Abstract:
A low density, porous compact of prepared mix containing silica fume, finely-divided carbonaceous reducing agent such as petroleum coke or coal, optionally iron and a binder.
Abstract:
Vanadium-carbon materials for use as additions to steel have been produced by the vacuum furnacing of a mixture of vanadium oxide and carbon. To lower the sulfur content of such material, which derives essentially from the sulfur content of the carbon in the mixture, a relatively small quantity of silicon, silica or tin is included in the mixture prior to vacuum furnacing.
Abstract:
A vanadium-silicon alloy having a low carbon and oxygen content is produced by vacuum furnacing a mixture of V.sub.2 O.sub.3, carbon and silicon metal in at least the stoichiometric amounts necessary to reduce V.sub.2 O.sub.3 and form V.sub.2 Si while preventing vanadium from combining with carbon and oxygen.
Abstract translation:通过以至少减少V 2 O 3所需的化学计量的量来真空加热V 2 O 3,碳和硅金属的混合物,形成V2Si,同时防止钒与碳和氧结合,来生产具有低碳和氧含量的钒 - 硅合金。
Abstract:
A low-carbon vanadium nitride is prepared in a furnace at an elevated temperature of about 1400.degree. C. under nitrogen atmosphere from a feed material containing a mixture of vanadium oxynitride and carbon. The vanadium oxynitride is prepared by the partial ammonia reduction of a vanadium-containing oxidic compound such as ammonium metavanadate (NH.sub.4 VO.sub.3) or oxides of vanadium such as V.sub.2 O.sub.3 and V.sub.2 O.sub.5.
Abstract:
A low density, porous compact of prepared mix containing silica fume, finely-divided carbonaceous reducing agent such as petroleum coke or coal, optionally iron and a binder.