A. A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

V. G. Leontev, Senior Researcher, e-mail: leontiev_v_g@mail.ru
V. A. Bryukvin, Head of Laboratory

The mechanism and kinetics of the slag melts recovery by different ways are concidered along with the accelerating possibility of the slag melts recovery through the melting in the slag layer foaming. Sometimes, the foaming occurs in the traditional processes. It is usually considered as the technology breach, which leads to the failing of the furnace unit. That’s why, holding the process of intensive reduction of slag in the foaming regime requires the positive control of the level of foamed bath. The foaming is achieved by the application of reducing agent into the layer of metallic melt on the basis of iron, under a slag layer. The slag melt foaming is obtained due to the formation of gaseous reaction products of iron oxide reduction by the carbon, dissolved in iron, on the slag-metal border. There were given the experimental data of the reduction rate depth of foamed layer, depending on the flow rate of re ducing agent in the metal layer. A linear relationship was stated between the reduction rate and the increasing magnitude of the foamed layer height. A high-intensity pyrometallurgical process of iron and heavy non-ferrous metals recovery from the iron-silicate-calcium slags with a minimum amount of waste gases can be organized due to the peculiarities of heat and mass transfer processes during the oxide melts foaming.

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