Thermodynamic regularities of recovery of high-fine slags with angle

МРНТИ 53.01.91, 52.01.91                                                                №1 (2019г.)


Dosmukhamedov N.K., Zholdasbay E.E., Nurlan G.B.


In the conditions of melting copper concentrates for rich matte and / or for rough copper, the main task requiring solution is to organize the processing of a large yield of copper-rich slags containing, along with copper, such accompanying impurity metals as Pb, Zn, As, Sb and others. The study of the behavior of copper and its accompanying impurity metals under conditions of reductive depletion of high-copper slags is of fundamental importance from the point of view of choosing the optimal technological parameters and regimes ensuring an equilibrium distribution of metals between the smelting products. In this paper, based on a comparative analysis of known methods for depletion of slags widely used in practice, the choice of the method for depletion of high-copper slags is justified, and a thermodynamic evaluation of the possibility of their depletion is carried out. The thermodynamic analysis of the reactions of reduction of non-ferrous metals, Fe and As arsenic oxides with carbon and carbon monoxide in the temperature range 1273 … 1573 K. The Gibbs free energy and reaction rate constants of reactions of these reactions are calculated as a function of temperature. It is shown that the recovery of copper-rich slags with coal provides selective separation of metals from smelting products: copper – into a metal alloy; lead, zinc in sublime and arsenic – in the sublime and partly in the alloy.
Key words: slag processing, high-copper slag, Gibbs energy, depletion of slag, depletioncoal, copper, alloy, sublimes.


Комментарии закрыты.