酸浸钢渣制备磁性絮凝剂及其在油田废水处理中的应用  

Preparation of Magnetic Flocculant from Acid-Leached Steel Slag and Its Application in Oilfield Wastewater Treatment

作　　者：蒋成银 孟海龙 蒋崇珊 杨建兴 李桂菊 张陈德 王思远 JIANG Cheng-yin;MENG Hai-long;JIANG Chong-shan;YANG Jian-xing;LI Gui-ju;ZHANG Chen-de;WANG Si-yuan(Gas Production Plant 3 of PetroChina Changqing Oilfield Company,Wushenqi 017300,China;College of Marine and Environmental Sciences,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]中国石油长庆油田分公司第三采气厂,中国乌审旗017300 [2]天津科技大学海洋与环境学院,中国天津300457

出　　处：《湖南师范大学自然科学学报》2024年第4期90-96,共7页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(22276135);中国石油长庆油田公司科学研究与技术开发项目(2023-15543)。

摘　　要：通过酸浸法处理炼钢厂废料,经过水解和聚合反应制成一种磁性絮凝剂,可实现资源再利用。X射线衍射分析显示,该絮凝剂主要成分是γ-Fe_(2)O_(3),红外谱图和Zeta电位分析证实其为无机高分子混凝剂,其主要絮凝机理为吸附电中和。研究发现,制备过程中熟化时间对铁离子形态转化有显著影响,经过5天熟化制备的产品中Fe(b)含量最高,絮凝效果最佳。在应用实验中以长庆油田苏里格气田采出液为研究对象,该絮凝剂的适用pH范围为7~11,最佳投加量为0.3~0.4 g/L。实验结果显示,该絮凝剂使浊度去除率高达99%以上,COD去除率达64%以上。与市场上常用的聚合氯化铝相比,其沉降速度更快,下层絮体体积更小,性能优异,应用前景广阔。In this contribution,the steelworks waste underwent acid leaching to be hydrolyzed and polymerized into a magnetic flocculant,thereby achieving resource recycling.X-ray diffraction analysis revealed that the received flocculant primarily consisted ofγ-Fe_(2)O_(3).Furthermore,infrared spectroscopy and Zeta potential characterizations indicated that it was an inorganic polymer flocculant,with the main flocculation mechanism being adsorption and electric neutralization.It was found that the maturation time had a significant impact on the transformation of iron ion.The product obtained after 5 days of maturation exhibited the highest Fe(b)content,signifying the most effective coagulation component and optimal coagulation effect.Application experiments conducted on the produced liquid of Sulige gas field from Changqing oilfield demonstrated that the coagulant was effective within a pH range of 7~11,with an optimal dosage of 0.3~0.4 g/L.Under these conditions,the turbidity removal rate exceeded 99%,and the COD removal rate surpassed 64%.In comparison to the commonly used PAC in the market,this coagulant boasted several outstanding features,including a faster sedimentation rate and a smaller volume of settled flocs,indicating its extensive range of application prospects.

关 键 词：磁性絮凝剂 资源再用 沉降性能 油田废水 

分 类 号：TQ421[化学工程] X703.1[环境科学与工程—环境工程] X741