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A conceptual model for the role of oxygen in xanthate adsorption on galena.

Authors
Maust-EE Jr.; Richardson-PE; Hyde-GR
Source
College Park, MD: U.S. Department of the Interior, Bureau of Mines, RI 8143, 1976 Jan; :1-56
Link
NIOSHTIC No.
10007767
Abstract
The present work is part of an ongoing Bureau of Mines effort to provide a better understanding of the fundamental phenomena involved in sulfide flotation, the role of oxygen in xanthate adsorption being one essential issue. Galena was chosen as the material around which to develop a conceptual model, partly because of its demonstrated oxygen sensitivity and partly because information on its properties and flotation behavior constitute the largest part of the fundamental information available on sulfides of commercial importance. The model is formulated primarily in terms of surface electronic energy levels produced by oxygen and xanthate and is further developed using existing experimental evidence and its implications. Four major functions of oxygen are elucidated, and the relationship of these to the formation of lead xanthate, dixanthogen, and a surface compound is discussed. Though yet incomplete, the model provides a useful framework within which the results of diverse experiments can be related to one another in their proper perspective, as shown by a brief discussion and resolution of some apparently discordant results reported in the literature.
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-259474
NTIS Price
A05
Identifying No.
RI-8143
NIOSH Division
CPRC
Source Name
A conceptual model for the role of oxygen in xanthate adsorption on galena
State
MD
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