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1991
The cleanest kinds of precious metal scrap are old jewelry, metal parts of old dentures, and the dust and bits produced in the manufacture of jewelry or dentures. Old jewelry may be made of sterling1 silver, carat2 gold (alloyed gold), or of base metals plated with gold.
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The cleanest kinds of precious metal scrap are old jewelry, metal parts of old dentures, and the dust and bits produced in the manufacture of jewelry or dentures. Old jewelry may be made of sterling1 silver, carat2 gold (alloyed gold), or of base metals plated with gold.
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On the interpretation of recovery stage III in gold
Radiation Effects, 1983Abstract The paper compares a recent investigation of Stage-Ill recovery on electron-irradiated gold by Sonnenberg and Dedek with earlier work on cold-worked or quenched gold. The experimental results of Sonnenberg and Dedek are found to be in excellent agreement with those of Schule, Seeger, Schumacher, and King, who showed that in Au Stage III is due
Alfred Seeger, Werner Frank
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Selective recovery of gold on functionalized resins
Hydrometallurgy, 2014Abstract The functional resins containing guanylthiourea, 1-methylimidazole, 2-mercapto-1-methylimidazole, dipropylamine, 1,2-dimethylimidazole and 1-(3-aminopropyl)imidazole ligands were highly selective for the gold(I) and silver(I) from ammonia solution and they did not sorb ammine complexes of copper(II). The kinetics of gold(I) sorption on these
Magdalena Pilśniak-Rabiega +1 more
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Predicting gravity separation gold recoveries
Mining, Metallurgy & Exploration, 1995A novel methodology for estimating gold recoveries in gravity-separation circuits is presented. The methodology makes use of a population-balance model. The model represents gold liberation, breakage and classification behavior and applies preconcentration and recovery-performance curves to gravity-recoverable gold.
A. R. Laplante +2 more
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Recovery of Gold from Solutions
1991Cyanidation has been used to extract gold (and silver) from ores, concentrates, and calcines since the 1890s. The precipitation of gold from cyanide solutions by zinc cementation was patented in 1884 and was applied industrially as early as the cyanidation process.
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Recovery of quenched-in resistivity in doped gold
Il Nuovo Cimento, 1963Changes in electrical resistivity of quenched gold wires, to which small amounts of silver, nickel, and antimony were added, have been studied in detail at annealing temperatures in the range (20÷170) ‡C. Some results with Ag-doped specimens were explained in a previous paper by assuming the formation of vacancy-impurity complexes whose binding energy ...
F. Cattaneo, E. Germagnoli
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Recovery and refining of gold and silver : a review
2022This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
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Ferrocene-based metal-organic framework for highly efficient recovery of gold from WEEE
Chemical Engineering Journal, 2021Jiyang Liu, Zheng Deng, Haojie Yu
exaly