微细粒浮选精煤絮凝脱水试验研究
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摘要
为改善浮选精煤压滤过程中微细颗粒煤的损失问题,提出了絮凝压滤脱水工艺,探索了絮凝剂类型及用量、凝聚剂类型及用量对浮选精煤絮凝沉降效果的影响;试验表明,分子量1 000万的阴离子型絮凝剂的效果优于其他絮凝剂,凝聚剂中明矾的凝聚效果优于聚合氯化铝和氯化钙;在浮选精煤煤浆浓度为150 g/L,最佳用量絮凝剂为1.6 mg/L、凝聚剂为400 mg/L条件下,浮选精煤絮凝沉降上清液浊度可降至16.81 NTU,浮选精煤絮凝压滤脱水的精煤回收率比直接压滤脱水提升8.9个百分点,微细粒精煤损失减少61.49%,滤饼水分降低1.67个百分点。
In order to reduce the loss of flotation concentrate ultrafine during the press filtration,a process of flocculation and press filtration was proposed. The influence of the type and dosage of flocculent and coagulant was explored on the flocculation and settling of flotation concentrate slurry. The test shows that the anionic flocculent with a molecular weight of10 million is better than other kinds of flocculent. As for coagulant,The agglomeration effect of alum is better than that of polyaluminium chloride and polycalcium chloride. When the concentration of flotation concentrate slurry is 150 g/L,the best dosage is 1. 6 mg/L of flocculent and 400 mg/L of coagulant. The turbidity of upper clarified liquid during the flocculation and settling of flotation concentrate slurry can be reduced to 16. 81 NTU. The recovery rate of flotation concentrate by flocculation and press filtration is 8. 9% higher than that by direct press filtration. The loss of ultrafine concentrate ultrafine is reduced by 61. 49%,and the moisture content of filter cake is 1. 67% lower.
In order to reduce the loss of flotation concentrate ultrafine during the press filtration,a process of flocculation and press filtration was proposed. The influence of the type and dosage of flocculent and coagulant was explored on the flocculation and settling of flotation concentrate slurry. The test shows that the anionic flocculent with a molecular weight of10 million is better than other kinds of flocculent. As for coagulant,The agglomeration effect of alum is better than that of polyaluminium chloride and polycalcium chloride. When the concentration of flotation concentrate slurry is 150 g/L,the best dosage is 1. 6 mg/L of flocculent and 400 mg/L of coagulant. The turbidity of upper clarified liquid during the flocculation and settling of flotation concentrate slurry can be reduced to 16. 81 NTU. The recovery rate of flotation concentrate by flocculation and press filtration is 8. 9% higher than that by direct press filtration. The loss of ultrafine concentrate ultrafine is reduced by 61. 49%,and the moisture content of filter cake is 1. 67% lower.
引文
[1] 降林华,朱书全,邹立壮,等.阳离子高分子絮凝剂在细粒煤泥水中的应用[J].煤炭科学技术,2008(5):97-100.
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[8] 吕一波,刘亚星,张乃旭.絮凝药剂CPSA对高泥化煤泥水沉降特性的影响[J].黑龙江科技大学学报,2014,24(2):157-161.
[9] 唐海香,张荣曾.煤泥水絮凝过程动力分析机[J].煤炭学报,2005,30(3):371-373.
[10] 张明青,刘炯天,何伟,曾艳,刘汉湖,刘琴亚.煤泥水絮凝处理中絮凝体的分形特征[J].环境科学研究,2009,22(8):956-960.
[11] Tao D,Parekh BK,Liu JT.Chen S.An investigation on dewatering kinetics of ultrafine coal[J].International Journal of Mineral Processing,2003(70):235-249.
[12] Levy LM,Attwell D,Hoover F,et al.Use of surfactants to aid the Dewatering of fine clean coal[J].Fuel,1998,77(12):1349-1356.
[13] 施正盼,关江,刘颖,董江涛.基于胶体化学和乳状液理论分析乳状液脱稳破乳机理及方法[J].内蒙古环境科学,2009,21(3):66-69.
[2] 商贵军.絮凝剂溶解液制备及自动添加机理研究[D].太原理工大学博士学位论文,2010.
[3] 刘惠中,孙传尧.选矿精矿压滤脱水过程的优化[J].中国矿业大学学报,2009,38(2):219-223.
[4] 杨毛生,郭德,魏树海.煤泥脱水回收设备及其发展方向[J].选煤技术,2011(4):74-77.
[5] 孙华峰,张晋霞.高分子絮凝剂对浮选精煤离心脱水的影响因素分析[J].煤炭工程,2006(10):88-90.
[6] 夏畅斌,黄念东,何绪文.表面活性剂对细粒煤脱水的试验研究[J].煤炭科学技术,2001,29(3):41-42.
[7] D.Tao,J.G.Groppo,B.K Parekh.Enhanced ultrafine coal dewatering using flocculation filtration processes[J].Minerals Engineering,2000,13(2):163-171.
[8] 吕一波,刘亚星,张乃旭.絮凝药剂CPSA对高泥化煤泥水沉降特性的影响[J].黑龙江科技大学学报,2014,24(2):157-161.
[9] 唐海香,张荣曾.煤泥水絮凝过程动力分析机[J].煤炭学报,2005,30(3):371-373.
[10] 张明青,刘炯天,何伟,曾艳,刘汉湖,刘琴亚.煤泥水絮凝处理中絮凝体的分形特征[J].环境科学研究,2009,22(8):956-960.
[11] Tao D,Parekh BK,Liu JT.Chen S.An investigation on dewatering kinetics of ultrafine coal[J].International Journal of Mineral Processing,2003(70):235-249.
[12] Levy LM,Attwell D,Hoover F,et al.Use of surfactants to aid the Dewatering of fine clean coal[J].Fuel,1998,77(12):1349-1356.
[13] 施正盼,关江,刘颖,董江涛.基于胶体化学和乳状液理论分析乳状液脱稳破乳机理及方法[J].内蒙古环境科学,2009,21(3):66-69.