第11期 王勇等：絮凝剂用量对尾矿浓密的影响机理 ·1423· 高分子絮凝剂 高分子絮凝剂 粒径增大 部分尾砂颗粒网捕不到 尾砂颗粒 包裹水 (a) (b) (c) (d) 图6不同含量絮凝剂与尾砂作用机理.(a)低浓度：(b)合理浓度；(c)高浓度：(d)超高浓度 Fig.6 Mechanisms between tailings and flocculant with different contents:(a)low content;(b)reasonable content;(c)high content;(d)ultrahigh content 密分数随絮凝剂添加量增加略有下降 structure and permeability of flocculated structures and (2)随着絮凝剂添加量的增加，尾矿极限浓度 sediments using 3D tomographic imaging.Chem Eng Res 略有下降，主要是因为尾矿颗粒之间水分存在形式 Des,2005,83(7):844 发生细微变化.当不添加絮凝剂时，尾砂颗粒间 [6]Biirgera R,Damascenob JJ R,Karlsenc K H.A mathe 水分主要以孔隙水的形态存在：当添加絮凝剂后， matical model for batch and continuous thickening of floc- culated suspensions in vessels with varying cross section 尾砂颗粒间又新增了絮团水；当絮凝剂添加量较多 Int J Miner Process,2004,73(2-4):183 时，还有包裹水存在. [7]Shi X Z,Hu H Y,Du X H,et al.Experimental study on (3)结合实验结果，将每吨尾矿中絮凝剂添加 flocculating sedimentation of tailings slurry in a vertical 量由少至多划分了四个区间，分别为低含量(010 sand tank.Min Metall Eng,2010,30(3):1 g)、合适含量(10~25g)、高含量(25~40g)和超高 (史秀志，胡海燕，杜向红，等.立式砂仓尾砂浆液絮凝沉降 含量(40~55g).不同区间絮凝剂对尾矿作用的影 试验研究.矿冶工程，2010,30(3)：1) 响机理不同，分别为部分吸附、吸附架桥、保护和 [8]Jiao H Z,Wang H J,Wu A X,et al.Rule and mecha- 包裹作用. nism of flocculation sedimentation of unclassified tailings J Univ Sci Technol Beijing,2010,32(6):702 (焦华枯，王洪江，吴爱祥，等.全尾砂絮凝沉降规律及其机 参考文献 理.北京科技大学学报，2010,32(6)：702) [9]Wang H J,Chen Q R,Wu A X,et al.Study on the [1]Owen A T,Nguyen T V,Fawell P D.The effect of foccu- thickening properties of unclassified tailings and its appli- lant solution transport and addition conditions on feedwell cation to thickener design.J Univ Sci Technol Beijing, performance in gravity thickeners.Int J Miner Process, 2011,33(6):676 2009,93(2:115 (王洪江，陈琴瑞，吴爱祥，等。全尾砂浓密特性研究及其在 [2]Wang Y,Wang H J,Wu A X,et al.Research on floc- 浓密机设计中的应用.北京科技大学学报，2011,33(6)： culation sedimentation characteristics of fine unclassified- 676) tailings.Gold,2012,33(1):48 [10]Yu F,Zhang L.Tests on the filtering of Meishan fine tail- (王勇，王洪江，吴爱祥，等。细粒全尾矿絮凝沉降特性研究 ings.J Anhui Univ Technol,2010,27(Suppl 1):94 黄金，2012,33(1)：48) (于发，张林.梅山细粒尾矿过滤试验研究.安徽工业大学 [3]Wang Y,Wang H J,Wu A X,et al.Research of fine tail- 学报，2010,27（增刊1）：94) ings bleeding characteristics and influence factors.Gold, [11]Pearse M J.Historical use and future development of 201132(9):51 chemicals for solid-liquid separation in the mineral pro- (任勇，王洪江，吴爱祥，等.细粒尾矿泌水特性及其影响因 cessing industry.Miner Eng,2003,16(2):103 素.黄金，2011,32(9)：51) [12]Zhan HH,Long X B,Zhan X H.Fluid Mechanic Chem- [4]Eswaraiah C,Biswal S K,Mishra B K.Settling charac- istry Theory.Changsha:Central South University Press, teristics of ultrafine iron ore slimes.Int J Miner Metall 2007 Mater,2012,19(2:95 (湛含辉，龙小兵，湛雪辉.流体力化学原理.长沙：中南大 [5]Selomuya C,Jia X,Williams R A.Direct prediction of 学出版社，2007)第 11 期 王 勇等：絮凝剂用量对尾矿浓密的影响机理 1423 ·· 图 6 不同含量絮凝剂与尾砂作用机理. (a) 低浓度; (b) 合理浓度; (c) 高浓度; (d) 超高浓度 Fig.6 Mechanisms between tailings and flocculant with different contents: (a) low content; (b) reasonable content; (c) high content; (d) ultrahigh content 密分数随絮凝剂添加量增加略有下降. (2) 随着絮凝剂添加量的增加，尾矿极限浓度 略有下降，主要是因为尾矿颗粒之间水分存在形式 发生细微变化. 当不添加絮凝剂时，尾砂颗粒间 水分主要以孔隙水的形态存在；当添加絮凝剂后， 尾砂颗粒间又新增了絮团水；当絮凝剂添加量较多 时，还有包裹水存在. (3) 结合实验结果，将每吨尾矿中絮凝剂添加 量由少至多划分了四个区间，分别为低含量 (0∼10 g)、合适含量 (10∼25 g)、高含量 (25∼40 g) 和超高 含量 (40∼55 g). 不同区间絮凝剂对尾矿作用的影 响机理不同，分别为部分吸附、吸附架桥、保护和 包裹作用. 参 考 文 献 [1] Owen A T, Nguyen T V, Fawell P D. The effect of floccu￾lant solution transport and addition conditions on feedwell performance in gravity thickeners. Int J Miner Process, 2009, 93(2): 115 [2] Wang Y, Wang H J, Wu A X, et al. Research on floc￾culation sedimentation characteristics of fine unclassified￾tailings. Gold, 2012, 33(1): 48 (王勇, 王洪江, 吴爱祥, 等. 细粒全尾矿絮凝沉降特性研究. 黄金, 2012, 33(1): 48) [3] Wang Y, Wang H J, Wu A X, et al. Research of fine tail￾ings bleeding characteristics and influence factors. Gold, 2011, 32(9): 51 (王勇, 王洪江, 吴爱祥, 等. 细粒尾矿泌水特性及其影响因 素. 黄金, 2011, 32(9): 51) [4] Eswaraiah C, Biswal S K, Mishra B K. Settling charac￾teristics of ultrafine iron ore slimes. Int J Miner Metall Mater, 2012, 19(2): 95 [5] Selomuya C, Jia X, Williams R A. Direct prediction of structure and permeability of flocculated structures and sediments using 3D tomographic imaging. Chem Eng Res Des, 2005, 83(7): 844 [6] B¨urgera R, Damascenob J J R, Karlsenc K H. A mathe￾matical model for batch and continuous thickening of floc￾culated suspensions in vessels with varying cross section. Int J Miner Process, 2004, 73(2-4): 183 [7] Shi X Z, Hu H Y, Du X H, et al. Experimental study on flocculating sedimentation of tailings slurry in a vertical sand tank. Min Metall Eng, 2010, 30(3): 1 (史秀志, 胡海燕, 杜向红, 等. 立式砂仓尾砂浆液絮凝沉降 试验研究. 矿冶工程, 2010, 30(3): 1) [8] Jiao H Z, Wang H J, Wu A X, et al. Rule and mecha￾nism of flocculation sedimentation of unclassified tailings. J Univ Sci Technol Beijing, 2010, 32(6): 702 (焦华喆, 王洪江, 吴爱祥, 等. 全尾砂絮凝沉降规律及其机 理. 北京科技大学学报, 2010, 32(6): 702) [9] Wang H J, Chen Q R, Wu A X, et al. Study on the thickening properties of unclassified tailings and its appli￾cation to thickener design. J Univ Sci Technol Beijing, 2011, 33(6): 676 (王洪江, 陈琴瑞, 吴爱祥, 等. 全尾砂浓密特性研究及其在 浓密机设计中的应用. 北京科技大学学报, 2011, 33(6)： 676) [10] Yu F, Zhang L. Tests on the filtering of Meishan fine tail￾ings. J Anhui Univ Technol, 2010, 27(Suppl 1): 94 (于发, 张林. 梅山细粒尾矿过滤试验研究. 安徽工业大学 学报, 2010, 27(增刊 1): 94) [11] Pearse M J. Historical use and future development of chemicals for solid-liquid separation in the mineral pro￾cessing industry. Miner Eng, 2003, 16(2): 103 [12] Zhan H H, Long X B, Zhan X H. Fluid Mechanic Chem￾istry Theory. Changsha: Central South University Press, 2007 (湛含辉, 龙小兵, 湛雪辉. 流体力化学原理. 长沙: 中南大 学出版社, 2007)