Resumen

MAGNUSSEN, T.E.. Basic parameters in the operation and design of submerged arc furnaces, with particular reference to production of high-silicon alloys. J. S. Afr. Inst. Min. Metall. [online]. 2018, vol.118, n.6, pp.631-636. ISSN 2411-9717.  http://dx.doi.org/10.17159/2411-9717/2018/v118n6a11.

A review of the basic parameters in the operation of submerged arc furnaces is given. The importance of controlling the electrical operating parameters in accordance with the principles presented by Jens Westly in the 1970s is highlighted. Basically, the specific energy consumption for production of high-silicon alloys depends on the silicon recovery and the furnace efficiency. Silicon recovery depends mainly on the raw material quality, but also on furnace design. The furnace efficiency depends on the furnace operating resistance and the loss resistance, which are again related to the furnace design. A case from practical furnace operation is presented, showing how the furnace dimensioning and design affect the furnace efficiency and hence the specific energy consumption. Possibilities for further improvement of furnace efficiency and reduction of the loss resistance are discussed.

Palabras clave : submerged arc furnaces; high-silicon ferroalloys; electrical operating parameters; specific energy consumption; furnace efficiency factor; loss resistance.

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