CHARGE FOR PRODUCTION OF NIOBIUM-BEARING MATERIAL AND A METHOD OF ITS PREPARATION Russian patent published in 2005 - IPC

FIELD: metallurgy; methods of preparation of charges for production of niobium-bearing material.

SUBSTANCE: the invention is dealt with production of niobium-bearing materials used for production of special steels. The technical result is an increased degree of transition of niobium into an alloy, decreased share of impurities in the alloy, decreased production costs. For this purpose the charge for production of a niobium-bearing material contains the raw material containing niobium pentaoxide, a nickel-bearing material, aluminum, calcium oxide, calcium fluoride and an exothermic oxidative additive. At that in the capacity of the exothermic oxidative additive it contains potassium chlorate with moisture of 2-12% at the following ratio in shares in respect to the total weight of the charge: niobium pentaoxide - 0.470-0.520, nickel - 0.190-0.270, aluminum - 0.180-0.200, calcium oxide - 0.030-0.040, calcium fluoride - 0.003-0.004, potassium chlorate with moisture of 2-12% - 0.043-0.049. At preparation of the charge after mixing of components it is exposed to compaction in the crucible up to the value of the plastic strength of 0.4-10.0 MPa.

EFFECT: the invention ensures an increased degree of niobium transition into an alloy, decreased share of impurities in the alloy, decreased production costs.

2 cl, 1 tbl, 3ex