玲珑金矿全尾砂絮凝沉降特性试验
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摘要
目前全尾砂胶凝充填是金属矿山充填采矿法的发展方向,全尾砂浓缩沉降是实现矿山连续高效充填的技术关键。以山东玲珑金矿全尾砂和5种絮凝剂为原料,开展了全尾砂静态絮凝沉降试验,采用控制单一变量试验方法,以沉降速度和沉降底流浓度为参考指标,对絮凝剂各参数对絮凝沉降的影响进行了研究。结果表明:阴离子型絮凝剂(分子量为1 200万)絮凝效果最佳,尾砂沉降速度最快;当絮凝剂溶液浓度为0.2%,单耗为75 g/t时,沉降效果最佳,继续增大絮凝剂溶液浓度和单耗,会导致絮凝剂和全尾砂溶液黏度增大,沉降速率和底流浓度减小。在上述分析的基础上,建立了絮凝沉降全过程力学模型,将沉降全过程分为3个阶段,并分别进行了力学分析,得出了沉降全过程理论曲线,供相关研究参考。
The unclassified tailings(UT)cementing filling is the developing direction of filling mining method in metal mine at present.Concentrated sedimentation of the UT is the key technology to achieve continuous and high-efficient filling inthe mine.With the UT from Linglong Gold Mine in Shandong Province and five kinds of flocculants as raw materials,the static flocculation experiment of UT is carried out.The control method of single variable is used to study the influence of various pa-rameters of flocculant on flocculation and sedimentation by using sedimentation velocity and sedimentation underflow concentration as reference indexes.The results show that anionic flocculants(molecular weight 12 million)has the best effect on thesedimentation of UT,with the fastest sedimentation velocity.The optimum parameters for the flocculation and sedimentation process are determined:when the flocculant solution concentration is 0.2% and the unit consumption is 75 g/t,the sedimenta-tion effect is best.Gradually increasing the concentration and unit consumption of the flocculant solution,can result in increasing the viscosity of flocculant and UT solution,and decreasing the sedimentation rate and the underflow concentration.Basedon the above discussion results,the mechanical model of flocculation sedimentation is established,and the whole process of sedimentation is divided into three stages,and the theoretical curve of the whole process of sedimentation is obtained by the mechanical analysis,so as to provide some reference for the related studies.
The unclassified tailings(UT)cementing filling is the developing direction of filling mining method in metal mine at present.Concentrated sedimentation of the UT is the key technology to achieve continuous and high-efficient filling inthe mine.With the UT from Linglong Gold Mine in Shandong Province and five kinds of flocculants as raw materials,the static flocculation experiment of UT is carried out.The control method of single variable is used to study the influence of various pa-rameters of flocculant on flocculation and sedimentation by using sedimentation velocity and sedimentation underflow concentration as reference indexes.The results show that anionic flocculants(molecular weight 12 million)has the best effect on thesedimentation of UT,with the fastest sedimentation velocity.The optimum parameters for the flocculation and sedimentation process are determined:when the flocculant solution concentration is 0.2% and the unit consumption is 75 g/t,the sedimenta-tion effect is best.Gradually increasing the concentration and unit consumption of the flocculant solution,can result in increasing the viscosity of flocculant and UT solution,and decreasing the sedimentation rate and the underflow concentration.Basedon the above discussion results,the mechanical model of flocculation sedimentation is established,and the whole process of sedimentation is divided into three stages,and the theoretical curve of the whole process of sedimentation is obtained by the mechanical analysis,so as to provide some reference for the related studies.
引文
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[2]孙光华,李青山.采空区充填技术研究[J].矿业研究与开发,2011,31(5):16-17.Sun Guanghua,Li Qingshan.Study on the technology of filling goaf[J].Mining Research and Development,2011,31(5):16-17.
[3]Wang Y F,Gao B Y,Yue Q Y,et al.Effect of viscosity basicity and organic content of composite flocculant on the decolorization performance and mechanism for reactive dyeing wastewater[J].Journal of Enviromental Sciences,2011,23(10):1626-1633.
[4]Song W D,Wu S,Li H F,et al.Study of basic characteristics of full tailings filling material[C]//Materials for Renewable Energy&Environment(ICMREE).2011 International Conference on IEEE,Beijing:IEEE Beijing Section,2011:1055-1059.
[5]彭乃兵,吴爱祥,王洪江,等.全尾砂絮凝沉降工艺研究[J].矿业研究与开发,2015,35(7):35-38.Peng Naibing,Wu Aixiang,Wang Hongjiang,et al.Research on flocculation sedimentation technology of unclassified taitings[J].Mining Research and Development,2015,35(7):35-38.
[6]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.Jiao Huazhe,Wang Hongjiang,Wu Aixiang.Rule and mechanism of flocculation sedmientation of unclassified tailings[J].Journal of University of Science and Technology Beijing,2010,32(6):702-707.
[7]王新民,刘吉祥,陈秋松,等.超细全尾砂絮凝沉降参数优化模型[J].科技导报,2014,32(17):23-28.Wang Xinmin,Liu Jixiang,Chen Qiusong,et al.Optimal flocculating sedimentation parameters of unclassified tailings[J].Science&Technology Review,2014,32(17):23-28.
[8]Selomulya C,Jia X,Williams R A.Direct prediction of structure and permeability of flocculated structures and sediments using 3Dtomographic imaging[J].Chemical Engineering Research and Design,2005,83(7):844-852.
[9]Eswaraiah C,Biswal S K,Mishra B K.Settling characteristics of ultrafine iron ore slimes[J].International Journal of Minerals Metallurgy and Materials,2012,19(2):95-99.
[10]张金凤.基于格子玻耳兹曼方法的粘性泥沙絮凝机理研究[D].天津:天津大学,2007.Zhang Jinfeng.Lattice Boltzmann Simulation for Flocculation Dynamics of Cohesive Sedimen[tD].Tianjin:Tianjin University,2007.
[11]王立.无机高分子絮凝剂在胶结充填应用中的选择及影响分析[J].化工矿物与加工,2016,45(8):70-74.Wang Li.Selection and impact analysis of application of inorganic polymer flocculant in cemented filling in a mine[J].Industrial Mineral&Processing,2016,45(8):70-74.
[12]Tridib T,Bhagat R P,Singh R P.The flocculation performance of grafted sodium alginate and otherpolymeric flocculants in relation to iron ore slime suspension[J].European Polymer Journal,2001,37(1):125-130.
[13]张钦礼,王石,王新民.絮凝剂单耗对全尾砂浆浑液面沉速的影响规律[J].中国有色金属学报,2017,27(2):318-324.Zhang Qinli,Wang Shi,Wang Xinmin.Influence rules of unit consumptions of flocculants oninterface sedimentation sedimentation velocity of unclassified tailings slurry[J].The Chinese Journal of Nonferrous Metals,2017,27(2):318-324.