立式砂仓尾砂体积分数随砂仓高度变化规律研究

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。

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

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 tailings 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 fraction 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.