金岭铁矿选矿厂尾矿絮凝沉降的研究

选择非离子型聚丙烯酰胺、明矾、糊精、高岭土、羧甲基纤维素、十二烷基苯磺酸钠、明胶为絮凝剂, 分别对山东金岭铁矿选矿厂尾矿进行了絮凝沉降试验, 遴选最佳絮凝剂及其最佳用量, 并进行了混合絮凝剂试验。结果表明, 非离子型聚丙烯酰胺能显著提高尾矿絮凝沉降速度, 效果最佳。考察了以非离子型聚酰烯酰胺为絮凝剂时, 尾矿酸碱度、矿浆温度对尾矿絮凝沉降的影响, 研究表明, 在中性或弱碱性状态下尾矿更容易絮凝沉降; 而矿浆温度对尾矿絮凝沉降影响极小。

Flocculants to Treat Tailings from Ore-dressing Plant of Jinling Iron Mine: Selection and Evaluation

The tailings from a thickener with the diameter of 50 meters in the ore-dressing plant of Jinling Iron Mine were used as test samples.To select the most favorable flocculant with an optimal dosage,flocculants non-ionic polyacrylamide,alum,dextrin,kaolin,carboxymethyl cellulose,sodium dodecylbenzene sulfonate and glutin were introduced to treat the tailings.Comparing with the solely used ones,the effect of combined usage of flocculants was as well investigated adopting the same method.Furthermore,the influences of pH value and pulp temperature on flocculating and settling were studied,yet the latter shows no obvious effect.The best experimental result can be obtained with non-ionic polyacrylamide as it can significantly promote the flocculating and settling,especially for a neutral or alkalescence pulp.