JSC EVRAZ NTMK (Nizhny Tagil, Russia):

V. V. Temnikov, Head of the Bureau of Iron Ore and Bulk Materials of the Technical Department, e-mail: Vladislav.Temnikov@evraz.com
A. A. Forshev, Head of the Sinter-Coke-Blast Furnace Dept., Deputy Head of Technical Management Administration, e-mail: Andrey.Forshev@evraz.com
E. G. Kalimulina, Chief Specialist of the Bureau of Iron Ore and Bulk Materials of the Technical Dept., e-mail: Elena.Kalimulina@evraz.com
L. P. Babkin, Leading Technological Engineer of the Bureau of Blast Furnace Technical Management, e-mail: Leonid.Babkin@evraz.com

Annually, about 20,000 tons of slag from the desulphurization unit of the converter shop are formed at the enterprises of JSC EVRAZ NTMK. Desulfurization slag is a valuable iron and vanadiumcontaining material (Fe content total 50–65%, V2O5 content up to 6%) for the production of cast iron. A negative factor is the presence in the desulfurization slag of an increased amount of sulfur — up to 2%. Balance calculations showed that when using the entire volume of desulfurization slag in one blast furnace, the sulfur content in cast iron will increase slightly — by 0.001%. In this regard, it was decided to use desulfurization slag in blast-furnace smelting with recycling of iron and vanadium with substitution of iron ore raw materials in the blast furnace charge and obtaining additional volumes of commercial vanadium in further processing. During the pilot tests, positive results were achieved, a patent for the invention was obtained, and at the present time, desulfurization slag is constantly used in blast furnace production. At the same time, the load on the environment is reduced — the accumulation of desulfurization slag in warehouses is excluded, since desulfurization slag contains active lime, it retained its desulfurizing abilities when used in blast-furnace smelting and did not increase the sulfur content in cast iron.

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