中低品位铝土矿两段烧结法中一段烧结工艺研究

Research on One-Stage Sintering in Two-Stage Sintering Process for Bauxite of Middle-Low Quality

用中低品位铝土矿(A/S为5左右)作为原料,通过纯碱烧结法考查碱比、烧结温度、烧结时间对氧化铝溶出率的影响。实验结果表明:碱比为1.2、烧结温度1100℃、烧结时间40min的烧结条件为一段烧结最佳条件。同时还考查了溶出条件对脱硅的影响作用。

In handling the bauxite of middlelow quality (A/S=5±), this paper studies the effect of alkaliratio, sinteringtemperature and sinteringtime on the yield of Al2O3. The result shows that it is the optimum condition for onestage sintering when alkaliratio is 1.2, sintering temperature 1100℃ and sinteringtime 40 min. The effect of lixiviating conditions on separating out SiO2 is also studied. 