Study On Produce Of TiCl₄ From Modified Titanium Bearing Blast Furnace Iron Slag By Low-temperature Chlorination Method

In China about half of Titanium dioxide resources lose in smelting iron slag in the form of Perovskite, so those slag are not simply used to make architectural materials such as cement, concreat. The titanium containing in smelting iron slag changed the physical chemistry property of slag consumedly. Many metallurgist make titanium alloy,TiCl4, Titanium dioxide and so on by the use of containing the titanium smelting iron slag.Whereas due to the distributing of titanium containing in slag is dispersive, various minerals contain titanium component, the phenomenon of mutual continuous growth of minerals is relatively familiar, which cause the titanium containing in slag not easy to be chloridized.In allusion to those problems mentioned above, we adopt that chlorine entered from the bottom of reactor make materiel fluidization in reactor, powdery material chloridize under the condition of adding charcoal and low-temperature (chloridized temperature is commonly at 700 C-850 C) in the process of the powdery material wafted by airflow, the titanium almost in the form of TiCl4 gas gets enrichment in absorbing, improving technical parameters is in order to solve the felting problem and play down cost in the process of chlorination.In my experiment containing the titanium smelting iron slag chloridized under the condition of adding charcoal and low-temperature, the influence of calcium and magnesium on chloridized Perovskite in slag after importing Phosphorylation is discussed:1. From experiments we can find that the chloridizing rate of modifying chloridizing reaction of containing the titanium smelting iron slag is maximal in the reactive temperature of 800℃, the chloridizing time of 2h,the nitrogen capacity of flow of 120ml/min,the chlorine capacity of flow of 40ml/min and excessive charcoal quantity of 20 percent.2. The influence of phosphate on the transform of mineral phase containing in slag is quite remarkable:volume point of non-titanium phase increases, Perovskite and titanium pyroxene phase decreases with increasing phosphate, and the increase of calcium phosphate is good to chlorination of titanic in slag.3. In the case of dynamic chlorination, Perovskite and titanium pyroxene in slag basically disappear, and create non-titanium mineral and compound mineral,the titanium component dispersed in different mineral phase is chloridized selectively into TiCl4 phase, which accelerate the chloridizing reaction more.