所有用来加速赤泥悬浮固体颗粒沉降的聚合物絮凝剂，都会使赤泥底流场应力增加，从而使其流动性变差。在某一固体颗粒浓度下，场应力会随聚合物添加剂量的增加而增加，但是这也取决于所采用的聚合物种类。对比不同相对分子质量絮凝剂在赤泥中的作用效果，得出结论，当聚合物絮凝剂相对分子质量大于某一最小值时，赤泥的流变学性质不再随相对分子质量增加而发生变化。因此，对于可能产生的最低场应力，絮凝剂相对分子质量越大越好，这样就可以实现在要求的沉降速率范围内使用最低剂量絮凝剂的生产目标。
Any polymeric flocculant used to accelerate the settlement of suspended mud solids can increase the stress for underflow mud field,which will make the the fluidity of the red mud become badly.Yield stress (at a given sol-ids concentration)always increases with polymer dosage,but depends somewhat on the type of polymer used.The effects of molecular weight on the rheology of red mud have been emphasized.It can be concluded that when the mo-lecular weight of polymeric flocculant is over quite a wide range,the rheology of the red mud does not depend on molecular weight.Thus,for the lowest possible yield stress,molecular weight should be as high as possible,which will make the dosage of flocculant lowest for the required settlement rate.
参考文献
| [1] | 何宁;李寅;陈坚.新型生物絮凝剂REA-11的代谢模型建立与代谢网络分析[J].化工学报,2005(4):681-688. |
| [2] | 陈锋;王连嵩;毕诗文;谢志辉;贾志军.一种带有苯环结构的氧肟酸类赤泥絮凝剂的合成及应用[J].中国有色金属学报,2007(3):498-503. |
| [3] | 卢红梅;钟宏.赤泥沉降用新型高分子絮凝剂的结构表征及分析[J].矿冶工程,2003(4):35-38. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%