Dissolution mechanism of silver in molten slags

Joo Hyun Park, Dong Joon Min

Research output: Contribution to conferencePaper

Abstract

The solubility of silver in the MO-B2O3 (MO = CaO, BaO, and Na2O) and CaO-RO (RO = SiO2 and Al2O3) slags was measured at high temperatures to understand the thermodynamic behaviour of silver in molten slags and to obtain the measure of basicity. The dissolution of silver both into the acidic and basic slags at Po2 ≤ 10-13 atm is represented by the following reactions: Ag(1)+ 1/4O2(g)=Ag+(slag)+ 1/2O2-(slag) (in the acidic slags) Ag(1)+O2-(slag)=Ag2-(slag)+1/2O2(g) (in the basic slags) The dissolution of silver into the basic slags at Po2 ≥ 10-13 atm is represented by the following reaction from the effect of slag basicity and oxygen partial pressure on silver solubility. Ag(1)+1/2O2(g)+O2-(slag)=AgO22-(slag ) The viscosity, which is affected by slag basicity, can be quantified by introducing the basicity scale obtained from silver solubility in the slag.

Original languageEnglish
Pages439-443
Number of pages5
Publication statusPublished - 2000 Dec 1
EventInternational Congress on Mineral Processing and Extractive Metallurgy (Minprex 2000) - Melbourne, Australia
Duration: 2000 Sep 112000 Sep 13

Other

OtherInternational Congress on Mineral Processing and Extractive Metallurgy (Minprex 2000)
CountryAustralia
CityMelbourne
Period00/9/1100/9/13

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Park, J. H., & Min, D. J. (2000). Dissolution mechanism of silver in molten slags. 439-443. Paper presented at International Congress on Mineral Processing and Extractive Metallurgy (Minprex 2000), Melbourne, Australia.