TITANIUM SLAG PROCESSING Russian patent published in 2014 - IPC C22B34/12 C22B1/16 C22B3/08 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises mixing of initial titanium-bearing slag with soda ash, mix sintering and leaching of produced cake, first, in water for production of iron-titanium-bearing precipitate and, then, in muriate for production of titanium-bearing precipitate. Then, pulp is filtered to separate the precipitate to get titanium dioxide concentrate. note here that initial slag sintering with soda ash occurs at 900°C and Na₂CO₃:slag ratio equal to (0.98-1.15):1. Cake sintering in water is conducted to transfer sodium silicate to solution while titanium dioxide concentrate is made by calcination of precipitate resulted from hydrochloride-acid treatment. Note here that said initial titanium slag represents that of reducing fusion of ilmenite.

EFFECT: simplified process, higher pulp filtration rate.

2 cl, 1 tbl