ABSTRACT
The investigation results of the slags obtained in a newly developed process of continuous converting to blister copper of a mixture of nickel-containing copper matte and concentrates are presented. X-ray, SEM, EPMA and other methods were used to obtain the results. The slags are within the FeO-Fe2O3-SiO2-CaO-Al2O3-Cu2O-NiO system and are found to be prone to saturate trevorite (NiFe2O4)-based spinels whose content depends significantly on the consumption of fluxing components and on the changes of total concentration in the slag of (FezNi) and (SiO2zCaO). It is found that these slags are homogeneous in the range of SiO2/CaO ratios from 0?25 to 1?0 under the condition that (FezNi) total concentration in slag are 25-27%. It is shown that the dependence of the liquidus temperature on the SiO2/CaO ratio is characterised by a minimum at 1325oC with SiO2/CaO of 2. It is determined that the increase in the slag liquidus temperature reaches the maximum (1330oC) with copper content in matte of 60%. It is demonstrated that copper in these slags is mainly present in a soluble form and that copper dissolved in a silicate melt is present both in association with oxygen (oxide solubility) and outside this association (metallic solubility). Based on the obtained results, several guiding, practical industrial conclusions are drawn for a successful operation of a new continuous process.Note: For copies of full papers please contact secretary@FLOGEN.COM
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