不同絮凝剂对铁尾矿的絮凝效果试验研究

发布时间：2018-06-16 01:20

  本文选题：铁尾矿 + 絮凝剂　； 参考：《应用基础与工程科学学报》2017年04期

【摘要】：絮凝可以使尾矿浆浓缩,减少排入尾矿库的水量,利于尾矿库稳定.为探究不同絮凝剂对铁尾矿的絮凝效果,以阜新阿哈来铁尾矿和同乃铁尾矿为对象开展试验研究.测定两种铁尾矿的基本性质,分别检测阴离子型聚丙烯酰胺、非离子型聚丙烯酰胺、羧甲基纤维素钠和消石灰对两种铁尾矿的絮凝效果.结果表明:同乃铁尾矿颗粒较阿哈来铁尾矿细得多,两者均为粉土质砂,级配均不良,比重均比一般砂粒土大.两种铁尾矿浆均接近中性,浓度均为10%左右.阴离子型聚丙烯酰胺较其它絮凝剂产生澄清层快,是阿哈来铁尾矿和同乃铁尾矿在给定尾矿浆浓度条件下的最佳絮凝剂,最佳用量分别为14g/t和22g/t.两种铁尾矿在阴离子型聚丙烯酰胺最佳用量条件下,pH=7时的絮凝效果最佳,弱碱性条件稍次之,酸性条件最差;铁尾矿的沉降速度随温度升高稍有加快,在15~20℃左右达最大值,温度变化对两种铁尾矿的絮凝效果影响均不大.
[Abstract]:Flocculation can make the tailings concentrate and reduce the amount of water discharged into the tailings reservoir, which is beneficial to the stability of the tailings reservoir. In order to study the flocculation effect of different flocculants on iron tailings, the experimental study was carried out on Ahalai iron tailings and Tongnai iron tailings in Fuxin. The basic properties of two kinds of iron tailings were determined, and the flocculation effects of anionic polyacrylamide, non-ionic polyacrylamide, sodium carboxymethyl cellulose and quicklime on the flocculation of two kinds of iron tailings were examined respectively. The results show that the grain of Tongnai iron tailings is much finer than that of Ahalay iron tailings, both of them are silty sand, the gradation is not good, and the specific gravity is larger than that of the general sand grained soil. The two kinds of iron tailings are close to neutral, and the concentration is about 10%. The anionic polyacrylamide is the best flocculant for Ahalay iron tailings and Tongnai iron tailings under the given concentration of tailings, and the best dosage is 14g/t and 22g / t, respectively. The flocculation effect of the two kinds of iron tailings is the best at pH = 7 at the optimum dosage of anionic polyacrylamide, followed by the weak alkaline condition, and the acid condition is the worst, and the settling velocity of the iron tailings increases slightly with the increase of temperature, and reaches the maximum at 15 ~ 20 鈩，

本文编号：2024556