泵送剂对膏体料浆管道输送的影响  

The Effect of Pumping Aid on Paste Pipeline Transportation

作　　者：杨柳华[1] 王洪江[1] 吴爱祥[1] 潘贵豪 刘斯忠[1] 李红[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]新兴铸管集团资源投资发展有限公司,北京100070

出　　处：《金属矿山》2014年第11期22-26,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51374034);"十二五"国家科技支撑计划项目(编号:2012BAB08B02)

摘　　要：膏体泵送系统沿程阻力大,常造成管路爆裂、接头泄漏等事故,严重制约着膏体充填技术的进步与发展。以流变性能极差的某铜矿膏体料浆为例,在满足充填强度和泵送要求的前提下,通过添加泵送剂改善膏体的流变特性,与不添加泵送剂作对比实验,分析了时间对添加泵送剂后料浆流变特性的影响。实验表明,该铜矿全尾砂膏体符合宾汉体特征,添加泵送剂减小了浓度对流动性能的影响,在满足输送条件下,可使流变性能极差的膏体料浆浓度提高到78%。结合理论分析,探讨了充填料浆在添加泵送剂条件下的减阻作用及长时间作用下膏体坍落度损失机理,认为泵送剂可以有效应用于膏体料浆管道输送减阻、降低管道磨损,且负面影响很小。The high on-way resistance along the pipeline system usually leads to some problems like pipeline explosions and leakage at joints etc. ,which have posed a serious restriction on the development of paste backfill technology. Taking the paste slurry with the poor rheological properties from a copper mine as a case, some pumping aid was added to improve its rheo- logical properties on the basis of achieving the required filling strength and pumping acquirements. Then, contrast was made with the paste without pumping aid, and the effect of time on rheological properties of the paste slurry with pumping aid added was analyzed. The testing results indicated that, the paste made from full tailings conformed to Bingham features. The addition of pumping aid lowered the effect of concentration on rheological properties, which made the concentration of the paste slurry increased to 78% under the condition of meeting the transporting requirements. Combining with the theoretical analysis, the effect of pumping aids on drag reduction and the mechanism of slump loss of paste slurry after a long time were discussed. It is considered that pumping aid has a dramatic effect on reducing on-way resistance along pipelines and decreasing the abrasion of pipeline with less negative effects.

关 键 词：膏体泵送 流变特性 减阻 泵送剂 坍落度损失 

分 类 号：TD853[矿业工程—金属矿开采]