(1. 矿冶科技集团有限公司，北京 102628；
2. 国家金属矿绿色开采国际联合研究中心，北京 102628；
3. 中南大学 资源与安全工程学院，长沙 410083)
摘 要: 全尾砂絮凝沉降技术是矿山充填工艺的核心环节。为研究全尾砂静态絮凝沉降特性规律，以进料质量分数、絮凝剂单耗为影响因素，以固体通量为评价指标，采用混合均匀试验方案，开展全尾砂静态絮凝沉降试验，建立全尾砂絮凝沉降固体通量模型，获得最优匹配参数。在此基础上，开展全尾砂动态絮凝沉降试验，研究剪切作用和给料速率对底流质量分数的影响。结果表明：固体通量影响因素排序为全尾砂进料质量分数＞絮凝剂单耗；预测进料质量分数为10.6%，絮凝剂单耗为28.5 g/t时，固体通量达到最大值，为1.498 t/(h·m2)，与实测数据误差仅为1.5%；动态絮凝沉降可大幅提高底流质量分数，最大提高幅度为16.4%，并与进料速度呈现负相关关系。
关键字: 全尾砂；絮凝沉降；固体通量；进料浓度；絮凝剂单耗；参数优化；混合均匀设计
（1. BGRIMM Technology Group, Beijing 102628, China;
2. National Centre for International Research on Green Metal Mining, Beijing 102628, China;
3. School of Resources & Safety Engineering, Central South University, Changsha 410083, China）
Abstract:The unclassified tailings flocculation sedimentation technology is the core link of the mine backfilling. In order to study the characteristics of the static flocculation sedimentation of the unclassified tailings, the static flocculation sedimentation tests were conducted. And the solid flux model of the unclassified tailings flocculation sedimentation and the optimal matching parameters were obtained by adopting the mixed uniform test scheme, in which the slurry concentration and the unit consumption of the flocculant were used as the influencing factors, and the solid flux as the evaluation criteria. On this basis, the dynamic flocculation sedimentation test of the unclassified tailings was carried out to study the effect of shearing and feeding rate on the underflow concentration. The results show that the sequence of influencing factors of solid flux is feed concentration > flocculant unit consumption; When the feed concentration is 10.6% and the unit consumption of flocculant is 28.5 g/t, the solid flux reaches the maximum value of 1.498 t/(h·m2), and the measurement error of the measured data is only 1.5%; The dynamic flocculation sedimentation can increase the underflow concentration by 16.4% and has a negative correlation with the feed rate.
Key words: unclassified tailings; flocculation sedimentation; solid flux; slurry concentration; unit consumption of flocculants; parameters optimization; mixed uniform design
