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A study of sulphur xanthates in relation to their role in froth flotation of sulphide minerals

- Honeyman, Ronald

Authors: Honeyman, Ronald
Date: 1980
Type: Text , Thesis , Masters
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Description: Potassium alkyl xanthates are commonly used as collectors in the flotation of sulphide minerals. Much research has been directed to the formulation of mechanisms responsible for the hydrophobicity of the sulphide minerals in xanthate flotation. Alkyl dixanthogen plays an important role in this mixed-potential mechanism, and is regarded as the species which imparts hydrophobicity to the mineral surface. Winter has recently suggested that sulphur xanthates, which are chemically very similar to alkyl dixanthogen, may play a significant role in the processes rendering the sulphide minerals hydrophobic during froth flotation. The aim of this investigation was to develop techniques for the separation and identification of sulphur xanthates at very low levels of conecentration. Techniques employed were Molecular Emission Cavity Analysis Spectroscopy and High Performance Liquid Chromatography. It was possible to extract the sulpur xanthates from simulated flotation liquors, separate the individual species, and determine them to a level of 0.05 ppm in the liquor. Aklyl sulphur dixanthates were found to disproportionate in methanol solution.
Description: Masters Degree in Applied Science

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Traces of the female self : exploring the documentation of women’s art through traces, impressions, residues and self-portraiture via contemporary art practice

- Janetzki, Georgia

Authors: Janetzki, Georgia
Type: Text , Thesis , Masters
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Description: Women have always been present as artists, but not necessarily included within the canon of Western art history. Studying the canon is an accepted way of understanding the context of what has gone before, and in turn positioning ourselves within contemporary art practices and theories. However there is a disconnect when most of the individuals within the canon are nothing like us. Self-portraiture can be an embodied methodology, a starting point for an investigation that goes beyond oneself. Addressing the personal through my art practice also addresses a wider community of female artists. Through a studio-based investigation I have asked: What can visual art’s inherent capacity for generating and capturing traces, residues and impressions express in a material and conceptual way to explore self-identity and contribute to the current discourse about women artists’ history? How can these themes be visually expressed in new ways through contemporary selfportraiture, addressing absence and perspective in the documentation of women’s art? I explore these questions through experimental methods of making self-portraits. This research project considers the personal, examining representation of the self as an ontological enquiry into the roles of making and being. As a practice-led study, I pursue this line of enquiry as a means for exploring current structures of power, through a new body of work aimed at further informing Australian women’s art practice and its history.
Description: Masters by Research

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