全尾砂动态浓密沉降规律研究  

Dynamic thickening sedimentation of unclassified tailings

作　　者：高志勇[1,2] 吴爱祥[1,2] 焦华喆[3] 王洪江[1,2] GAO Zhiyong WU Aixiang JIAO Huazhe WANG Hongjiang(Key Laboratory for High-Efficient Mining and Safety of Metal, Ministry of Education, Beijing 100083, China School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China School of Civil and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China)

机构地区：[1]金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与资源工程学院,北京100083 [3]河南理工大学土木工程学院,河南焦作454000

出　　处：《有色金属（矿山部分）》2017年第2期1-6,共6页NONFERROUS METALS(Mining Section）

基　　金：国家自然科学基金项目(51574013);国家自然科学基金项目(51374034)

摘　　要：为考察全尾砂动态浓密沉降特性规律,采用自制小型连续浓密机模拟动态沉降过程,以底流浓度为评价指标,控制单因素变量获得泥层高度、搅拌速度和料浆停留时间对评价指标的影响规律,以膏体定义体系确定最佳底流浓度范围为70.90%~72.55%。结果表明,底流浓度与泥层高度和料浆停留时间呈正相关关系,并随着搅拌速度的增快先升高再下降且存在最大底流浓度。另外发现在尾矿颗粒压密过程中存在反应加速区、反应缓冲区和反应完成区,现场提供料浆浓度为30%、设置搅拌速度为0.3rpm且料浆停留时间不得少于8h时可以得到最佳底流浓度。In order to investigate the dynamic thickening sedimentation of unclassified-tailings, using small homemade continuous thickener simulates dynamic thickening sedimentation process of unclassified-tailings, the underflow concentration is regarded as the evaluation index, single factor variables are controlled to obtain the influence rules of mud height, stirring speed and slurry residence time on evaluation indexes, the optimal underflow concen- tration range is 70.90 % -72.55 %, which is determined by the definition of paste. The experimental results show： with the increase of stirring speed, underflow concentration increased first and then decreased, and the maximum underflow concentration exists. The reaction acceleration zone, reaction buffer zone and reaction complete zone are found to exist during compaction of tailings grains, the slurry concentration provided is 30%, the stirring speed is set to be 0.3 rpm and the slurry residence time should not be less than 8 h when the optimal underflow concentration can be obtained.

关 键 词：动态浓密沉降 底流浓度 泥层高度 搅拌速度 料浆停留时间 

分 类 号：TD853.34[矿业工程—金属矿开采]