ammonium chloride leach for nickel

21-08-2011· A method for processing nickel ores with ammonium chloride is considered. The results of thermodynamic calculations for the reactions of the oxide components of nickel ore with ammonium chloride are given. Thermogravimetric and kinetic investigations were performed. The technological sequence of the separation of oxidized nickel ores into individual oxides was developed.

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30-07-2020· This study focused on the extraction of valuable metals from the cathode-active materials in spent lithium-ion batteries using a high-concentration chloride solution. The effects of the concentrations of ammonium chloride (NH4Cl), hydrochloric acid (HCl), and reductants such as hydrogen peroxide (H2O2) and urea (CO(NH2)2) on metal extraction and chlorine production were studied experimentally ...

In the Caron process, ferronickel produced by reductive roasting of laterite ores is leached in ammonia/ammonium carbonate solution. Thiosulfate ions in the leach liquor, originated from sulfur containing fuels, interfere with the leaching process. A comparative fundamental study of the reaction equilibria, Eh-pH diagrams, and leaching kinetics of Ni, Ni3S 2, NiS, and NiO has been conducted in ...

In this work, ammonium chloride solution was used as the chlorination agent and the process was achieved under 2 M of hydrochloric acid, 3 M of ammonium chloride and a liquid/solid ratio of 6:1 (mL/g) at 90 °C for 90 min. Notably, the process resulted in a good yield, with nickel (87.7%), cobalt (75.1%), manganese (95.6%), and iron (only 21.1%).

Nickel(II) chloride (or just nickel chloride), is the chemical compound NiCl 2.The anhydrous salt is yellow, but the more familiar hydrate NiCl 2 ·6H 2 O is green. Nickel(II) chloride, in various forms, is the most important source of nickel for chemical synthesis. The nickel chlorides are deliquescent, absorbing moisture from the air to form a solution.

04-09-2013· Ammonia Regeneration in Nickel Matte Chloride Leaching Master's Thesis 2013 99 pages, 36 figures, 23 tables and 5 appendices Examiners: Professor Ilkka Turunen M. Sc. (Tech) Kaarlo Haavanlammi Keywords: ammonia, regeneration, recovery, stripping, column. Ammonia can be used as a pH controller in chloride-based metal recovery processes.

high and ammonium carbonate concentration is zero nickel extraction is low. An increase in ammonium carbonate concentration also increases the degree of nickel extraction. Ammonium carbonate is critical for the extraction, since ammonium ions in the solution prevent hydrolysis of the nickel ammine complex.

04-09-2013· Ammonia Regeneration in Nickel Matte Chloride Leaching Master's Thesis 2013 99 pages, 36 figures, 23 tables and 5 appendices Examiners: Professor Ilkka Turunen M. Sc. (Tech) Kaarlo Haavanlammi Keywords: ammonia, regeneration, recovery, stripping, column. Ammonia can be used as a pH controller in chloride-based metal recovery processes.

The black nickel formation process in leaching solution containing ammonia and chloride was investigated in terms of cyclic voltammetric and galvanostatic reduction techniques.The structure of black nickel was examined by means of X-ray diffraction technique.The results show that in the scanning region,two oxidization current peaks are observed during the positive sweep,one of which is ...

01-08-1986· Ammonium chloride was the most effective for high percentage extraction of copper and nickel, but cobalt extraction was higher when ammonium carbonate was used as the buffer. This may be due to the fact that, when using ammonium carbonate, manganese is precipitated as in- soluble manganese carbonate [16], and not as hydroxide, so the loss of cobalt by co-precipitation may be less.

The process is disclosed for recovering elemental nickel from an impure aqueous ammoniacal ammonium carbonate liquor containing, in addition to nickel, one or more impurities such as sulphur, chlorine, cobalt, magnesium, manganese, iron, zinc and copper. According to the process, the composition of the liquor is first adjusted to contain at least 1.5 moles sulphur in the form of dissolved ...

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(57) Abstract: Usage: metallurgy of non-ferrous metals, in particular hydrometallurgy of Nickel and cobalt. The inventive multi-stage ammonium carbonate leaching-rich Nickel-cobalt materials is carried out in the presence of air at the flow rate of 20-50 m 3 per tonne of feedstock when the redox potential of 310 - 450 mV.. The invention relates to metallurgy and can be used in hydrometallurgy ...

01-05-2015· The ammonium jarosite precipitate used in the present study was generated from Impala Base Metal Refinery (BMR). The elemental analysis of the ammonium jarosite was performed using "RigakuZSX Primus II" X-ray fluorescence (XRF) and the results are presented in Table 1.It can be seen that the jarosite precipitate contains a 3.5% mass of nickel at a concurrence of 41.3% of iron.

Nickel Chloride is a green or yellow colored, crystalline inorganic compound that produces toxic gases upon heating. Nickel chloride is used in electroplating, in nickel catalysts and to absorb ammonia in industrial gas masks. Exposure to this substance can cause severe dermatitis, skin and asthma-like allergies and affects the lungs, kidneys, gastrointestinal tract and neurological system.

Selective leaching of valuable metals from laterite nickel ore with ammonium chloride-hydrochloric acid solution April 2018 Journal of Cleaner Production 179:24-30

19-10-2020· Abstract In this study, we propose a novel temperature-programmed ammonium chloride (NH4Cl) roasting–water-leaching process to extract nickel (Ni), cobalt (Co), and copper (Cu) from polymetallic sulfide minerals in a synchronous, efficient, and environment-friendly manner. During the roasting process, several vital parameters were investigated to achieve the high co-sulfation of Ni, Co, and ...

(54) Title: CHLORIDE ASSISTED HYDROMETALLURGICAL EXTRACTION OF NICKEL AND COBALT FROM SULPHIDE OR LATERITE ORES (57) Abstract A process for the extraction of metal from an ore or concentrate which contains nickel and/or cobalt values and other metals, comprises subjecting the ore or concentrate to acid leaching under pressure at pH 5 2 to obtain a liquor containing nickel and/or cobalt values ...

The present invention relates to a new hydrometallurgical method for recovering nickel from nickel sulphide bearing raw materials, such as sulphide concentrate or ore. In general, the process involves the oxidative atmospheric pressure leaching of nickel sulphide concentrate or ore using a sodium chloride/hydrochloric acid based leach media.

Notably, the process resulted in a good yield, with nickel (87.7%), cobalt (75.1%), manganese (95.6%), and iron (only 21.1%). The leaching mechanism was demonstrated by the analysis of XRD pattern of leaching residue and raw ore, suggesting that chloride ions are beneficial to the dissolution of goethite mineral in nickel laterite.

The concept of atmospheric, acidic high-concentration magnesium chloride brine leaching for the recovery of nickel, cobalt (and manganese) from nickel laterite ores was recently suggested by ...

by Sherritt Gordon. In this process, ammonia leaching of. sulfide minerals of copper, nickel, cobalt and iron was. conducted at a temperature of about 105 ° C and air pres-. sure of 0.8 MPa ...

The leach is conducted at about pH 7.0 - 7.5 in 200 g/L ammonium sulphate solution; minimal free ammonia (~ 1 g/L) is present under these conditions. The complexes are formed according to the following reaction: (NH 4)2SO4 + Ni(OH)2↓ → Ni(NH3)2SO4 + 2H2O (NH4)2SO4 + Co(OH)2↓ → Co(NH3)2SO4 + 2H2O

19-02-2020· Leaching of copper from tailings using ammonia/ammonium chloride solution ... alkali is added to a solution of a nickel (II) salt. It is insoluble in water but dissolves readily in acids and ammonium hydroxide. Nickel oxide is a ... The copper leach solution was contacted with the stationary phase at a rate of 0.125 bed ...

01-04-2018· In this work, ammonium chloride solution was used as the chlorination agent and the process was achieved under 2 M of hydrochloric acid, 3 M of ammonium chloride and a liquid/solid ratio of 6:1 (mL/g) at 90 °C for 90 min. Notably, the process resulted in a good yield, with nickel (87.7%), cobalt (75.1%), manganese (95.6%), and iron (only 21.1%).

Nickel ammonium chloride, hexahydrate | Cl3H16NNiO6 | CID 56843640 - structure, chemical names, physical and chemical properties, classification, patents, literature ...