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使用含有氯化盐的盐酸和纯盐酸浸出钛铁矿,试验发现,在盐酸浓度为18%、液固比4.2,135℃的条件下,含有氯化盐的盐酸在30 min内浸出所得人造金红石品位与盐酸直接浸出得到的人造金红石品位相近,均在83.77%左右;且在含盐盐酸浸出1 h左右,反应基本达到终点,所得人造金红石品位约为93.19%以上。同时测试了盐酸中氯化盐的浓度对所得人造金红石品位和粉化率影响以及浸出前盐酸活度,发现含盐盐酸活度与氯化盐浓度以及种类有关,提高氯化盐阳离子价态或者氯化盐浓度对盐酸活度都有大幅度提升,但不同种类相同价态阳离子对盐酸活度影响相同;含盐盐酸浸出所得人造金红石品位比盐酸直接浸出所得高,但粉化率也更为严重。通过扫描电镜(SEM)分析可以发现,反应过程中氯化氧钛水解生成大量针状金红石并且发生聚结,形成球状颗粒,即化学因素是造成金红石粉化的主要原因。
The use of hydrochloric acid containing hydrochloric salt and pure hydrochloric acid ilmenite leaching, the test found that the hydrochloric acid concentration of 18%, liquid-solid ratio of 4.2,135 ℃ conditions, hydrochloric acid containing chloride leaching within 30 min of the resulting artificial rutile The grade of artificial rutile obtained by direct leaching with hydrochloric acid was about 83.77%, and the reaction reached the end point after the hydrochloric acid leached for about 1 h. The obtained artificial rutile grade was about 93.19%. At the same time, the effect of chloride concentration in hydrochloric acid on the grade of artificial rutile and the pulverization rate and the activity of hydrochloric acid before leaching were tested. It was found that the activity of salt and hydrochloric acid was related to the concentration of chloride salt and the type of salt, The chloride concentration has a significant increase in the activity of hydrochloric acid, but different types of the same valence cations have the same effect on the hydrochloric acid activity. The artificial rutile leached with salt hydrochloric acid has a higher grade than the hydrochloric acid, but the pulverization rate is even more serious. Scanning electron microscopy (SEM) analysis shows that during the reaction, titanyl chloride hydrolyzes to produce a large amount of acicular rutile and agglomerates to form spherical particles. That is, chemical factors are the main reasons for the rupture of rutile.