METHOD OF PRODUCTION OF POWDERED FLUXES Russian patent published in 2005 - IPC

FIELD: nonferrous metallurgy; methods of production of fluxes for melting and casting of magnesium and its alloys.

SUBSTANCE: the invention is pertaining to the field of nonferrous metallurgy, in particular, to the methods of production of fluxes for melting and casting of magnesium and its alloys. The method of production of powdered fluxes includes dehydration of the solid carnallite and flux-forming additives containing a water of crystallization. At that the dehydration is conducted in several stages in a multichamber furnace of a boiling layer. On the first stage the carnallite is treated with chimney gases, on the second stage the carnallite is treated with the chimney gases containing hydrogen chloride, and on third stage it is mixed with the flux-forming additives containing the water of crystallization and conduct the air separation. The chimney gases are produced due to feeding of chlorine-containing gases in the flare of the natural gas burning. Specific consumption of chlorine per 1 ton of a dehydrated carnallite makes 50-200 kg ensuring a raise of productivity of the flux production process and improvement of its quality.

EFFECT: the invention ensures a raise of productivity of the flux production process and improvement of its quality.

3 cl, 1 ex