| Titanium pigment, commonly known as titanium dioxide, has the most excellent and comprehensive performance in the modern white pigment. Artificial rutile titanium dioxide with good mechanical properties and thermal properties can act as an alternative to the scarce natural one.Rutile titanium dioxide was prepared by sulfate melting process in this research with titanium iron ore (South Africa) as raw material, which mixed with ammonium sulfateand focal potassium sulfate at the ratio of 1:6:0. 5.In this paper, microwave assisted leaching method was mainly used to improve the water bath leaching process. From the single factor test and orthogonal test, the optimum leaching conditions such as microwave power, microwave time, leaching temperature and the concentration of sulfuric acid were obtained to extract rutile titanium dioxide. Based on the chemical analysis, granularity analysis, X-ray diffraction analysis,SEM and EDAX analysis techniques, the physicochemical structure of the acid soluble ilmenite, the effect of microwave -sulfatemethod and its basic theories were systematized studied. The results show that the leaching yield up to 96.99% and the crystallinity of the as-leached rutile titanium dioxide up to 70.75% when the mineral sieving was 300 mesh,the microwave power was 4 kw, leaching time was 5h, the concentration of sulfuric acid was 30% under the temperature of 70?.Utilizing microwave assisted sulfate melting method to extract rutile titanium dioxide from imenite titanium is not only improves the leaching yield of titanium dioxide, but can solve the recycling problems of waste acid and waste gas. This study provides a new direction and can save its costfor the domestic production of rutile type titanium dioxide. |
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