摘要
针对宝日希勒露天煤矿矿井水中悬浮颗粒物粒径小、难去除的问题,采用单因素与正交实验方法确定了混凝沉淀工艺的最佳参数,分析了矿井水中细颗粒物的混凝机理。结果表明,混凝沉淀的最佳工艺参数为聚合氯化铝(PAC)投加量50 mg/L,非离子型聚丙烯酰胺(NPAM)投加量5.0 mg/L,快速搅拌(300 r/min)时间1 min,慢速搅拌(50 r/min)时间8 min,静置时间5 min;在最佳工艺条件下,悬浮物(SS)质量浓度为5.0 mg/L,去除率为99.1%,相比单独投加PAC时,10μm以下的细颗粒物去除率提高了25.9%,矿井水的ζ电位由-40.9 mV降低至-16.3 mV,说明细颗粒物的混凝机理主要为PAC吸附电中和作用和聚丙烯酰胺(PAM)吸附架桥作用。
In response to the issue of small particle size and difficult removal of suspended particles in the mine water of Baorixile open-pit coal mine,this study probed into the optimal parameters of the coagulation and precipitation process through single-factor and orthogonal experiments,and explored the mechanism behind the coagulation of fine particles in mine water.The optimal process parameters for coagulation and precipitation include:50 mg/L of polyaluminum chloride(PAC),5.0 mg/L of non-ionic polyacrylamide(NPAM) under 1 minute of rapid stirring(300 r/min),8 minutes of slow stirring(50 r/min),and 5 minutes of settling.Under these optimum process conditions,the concentration of suspended solids(SS) is 5.0 mg/L with a removal efficiency of 99.1%.Compared to the sole addition of PAC,the removal efficiency of fine particles below 10 μm increased by 25.9%.Additionally,theζpotential of the mine water decreased from-40.9 mV to-16.3 mV,indicating that the coagulation mechanism of fine particles is mainly attributed to the adsorption and charge neutralization of PAC and the bridging effect of PAM.
作者
侯嫔
秦浩铭
刘昊
徐东莹
贾舒涵
张周爱
王建兵
HOU Pin;QIN Haoming;LIU Hao;XÜDongying;JIA Shuhan;ZHANG Zhouai;WANG Jianbing(School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Shenhuabao Rixile Energy Co,LTD,Hulunbuir Inner Mongolia 021025,China)
出处
《矿业科学学报》
CSCD
北大核心
2024年第2期278-285,共8页
Journal of Mining Science and Technology
基金
山西省重点研发计划(202102090301006)
中央高校越崎青年学者“资助计划”(2020QN09)
国家重点研发计划(2018YFC0406404-5)
神华宝日希勒能源有限公司研究项目(CSIEZC190104242)。
关键词
矿井水
细颗粒
悬浮物
混凝沉淀
参数优化
ζ电位
混凝机理
mine water
fine particles
suspended matter
coagulation and precipitation
parameter opti-mization
ζpotential
coagulation mechanism
