(中南大學 資源與安全工程學院 深部金屬礦床開發(fā)與災害控制重點實驗室，長沙 410083)
摘 要: 為解決新橋礦含硫全尾砂漿體黏度大、易結塊以及管道輸送性能差的問題，將發(fā)泡技術引入全尾砂膠結充填配漿實驗中，研究灰砂比、質量分數(shù)和氣泡率的變化對漿體流變性能的影響。基于Fluent 的充填管道輸送流速和壓力變化模擬，對三相流態(tài)充填體的輸送性能進行分析。結果表明：灰砂比為1:6、質量分數(shù)為72%、氣泡率為20%時，三相流態(tài)充填漿體較同配比不含氣泡的兩相流態(tài)漿體泌水率降低29%，黏度降低17%，管道沿程阻力降低25%。氣相成分的加入在降低含硫高黏性充填漿體的剪切應力和塑性黏度以及改善其管道輸送性能和提升管道輸送效率方面具有顯著的優(yōu)越性。
關鍵字: 含硫高黏性尾砂；發(fā)泡技術；三相充填漿體；流變性能；管道輸送
（Key Laboratory of Mineral Resources Exploitation and Hazard Control for Deep Metal Mines,
School of Resources and Safety Engineering, Central South University, Changsha 410083, China）
Abstract:In order to improve transportability of its high sulphur content crude tailings with such bad features as high viscosity and easily caking, foaming agent was used in cemented crude tailings backfill test in Xinqiao Pyrite Mine. Influences of cement-tailings-ratio, mass fraction of slurry and bubble rate of foaming agent on rheological properties of backfill slurry were studied, and correspondence of rheological properties of backfill slurry to slurry velocity and pressure within the transporting pipe was simulated based on Fluent software. The results show that dewatering proportion, viscosity and friction loss of backfill slurry with cement-tailings ratio of 1:6 and mass fraction of 72% can be reduced by 29%, 17% and 25%, respectively, if foaming agent with bubble rate of 20% is added. Therefore, pipeline transportability of high sulphur content crude tailings backfill slurry can be greatly improved, and its pipeline transporting efficiency can be obviously raised by addition of gas phase material owing to the reduction of the viscosity and shear stresses.
Key words: sulfur-content slurry with high viscosity; foaming technology; three-phase backfill slurry; rheological properties; pipeline transportation
