超细全尾砂静态絮凝沉降规律及其在立式砂仓设计中的应用
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摘要
针对超细全尾砂浆絮凝沉降速度慢、沉降后的底流质量分数低的问题,选取内蒙某金矿超细全尾砂,以絮凝剂类型、单耗,尾浆质量分数为影响因素,依次进行单因素5水平静态絮凝沉降试验。通过Origin软件对液面沉降高度和速度进行绘图分析;通过非线性拟合,描述尾浆质量分数数学模型,并根据尾浆质量分数极限值和现场经验对尾砂浓密效果进行评估;通过Doesresp函数和Matlab软件,分析高径比与压密尾浆质量分数的关系,对立式砂仓设计进行初步分析。结果表明,选择Rh1050型絮凝剂,单耗为20g/t,当超细尾浆质量分数为15%时,静态絮凝沉降效果最佳,初始沉降速度可达6mm/s。提出了底流质量分数压密预测模型和立式砂仓高径比为4的建议。
In order to solve the problems of slow flocculation sedimentation velocity and low underflow concentration after sedimentation for the ultrafine whole tailings,the ultrafine whole tailings from a gold mine in Inner Mongolia were selected to conduct single-factor 5 horizontal static flocculation sedimentation test with type of flocculant,unit consumption and tailings slurry concentration as influencing factors.Origin software was used to plot and analyze the settlement height and the velocity of liquid surface.The mathematical model of tailings slurry concentration was described by nonlinear fitting,and the effect of tailings thickening was evaluated according to the limit value of tailings slurry concentration and on-site experience.The relationship between the high diameter ratio and the compacted tailings slurry concen-tration was analyzed by Doesresp function and Matlab software,and the design of vertical sand bin was preliminarily analyzed.The results showed that when Rh1050 flocculant was selected with a unit consumption of 20 g/t and the concentration of ultrafine tailings slurry 15%,the static flocculation sedimentation effect was the best,and the initial settling velocity could reach 6 mm/s.The prediction model of underflow concentration compaction and the suggestion of vertical sand bin with height-diameter ratio of 4 were put forward.
In order to solve the problems of slow flocculation sedimentation velocity and low underflow concentration after sedimentation for the ultrafine whole tailings,the ultrafine whole tailings from a gold mine in Inner Mongolia were selected to conduct single-factor 5 horizontal static flocculation sedimentation test with type of flocculant,unit consumption and tailings slurry concentration as influencing factors.Origin software was used to plot and analyze the settlement height and the velocity of liquid surface.The mathematical model of tailings slurry concentration was described by nonlinear fitting,and the effect of tailings thickening was evaluated according to the limit value of tailings slurry concentration and on-site experience.The relationship between the high diameter ratio and the compacted tailings slurry concen-tration was analyzed by Doesresp function and Matlab software,and the design of vertical sand bin was preliminarily analyzed.The results showed that when Rh1050 flocculant was selected with a unit consumption of 20 g/t and the concentration of ultrafine tailings slurry 15%,the static flocculation sedimentation effect was the best,and the initial settling velocity could reach 6 mm/s.The prediction model of underflow concentration compaction and the suggestion of vertical sand bin with height-diameter ratio of 4 were put forward.
引文
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[23]张钦礼,邵佳,陈秋松.基于降黏效应的碎石全尾砂最佳配合比研究[J].有色金属工程,2017,7(1):71-75.
[24]王志凯.超声波作用下尾砂浆浓密规律及流变特性研究[D].北京:北京科技大学,2018.
[25]王勇,王洪江,吴爱祥.基于高径比的深锥浓密机底流质量分数数学模型[J].武汉理工大学学报,2011,33(8):113-117.
[2]Xie W.The application prospect of tailings disposal technology based on mining backfill[J].Industrial Safety&Environmental Protection,2008.
[3]杨盛凯,王洪江,吴爱祥,等.尾矿高质量分数排放技术发展概况及展望[J].中国安全科学技术生产,2010,6(5):283 3.
[4]张钦礼,周登辉,王新民,等.超细全尾砂絮凝沉降试验研究[J].广西大学学报(自然科学版),2013,38(2):452-455.
[5]吴爱祥,王洪江.金属矿膏体充填理论与技术[M].北京:科学出版社,2015.
[6]张去非.絮凝剂的种类及其在尾矿沉降中的应用[J].金属矿山,2008(6):69-72.
[7]吴爱祥,周靓,尹升华,等.全尾砂絮凝沉降的影响因素[J].中国有色金属学报,2016,26(2):439-446.
[8]王勇,王洪江,吴爱祥,等.细粒全尾矿絮凝沉降特性研究[J].黄金,2012,33(1):48-51.
[9]李宗楠,郭利杰,许文远,等.极细粒级尾砂絮凝沉降规律试验研究[J].中国矿业,2014,23(S2):215-218.
[10]高志勇,吴爱祥,焦华喆,等.全尾砂动态浓密沉降规律研究[J].有色金属(矿山部分),2017,69(2):1-6.
[11]张去非.金岭铁矿选矿厂尾矿絮凝沉降的研究[J].矿冶工程,2007(2):25-29.
[12]刘凯,黄德镛,张明旭,等.大红山铜矿全尾砂絮凝沉降的试验研究[J].中国矿业,2008,17(12):60-63.
[13]李建军,乔尚元,朱金波,等.煤泥水磁化改性及磁化-絮凝沉降研究[J].洁净煤技术,2015,21(4):1-4.
[14]王勇,吴爱祥,王洪江,等.絮凝剂用量对尾矿浓密的影响机理[J].北京科技大学学报,2013,35(11):1 419-1 423.
[15]王洪武,吴爱祥,刘超,等.五道岭钼矿全尾砂絮凝沉降试验研究[J].昆明理工大学学报(理工版),2010,35(2):14.
[16]焦华喆,王洪江,吴爱祥,等.全尾砂絮凝沉降规律及其机理[J].北京科技大学学报,2010,32(6):702-707.
[17]陈洪松,邵明安.细颗粒泥沙的絮凝沉降特性[J].土壤通报,2002,33(5):356-359.
[18]孙琦,张向东,杨逾,等.公路下充填开采的相似材料及数值模拟研究[J].广西大学学报(自然科学版),2011,36(4):635-639.
[19]Henriquez,Julio,Simms,et al.Dynamic imaging and modeling of multilayer deposition of gold paste tailings[J].Minerals Engineering,2009,22(2):128-139.
[20]Patience Mpofu,Jonas Adda-Mensah,John Ralston.Investigation of the effect of polymer structure type on flocculation,rheology and dewatering behavior of kaolinite dispersions[J].Internationa Journal of Mineral Processing,2003,71(1):247-268.
[21]刘晓辉,吴爱祥,王洪江,等.膏体充填尾矿浓密规律初探[J].金属矿山,2009(9):38-41.
[22]武汉水利电力学院.土力学及岩石力学[M].北京:水利出版社,1982.
[23]张钦礼,邵佳,陈秋松.基于降黏效应的碎石全尾砂最佳配合比研究[J].有色金属工程,2017,7(1):71-75.
[24]王志凯.超声波作用下尾砂浆浓密规律及流变特性研究[D].北京:北京科技大学,2018.
[25]王勇,王洪江,吴爱祥.基于高径比的深锥浓密机底流质量分数数学模型[J].武汉理工大学学报,2011,33(8):113-117.