由于取材方便、操作简单和无二次污染等优点,重砂加载混凝沉淀被广泛应用于高悬浮物矿井水的高效处理。然而,矿井水中多变的悬浮物种类对重砂加载混凝沉淀效果的影响则很少有人关注,影响机制也不清晰。为此,选用石英重砂加载混凝处理高悬浮矿井水为研究对象,分析矿井水中悬浮物的种类(煤粉、岩粉和煤岩粉混合物等)对石英重砂加载混凝处理高悬浮物矿井水效率的影响。分析结果表明:石英重砂的投加对混凝沉淀处理高悬浮岩粉矿井水效率的影响可忽略,但适量的重砂投加有助于提升混凝沉淀的效率和速率。虽然石英重砂投加量越多,混凝沉淀的效率和速率升高的越快,但石英重砂的投加并不能高效地混凝沉淀处理高悬浮煤粉矿井水。随着矿井水中煤粉含量的降低,岩粉含量的增加,运行过程中上清液的浊度逐渐降低,石英重砂加载混凝处理的效率和速率逐渐升高。该研究成果为保障重砂加载混凝处理高悬浮矿井水的效率,缓解我国西部矿区水资源短缺的矛盾具有重要的现实意义。

As convenient and environment materials, heavy sand loaded coagulation precipitation is widely used in efficient and rapid treatment of mine drainage with high suspended solids. However, few systematic studies on the effect of heavy sand characteristics on coagulation treatment of high suspended mine drainage. Therefore, the typical high suspended mine water was selected to analyze the effect of coal particles, rock particles and coal- rock mixture on the efficiency of high suspended matter mine water treated by loading coagulation with heavy sand. The results showed that the effect on high suspended rock mine water treated by loading coagulation with heavy sand were negligible, however, the appropriate amount addition of heavy sand was helpful to improve the efficiency and rate of coagulation and precipitation. The more heavy sand added, the faster the efficiency and rate of coagulation and precipitation increased,nonetheless, the effectively of high suspended coal mine water treated by loading coagulation with heavy sand were weaker. With the decrease of coal content and the increase of rock content in mine water, the efficiency and rate of loading coagulation treatment with heavy sand would increase correspondingly. These results can effectively ensure the efficiency of high suspended matter mine water treated by loading coagulation with heavy sand and alleviate the contradiction of water shortage in western China.