Title

Decoppering of Liquid Lead Bullion by Elemental Sulphur Additions -- Part 2: Mechanism and Model for Decoppering

Alternative Title

Mechanism and model for decoppering

Abstract

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.

Department(s)

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)

3719553

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1993 Institute of Mining and Metallurgy (IOM3), All rights reserved.

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