(蘇州大學(xué) 沙鋼鋼鐵學(xué)院，蘇州 215021)
摘 要: 采用機(jī)械活化-鹽酸常壓浸出法對(duì)鈦鐵礦進(jìn)行了選擇性浸出，研究機(jī)械活化對(duì)鈦鐵礦的結(jié)構(gòu)、形貌、粒度及浸出效果的影響。結(jié)果表明，機(jī)械活化可以細(xì)化鈦鐵礦的粒徑，增加顆粒表面的粗糙度，從而增大其比表面積；機(jī)械活化可以破壞鈦鐵礦晶粒的完整性，并產(chǎn)生大量晶格缺陷，使晶格膨脹，上述作用均能強(qiáng)化鈦鐵礦浸出。最優(yōu)浸出條件為：鹽酸質(zhì)量分?jǐn)?shù)20%，反應(yīng)溫度100 ℃，酸礦比1.2，鈦鐵礦活化時(shí)間2 h。最優(yōu)條件下Ti和Fe的浸出率分別為1.07%和95.5%，最終Ti和Si富集在渣中，其他元素進(jìn)入浸出液。將上述得到的富鈦渣煅燒獲得了品位高于90%的人造金紅石。
關(guān)鍵字: 鈦鐵礦；機(jī)械活化；鹽酸；浸出
（School of Iron and Steel, Soochow University, Suzhou 215021, China）
Abstract:The elements of ilmenite were selectively leached by mechanical activation and hydrochloric acid leaching at atmospheric pressure, the effect of mechanical actuation on the microstructure, morphology, size and leaching results was studied. The results show that mechanical activation can refine the grain size and increase the surface roughness of ilmenite particles, which result in the increase of the specific surface area. The mechanical activation can also disrupt the integrity of ilmenite crystal grains, and induce the formation of a large number of lattice defects, which lead to the lattice expansion. All the above actions can strengthen the leaching of ilmenite. The optimal leaching conditions are as follows: hydrochloric acid of 20% in mass fraction, reaction temperature of 100 ℃, hydrochloric acid/ilmenite mass ratio of 1.2:1, and mechanical activation time of 2 h. Under the optimal conditions, the leaching ratios of Ti and Fe are 1.07% and 95.5%, respectively. As a result, Ti and Si are still in the slag, and the other elements are enriched in the lixivium. In addition, the synthetic rutile with the grade of over 90% is obtained by calcinating the above titanium-slag.
Key words: ilmenite; mechanical activation; hydrochloric acid; leaching
