METHOD OF PREPARING PHOSPHORUS-CONTAINING ALLOY Russian patent published in 2002 - IPC

FIELD: nonferrous metallurgy. SUBSTANCE: preparation of phosphorus-containing copper- and nickel-based alloys involves formation of blend in the form of mixture of powders of oxygen-containing phosphorus compound, reduction reagent, alloy-forming metal and its oxide, local heating of blend to its inflammation temperature accompanied by melting of alloy-forming metal, reduction reagent- mediated reduction of phosphorus from its oxygen-containing compound and dissolution of phosphorus in alloy-forming metal, and refiner-assisted refining of alloy to remove impurities. According to invention, refiner is formed from mixture of powders of oxygen-containing phosphorus compound, reduction reagent, alloy-forming metal oxide in amounts proportional to quantity of impurities to be removed, which have higher oxygen affinity than phosphorus and alloy- forming metal. Refiner is placed under blend layer. Reduction reagent and alloy-forming metal oxide of the refiner are taken in stoichiometric proportions and ratio of summary amount of reduction reagent and alloy-forming metal oxide to amount of oxygen-containing phosphorus compound is fixed within the range of 0.8 to 1.3. Alloy-forming metal is copper or nickel, reduction reagent is apatite or phosphorite concentrate, and oxygen-containing phosphorus compound for refiner is taken in amounts at least threefold superior to stoichiometric amount required to remove aluminum, calcium, and silicon impurities. Concentration of impurities in end product does not exceed 0.17%. EFFECT: achieved 95% yield of conditioned product. 6 cl, 11 ex