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Thursday, July 30, 2020 | History

2 edition of Weathering of a base-metal sulfide leaching residue found in the catalog.

Weathering of a base-metal sulfide leaching residue

T. G. Carnahan

Weathering of a base-metal sulfide leaching residue

by T. G. Carnahan

  • 179 Want to read
  • 34 Currently reading

Published by U.S. Dept. of the Interior, Bureau of Mines in [Avondale, Md.] .
Written in English

    Subjects:
  • Sulphides -- Environmental aspects.,
  • Tailings (Metallurgy) -- Environmental aspects.,
  • Weathering.,
  • Leaching -- Waste disposal.

  • Edition Notes

    Bibliography: p. 11.

    Statementby T.G. Carnahan and M.A. Lucas.
    SeriesReport of investigations / United States Department of the Interior, Bureau of Mines ;, 8667, Report of investigations (United States. Bureau of Mines) ;, 8667.
    ContributionsLucas, M. A.
    Classifications
    LC ClassificationsTN23 .U43 no. 8667, TD196.M4 .U43 no. 8667
    The Physical Object
    Pagination11 p. :
    Number of Pages11
    ID Numbers
    Open LibraryOL3139897M
    LC Control Number82600071

    bacterial heap leaching of refractory gold sulphide ores. Bacterial oxidation process to leach gold is roughly divided into three stages: (1) using bacteria culture medium to cultivate thiobacillus ferroxidans, etc. and preparation for sulfuric acid bacteria leaching solution of Ph=–; (2) bacteria catalyzing, oxidizing and re-moving arsenic and sulfur; (3) the residue from pretreatment.   Abstract. Base-metal smelters typically produce a large quantity of waste rocks, tailings and slags that are usually stored on site. In the early s, metallurgical slags were considered chemically inert because metals are usually embedded in glass and silicate phases.

    Acid leaching of oxide–sulfide copper ore prior the flotation – A way for an increased metal recovery Miroslav D. Sokić1, Vladan D. Milošević1, Velizar D. Stanković2, Vladislav ić1, Branislav R. Marković1 1Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia 2University of Belgrade, Technical Faculty, Bor, Serbia. Report of Investigations Recovery of Silver, Gold, and Lead From a Complex Sulfide Ore Using Ferric Chloride, Thiourea, and Brine Leach Solutions.

    A process for the recovery of nickel and cobalt from nickel and cobalt containing ores, including the steps of first leaching a laterite ore and/or a partially oxidized sulfide ore with an acid solution to produce a pregnant leach solution containing at least dissolved nickel, cobalt and ferric ions, and subsequently leaching a sulfide ore or concentrate with the pregnant leach solution to. Dump leaching: In the s the copper industry (Zimmerley et al., ) began exploiting bioleaching in a process called dump leaching to facilitate the extraction of copper from marginal-grade, sulfidic ores (typically less than % copper), usually mined from porphyry and supergene low-grade materials are blasted in the pit and hauled as large rock fragments to dumps.


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Weathering of a base-metal sulfide leaching residue by T. G. Carnahan Download PDF EPUB FB2

Additional Physical Format: Online version: Carnahan, T.G. (Thomas G.). Weathering of a base-metal sulfide leaching residue. [Avondale, Md.]: U.S. Dept. of the. The Bureau of Mines conducted laboratory-scale weathering research on a leach residue containing elemental sulfur and mixed metal sulfides.

Experiments were performed to determine ph and impurity element concentrations in the effluents as functions of time and to determine the effects on effluent concentrations of mixing the residue with dolomite tailing material. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http.

Sahu and Asselin (), identified ferrihydrite in one of thirteen medium temperature sulfide leach residue samples. Steel et al. (), identified phases which were soluble in the reagents. Modified weathering cell tests were conducted at two different temperatures, room temperature (19 °C) and close to freezing temperature (3 °C), to understand the effect of temperature on the potential mobility of elements from the flotation tailings.

On the 18th day of leaching, the weathering cells stored at 3 °C were involuntarily : Sophie Costis, Lucie Coudert, Kristin K. Mueller, Emmanuelle Cecchi, Carmen Mihaela Neculita, Jean-F.

P.R. NorrisSelection of thermophiles for base metal sulfide concentrate leaching, Part II: nickel-copper and nickel concentrates Miner. Eng., (), pp. The leaching experiments were carried out in shake flasks ( rpm) with 5 g black schist samples in ml mineral salts solution [ g/l of each K 2 HPO 4, (NH 4) 2 SO 4, and MgSO 4 7H 2 O; initial pH ] at 22 ± 2 °C.

The experimental details are listed in Table 2.A mixed culture stock that had been cultivated with the black schist sulfide ore was used as the inoculum.

A laboratory weathering study using a humidity cell procedure was conducted on two sulfide-bearing tailing samples from a metallurgical site in Ontario (Canada). The test was accompanied by microbiological studies to enumerate the major groups of sulfur-oxidizing bacteria and determine their potential role at different stages during the.

Highest extraction of both metals was achieved from bioleach residue of the 42 °C experiment, which also accounted for the highest base metal recovery during bioleaching. Pt recoveries were similar for the 65 °C and reductive bioleaching residues, while Pt leaching from the 30 °C residue.

Copper sulfide minerals from the secondary zone are also processed using bio-heap leaching combined with SX/EW at a number of locations worldwide (Neale et al., ; Watling, ). Biochemical leaching is now a well-established commercial process for treating gold ores in which the gold is enclosed within sulfide minerals.

Biochemical oxidation of the sulfide minerals releases the gold and allows it to be leached by the chemicals used in conventional gold leaching. Observations on the weathering of nickel sulfide bodies in the Yilgarn craton were first reported for the Kambalda deposits (Woodall and Travis, ).Subsequently, comprehensive studies of several of the principal deposits have been undertaken, with the objectives of (1) characterizing the weathered profiles over the sulfide bodies and their wall rocks, (2) investigating the processes of.

The representative sulfide minerals in the gold concentrate were pyrite with minor galena. Mineralogical characterization was conducted on the gold concentrate using g/t based on lead-fire assays. During the leaching experiment, the effect of nitric acid concentration was studied.

Assessing weathering in field cell experiments using quantitative mineralogy and sequential leaching Charlene Haupt, Louis Kabwe, Bern Klein, Alberto Jorge, Emre Altun Mining Engineering, University of British Columbia, Vancouver, Canada Abstract The objective of this study was to characterize the weathering behavior of select samples from the non acid producing waste rock materials at the.

Hydrochloric Acid-oxygen Leaching and Metal Recovery from a Copper-nickel Bulk Sulfide Concentrate Volume of Report of investigations: Authors: Gary A. Smyres, Kenneth P. Lei, Thomas G. Carnahan: Contributor: United States. Bureau of Mines: Publisher: U.S.

Department of the Interior, Bureau of Mines, Original from: the University. The chlorine is used to regenerate ferric chloride in the leaching solution. The process was tested on both a bench scale and a larger scale which had a capacity of kg of lead metal per day.

The large-scale leaching and electrolysis tests were performed in three day and six 5-day campaigns, during a period spanning 28 mo. a sulfide ore material containing sulfide iron and values of one or more metals in the group consisting of copper, nickel, cobalt and silver, is subjected to leaching with an aqueous solution of nitric acid under conditions controlled to insure the formation of easily filterable hydrogen jarosite (3o), or a similar butless desirable iron compound (2o), which in.

Weathering is strongly seasonal because of the Arctic climate, which produced a daily sulfide-depletion rate corresponding 0–% and a peak annual depletion of kg or % of the remaining. The level of oxidation after two cycles of pre-leaching with biogenic ferric iron ( min) at 80°C was, and % for iron, arsenic, and sulfur of all sulfide minerals, respectively.

In the leach residues, it was determined that some new precipitates, such as PbSO 4, CaSO 4 and SiO 2, were formed, which co-precipitated a certain amount of Ga and Ge from the leach solution. Whether sulfuric acid generated is locked up in the residue and/or is present in the leach liquor, it can be employed to leach other minerals such as those present in nickel laterite ores.

For a low-grade nickel concentrate, such as that used in this study, a significant fraction of the sulfide is associated with iron.Methods of leaching sulphide ores can be: in absence of oxidizing agents in presence of oxidizing agents Bacterial leaching Absence of oxidizing agents Acid leaching: Dilute acids dissolve some metal sulphides with liberation of H2S, e.g.

ZnS + 2H+ ^ Zn2+ + H2S Three types of sulphides can be encountered. Completely soluble sulphides: Zns, CoS, NiS, FeS Slightly soluble, e.g. FeS2. Insoluble.Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures.

The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the.