Silicon activity in liquid Fe-Co-Cu-Si

Authors: Banda, W.1; Georgalli, G.A.2; Eksteen, J.J.1; Lang, C.3

Source: Mineral Processing and Extractive Metallurgy, Volume 118, Number 3, September 2009 , pp. 182-185(4)

Publisher: Maney Publishing

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Abstract:

The activity of silicon in the liquid Fe-Co-Cu-Si system was studied by chemical equilibration using a gas/silica/alloy technique at 1450°C. This was carried out in the compositional range relevant to the ferrocobalt alloy produced during slag cleaning of copper waste slags. The activity of silicon was investigated for the quaternary (Fe-Co-Cu-Si) system as well as the ternary subsystems. The results show a large negative deviation from ideal solution (Rauoltian) behaviour. The activity coefficient of silicon was found to be in the magnitude of 10-3.

Keywords: ACTIVITY; SILICON; FERROCOBALT

Document Type: Research article

DOI: 10.1179/174328509X408252

Affiliations: 1: University of Stellenbosch, Department of Process Engineering, Stellenbosch, South Africa 2: University of Stellenbosch, Department of Process Engineering, Stellenbosch, South Africa;, Email: g.a.georgalli@gmail.com 3: University of Cape Town, Department of Mechanical Engineering, Cape Town, South Africa

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