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2 edition of Enhanced copper leaching from sulfide ore by Acidithiobacillus ferrooxidans found in the catalog.

Enhanced copper leaching from sulfide ore by Acidithiobacillus ferrooxidans

Sarfraz Mohamed

Enhanced copper leaching from sulfide ore by Acidithiobacillus ferrooxidans

by Sarfraz Mohamed

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  • 19 Currently reading

Published by Laurentian University in Sudbury, Ont .
Written in English


Edition Notes

StatementSarfraz Mohamed.
The Physical Object
Paginationviii, 36 l. :
Number of Pages36
ID Numbers
Open LibraryOL22154847M

The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. For example: FeO(s) + SiO 2 (s)→ 2 (slag) This is very similar to the removal of impurities in the blast furnace. Effects of forced aeration on community dynamics of free and attached bacteria in copper sulphide ore bioleaching Sheng-hua Yin 1,2), Wei Chen 1,2),, and.

Preferentially, a consortium of Acidithiobacillus ferrooxidans, Acidithiobacillus caldus and Leptospirillum ferrooxidans are used for effective bioleaching. Acidithiobacillus ferrooxidans is capable of leaching nickel laterites and oxidic ores anaerobically in the presence of elemental sulphur or pyrite as energy source [21, 22]. Simultaneously enhanced Cu bioleaching from E-wastes and recovered Cu ions by direct current electric field in a bioelectrical reactor. HOME ; Simultaneously enhanced Cu bioleaching from E-wastes and recovered Cu ions by direct current electric field in a bioelectrical reactor.

A metal-containing refractory ore, such as refractory sulfide ore, is split into a first portion and a second portion. The first portion is partially biodigested by a sulfide-digesting microorganism in a biooxidation reactor where the microorganism is acclimated to the sulfide "diet" provided by the ore. The partially digested ore is then combined with the second portion. Bacterial leaching of a sulfide ore containing pyrite, chalcopyrite, and sphalerite was studied in shake flask experiments using Thiobacillus ferrooxidans and Thiobacillus thiooxidans strains isolated from mine sites. The Fe 2+ grown T. ferrooxidans isolates solubilized sphalerite preferentially over chalcopyrite leaching 7–10% Cu, 68–76% Zn, and 10–22% Fe from the ore in 18 days.


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Enhanced copper leaching from sulfide ore by Acidithiobacillus ferrooxidans by Sarfraz Mohamed Download PDF EPUB FB2

Bioheap leaching of oxide and copper sulfide minerals; High altitude (– m) of Tibet; Bioleaching SX-EW technology, realizing >80% copper extraction rate of sulfide ores: Cu %; secondary copper sulfide %, primary copper sulfides 35%: Asele Copper Mine: Habahe County, Xinjiang Autonomous RegionCited by: by Acidithiobacillus ferrooxidans, Irrespective of whether enhanced leaching can always.

celerating column leaching trial on copper sulfide ore, Rar e. Met., 27(), No. 1, p. The aim of this investigation was to compare a pure culture of Acidithiobacillus ferrooxidans GF with a mixed culture with Acidiphilium sp.

DX in the bioleaching of low-grade copper ore. The leaching experiments were carried out at ambient temperature. The influence of temperature, pH, redox potential and concentration of total iron and ferric ion in solution on the performance of Cited by:   In order to study the effect of seawater on low-grade copper sulfide ore bioleaching, five bioleaching experiments were designed firstly.

Bioleaching experiments were performed using mL flasks, and the proportion of seawater to leaching solution was varied in those experiments (%, %, %, % and %).Cited by: 1. Acidithiobacillus Ferrooxidans and Acidithiobacillus Thiooxidans and determined their role in leaching copper sulfide [13].

Sulfide ore bioleaching happens in an acidic environment that often contains a significant concentration of iron(III) ions. Secondary copper sulfides (chalcocite, covellite) are solved easily in.

The grown conditions of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans were investigated, and then experiments were conducted to research the bioleaching behaviors of crude ore of copper sulfide and hand-picked concentrates of chalcopyrite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans.

The experimental results show that the bacteria grow best when the. Bioleaching of low-grade copper sulfide ores by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans Article (PDF Available) in Journal of Central South University 21(2) To assess the effects of forced aeration Enhanced copper leaching from sulfide ore by Acidithiobacillus ferrooxidans book leaching dynamics of sulfides, five sets of column bioleaching of copper sulfides using Acidithiobacillus ferrooxidans were conducted when the aeration rates ranged from 0 to L/h.

The experimental results show that forced aeration can ameliorate the porosity and flow rates throughout the heap, and improve the bacterial concentration and oxidative. A study done on the copper solubilizing activity of At. ferrooxidans strains isolated from a low-grade copper mine in Chile revealed that when grown in a chalcopyrite-containing medium, a particular strain called D had a greatly enhanced solubilizing activity in relation to other strains (Fig.

The reason for this increased activity is connected to the D strain's resistance to sulfite. Acidithiobacillus ferrooxidans at 30ºC. Copper dissolution from ore was found to be directly related to the reaction pH ().

The leaching data obtained from the pulp densities (5, 10 and 20% wt/vol) at *e-mail: [email protected] DOI: /pjoes/ ONLINE PUBLICATION DATE: In order to extract copper from ore dumps, microbial leaching has been conducted in laboratory using the culture of Acidithiobacillus ferrooxidans.

Samples were taken from twelve different locations on Bor ore dumps. Leaching experiments were performed by the shake flask testing technique at C, during two-week period. Biohydrometallurgy based on microbiological corrosion is an increasingly popular ore extraction technology [].In particular, Acidithiobacillus ferrooxidans (A.

ferrooxidans) is by far the most widely used bioleaching microorganisms in ore leaching, including for Ni, Cu, Au, V, and Mn ores [7,8,9].Additionally, a corrosion cell is the most common method in manganese oxide minerals and sulfide.

Acid Consumption during Leaching Acidithiobacillus ferrooxidans produces acid from sulphide minerals but some acid must be present initially for driving the leaching in forward direction.

As the amount of sulphur in the copper ore is %, auto-generation of. The strains belong to the three major species often encountered in bioleaching of copper sulfide ores under mesophilic conditions: Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirillum ferriphilum.

Prior to their study in bioleaching, the different strains were characterized and compared at physiological level. higher the leaching rate of copper sulphides, the greater the density of bacteria absorbed on the surface of minerals. Key words: Bioleaching, copper sulphides, Acidithiobacillus ferrooxidans, cell density, copper extraction.

INTRODUCTION Bacterial heap leaching of low-grade copper sulphides is a developing technology. This conclusion is in agreement with the recent finding that the solubilization of Cu 2+ from a copper ore is determined by the sulfur-oxidizing activity of T.

ferrooxidans. The addition of iron ions to cultures of T. ferrooxidans growing with hydrolyzable, synthetic, iron-free sulfides generally enhanced leaching rates (25, 26). The toxicity of waste printed circuit boards (PCBs) to bacteria was considered as the major limitation in bioleaching of copper from PCBs.

To reduce the toxicity of PCBs, copper extraction from PCBs was investigated using bacteria-free cultural supernatant from some metallurgical microbial consortium, whose predominant organisms were Leptospirillum ferriphilum and Sulfobacillus. The native culture of mesophilic bacteria predominantly xidans iso isolated from the source mine water show good potential for the bio-leaching of copper from the low grade ore.

A bio-recovery of 75% copper in leach liquor is achieved with the ore adapted culture at pH with the particles of. Enhanced dissolution of minerals: Conjoint effects of particle size and microtopography, (). Raman characterization of secondary minerals formed during chalcopyrite leaching with Acidithiobacillus ferrooxidans, ().

Two-dimensional dynamic model of a copper sulfide ore. A low-grade ore containing ~% Cu, remains unutilized for want of a viable process at Malanjkhand Copper Project (MCP), India in which copper is present as chalcopyrite associated with pyrite in quartz veins and granitic rocks.

In order to extract copper from this material, bioleaching has been attempted on bench scale using Acidithiobacillus fer-rooxidans (A. ferrooxidans) isolated from the. The present invention is related to an isolated chemolithotrophic bacterium belonging to species Acidithiobacillus thiooxidans named Licanantay, deposited in Deutsche Sammlung von Mikroorganismen and Zellkulturen GmbH-DSMZ with number DSMand its use in pure form or in mixtures that contains it for bioleaching processes of minerals or sulfured metallic species concentrates.3 Pacific Ore Technology, PO BoxWest Perth, Western Australia *For correspondence email [email protected], Tel: +61 8Fax: +61 8 Abstract This study was prompted by the disparate recoveries of nickel (>70%) and copper (copper-nickel sulfide ore after about days of leaching.The enhancement mechanism of adapted adsorption behavior in the bioleaching of copper-bearing sulfide ore by Acidithiobacillus sp.

was systematically investigated from a mineralogical viewpoint and compared to adsorption-deficient (DF) and adsorption-unadapted (UA) systems.

With the assistance of the adapted adsorption behavior, both iron and sulfur metabolism was enhanced, which was proven .