PROCEDURE FOR MELTING REFINED FERRO-CHROMIUM Russian patent published in 2011 - IPC C22C33/04 

FIELD: metallurgy.

SUBSTANCE: according to procedure at products of melt teeming part of boron-containing slag is left in bath of furnace. Siliceous reducer and ore-lime part of charge is loaded on part of boron-containing slag left in a bath of the furnace. 10-20 minutes prior to products of melt teeming mixture of material containing boron oxide with siliceous reducer and lime is charged into slag melt under electrodes. Also, material containing boron oxide in terms of B₂O₃ is introduced at amount of 0.20-0.30% of weight of slag melt.

EFFECT: reduced losses of chromium with slag, improved performance characteristics and production of slag resistant to silicate decomposition.

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