基于工业级L管的膏体自流充填倍线研究
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摘要
矿山膏体充填的临界自流充填倍线是矿山膏体管道输送的重要参数。采用工业级的L管试验装置测定膏体料浆的流变参数,并推算矿山膏体临界自流倍线与流变参数之间的关系式,用工业试验数据证明了该公式的准确性。从充填倍线角度出发,分析膏体料浆流变参数和自流输送的规律,试验结果表明膏体临界自流充填倍线与屈服应力和塑性黏度系数有关,不同管径、不同流速下的膏体临界自流充填倍线可根据其流变参数进行计算。针对贵州某磷矿实际充填情况对膏体临界自流充填倍线进行了验证,结果表明矿山膏体临界自流充填倍线公式适用于矿山充填。
The critical gravity-flow times line of mine paste filling is an important parameter of mine paste pipeline transportation.The rheological parameters of paste slurry were measured byan industrial-grade L-pipe test device,and the relationship between critical gravity times line of mine paste and rheological parameters was deduced and the accuracy of the formula was proved by the industrial test data.From the perspective of filling times line,the rheological parameters of paste slurry and the law of gravity-flow transportation were analyzed.The test results show that the critical gravity-flow filling times line of paste is related to yield stress and plastic viscosity coefficient,and the critical gravity-flow filling times line of paste with different pipe diameters and flow rates can be calculated according to its rheological parameters.In light of the actual filling situation of a phosphate mine in Guizhou,the formula of paste critical gravity-flow filling times line was verified,and the result shows that the formula of mine paste critical gravity filling times line is suitable for the mine filling.
The critical gravity-flow times line of mine paste filling is an important parameter of mine paste pipeline transportation.The rheological parameters of paste slurry were measured byan industrial-grade L-pipe test device,and the relationship between critical gravity times line of mine paste and rheological parameters was deduced and the accuracy of the formula was proved by the industrial test data.From the perspective of filling times line,the rheological parameters of paste slurry and the law of gravity-flow transportation were analyzed.The test results show that the critical gravity-flow filling times line of paste is related to yield stress and plastic viscosity coefficient,and the critical gravity-flow filling times line of paste with different pipe diameters and flow rates can be calculated according to its rheological parameters.In light of the actual filling situation of a phosphate mine in Guizhou,the formula of paste critical gravity-flow filling times line was verified,and the result shows that the formula of mine paste critical gravity filling times line is suitable for the mine filling.
引文
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[2]JURE M,PRIMOZ T.Laminar flow of shear thickening fluid in a 90°pipe bend[J].Fluid Dynamics Research,2006,38(5):295-312.
[3]H N.I,A N.J.Developments in slurry pipeline technologies[J].Chemical Engineering Progress,2003,99(4):36-43.
[4]KC W,R C,A S.Operating points for pipelines carrying concentrated heterogeneous slurries[J].Powder Technology,2002,123(1):19-24.
[5]HEYWOOD N,ALDERMAN N J.Developments in slurry pipeline technologies[J].Chemical Engineering Progress,2003,12(4):36-43.
[6]WILSON K C,CLIFFT R,SELLGREN A.Operating points for pipelines carrying concentrated heterogeneous slurries[J].Powder Technology,2002,123(1):19-24.
[7]GRABINSKY M W.In situ monitoring for ground truthing paste backfill design[A].Proceedings of the 13th International Seminar on Paste and Thickened Tailings[C].Perth:Australian Centre for Geomechancis,2010.85-98.
[8]杨超.金属矿山尾矿高浓度管道输送技术研究[D].淄博:山东理工大学,2011.
[9]FALL M,NASIR O.Predicting the temperature and strength development within cemented paste backfill structure[A].Proceedings of the 13th International Seminar on Paste and Thickened Tailings[C].Perth:Australian Centre for Geomechancis,2010.125-136.
[10]李公成,王洪江,吴爱祥,等.基于倾斜管试验的膏体自流输送规律[J].中国有色金属学报,2014,24(12):3 162-3 164.
[11]陈琴瑞,王洪江,吴爱祥,等.用L管测定膏体料浆水力坡度试验研究[J].武汉理工大学学报,2011,33(1):108-112.
[12]BELEM T,FOURIE A B,FAHEY M.Time-dependent failure criterion for cemented paste backfills[A].Proceedings of the 13th International Seminar on Paste and Thickened Tailings[C].Perth:Australian centre for Geomechancis,2010.147-162.
[13]NASIR O,FALL M.Coupling binder hydration temperature and compressive strength development of underground cemented paste backfill at early at ages[J].Tunnelling and Underground Space Technology,2010,25:9-20.
[14]温震江,高谦,王忠红,等.基于FLUENT的全尾砂充填料浆输送特性模拟与分析[J].化工矿物与加工,2017,46(9):54-58.
[15]甘德清,高锋,吴永强,等.高浓度充填料浆自流输送浓度与管径匹配研究[J].化工矿物与加工,2016,45(4):52-55.
[16]路坊海,肖唐付,林剑,等.浅论贵州猫场铝土矿长距离管道输送工艺[J].化工矿物与加工,2015,44(8):15-17.