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| Microwave Heating Leaching to Extract Titanium from Ilmenite |
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Received:June 23, 2016
Revised:July 25, 2016
Accepted:July 26, 2016
Published Online:September 20, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.10.006 |
| KeyWord:ilmenite; microwave; leaching rate; titanium dioxide |
| Author | Institution |
| HAO Xiaohua |
海南大学海口市固废物资源利用及环境保护重点实验室 |
| XU Shuying |
海南大学 海口市固废物资源利用及环境保护重点实验室 |
| ZHANG Yucang |
海南大学 海口市固废物资源利用及环境保护重点实验室 |
| CHEN Qiwen |
海南大学 海口市固废物资源利用及环境保护重点实验室 |
| WANG ya |
海南大学 海口市固废物资源利用及环境保护重点实验室 |
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| Abstract: |
| Titanium in ilmenite was transformed to titanyl sulfate soluble in dilute sulfuric acid by melting reaction applying ilmenite and ammonium sulfate as main raw materials. Ammonium sulfate can be generated by ammonia gas from calcination and spent acid hydrolysis from hydrolysis. In this article, microwave leaching was substituted to water leaching. Effects of microwave power, microwave time, leaching temperature, and concentration of sulfuric acid on titanium leaching rate were investigated by single factor test and orthogonal test respectively. The results show that titanium leaching rate is 96.99% and rutile of final products titanium dioxide crystalline is 70.75% under the optimum conditions include particle size of -0.053 mm, microwave power of 4 kW, microwave time of 5 h, concentration of sulfuric acid of 30%, and leaching temperature of 70 ℃. |
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