초록

A process for increasing the amount of titanium dioxide in a titaniferous slag includes the rapid preheating of the slag in gases substantially void of free oxygen.

대표청구항 ▼

An improved fluid bed process for producing a synthetic rutile from a titaniferous iron material containing reduced titanium oxide, the process including the selective chlorination of iron metal contained in the titaniferous iron material, said improvement comprising: (a) preheating the titaniferous

An improved fluid bed process for producing a synthetic rutile from a titaniferous iron material containing reduced titanium oxide, the process including the selective chlorination of iron metal contained in the titaniferous iron material, said improvement comprising: (a) preheating the titaniferous iron material, up to a temperature of at least 700°C., by contacting it with a heated gas substantially void of free oxygen; (b) feeding the preheated titaniferous iron material to a fluid bed at a temperature of at least 900°C. and maintaining the material in motion in the bed by a flow of gas containing nitrogen and chlorine; (c) removing solid synthetic rutile and gaseous chlorinated iron from the fluid bed.