摘要
为降低全尾砂絮凝沉降成本,提高絮凝沉降效果,将磁化水引入某矿全尾砂絮凝沉降试验中,探讨磁化水在全尾砂絮凝沉降过程中的促凝作用;研究不同磁化条件下,全尾砂絮凝沉降速度和底流极限质量分数的变化规律。研究结果表明：在磁化水-全尾砂絮凝沉降过程中,絮凝剂单耗饱和点（沉降速度最大时）与普通水的单耗饱和点相比降低1/3,沉降速度提高1.4～2.1倍,底流质量分数最大增幅达3.2%;当磁感应强度B为150～200 m T,磁化时间t为20～25 min,水循环流速v为2.0～2.5 m/s时,沉降效果最理想;在适合的磁化条件下,磁化水在降低絮凝剂单耗、提高絮凝沉降速度和底流质量分数方面具有明显的优越性。
In order to reduce the cost of flocculating sedimentation of unclassified tailings and improve the effect of sedimentation, magnetized water was introduced to the flocculating sedimentation experiment of unclassified tailings from a mine. The effect of magnetized water on flocculating sedimentation was explored. Furthermore, the changing laws of flocculating sedimentation velocity and mass fraction of underflow of unclassified tailings were researched under different magnetization conditions. The results show that in the progress of flocculating sedimentation of magnetized water-unclassified tailings, the saturation point of the unit consumption of flocculants （sedimentation velocity is maximal） is 1/3 lower than that of tap water. Moreover, the increasing amplitude of sedimentation velocity and mass fraction of underflow are 1.4-2.1 times and 3.2%, respectively, Besides, flocculating sedimentation has the best effect when the magnetic induction B is 150-200 mT, magnetized time t is 20-25 min, and cycling rate of water v is 2.0-2.5 rn/s. Therefore, magnetized water is capable of reducing the unit consumption of flocculants and improving the sedimentation velocity and mass fraction of underflow under the condition of suitable magnetization.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第11期4256-4261,共6页
Journal of Central South University:Science and Technology
基金
"十二五"国家科技支撑计划项目(2012BAC09B02)~~
关键词
磁化水
全尾砂
絮凝沉降
磁化机理
magnetized water
unclassified tailings
flocculating sedimentation
magnetization mechanism
