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Friday, May 15, 2020 | History

1 edition of Hydrometallurgical treatment of electronic scrap to recover gold and silver found in the catalog.

Hydrometallurgical treatment of electronic scrap to recover gold and silver

Hydrometallurgical treatment of electronic scrap to recover gold and silver

  • 215 Want to read
  • 33 Currently reading

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

    Subjects:
  • Gold -- Metallurgy.,
  • Silver -- Metallurgy.,
  • Hydrometallurgy.,
  • Precious metals -- Recycling.,
  • Electronics -- Materials -- Recycling.

  • Edition Notes

    Bibliography: p. 11.

    Statementby H.E. Hilliard ... [et al.].
    SeriesReport of investigations / United States Department of the Interior, Bureau of Mines ;, 8940, Report of investigations (United States. Bureau of Mines) ;, 8940.
    ContributionsHilliard, H. E.
    Classifications
    LC ClassificationsTN23 .U43 no. 8940, TN770 .U43 no. 8940
    The Physical Object
    Pagination20 p. :
    Number of Pages20
    ID Numbers
    Open LibraryOL2998850M
    LC Control Number84600340

    Distribution and analyses of gold and silver in mechanically processed mixed electronic scrap [microform] / by B.W. Dunning, Jr., F. Ambrose, and H.V. Makar Book Bib ID. The impure silver and gold plus palladium products represent about Wt pct of the high-tension-separated metal concentrate. Included is a three-step process evaluation study of mechanical processing of general electronic scrap and two hydrometallurgical procedures for leaching high-tension-separated metallic concentrates obtained from the mechanical processing gama-uk.com by: 7.

    Thus, gold becomes a candidate for recovery. Further, they have also demonstrated an average gold recovery rate of 95% from contactors by mechanical and chemical processing. [22] Dunning B. W. Jr. et al () have discussed the recovery of Precious Metals from Electronic Scrap and Solder used in Electronics Manufacture. [8]. Pyrometallurgical Recovery Of Metals From Electronic Waste Environmental Sciences Essay. The residual percent holds the valuable metals such as gold, silver, platinum and palladium. (Aspergillus Niger, Penicillium Simplicissmum) and Thiobacillus bacteria can enable metal filtering from electronic scrap. To recover gold, copper etc.

    Jun 13,  · 1. COMSATS Institute of Information and Technology Lahore Department of Chemical Engineering Synopsis Development of non-hazardous process for leaching of metals from electronic scrap and their characterization 2. Problem Statement Recovery of gold and silver from electronic scrap using non-hazardous leaching process. Now, if you want to make your own personal scrap fortune, today’s your lucky day, so keep reading, I’m giving pearls here folks! Besides cellphones, gold and other precious metals can be found in almost all types of electronic circuits, ranging from computer main-boards to processors and what not.


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Hydrometallurgical treatment of electronic scrap to recover gold and silver Download PDF EPUB FB2

Hydrometallurgical Treatment of Electronic Scrap to Recover Gold and Silver US Bureau of Mines Report RI E-Waste has become a huge issue in todays market, and companies are making millions recovering precious metals from this scrap. Very little information on this subject is. Jun 09,  · E-Waste Gold - Recovery of Gold & Other Precious Metals From Electronic Waste (Surplus Secrets Book 1) - Kindle edition by Joe Willard.

Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading E-Waste Gold - Recovery of Gold & Other Precious Metals From Electronic Waste (Surplus Secrets Book /5(18).

Aug 05,  · Recovering Gold & Other Precious Metals from Electronic Scrap - Kindle edition by Au Notes. Download it once and read it on your Kindle device, PC, phones or tablets.

Use features like bookmarks, note taking and highlighting while reading Recovering Gold & Other Precious Metals from Electronic Scrap/5(12). Since the mids, the trend has shifted toward the hydrometallurgical processing of scrap.

The emphasis has always been on the recovery of precious metals, namely gold, silver, platinum and palladium, from electronic scrap for their obvious economic gama-uk.com by: A hydrometallurgical method for the recovery of silver from electronic scrap materials is suggested. Electronic scrap materials, containing silver with the accompanying brass and beryllium bronze, are leached at 80°C with ferric gama-uk.com by: This work aims to establish a general methodology in the laboratory to recover gold, silver and platinum group present in electronic waste, also explore other forms of recovery of metals contained.

Rapid technological development induces increase of generation of used electric and electronic equipment waste, causing a serious threat to the environment. Waste printed circuit boards (WPCBs), as the main component of the waste, are significant source of base and precious metals, especially copper and gold.

In recent years, most of the activities on the recovery of base and precious metals. Although copper is the principal metal in most electronic scrap, printed circuit boards in mobile phones also contain a significant amount of silver, gold and palladium.

A bench-scale extraction study was carried out on the applicability of economically feasible hydrometallurgical processing routes to recover these precious metals. RECOVERY OF PRECIOUS METALS FROM ELECTRONIC SCRAP by R. Dannenberg,1 J. Maurice,2 and G. Potter3 ABSTRACT The Bureau of Mines investigations described in this report were under­ taken to devise a process to economically recover precious metals and copper.

Menetti and Tenório (b) investigated gold and silver recovery from the physical treatment of electronic scrap to produce metallic concentrates. Gold and silver present in a sample of electronic scrap were solubilized with N HNO3 solution. The leached pulp was treated with a N H2SO4 solution to cause gold sulfate precipitation.

The. The Bureau of Mines investigated hydrometallurgical procedures for concentrating precious metals from a mechanically processed metal fraction of obsolete military electronic scrap. Feed material for the leaching procedures described in this report was the high-tension-separated metal concentrate obtained as a fraction from mechanically processing partially stripped electronic units.

Gold, silver, copper, and palladium contributed to more than 91% of the total worth of metals found in PCBs, and thus these four metals were selected for further study.

The total value of these metals added up to $ per kg of PCB. METAL RECOVERY PROCESS The proposed approach for.

Sep 29,  · The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process.

This paper presents a promising hydrometallurgical process to recover Cited by: Recovery of precious metals from electronic scrap by hydrometallurgical processing requires cyanidation and solvent extraction.

As in primary gold production, cyanide dissolves the precious metals. As in primary gold production, cyanide dissolves the precious metals. given to the initial treatment of residues using comminution procedures followed by pyrometallurgical, hydrometallurgical, electrochemical, and biotechnological techniques.

Menetti and Tenório [4] depicted the steps of a research project for gold, silver, copper, iron, aluminum, tin, and zinc recovery from electronic scrap. The authors researched. A hydrometallurgical process for treating copper feed materials containing gold and/or silver by simultaneously leaching copper, gold and/or silver into an aqueous cyanide solution, recovering Cited by: Hydrometallurgical treatment of electronic scrap to recover gold and silver.

[Avondale, Md.]: U.S. Dept. of the Interior, Bureau of Mines, (OCoLC) Although some of the agents were effective in treating selected items- such as nitric acid for silver-bearing items, aqua regia for gold-bearing items, and cyanide for thin exposed plating of silver or gold-none of the reagents was applicable to complex scrap bearing both silver and gold as well as the less soluble platinum-group metals.

Hydrometallurgical treatment of electronic scrap to recover gold and silver / By D. Soboroff, D. Kramer, B. Dunning and H. (Henry E.) Hilliard Abstract. routes to recover silver, gold and palladium from waste Electronic Scrap Gold, Silver, Palladium Shredding Magnetic & Eddy current separation of Fe and Al Non-metallic separation (flotation or air blowing Leaching with HBF 4 Recovery of precious metals Fe and Al fraction Plastics and other non- metalic, about 65 wt.% Solder recovery by.

Apr 17,  · This video shows the refining process steps for leaching precious metals used by professional refining companies. Silver, Gold, Platinum, Palladium and the .Sep 29,  · This paper presents a promising hydrometallurgical process to recover precious metals from waste PCBs.

To simplify the metal leaching process, large pieces of PCBs were used instead of a pulverized sample. The chemical coating present on the PCBs was removed by sodium hydroxide (NaOH) treatment prior to the hydrometallurgical gama-uk.com by: The present invention deals with hydrometallurgical process for the extraction of non-ferrous precious metals originating from electronic waste, mineral earth, mineral materials.

The process includes reacting the dust like fraction of crushed waste or mineral material with concentrated hydrohalogen acid containing a halogen salt of gama-uk.com by: