| 摘要 |
<p>Process for beneficiating particulate titanium-bearing material containing iron oxides comprising: (a) contacting in a mechanical reduction kiln, particulate titanium-bearing material, particulate carbonaceous reducing material, and HCl or one or more materials which will produce HCl during step (a), or mixtures thereof, said contacting taking place in the substantial absence of titanium chlorination and while (i) the mechanical reduction kiln turns and cascades the material therein, (ii) a temperature of about 900-1100 degrees C is maintained, and (iii) reducing conditions are maintained, said particulate titanium bearing material having a mean diameter of less than about 40 microns, which diameter exists in the ore which is introduced into the kiln or is ground in the kiln to have such diameter, said step (a) causing iron oxide to be converted to metallic iron and causing liberation of the metallic iron from the titanium bearing material, said contacting continuing until the metallic iron produced in step (b) has a mean diameter of at least about 50 microns, (b) removing the resulting products from step (a) from the kiln, and (c) separating the metallic iron and titanium-bearing material from the resulting products from step (b).</p> |
