立式砂仓尾砂体积分数随砂仓高度变化规律研究  

Research on the Change Law of Volume Fraction of Tailings with Tailings Silo Height in Vertical Tailings Silo

作　　者：任伟成 乔登攀[3] 周志伟 REN Weicheng;QIAO Dengpan;ZHOU Zhiwei(School of Mining Engineering, North China University of Science and Technology, Tangshan 063009, Hebei, China;Key Laboratory of Mining and Safety Technology of Hebei Province, North China University of Science and Technology, Tangshan 063009,Hebei, China;Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan , China;Anshan Chentaigou Iron Mining, China Minmetals Corporation ,Anshan 114044,Liaoning, China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063009 [2]华北理工大学河北省矿业开发与安全技术重点实验室,河北唐山063009 [3]昆明理工大学国土资源与工程学院,云南昆明650093 [4]鞍山五矿陈台沟矿业有限公司,辽宁鞍山144044

出　　处：《黄金科学技术》2018年第1期64-73,共10页Gold Science and Technology

基　　金：国家自然科学基金项目"地下矿山废石-全尾砂高浓度管输充填应用基础研究"(编号:51164016)资助

摘　　要：针对现有放砂系统存在的砂浓度波动大、实际放砂浓度较低且不稳定等问题,提出了一种新的有别于立式砂仓传统放砂工作模式的放砂模型,即通过控制给料流量和浓度、放砂流量及尾砂堆积面高度3个条件达到给料、溢流、放砂同时进行的连续放砂模型,之后运用流体力学软件对连续放砂模型进行模拟分析。结果表明:当物料达到进出平衡时,不同尾砂堆积面高度对应的底流放砂浓度不同;砂浆中尾砂体积分数随砂仓高度呈规律性变化,由此提出预测模型。在云南玉溪大红山铜矿进行了连续放砂工业试验,结果表明工业试验效果良好,证实了连续放砂的可行性。There were many problems in the existing ore drawing system, such as large sand concentration fluctuation, low concentration of actual ore drawing and instability, so a new discharge sand model was proposed , which was different from tranditional discharge sand working mode of vertical sand silo.That was, by controlling three conditions of feed flow and concentration, discharge flow and height of tailings stacking surface, to carry out feed, overflow and discharge sand at the same time. And fluent software was used to simulate continuous discharge tailings model. The results showed that, different height of the accumulation corresponding to discharge tailin^s concentration at the bottom of the silo is different can be obtained as feeding, overflow and discharging keeping stability and achieving a dynamic balance. The relationship of tailings volume fraction changes With regularly silo height.Prediction model of the volume fractiofl of tailings changes with silo height is proposed. Industrial test of continuous tailings discharge systems is carried out in Dahongshan copper mine Yuxi Yunnan.The results showed that the industrial test displays successfully which validate the efficacy of the continuous tailings discharge model.

关 键 词：尾砂 动态沉降 立式砂仓 连续放砂 数值模拟 给料 底流 堆积高度 

分 类 号：TD325[矿业工程—矿井建设]