate solutions allow the recovery of ammonia by stripping.
Separation and recovery of iron and nickel from low‒grade laterite nickel ore using reduction roasting at rotary kiln followed by magnetic separation …
