基于磁化水的含硫高黏性全尾砂充填新技术  

New technique of high viscosity sulfur-content total tailings backfilling based on magnetized water

作　　者：王新民[1] 李帅[1] 张钦礼[1] 贺严[1] 康虔[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2014年第12期4245-4250,共6页Journal of Central South University:Science and Technology

基　　金："十一五"国家科技支撑计划项目(2008BAB32B03)~~

摘　　要：为解决某硫铁矿含硫全尾砂浆体黏度大、易结块和管道输送性能差的问题,将磁化水引入全尾砂胶结充填的配浆试验中,研究不同磁化条件下,磁化水-全尾砂浆体的主要流变参数的变化规律;基于Fluent软件的充填管道输送流速和压力变化模拟,对磁化水-全尾砂浆体的输送性能进行分析。研究结果表明：在磁感应强度为0.1-0.2 T,磁化时间为20-30 min,水循环流速为2 m/s左右时,磁化水全尾砂浆体的表观黏度下降25%-30%,屈服剪切应力下降15%-20%,管道沿程阻力损失减少40%。磁化水在降低含硫高黏性全尾砂的屈服剪切应力和表观黏度、改善其管道输送性能、提高管道输送效率方面具有显著的优越性。To solve the problem of high viscosity, easy caking and poor transportability produced by the sulfur-content total tailings slurry in a pyrite mine, magnetized water was introduced to the proportion test of total tailings. Furthermore, the change laws of rheological properties about the total tailings slurry were explored under different magnetization conditions. Afterwards, the evaluation was performed through the numerical simulation of flow velocity change and pressure variation with the software of Fluent. The results show that the decrease of apparent viscosity, shear stresses and friction loss of pipes are 25%-30%, 15%-20% and about 40% respectively with the magnetic induction being 0.1-0.2 T, magnetized time being 20-30 min and cycling rate being 2 m/s. Therefore, the new backfilling technique based on magnetized water is capable of reducing the viscosity and shear stresses of the sulfur-content total tailings slurry, and improving its transportability and transport efficiency.

关 键 词：磁化水 含硫高黏性全尾砂 流变性能 磁化机理 Fluent数值模拟 

分 类 号：TD8[矿业工程—矿山开采]