AGGREGATE FOR REMOVAL OF ARSENIC FROM IRON-CARBON MELT UNDER VACUUM Russian patent published in 2011 - IPC C21C7/10 

FIELD: metallurgy.

SUBSTANCE: aggregate consists of vacuum-chamber 1 with internal reservoir 2 made of lining material converging downward and entering nose of iron transporting ladle 3, and of receiving ladle 3 mounted on cover of vacuum chamber 1. In a bottom of ladle 4 there is installed tuyere 5 for metal tapping with 4-5 nozzles for increase of angle of backing-off of liquid metal sputtered in vacuum. A recess for iron vacuum insertion 6 having a shape of a truncated cone is made over tuyere 5. Vacuum chamber 1 is connected with a buffer reservoir, volume of which 15-20 times exceeds volume of vacuum chamber 1. Tuyeres for supply of oxidant are arranged in restricting section of vacuum chamber 1. An upper part of vacuum chamber 1 is connected with a reservoir for sedimentation of arsenic vapours.

EFFECT: maintaining stable pressure in vacuum chamber, increased amount of arsenic removed from melt.

2 cl, 1 dwg, 2 tbl