面向膏体充填尾砂浓密的絮团结构研究进展综述

膏体充填的技术难题之一是如何在尾砂浓密环节制备出浓度稳定、适宜的底流,从而满足后续工艺环节的需要,以期为矿山安全高效生产提供技术保障.但实际工程中尾砂浓密的底流浓度常常不稳定,基于国内外尾砂浓密领域的最新研究进展发现,底流浓度除了受浓密工艺的宏观因素影响外,根本原因取决于浓密脱水过程中的絮团微细观结构.为此通过综述国内...

Summary of Research Progress on Floc Structure of Tailings Thickening for Paste Backfill

One of the technical problems of paste backfill is how to prepare a stable and suitable underflow in the process of tailings thickening,so as to meet the needs of subsequent process links and provide technical support for safe and efficient production in mines.However,in actual engineering,the underflow concentration of the tailings thickening is often unstable.Based on the latest research progress in the field of tailings thickening,it is found that the underflow concentration is affected by the macroscopic factors of the thickening process,and the root cause depends on the microscopic view of the floc structure during the thick dehydration process.Therefore,by reviewing domestic and foreign research progress of tailings thickening in tailings flocculation,tailings floc structure change,floc water content change,bed pore channel development and evolution,and compaction zone dewatering,systematic analysis of the mechanism of the external conditions on the change of the floc structure in the dense,the cause of the change of the floc water content by the structure of the floc,the influence of the floc water and the pore channels in the compaction zone on the underflow concentration,it is concluded that the flocculation conditions determine the initial form of the floc structure,the fluid shear force in the settlement zone,the pressure of the tailings bed in the compaction zone and the shearing effect of the rake change the structure of floc,the water content of the floc will change with the change of floc structure,it changes and is discharged through the pore channels of the bed to increase the underflow concentration of the thickener.Furthermore,based on the research progress at home and abroad,the microscopic effect of the change of floc structure on the thick dewatering of tailings is deeply discussed,and the current problems and future development trends of tailings thickening of dewatering are put forward.