Abstract
The paper deals with the results of characterisation and flotation studies carried out on a low grade and complex copper ore sample with a view to design process for its concentration. Flotation studies were carried out under varying conditions of process parameters. Effects of granulometry of the feed, dosage of sodium iso-propyl xanthate as collector, pH and gangue depressant/dispersant were studied. Sulphidization technique and use of potassium octyl hydroxamate as auxiliary collector for flotation of oxidised minerals were observed to enhance copper recovery. Use of sodium silicate as depressant/dispersant for siliceous gangues helped in improving grade of copper concentrate. Rougher followed by multi-stage cleaning were found necessary to produce a high grade copper concentrate. Based on the studies undertaken the process was designed for concentration of the low grade copper ore sample.
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