对苯二甲酸钠对赤泥沉降过程的影响

研究了铝土矿中的有机物对苯二甲酸钠对赤泥沉降性能的影响,考察了对苯二甲酸钠不同浓度条件下对赤泥沉降速度、溢流浮游物含量和底流压缩液固比的影响,同时考察了加入絮凝剂消除对苯二甲酸钠负面作用的条件.结果表明,对苯二甲酸钠和絮凝剂的浓度是影响赤泥沉降速度、溢流浮游物含量和底流压缩液固比的重要因素.对苯二甲酸钠对赤泥沉降速度的不利影响可被4种絮凝剂中的任何一种消除,其中A-600的作用最好;当对苯二甲酸钠质量浓度低于3.58 g/L时,4种絮凝剂可消除其对赤泥压缩比的影响.

Effects of Para-Phthalic Sodium on Sedimentation of Red Mud

The effects of para-phthalic sodium, an organic compound in bauxite, on the sedimentation of red mud was studied, as well as the effects of different concentration of the compound on sedimenting rate, content of overflowing plankton and the ratio of liquid to solid compressed by bottom flow. One of some flocculants was added to eliminate the adverse effect of para-phthalic sodium, and the conditions available to add the flocculant were also studied. The results showed that the concentrations of para-phthalic sodium and flocculant both have important effects on the sedimenting rate of red mud, content of overflowing plankton and the ratio of liquid to solid compressed by bottom flow. Among the 4 flocculants the A-600 is the best one to eliminate the adverse effect of para-phthalic sodium on the sedimenting rate of red mud. If the concentration of para-phthalic sodium is lower than 3.58 g/L, any of the 4 flocculants can eliminate the adverse effect on the compressed liquid/solid ratio of red mud.