Extended Arc Furnace
A new development in plasma furnace technology in which by relatively simple modifications a more or less conventional arc furnace can be made to produce a long stable plasma flame is described. A very promising application of this technique is in the steel melting as well as in direct reduction of fine iron ore, waste oxides, flotation concentrates, blast furnace dust, fly ash, mill scale, etc.
Treatment of ilmenite ore in a plasma jet reactor
Abstract Ground ilmenite ore was injected with hydrogen or ammonia into the arc- heated argon issuing from a plasma torch. Product collected either as consolidated or powder material on the walls of watercooled quench tubes and consisted of titanium-iron oxides of variable composition and metallic iron. Separation of titanium and Fe was most effective in the consolidated product where Ti contents ranged up to 49.5% (82.5% TiO2) and iron contents down to 12.1% (15.6% FeO). Unconsolidated material showed very little reaction of ilmenite but hematite contained in test samples was reduced. Resume Du minerai broye d'ilmenite a ete injecte avec de l'hydrogene ou de l'ammoniaque dans un arc produit par une torche a plasma a l'argon. Les produits recueillis, solides ou pulverulents, sur les parois refroidies a l'eau d'un tube de trempe etaient constitues d'oxydes de fer et de titane de diverses compositions et de fer metallique. La separation du fer et du titane etait plus efficace dans Ie produit solide pour leq...
Handbook of Concrete Engineering
Handbook of concrete engineering , Handbook of concrete engineering , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی