Decoppering of Liquid Lead Bullion by Elemental Sulphur Additions -- Part 2: Mechanism and Model for Decoppering
Mechanism and model for decoppering
Kinetic model has been developed that is capable of predicting the extent of decoppering and the growth of sulphide layers as a function of time when liquid elemental sulphur is added to liquid lead bullion. The model assumes that the rates of sulphidation of the lead and copper of the bullion are controlled solely by the rates of diffusion of lead and copper ions through the sulphide layers produced. Incorporation of experimentally measured diffusion coefficients for lead and sulphur into the model produces good agreement with the observations of previous workers on lead decoppering, both in the presence and in the absence of silver.
B. S. Terry et al., "Decoppering of Liquid Lead Bullion by Elemental Sulphur Additions -- Part 2: Mechanism and Model for Decoppering," Mineral Processing and Extractive Metallurgy, vol. 102, pp. C63-C69, Institution of Mining and Metallurgy (IOM3), Jan 1993.
Materials Science and Engineering
Keywords and Phrases
Diffusion; Sulfur; Copper sulfide formation; Elemental sulfur additions; Experimental measured diffusion coefficients; Liquid lead bullion decoppering
International Standard Serial Number (ISSN)
Article - Journal
© 1993 Institute of Mining and Metallurgy (IOM3), All rights reserved.