Fine Gold Extraction Problem from Industrial Sludge

Abstract:

Error reasons of gold analytical determination in the chemical plant sludge are studied. The studied sludge is waste of BaCl₂ production. According to preliminary estimates it contains gold in sufficient quantity for industrial extraction. Comparison of direct sludge fire assay analysis and sludge dissolution in aqua regia, followed by gold atomic absorption determination in solution is made. The negative effect of Na⁺, Ca²⁺, Ba²⁺, Zn²⁺ ions presence in studied solutions was shown. Error quantitative estimate at alkali metals introducing into standard solutions is given. It is shown that Ca²⁺ and Ba²⁺ ions contribute the most error. Error increases linearly at addition of Ca²⁺ and Ba²⁺ ions. Growth error gradually slow down at increasing Na⁺, Zn²⁺ ion content.

• Periodical: Materials Science Forum (Volume 989)
• Pages: 564-568
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.989.564
• Online since: May 2020
• Authors: R.E. Khabibulina, Vladimir G. Lobanov, Konstantin D. Naumov*
• Keywords: Atomic Absorption, Barium, Calcium, Fire Assay, Gold, Natrium, Zinc

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