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靖安县生活污水处理厂规模小、污泥产量少,针对这种情况,本文结合本县实际,提出了比较适合实现该地污水处理厂污泥减量化、无害化、稳定化和资源化处理处置的方法. 相似文献
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水是人们赖以生存的基础,近些年来对于水环境治理工作的关注度不断提升.在污水处理中,工业污水占据着关键地位,工业污水每年的排放量非常大,出现的污染物种类较多,再加上生产技术的变革,工业污水的处理难度不断加大.反渗透处理技术是膜分离技术应用中的关键技术类型,属于物理性质的污水处理技术,在处理过程中具备着处理效率高,污染较小... 相似文献
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随着油田注水开发的深入,油田采出污水水质变化幅度和处理难度不断增加,采用常规处理难以达到油田注水标准.严重影响了油田的正常生产.以陕北某低渗透油田采油污水为研究对象,采用斜板混凝沉降-过滤法对该采油污水进行处理研究.研究结果表明,采用无机聚合物絮凝剂WXT-766与有机阳离子助凝剂WT-831复配使用具有很好的处理效果.在这种处理工艺条件下,可使处理后污水含油质量浓度降至5.0 mg/L、悬浮物质量浓度降至3.0 mg/L、悬浮物粒径<2.0 μm,达到了低渗透油藏注入水水质指标. 相似文献
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宋明芹 《中国石油和化工标准与质量》2011,31(3)
本文从油田污水地面处理的重要性出发,分析了油田污水地面处理的工艺流程,最后主要讲解了油田污水地面处理的方法。最后得出:只有不断提高污水地面处理技术,才能更好的为油田服务。 相似文献
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随着石油工业的不断发展,对采油污水的处理和回用的要求越来越高,采油污水精细处理已经成为注水开发效果的关键技术和前提。本文介绍了当前中低渗透油田采油污水精细处理技术的发展现状、所面临的矛盾和问题,以及对采油污水膜分离处理技术的展望。 相似文献
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以城市垃圾焚烧飞灰(以下简称焚烧飞灰)为主要原料,在实验室电炉里成功研制了阿利尼特水泥熟料。本文主要研究水泥熟料煅烧形成过程及其水化性能,分析了阿利尼特水泥的适宜石膏掺量、水化放热特征、水化产物及其显微结构。研究结果表明:利用垃圾焚烧飞灰为主要原料可以成功烧制阿利尼特水泥熟料,煅烧过程中首先出现C2S、C12A7和C2S·CaCl2,随后与MgO和CaCl2反应生成阿利尼特;掺加5%二水石膏可以促进阿利尼特水泥水化,较普通硅酸盐水泥更快,阿利尼特水泥可以作为一种早强快硬型水泥使用;阿利尼特水泥主要水化产物除含有硅酸盐水泥中常见的CSH凝胶、棒状AFt和Ca(OH)2晶体外,还含有C3A·CaCl·210H2O晶体。 相似文献
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利用化学分析法、X射线衍射分析(XRD)、扫描电子显微镜(SEM)、热重分析(TG-DSC)等检测手段对电解锰渣、镁渣的化学组分、矿物组成、物化性能进行分析.根据分析结果,合理设计以锰渣、镁渣为原料制备硫铝酸盐水泥熟料的配比方案,并考察烧结温度对熟料性质的影响.在制备的水泥熟料中掺入一定量的石膏可制备出早强、快硬的硫铝酸盐水泥.在此过程中测定水化放热过程,并分析石膏掺量与水泥抗折和抗压强度的关系,确定最佳的石膏掺量.实验结果表明,电解锰渣、镁渣可以作为有价值的原料制备硫铝酸盐水泥熟料,两种废渣的掺比可分别达到21%,烧结过程的最佳温度为1260 ℃,保温时间为30 min,此时烧结出的试样的矿物相主要为C2S、C4A3S-.当石膏掺量为15%时,放出的水化总热最多,制备出的水泥力学性能最好,28 d的抗折强度为5.1 MPa,抗压强度为31.2 MPa,抗渗等级达到P6,烧制熟料和水化产物将锰渣和镁渣中的重金属有效的固化稳定,不易被浸出. 相似文献
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P.E. Tsakiridis S. Agatzini-Leonardou M. Katsioti 《Cement and Concrete Research》2005,35(11):2066-2073
The aim of the present research work was to investigate the possibility of adding a jarosite-alunite chemical precipitate, a waste product of a new hydrometallurgical process developed to treat economically low grade nickel oxides ores, in the raw meal for the production of Portland cement clinker. For that reason, two samples of raw meals were prepared, one with ordinary raw materials, as a reference sample ((PC)Ref) and another with 1% jarosite-alunite precipitate ((PC)J/A). Both raw meals were sintered at 1450 °C. The results of chemical and mineralogical analyses as well as the microscopic examination showed that the use of the jarosite-alunite precipitate did not affect the mineralogical characteristics of the so produced Portland cement clinker. Furthermore, both clinkers were tested by determining the grindability, setting time, compressive strength and expansibility. The hydration products were examined by XRD analysis at 2, 7, 28 and 90 days. The results of the physico-mechanical tests showed that the addition of jarosite-alunite precipitate did not negatively affect the quality of the produced cement. 相似文献
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以Texaco气化炉渣、石灰石、粘土和铁粉为原料制备硅酸盐水泥熟料,分别采用X射线衍射仪、金相显微镜对该熟料的物相以及岩相结构进行分析,掺加适量石膏后,依据国标检测水泥的标准稠度用水量、安定性、凝结时间以及龄期强度,推断出制备水泥的标号.结果表明:(1)制备的水泥熟料主要矿相为硅酸三钙、硅酸二钙、铝酸三钙、铁酸钙.(2)当粘土加入量为5%,烧成温度为1450℃时,烧制的水泥28 d抗折强度、抗压强度分别为8.0 MPa、50.9 MPa,可推断其标号为42.5水泥. 相似文献
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用不同比例的硅钙渣替代石灰石和黏土掺入水泥生料中,在不同的烧成温度(1200℃、1250℃、1300℃、1350℃、1400℃和1450℃)下进行煅烧,对烧成熟料的易烧性、矿物组成及矿物相的微观形貌进行分析.研究结果表明:在生料中掺加硅钙渣有助于液相形成、降低水泥熟料的烧成温度和改善生料的易烧性,更有利于烧成贝利特熟料,不利于烧成阿利特熟料.在生料中硅钙渣的掺量较高(60%)时,硅钙渣中微量氧化钠的存在使生料在烧成时形成不利于C3 S晶体形成和成长的碱性液相及价键较强AlO5-4和FeO5-4四面体,从而使烧成熟料中的C3 S矿物不论从外观还是Ca/Si摩尔比都接近C2 S矿物. 相似文献
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The study reports on the hydration characteristics of eco-cement clinkers produced with waste sludge ash as raw components. The tested mixtures were composed of different types of waste sludge ash, including sewage sludge ash, water purification sludge ash, limestone, and ferrate, prepared using the optimum proportioning method. The mixtures were burned at 1400 °C for 6 h. The clinkers thus obtained were quantified and the hydration characteristics of the eco-cement pastes prepared from the waste sludge ashes. The setting time, compressive strength, hydrates and porosity distribution were examined at various ages. The 28-day compressive strength of the early high strength developing of eco-cement C paste outperformed that of ordinary Portland cement paste by 3 MPa. It is supposed that the large quantity of limestone used provided CaO, which in turn enhanced the formation of C3S, leading to the greater compressive strength development in the eco-cement C paste. From the porosity distribution, shown by the Mercury Intrusion Porosimetry results, it was found that, with increasing curing ages, the gel pores (<0.01 μm) increased and the total porosity and capillary pores (>0.01 μm) decreased—a result that shows that hydrates had filled the pores. This resulting densification and enhanced later strength were caused by the shifting of the pore size distribution to a smaller diameter range. 相似文献
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使用全组分废弃混凝土替代部分原材料烧制水泥熟料能够提高建筑垃圾利用率,但这将不可避免地引入石英态的SiO2,对生料易烧性和熟料质量带来不利影响。本文以石英砂为硅质原料,配制高石英含量的生料,按不同比例掺入氟硫矿化剂(m(F)/m(SO3)=0.4),研究了氟硫矿化剂对高石英含量水泥生料易烧性、熟料煅烧过程、熟料矿物组成与结构、熟料水化后抗压强度以及水化产物形貌的影响。试验结果表明,氟硫矿化剂掺加到高石英含量水泥生料中能够显著改善生料的易烧性,减少系统液相出现和降低C3S析晶温度,促进熟料矿物形成,熟料水化后的抗压强度也更高,水化产物更致密。氟硫矿化剂中CaF2的质量掺量从0.5%增加至1.5%时,C3S晶体长径比变小,熟料水化后的抗压强度有少许降低。 相似文献