铝型材废渣制备镁铝尖晶石的研究

Preparation of Mg-Al Spinel Material from Waste Aluminum Slag

以铝型材碱蚀渣为主要原料,采用半干法成型,经烧结制备镁铝尖晶石。实验结果表明:Mg O:Al_2O_3摩尔比为1:1,烧结温度1500℃保温1 h时,制备出的镁铝尖晶石含量较高;烧结温度的提高,对形成镁铝尖晶石有利;添加烧结助剂Ti O_2和H_3BO_3,能提高镁铝尖晶石试样密度,两者比较,Ti O_2提高镁铝尖晶石密度优于H_3BO_3,Ti O_2加入量4%为宜。

Mg-Al spinel samples were prepared by semi-dry pressing and sintering, using waste aluminum slag as the main source material. Experiment results showed that when the molar ratio of MgO ： Al2O3 was 1 ： 1, the samples obtained after sintering at 1500 °C for 1 hour had high content of Mg-Al spinel; the increase of the sintering temperature was benefcial to Mg-Al spinel formation; the addition of TiO2 or H3BO3 could increase the density of the as-prepared Mg-Al spinel while the density of the specimens doped with TiO2 was higher than those doped with H BO , and the optimal TiO addition was 4%.