scholarly journals Research on treating processes of Nickel Laterite Ores in the world and Vietnam

2021 ◽  
Vol 62 (3b) ◽  
pp. 41-50
Author(s):  
Khanh Tuan Nguyen ◽  
Toi Trung Tran ◽  
Thuat Tien Phung ◽  
Keyword(s):  
Froth Flotation ◽  
Nickel Content ◽  
Magnetic Method ◽  
Nickel Laterite ◽  
Separation Processes ◽  
Processing Technologies ◽  
Laterite Ores ◽  
Ore Processing ◽  
The World ◽  
Nickel Ores

Laterite nickel ores, accounting for about 70% of total world nickel reserves, are very abundant and considered as an important resource of nickel. However, nickel content of laterite ores are generally low of about 0.5÷2.5% Ni. In addition, nickel minerals are very finely disseminated in the ores, so that traditional separation methods such as froth flotation, gravity method, magnetic method, and electrical separation produce very low recovery efficiency. Currently, the treatment of this type of ores is being intensively studied and directed to use common available processes including: Hydrometallurgical, pyrometallurgical, and reduction roasting - magnetic separation processes. This article aims to summarize typical studies on the characteristics of current laterite nickel ore processing technologies commonly used in the world and in Vietnam. From the review, appropriate direction for treatment of Thanh Hoa - Vietnam laterite nickel ores can be proposed.

scholarly journals Nickel laterite concentration through a non-conventional method with surface sulfidization

DYNA ◽  
2020 ◽  
Vol 87 (215) ◽  
pp. 18-27
Author(s):  
Moises Oswaldo Bustamante Rúa ◽  
Sindy Dayanis Gonzalez Arias ◽  
Pablo Bustamante Baena
Keyword(s):  
Iron Oxides ◽  
Conventional Method ◽  
New Technology ◽  
Froth Flotation ◽  
Nickel Content ◽  
Reverse Flotation ◽  
Nickel Laterite ◽  
Physical Chemical ◽  
Nickel Ores ◽  
Chemical Conditions

Nickel ores are found mainly as sulfides and laterites in oxidized ores, such as iron oxides, which are usually “Ni-bearing”. This investigation determined the physical-chemical conditions necessary to increase the tenor and recovery in lateritic deposits, with the implementation of a new technology that allows the increase of the tenor (a process called “up-grading”). The froth flotation is proposed as a concentrating process to increase the Nickel content in the lateritic deposits. By means of sulfidization and direct flotation, specific hydrophobicity of the mineral is achieved, substantially improving the nickel concentrations in the process, with recoveries close to 86%, which, compared with conventional direct and inverse floats without effecting this activation with Na2S, results in recoveries of 70% and 16%, respectively. The reverse flotation also increases the Nickel content with an approximate recovery of 70%; however, the froth flotation, with activation Na2S is still better.

Microorganisms in Bioflotation and Bioflocculation: Potential Application and Research Needs

2009 ◽  
Vol 71-73 ◽  
pp. 319-328 ◽  
Author(s):  
K. Hanumantha Rao ◽  
Annamaria Vilinska ◽  
I.V. Chernyshova
Keyword(s):  
Energy Charge ◽  
Surface Reactivity ◽  
Basic Knowledge ◽  
Primary Data ◽  
Great Promise ◽  
Mineral Surface ◽  
Processing Technologies ◽  
Ore Processing ◽  
Charge Potential ◽  
Mineral Beneficiation

Conventionally, physico-chemical methods are used in mineral processing for recovering value minerals from ores. The ageing of ore processing tailings and waste rocks, and mining tailings contamination by chemical reagents constitute a major threat to the environment. It is imperative to develop novel economically more efficient and environmentally benign methods of flotation and waste processing, exploiting the intriguing and exciting ability of bacteria to selectively modify the surface properties of solids. Microorganisms have not only facilitate hydrometallurgical leaching operations but have also show a great promise in mineral beneficiation processes such as flotation and flocculation. Several laboratory investigations revealed that microorganisms could function similar to traditional reagents. Microorganisms have a tremendous influence on their environment through the transfer of energy, charge, and materials across a complex biotic mineral-solution interface. The bio-modification of mineral surfaces involves the complex action of microorganism on the mineral surface. The manner, in which bacteria affect the surface reactivity and the mechanism of bacteria adsorption, is still unknown and accumulation of the primary data in this area is only starting. The bio-flotation and bio-flocculation processes concern the mineral response to the bacterium presence, which is essentially interplay between microorganism and the physicochemical properties of the mineral surface, such as the atomic and electronic structure, the net charge/potential, acid-base properties, and wettability of the surface. There is an urgent need for developing basic knowledge that would underpin biotechnological innovations in the natural resource (re)processing technologies that deliver competitive solutions.

Preconcentration strategies in the processing of nickel laterite ores part 3: Flotation testing

2015 ◽  
Vol 79 ◽  
pp. 279-286 ◽  
Author(s):  
Keith Quast ◽  
Akira Otsuki ◽  
Daniel Fornasiero ◽  
David J. Robinson ◽  
Jonas Addai-Mensah
Keyword(s):  
Nickel Laterite ◽  
Laterite Ores

scholarly journals Selective Separation of Hematite by a Synthesized Depressant in Various Scales of Anionic Reverse Flotation

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 124 ◽  
Author(s):  
Arash Tohry ◽  
Reza Dehghan ◽  
Saeed Chehreh Chelgani ◽  
Jan Rosenkranz ◽  
Omid Rahmani
Keyword(s):  
Iron Oxide ◽  
Iron Ore ◽  
Selective Separation ◽  
Reverse Flotation ◽  
High Quality ◽  
Main Hypothesis ◽  
Iron Concentrate ◽  
Ore Processing ◽  
The World ◽  
Apatite Group

Demand for high-quality iron concentrate is significantly increasing around the world. Thus, the development of the techniques for a selective separation and rejection of typical associated minerals in the iron oxide ores, such as phosphorous minerals (mainly apatite group), is a high priority. Reverse anionic flotation by using sodium silicate (SS) as an iron oxide depressant is one of the techniques for iron ore processing. This investigation is going to present a synthesized reagent “sodium co-silicate (SCS)” for hematite depression through a reverse anionic flotation. The main hypothesis is the selective depression of hematite and, simultaneously, modification of the pulp pH by SCS. Various flotation experiments, including micro-flotation, and batch flotation of laboratory and industrial scales, were conducted in order to compare the depression selectivity of SS versus SCS. Outcomes of flotation tests at the different flotation scales demonstrated that hematite depression by SCS is around 3.3% higher than by SS. Based on flotation experiment outcomes, it was concluded that SCS can modify the pH of the process at ~9.5, and the plant reagents (including NaOH, Na2CO3, and SS gel) can be replaced by just SCS, which can also lead to a higher efficiency in the plant.

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