leaching of low grade nickel ores by fungi metabolic acids

Biological and Bioelectrochemical Recovery of Critical and

for solubilization from low-grade ores and solid wastes as well as via metal immobili-zation from leachate solutions, process streams, and wastewaters (Figure 1). Glossary Acidophiles: microorganisms which have a pH optimum for growth at or below pH 3.0. Several particularly fungi, can tolerate an acidic pH below 3, but many have an optimum pH for Get price

Acid

Heap leaching accounts for a fifth of global copper production, sourced primarily from porphyry ores, yet metal recoveries are often not optimal. Gangue, and its interaction with acid, plays an important role in such processes. Thus, a proper understanding of gangue minerals present in the ore, their textural relationships relative to particle size distribution, reactivity with acid under Get price

Bioleaching

Jun 06, 2019Leaching Process Bioleaching is used on an industrial scale for extraction of low grade ores having less than 0.5%w/w metal concentration. 5 methods of leaching process. 1. Dump leaching 2. Heap leaching 3.Insitu leaching 4. Under ground leaching 5.Tank leaching 10. Get price

Bioleaching

Dec 27, 2018It lives primarily in water and soil. Take part in bioleaching of copper oxide ore, uranium( extract100gm uranium per liter solution in 1o seconds). 15 Rhizopus arrhizus: This Microorganism can extract uranium from low grade uranium ores. 16. Aspergillus niger: It is fungi which extracts copper and nickel. Get price

BIO

Bio-leaching has of late emerged as an important processing tools and sometimes only option to recover metals from the lean grade ores and discarded materials, off-grade concentrates and complex/refractory resources, because of advantages such as low cost of production, low energy consumption and eco-friendly nature. With the advent of Get price

A Brief Note on the Heap Leaching Technologies for the

Heap leaching is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after metals like copper, from their primary resources (ores and minerals). For many decades, there has been a growing demand for heap leaching due to its environmental benefits. Heap leaching provides mining operators with a benign Get price

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to the amount of liquid reactant, in this case metabolic citric acid is insufficient to leach metals in nickel laterite ore [11]. The recovered amount of pulp density that was 5% for Ni (1.63%), Al (0.47%), Fe (0.23%) and Mg (1.09%) still falls short than synthetic citric acid that could leach about 90% of Ni [6]. Get price

Process Of Bioleaching To Extract Copper From Ores

Bioleaching copper bitesize. extraction of copper from ores phytoming and bioleaching phytomining how it works this is one way of extracting copper from low grade ores which are less than 1 copper. biomining wikipedia biomining is a technique of extracting metals from ores and other solid materials typically using prokaryotes or fungi. Get price

Removal Of Iron Impurities Of Clay Materials Using

organic acids of particular effectiveness are citric and oxalic acids, produced by many fungi in their metabolism of carbohydrate substrates. For low-grade hematitic laterites, [5] were found that citric acid was the most effective organic acid for nickel extraction while oxalic acid displayed remarkable selectivity on iron extraction. Get price

Extraction of Copper from Malanjkhand Low

The low-grade copper ore procured from Malanjkhand, Madhya Pradesh, India was used as leaching material. The ore was crushed, grinded and sieved to obtain a mean particle size of 75. Also representative samples were subjected to acid digestion and analyzed by Atomic Absorption Spectrophotometer (AAS). Get price

Badania wstępne nad mikrobiologicznym odzyskiem niklu z

Different possibilities of leaching nickel ores in the presence of biomass in the system using metabolic solution (organic acids solution), formed by used Aspergillus niger were considered and tested. The research on different grain fractions of ore, using flasks, the mixing reactor and the glass column have been carried out. Get price

Leaching Of Alumina From Bauxite Diagram

Use of some isolated fungi in biological Leaching of Aluminum from low grade bauxite Y. Ghorbani1*, M. Oliazadeh2, A. shahvedi3, R. Roohi3, A. Pirayehgar2. Bayer process The Bayer process is the principal industrial, means of refining bauxite to produce alumina (aluminium oxide). Get price

OPTIMIZATION OF NICKEL EXTRACTION FROM LATERITIC ORE IN

Agacayak, T., Zedef, V., Aydogan, S., 2011, "Leaching of Lateritic Nickel Ores of Karacam (Eskisehir-Turkey) with Hydrochloric Acid", 11th International Multidisciplinary Scientific Geo-ConferenceEXPO SGEM, Modern Management of Mine Producing, Geology and Get price

Minerals Engineering International Online

J.A. Tang and M. Valix, Leaching of low grade limonite and nontronite ores by fungi metabolic acids, Minerals Engineering, Vol.19 2, 2006. A. Deepatana, J.A. Tang and M. Valix, Comparative study of chelating ion exchange resins for metal recovery from bioleaching of nickel laterite ores, Minerals Engineering, Vol.19 2, 2006 Get price

CN101768665A

The invention discloses a method for reducing acid consumption during heap leaching and high-pressure leaching of nickel laterite ore, which combines the heap leaching technology with the high-pressure leaching technology to reduce acid consumption during the treatment of nickel laterite ore; residual sulfuric acid in coarse particle immersion of limonite heap is sufficiently utilized and Get price

Bioleaching and bioprecipitation of nickel and iron from

Samples of laterite ores from Greece were characterised mineralogically and a number of microorganisms isolated from them. One of these organisms (code FI) was successfully acclimatized to 6400 ppm nickel. Samples of the high-grade Greek Kastoria nickel laterite were leached with sulphuric acid and a number of organic acids. Get price

Możliwości odzysku metali z rud niesiarczkowych z

Duyvesteyn W. Liu H., Davis M.: Heap leaching of nickel containing ore with sulfuric acid. 2003 US patent: US6312500. 10. Duyvesteyn W. Liu H.: Process for organic acid bioleaching of nickel ore, WO0166808, 2004. Leaching of low grade limonite and nontronite ores by fungi metabolic acids. Minerals Engineering 2006, nr 19, s. 1274-1279. 33. Get price

Indirect bioleaching of low

The objective of the present study was to investigate the indirect bioleaching of low-grade nickel limonite and saprolite ores using fungal metabolic organic acids generated by Aspergillus niger. The indirect bioleaching experiments were carried out in a 2000 ml five-neck glass vessel containing 500 ml of the culture filtrate comprising fungal metabolic organic acids (which were obtained from organic Get price

Bioleaching of zinc and nickel from silicates using

2.5. Chemical leaching with organic and inorganic acids To determine the effect of organic acids inter- mediate or final products of the microbial metabolism as well as of inorganic acids on the. extraction of nickel and zinc from silicates, experi-ments were carried out using citric acid, oxalic acid, H SO, at a pulp density of 5 g24 r100 ml Get price

Anat Deepatana (อาณัติ ดีพัฒนา)

Ion-exchange recovery of nickel and cobalt from metal-organic complexes generated in bioleaching of low grade nickel laterite ores. Author(s):Deepatana, A. | Valix, M. Kinetics of limonite and nontronite ore leaching by fungi metabolic acids. Author(s):Deepatana, A. | Tang, J. | Valix, M. Recovery of nickel and cobalt from organic acid Get price

Microbial assisted leaching of nickel laterites

Microbial leaching of non-sulphide ores, especially oxides and silicates, represents a new challenge.For these ores, including laterites, chemoorganotrophic leaching using fungi is necessary. This is because the organic acids metabolically produced by fungi have a dual effect of providing hydrogen ions for acidolysis of minerals and complexing metals due to their chelating capacity (Tzeferis Get price

Leaching Kinetics of Calcined Magnesite in Citric Acid

Jan 11, 2006The kinetics of leaching of calcined magnesite by citric acid solution was studied. The effects of reaction temperature, particle size, and acid concentration were investigated. The leaching data showed that the reaction is under chemical kinetics control with an activation energy of 39.1 kJ mol-1. Additionally, the fact that leaching was controlled by the chemical reaction was also supported Get price

Mobilisation of potassium and phosphorus from iron ore by

organic acids produced effective leaching of cobalt and nickel. In another study, Castro et al. (2000) conﬁrmed the better potential of A. niger compared to bacteria (Bacillus and Pseudomonas) in the leaching of zinc and nickel. Aspergillus niger HNA-1 isolated from the surface of iron ore samples was also used by Delvasto et al. (2005) for the Get price

Influence of chemical and biogenic leaching on surface

from the low grade laterite ores. However, practical application of this method to the industry involves many difficulties to overcome. Table 1. Chemical leaching of nickel oxide ore using different organic acids. Organic acid Mineral material Metal Yield of extraction, % References Citric acid Lactic acid/Malic acid Limonite, nontronite, Get price

Biomineral Processing: A Valid Eco

Bench scale studies were conducted to optimize the lixiviant flow rates and acid consumption for extraction of copper from low grade ore using BACFOX bioreactor technology [4, 5, 67, 77]. Based on the optimized conditions at bench scale, pilot scale practices were undergone to test the feasibility of the BACFOX process at an industrial setting Get price

Leaching of low grade limonite and nontronite ores by

Sep 01, 2006Bioleaching involves the utilization of heterotrophic fungi and their metabolic products to dissolve nickel and cobalt from low grade nickel laterite ores. Current studies have shown that laterite ores are amenable to leaching with the organic acid excreted by heterotrophic organisms (Bosecker, 1997, Valix et al., 2004). However, commercial application of the process has been less successful. Get price

Dissolution of heavy metals from electrostatic

The application of fungus for the biobenefication of low grade iron ore bearing a high content of alumina and silica has also been reported (Mishra et al., 2010). Fungi produce various organic acids as a result of carbohydrate metabolism like oxalic, citric, lactic and gluconic acid etc., (Ducam et al., 1967; Turma and Sing, 1993; Bosshard et Get price