iron ore bioflotation

Recovery of Copper from Pyritic Copper Ores Using a ...

In an attempt to investigate the use of bacteria and their metabolites as bioflotation reagents for environmentally friendly mineral processing, laboratory cell flotation tests were carried out using copper sulfide ores bearing a high content of pyrite, which were mixed with a biosurfactant-producing mixotrophic bacterium as bioflotation reagents.

A novel property of DNA

A novel property of DNA - as a bioflotation reagent in mineral processing. Vasanthakumar B(1), Ravishankar H, Subramanian S. Author information: (1)Department of Materials Engineering, Indian Institute of Science, Bangalore, India. Environmental concerns regarding the use of certain chemicals in the froth flotation of minerals have led ...

SciELO

2021-8-9 · Fundamental bioflotation aspects of hematite using an extracted Rhodococcus opacus by-product Mining ... investigate the influence of polyacrylamides as co-depressant in a blend with starch depressant on the reverse cationic iron ore flotation. The results indicated that the use of polyacrylamides as dual function polymer should be an ...

Application of biotechnology in iron ore beneficiation ...

2015-1-1 · For iron ore biobeneficiation, the types and combinations of bacteria used and the metabolite(s) released can be modified by altering the media of growth (varying ionic strength, nutrients, carbon sources, and growth substrates), by stressful conditions, by the temperature and pH, and by the adaptation to a mineral for its selective separation ...

Bioflotation and bioflocculation review: microorganisms ...

2018-6-8 · Keywords: Bioflotation, Bioflocculation, Iron ore. Additional information. The authors wish to thank Professor Natarajan and CSIRO colleagues for useful discussions in the preparation of this manuscript. Article Metrics Views 1015. Citations Crossref 13 Web of Science 0 Scopus 19. Altmetric

Bioflotation of Sarcheshmeh Copper Sulfide Ore

Application of Acidithiobacillus ferrooxidans bacteria to flotation of Sarcheshmeh low-grade copper sulfide ore was studied. Sarcheshmeh low-grade ore contains pyrite, which causes some problems in the flotation of copper minerals. In this study, A ferrooxidans was used to change the surface chemistry of pyrite and copper sulfide ores and consequently, their flotation behaviour.

Direct hematite flotation from an iron ore tailing using ...

2021-1-17 · Iron ore tailings bioflotation biosurfactant Rhodococcus opacus. Acknowledgements. The authors acknowledge Vale Institute of Technology – ITV, CNPq (National Council for Scientific and Technological Development); CAPES (Coordination for the Improvement of Higher-Level Personnel), FAPERJ (Rio de Janeiro State Research Foundation), Pontifical ...

Role of bacterial interaction and bioreagents in iron ore ...

Iron ore sinter, constituting a major proportion of blast furnace burden in most countries, particularly in the Asia-Pacific region, is therefore expected to have a significant impact on blast ...

Feasible bioprocessing technologies for low-grade iron ...

Bio-pretreatment of the above iron ore mineral mixtures resulted in the selective separation of silica and alumina from iron oxide, through bioflotation and bioflocculation.

On the Recovery of Hematite from an Iron Ore Fine Fraction ...

Electroflotation is a clean technique potentially able to recover fine particles from mineral suspensions. The aim of the present work was to evaluate the electroflotation of fines and ultrafine particles of an itabiritic iron ore using a biosurfactant extracted from Rhodococcus opacus bacteria. Infrared spectroscopy and zeta potential measurements confirmed the interaction between the ...

8 Bibliographic references

2018-1-31 · Iron Ore Flotation. Oxford, Elsevier. 2012. MERMA, A.G. Fundamental aspects in the apatite – quartz bioflotation system using the . Rhodococcus opacus. bacteria as bioreagent. Doctoral Thesis. Department of Materials Engineering and Chemical and Metallurgical processes. Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro (in

BIOFLOTATION OF THE LOW GRADE SARCHESHMEH …

2012-7-26 · do not attach on the surface of copper ore. 3.2 Flotation Parameters 3.2.1 Grinding To optimize this parameter low-grade copper sulfide ore samples were grind in different percentage of ore less than 200 mesh (65–85 %< 200 mesh). Results, shown in Fig. 2, demonstrate that the finer the sample, the more will be the degree of attachment

Bioflotation of a Black Shale Copper Ore | Scientific

A sample of black shale fraction of copper ore from the Lubin deposit, Poland, was subjected to pretreatment by different microorganisms to improve the copper recovery during the subsequent flotation. Chemolithotrophic bacteria grown on So and S2O3 2- were used to depress pyrite before flotation by means of ethyl xantate as collector.

bioflotation reagents

Bioflotation of low Grade Egyptian Iron ore using Brevundimonas ... Inquire Now; Effects of toxic organic flotation reagent (aniline ... Bio-treatment of flotation wastewater has been proven to be both effective and economical, as a treatment method. Despite this, little is known regarding the effects of toxic organic floatation reagents such ...

2021-7-9 · .,,,,. 1., 100083;2., 100048;3., 265400. : 2020-05-15 ...

(PDF) Bioflotation of low Grade Egyptian Iron ore using ...

Bioflotation of low Grade Egyptian Iron ore using Brevundimonas diminuta Bacteria: Phosphorus removal khaled Selim IntroductionThe new millennium rightly belongs to biotechnology, and rapid progress in minerals processing based on biological principles is just around the corner.

Mining copper with microbes

2017-8-3 · In the future, the researchers want to establish a new bio-based approach called bioflotation. Instead of using chemical reagents, bioactive substances that are extracted from saline-adapted bacteria will be added to the ore minerals. The fact that bacteria need the iron mineral pyrite for their metabolism is already exploited in the industry ...

Siti Khodijah Chaerun | Scientific

For the economic extraction of valuable copper from such ores, the bioleaching of supergene porphyry copper ore from Sungai Max in Southeast Sulawesi of Indonesia was investigated in shake-flask experiments at room temperature (28 °C) for 14 days using an iron- and sulfur-oxidizing bacterium (Alicyclobacillus sp.) indigenous to an Indonesian ...

Bio-beneficiation of australian iron ores

Studies were carried out on the removal of alumina from iron ore slime containing (%) Fe2O3 75.7, Al2O3 9.95, SiO2 6.1, Fe (total) 52.94 with the help of Bacillus circulans and Aspergillus niger.

Bioflotation of Sarcheshmeh copper ore using Thiobacillus ...

DOI: 10.1016/J.MINENG.2004.06.005 Corpus ID: 96778634. Bioflotation of Sarcheshmeh copper ore using Thiobacillus Ferrooxidans bacteria @article{Hosseini2005BioflotationOS, title={Bioflotation of Sarcheshmeh copper ore using Thiobacillus Ferrooxidans bacteria}, author={T. Hosseini and M. Kolahdoozan and Y. Tabatabaei and M. Oliazadeh and M. Noaparast and A. Eslami and Z. Manafi …

Bioflotation: Bacteria-Mineral Interaction for Eco ...

2016-1-1 · In the current study, the action of two bacteria capable of producing biosurfactants and oxidizing iron (Fe) and sulfur (S), namely Bacillus pumilus SKC-2 and Alicyclobacillus ferrooxydans SKC/SAA-2, was investigated with respect to their ability in possessing dual-function as either bio-collector or depressant for the development of sulfide bioflotation processes.

Direct hematite flotation from an iron ore tailing using ...

2021-2-3 · The use of a biosurfactant (BS) in mineral flotation offers numerous advantages over conventional surfactants, such as their low toxicity, high degradation kinetics, and potential for selectively treating low-grade ores. In the present study, the use of a biosurfactant obtained from Rhodococcus opacus bacteria for the flotation of hematite from iron ore tailings was evaluated.

Minerals bioprocessing: R & D needs in mineral ...

2010-10-1 · Mining tailings can be additionally contaminated by chemical reagents—collectors, modifies, frothers, flocculants, etc. The use in mineral processing of substances potentially dangerous to the environment and/or human health was approx. 257.000 tons, which amounted to 1% of the total tonnage of material produced.

Feasible bioprocessing technologies for low-grade iron ...

2015-5-1 · With increasing demand for steel and depletion of high-grade iron ore deposits, more research efforts are being directed toward extending the life of existing ore reserves and developing technology to treat low-grade iron ore resources. Among all the reported technologies, biotechnologies in mineral processing — specifically bioleaching and microbially induced flotation — have emerged to ...

Cellular Adaptation: Culture conditions of R. opacus and ...

A fundamental bioflotation study should determine the response of each mineral that is present in an ore. Thus, considering that phosphate ores are associated with several gangue minerals, especially quartz, carbonates and silicates, then a detailed bioflotation study of each component is necessary to establish the bioflotation of phosphate ores.

Production of Amphiphilic Hydroxamate Siderophores ...

Marinobacter sp. DS40M6 produces the siderophores marinobactins, which are amphiphilic and contain hydroxamate functional groups responsible for a strong complexation of iron(III). First tests about growth and production conditions showed on the one hand a high rate for both growth of bacteria and siderophore production at 25°C. The pH value, on the other hand, demonstrated a contrary effect ...

Role of Pseudomonas songnenensis-Apatite Interaction …

2021-3-28 · from ore by applying microorganisms as surface modifiers to enhance one mineral''s separation from another either by flotation or flocculation [13]. Thus, it is enriched with respect to the desired valuable minerals [14]. Recently, the biological processes are becoming more attractive in mineral processing due to bacteria can act

Bioflotation and bioflocculation review: microorganisms ...

Abstract In a world of diminishing resources, current research efforts are often directed to extending the life of existing resources and developing technology to treat resources deemed uneconomic. To this end, biotechnology has been explored as a potential low cost, environmentally benign alternative to many of the current mineral processing techniques. Microorganisms and their metabolites ...

best size for beneficiation of iron ore

Bioflotation Of Iron Ore. Ore beneficiation plant The commonly seen ore beneficiation plant includes ore flotation separation plant, which is widely used to process gold ore, copper ore, zinc ore, lead ore, etc. The other is magnetic separation production line, which is widely used to process iron ore, manganese ore…

Exploitation of Bacterial Activities in Mineral Industry ...

The iron ore beneficiation was carried out by secondary metabolites produced by these heterotrophic microorganisms [76, 77]. It has been reported that in situ leaching of an iron ore with fungal strains such as Aspergillus fumigatus, Penicillium citrinum, and Aspergillus flavus resulted in 7%, 6%, and 17% removal of alumina, and 8%, 4%, and ...

Bioflotation And Bioflocculation Of Relevance To Minerals ...

Das A, Hanumantha Rao K, Sharma PK, Natarajan KA, Forssberg KSE. 1999. Surface chemical and adsorption studies using Thiobacillus ferrooxidans with reference to bacterial adhesion to sulfide minerals. Amils R, Ballester A, eds. Biohydrometallurgy and the environment toward the mining of the 21st century, Proceedings of the International Biohydrometallurgy Symposium IBS-99, El Escorial, Spain.

Optimization of hematite and quartz BIOFLOTATION by AN ...

2019-5-1 · Bioflotation exploits differences in the surface characteristics of solids suspended in an aqueous medium, ... has a great selectivity for hematite and thus it is possible to use this kind of biomolecule in the processing of iron ore. 3.3. Response surface Methodology.

Bioflotation of Sarcheshmeh copper ore using Thiobacillus ...

Request PDF | Bioflotation of Sarcheshmeh copper ore using Thiobacillus Ferrooxidans bacteria | Thiobacillus Ferrooxidans bacteria are commonly used for bio-leaching and recently in ...

talc ore oxide mineral flotation fundamentals

gangue minerals and to purify a low purity talc ore containing up to 40% gangue minerals. Also, all flotation to remove iron oxides from talc, mainly by dissolution. However . Expression levels influence ribosomal frameshifting at the - CORE ... Bioflotation of apatite and quartz: Particle size effect - SciELO ...

Studies on interaction of Paenibacillus polymyxa with iron or…

Keywords: Bioflotation, Bioflocculation, Iron ore. Introduction. The role of bacteria and bacterial metabolites in the. mineral processing industry is already well established.

Bioflotation as an Alternative Method for Desulphurization ...

Bioflotation might be developed as a new process for the removal of pyritic sulfur from fine coal. An application of bacteria to flotation would shorten the periods of the microbial removal of pyrite from some weeks by leaching methods to a few minutes.

Electrochemical Characterization of Sulphide Minerals ...

2021-7-6 · Chalcopyrite (CuFeS 2) is one of the most widely used minerals for copper production processes is frequently found associated with iron sulphide minerals such as pyrite, which are considered as gangue and removed by flotation to reduce their concentration during copper minerals processing.[] In a flotation unit, the ore particles are mixed with water to form a pulp and their surface ...

Minerals | Free Full-Text | Review of Potential Microbial ...

Previously, bioflotation and bioflocculation using known selected microorganisms or produced biomolecules have been tested as flotation reagents, enhancing the selective separation of minerals at laboratory scale [1,2].Microorganisms can flocculate finely dispersed minerals [].Bioleaching, which dissolves metals from sulphidic minerals in acidic conditions with the help of iron- and sulphur ...

1 Introduction

The evolution of Iron ore beneficiation should be considered of great interest due to fasten rise and establishment. Iron ore flotation has short history, starting in America, back in 1930s, when the commercial practice of iron ore flotation was limited. In 1947, Clemmer reviewed the …

Developments in Biotechnology for Environmentally Benign ...

2013-7-3 · Biogenesis of iron ore deposits has been established and biomineralization constitute an important basis for the formation of several iron oxides, clay minerals, phosphates, sulfides as well as aluminium oxyhydroxides and silicates [10–16].Biotic and abiotic mechanisms are involved in the formation of iron ore minerals, and biogenic iron minerals exhibit close association with several ...