OBTAINMENT OF TITANIUM DIOXIDE DURING INTEGRATED PROCESSING OF TITANIUM MAGNETITES FROM COASTAL AND SHELF DEPOSITS

摘要

Production of metallic titanium and pigment titanium dioxide has a strict requirements to raw material, in relation to content of TiO_2 and destructive admixtures (Fe_2O_3, Cr_2O_3, V_2O_3, etc.). Therefore the basic titanium raw materials are natural rutile concentrates, containing up to 90-96% of TiO_2. In the event of non-availability of natural rutile, there are used slags with high content of titanium (>85% TiO_2) from electric melting of the good-quality ilmenit concentrates, resources of which are limited. At the same time enormous resources of titanium magnetites are out of the balance of raw materials for titanium production, because for their concentrates (50-60% Fe and 5-15% TiO_2) there is no effective and economical industrial methods of processing with titanium production. In several countries organized production of "artificial rutile", which by its content is close to rutile concentrates and contains >90% of TiO_2 and admixtures, which further has to be removed.