Home » Grinder Mill>why bioleaching might be useful for ore containing only a small percentage of copper

why bioleaching might be useful for ore containing only a small percentage of copper

Mission 2015: Bioleaching - MIT

Economic exploitation of smaller deposits, in remote locations, becomes viable ... An acidic solution containing bacteria is applied and allowed to percolate ... The process can be used on ores that are only 0.5 to one percent copper, too little...

More details » Get Price

Mineral-munching microbes: the future of metal mining? - Mining ...

Aug 2, 2012 ... With demand for copper on the up and the number of high-grade ... copper, many sites now have concentrations of only one percent. ... effective that dump and heap bioleaching of secondary copper ores ... "The same microorganisms can also be used to oxidise sulphidic ores which contain gold or silver.

More details » Get Price

Application of bioleaching to copper mining in Chile - SciELO

May 15, 2013 ... can be recovered by cementation with scrap iron or by solvent extraction ... Not long ago ores used to contain 5% copper or more, but nowadays .... situation in gold mining is different because of the much smaller volumes involved. ... of heavy metals sulphides is considered the only relevant mechanism.

More details » Get Price

Application of bioleaching to copper mining in Chile | Acevedo ...

May 15, 2013 ... Not long ago ores used to contain 5% copper or more, but nowadays ... This can be the case for secondary minerals such as covellite and .... both kinetic parameters and percentage of copper extraction. .... It is worthwhile noticing that not only low-grade ores are being bioleached but also minerals with...

More details » Get Price

8 Microbial Leaching of Metals - Wiley-VCH

6.1 Commercial-Scale Copper Ore Bioleaching 208. 6.2 Reactor ... occurring microorganisms” or “the use of mi- croorganisms to ... some small differences by definition (BRIER- ... might have been involved in the mobilization ... only in 1961, when Thiobacillus ferrooxidans ... the manual recovery of copper-containing mine.

More details » Get Price

Pretreatment of copper ore prior to heap leaching - University of Utah

used for primary crushing and cone crushers are used for secondary crushing. ... sulfide ore might be due to the high head grade (0.8% Cu for the copper ...... Most of the copper ores contain only a very small percentage of copper ... Bioleaching and autoclave [4] leaching are also performed depending on ore type and.

More details » Get Price

Biomining goes underground : Nature Geoscience : Nature ...

Feb 27, 2015 ... Ore bodies buried deep in Earth's crust could meet increasing global ... In biomining, fluids generated by and containing bacteria and ... Worldwide, about 15% of copper, 5% of gold and smaller percentages of other base metals, such .... The liquors that would be used for deep in situ bioleaching would be...

More details » Get Price

Bioleaching of chalcopyrite - eTheses Repository - University of ...

Any use made of information contained in this thesis/dissertation must be in ... However, it is not only bacteria that play an important role in copper dissolution; also ... growth and the percent extraction of copper dissolution amongst those considered. ...... Not all ore types even those containing sulphur can be bioleached.

More details » Get Price

Unit R071 - Production processes - Teacher instructions (PDF ... - OCR

The process allows iron ore with significant impurities to be used, and ... Electricity is passed through solutions containing copper compounds eg, copper ... Bioleaching - Using bacteria to separate copper from copper sulphide. ... too much acid –which has to be neutralised and it can take years to extract only 50% of the.

More details » Get Price

Download PDF - Springer

solute transport during heap bioleaching of copper sulfide ... At or near the surface of ore particle, the acid concentration is relatively higher than that ... reactions [6]. However, mathematic models can be used ... of oxidation of mining heaps containing pyrite, and .... The cubic REV includes only fluid and is consistent with the...

More details » Get Price

Column bioleaching copper and its kinetics of waste printed circuit ...

Citation Only ... In this work, a column bioleaching of copper from waste printed circuit ... In bioleaching process, the formation of jarosite precipitate can be prevented by ... commercially used especially for the recovery of copper from low-grade ores ... Because WPCBs contain some metallic oxides and alkaline substances,...

More details » Get Price

University of Zurich - Zurich Open Repository and Archive

such as gold-containing electronic scrap, silver-containing jewelry waste, ... Five percent of silver was microbially mobilized from powdered ... cyanide-complexed copper was detected during treatment of electronic ... Bioleaching ... However, only small amounts of platinum (0.2%) were mobilized from spent automobile.

More details » Get Price

A Simulation Study on Model Predictive Control and Extremum ...

... secondary ores. Recently, it has been proposed to use feedback control to improve ... copper extraction, heap bioleaching offers a number of ... Heap bioleaching can operate on low-grade ores that ... mineral is carried out until a pre-determined percentage .... curacy small variations of the response around the nominal.

More details » Get Price

AQA | Chemistry | Subject content | 3.3 Unit 1: Chemistry 1

A substance that is made of only one sort of atom is called an element. .... Copper can be easily extracted but copper-rich ores are becoming scarce so ... bioleaching uses bacteria to produce leachate solutions that contain metal compounds. .... a) Hydrocarbons can be cracked to produce smaller, more useful molecules.

More details » Get Price

talvivaara sotkamo mine – bioleaching of a polymetallic nickel ore in ...

also produce zinc (approximately 90,000 tpa), copper (approximately 15,000 ... JORC code with 0.07% Ni cut-off at 1004 million tons, containing 0.23% of nickel, ... As a result, the drilling pattern and hole sizes are on average smaller than in .... The pH of the bulk solution is an important parameter in bioleaching processes.

More details » Get Price

biologically assisted extraction of metals from ores-concentrates ...

copper, cobalt, and gold from sulphide and/or iron containing ores and ... to bacterial action, microorganisms can be used to recover gold from certain types ... paper reviews bioleaching reactions, the role of microorganisms, factors ... percentage of the gold cannot be recovered by .... have no cell wall, only a cell membrane.

More details » Get Price

AQA GCSE Science C1 notes - SlideShare

Mar 27, 2013 ... 20C1.5 OTHER USEFUL SUBSTANCES FROM CRUDE OIL .... A substance that is made of only one sort ofatom is called an element. ... the names and the symbols of the elements.c) Atoms have a small central nucleus, which is made up .... Copper can also be extracted by phytomining, or by bioleaching:•...

More details » Get Price

insitu remediation summary & history of copper cementation and ...

weathering of sulphide minerals and of coals containing sulphides. Indeed, it was estimated ... important catalysts in the extraction of metals in bioleaching processes. ... Thus far, only two commercial currently operating ISL copper recovery ... a current focus as the flat lying copper ore deposits are spread out and may not be.

More details » Get Price

application of shrinking core model to bioleaching of black shale ...

Jun 1, 2006 ... Poland) were leached in a small column using autotrophic bacteria ... The model is based on assumption of dependence of copper .... Most of the data concern sulphide ores bioleaching ... containing: KH2PO4: 0.1 g/l and MgSO4·7H2O: 0.1 g/l. ..... The solution obtained can be useful only to describe the.

More details » Get Price

Previous:cnc pmt grinding micro prog
Next:used jaw crusher for sale

Add.: South Jinqiao Area,Pudong New Area, Shanghai, China.

Postal code: 201201

Tel.: +86-21-58386189, 58386176

Fax: +86-21-58386211

E-mail: [email protected]