METHOD FOR PRODUCTION OF ALUMINIUM-ZIRCONIUM LIGATURE (VERSIONS) Russian patent published in 2013 - IPC C22C35/00 C22C1/02 

FIELD: metallurgy.

SUBSTANCE: for production of aluminium-zirconium ligature, aluminothermal recovery of zirconium is carried out from its compounds in the environment of melted metal halogenides. Zirconium is recovered from its fluoride or oxide, and also from fluozirconate or oxifluozirconate of alkaline or alkaline-earth metal in presence of potassium chloride, sodium fluoride and aluminium fluoride, introduced into the melt or formed in the process of aluminothermy. The temperature of the process amounts to 850-1150°C. Recovery is carried out under the layer of chloride cover flux, containing potassium and sodium chlorides at the following ratio of components, in the mixture, wt %: potassium chloride 42-45, sodium chloride - balance. The melt is soaked for 15-30 minutes, and bars are poured. The invention makes it possible to produce bars of ligature with homogeneous structure with dimensions of intermetallides of up to 15-30 mcm, at the same time non-return losses of zirconium are reduced down to 7-9%, environmental characteristics of the process are improved.

EFFECT: aluminium alloys produced using proposed ligature are characterised by high quality with reduced amount of ligature.

12 cl, 15 ex, 4 tbl