METHOD OF PRODUCING COMPLEX FOUNDRY ALLOYS FROM CONVERTER VANADIUM SLAG Russian patent published in 2007 - IPC C22C35/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to processing converter vanadium slag into iron and complex foundry alloy. Reduction of vanadium, silicon, manganese, titanium, chromium, and iron from oxides of converter vanadium slag is conducted on supports formed in two smelting assemblies. In the first smelting assembly, iron and a portion of vanadium are silicon-reduced on iron-containing support, with which the metals are smelted together. Once major part of iron from a batch of converter vanadium slag is reduced, this portion is tapped out of first smelting assembly. Iron-depleted converter vanadium slag is then transferred to the second smelting assembly, wherein, first on support of titanium-containing complex foundry alloy, vanadium, silicon, manganese, chromium, and iron are titanium-reduced from their oxides contained in iron-depleted converter vanadium slag at support temperature 1700° C and specified calcium oxide supply to form titanium-free complex foundry alloy and slag containing titanium and calcium oxides. Titanium-free complex foundry alloy is tapped out of smelting assembly in amount up to 70% and titanium is aluminum-reduced from slag using, as support, not tapped rest of foundry alloy to form complex titanium-containing foundry alloy containing metals from iron-depleted portion of converter vanadium slag. Final slag is tapped out of second smelting assembly.

EFFECT: increased vanadium content in final produce, reduced power consumption during converter vanadium slag processing, increased content of titanium in foundry alloy to 70%, and avoided emission of gas, which would require additionally treatment equipment.

10 cl