(1. 昆明理工大学 国土资源工程学院，昆明 650093；
2. 玉溪矿业有限公司，玉溪 651300)
摘 要: 针对立式砂仓传统作业模式下存在的问题，提出采用连续放砂作业方式，改善立式砂仓的核心工作指标。根据尾砂沉降试验结果以及固体通量定义，以最大固体通量对应的料浆浓度设计立式砂仓的入料浓度；物料平衡分析中，考虑溢流固体含量对立式砂仓处理能力的影响，确定了设备最大处理能力及对应的装砂高度；根据活化造浆基本原理，提出了高压活化介质临界工作压力及工作流量的计算方法。工业试验结果表明：在进料体积浓度(体积分数)为13.08%、流量为300 m3/h、装砂高度为5 m以及立式砂仓实际最大处理能力为91 t/h条件下，以压力111692 Pa、流量15 m3/h的高压水进行活化造浆，控制底流流量70 m3/h，可实现立式砂仓连续放砂。放砂质量浓度可达70%，试验效果良好。
关键字: 立式砂仓；连续放砂；物料平衡；活化；自流
（1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Yuxi Mining Corporation Limited, Yuxi 651300, China）
Abstract:Aimed at the problems existing in the traditional work mode of vertical sand silo, the consecutive discharge tailings was presented in this paper to improve the vertical sand silo’s core working index. According to the tailings'''' settlement test result and solid flux definition, the concentration of feeding slurry was designed which can achieve the largest solid flux. The influence of solid content of overflow on the processing capacity of vertical sand silo was considered in material balance analysis, the maximum capacity and the corresponding pack sand height were determined. Based on the basic principle of activated pulping, the computing methods of critical state working pressure and flow of high pressure activated medium were put forwarded. The industrial test result shows that, under the conditions of that the feeding volume concentration is 13.08%, the flow is 300 m3/h , the sand loading height is 5 m, and the actual maximum processing capacity of vertical sand silo is 91 t/h, using the high pressure water with pressure of 111692 Pa and the flow rate of 15 m3/h for activated pulping, controlling the bottom flow rate at 70 m3/h, the continuous sand discharge of the vertical sand silo can come true. The mass concentration of tailings discharge can reach 70%, the test result is great.
Key words: vertical sand silo; consecutive discharge tailings; mass balance; activation; free flow
