粉煤灰综合利用 2013N0.1 FLY ASH COMPREHENSIVE UTILIZATION 试验与应用 钢渣微粉细粉磨工艺优化与试验分析 Optimization and Test Analysis of Superfine Grinding Process for Steel Slag Powder 刘国威,杨刚,王幼琴,金强 (中冶宝钢技术服务有限公司冶金渣研究中心,上海200941) 摘要:主要对钢渣微粉工艺进行分析比较,重点闹述了闭路细粉磨工艺的不同对微粉成品的影响.通过试验表 明,对工艺路线的调整可达到增加产能,提高产品质量稳定性的目的. 关键词:钢渣微粉;细粉磨;选粉机 中图分类号:TQ173.6*3文献标识码:A文章编号:1005-8249(2013)01-0038-02 Abstract:Through analysis and parison on the steel Slag micro powder techniques it focuses on expounding the effect of different closed-circuit fine grinding techniques to the powder product.The experiment result shows that by adjusting the technology route the capacity will be increased and the stability of product quality will be improved. Key words steel slag powder;fine grinding powder classifier 钢渣经过细磨至微粉后,通过机械力破坏了钢渣 从而达到增加产能提高成品粉质量的目的. 的晶体结构,使表面及潜在的活性得到了部分释放,彻 底解决了安定性的问题,为钢渣的应用提供了一种 1原材料 全新的应用途径,可以实现钢渣的无污染应用. 钢渣原料采用宝钢转炉热泼缓冷渣,粒径区间为 经过多年的试验与实践形成的“预粉磨细粉 0~5mm 其中0~3mm占70%,金属铁含量≤5%,含 磨”钢渣微粉生产工艺2.通过预粉磨实现渣与铁的 水量≤3%. 离解,细粉磨保证钢微粉的最终产品质量,其中预粉磨 工序与细粉磨工艺可以结合钢渣的原料(转炉、电炉 2试验过程与分析 渣,磁性与非磁性渣等)采用开路闭路、闭路闭 2.1传统的闭路细粉磨流程 路、开路开路、闭路开路组合的方法保证钢渣的铁 本试验选用动态选粉机和球磨机以及多道除铁器 质离解与微粉的最终产品质量. 作为闭路细粉磨系统,传统的工艺流程如图1. 根据多年的实践经验证明磁性钢渣(铁品位为 除铁器 30%以上的钢渣)粉磨到160目(96um)筛上筛下各 预磨粉 计量器 球磨机 50%左右,非磁性钢渣粉(铁品位为20%左右)粉磨 至平均粒径为200目(75μm)筛上筛下各50%左右 除铁器 时,可以实现渣铁离解彻底,根据经验处理处理非磁性 选粉机 合格粉 钢渣建议采用闭路粉磨工艺,这是由钢渣的易碎性、易 图1传统的闭路细粉磨工艺流程图 磨性来确定(3]. 通过“预粉磨”使钢渣达到相应细度从而获得渣 预磨粉通过计量器定量送人球磨机中粉磨后,通 铁分离状态已基本可以实现[.但在采用闭路磨粉 过动态选粉机选取出合格品粉,不合格粉则通过输送 工艺时,预粉磨物料全部进入细粉磨中通过循环负荷 设备送入球磨机中继续粉磨.在进行的大量...
关键词:标准稠度用水量;凝结时间;外加剂适应性;胶砂强度;醇胺类化合物 中图分类号:TU528.042文献标识码:A文章编号:1005-8249(2016)06-0019-04 Wu Zhiming,Wang Lin (School of Civil Engineering and Transportation,Beijing University Of CivilEngineering and Architecture,Beijing 100044,China) AbstractThissubjtminly chses triethanolaminediehyleetramieTrisprpanolmineminthl thnolamine polyvinyl all ammniuhhateasalystnthaetyheief thnmallntntnPandnt nad nsisteywtern time, and the adaptability of the admixtures,mortar strength etc.Test results show that,mixing alcohol amine pounds on the standard consistenywatr prducenreasing trend.rthanolamineand(hyroxylethyl)thlenediine significantly shrte theinital seting time andinal einmfnt ndtrisprpaolmnedihletmnextend theiitialeting fcmet nd shrenling timeof cement.Trisopropanolmine and N(2 hydroxyethyl) ethylenediamine in 0.2% dsae have no efect on the fow of cement,but N(2- hydroxyethylthylenedimine indoage f0.%increasesthelowf cement.Othergroups have anadveempact ntheadaptability f th cement andaixu.Iadiot th erlystrenthftrisprpanlminentet in.20%an0.50%deislowerthanthblakcm other grophaveicreasdivarying dereAstlarintesity,risrpanlmineianycnteissignifcanystrnger han triethanolamine. Key wordsstandard consistenywatrsetingtie;theadmixture adaptability;mortar strength;alchol amine;pounds 1研究背景及意义中添加0.01%~0.05%的助磨剂,便能明显地提高水泥
产量5%~30%。
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2018NO.4 试验与应用 超高性能混凝士胶凝材料组分优化分析 Analysis of Components Optimization of Ultra High Performance Concrete Cementitious Materials 王越洋1,欧忠文1,莫金川2,刘晋铭1,王经纬1 (1.陆军勤务学院军事设施系,重庆401311;2.海军勤务学院战勤指挥系,天津300450) 摘要:以海砂为骨料,对水泥、硅灰、纳米微珠、超细高炉矿渣粉、高效抗裂膨胀剂五种胶凝材料进行遵选及 配合比优化.采用混料设计中分析较为全面的单纯形重心设计的方法,对胶凝材料各掺量进行响应面分析及优化,建 立了可信度较高的回归模型,准确预测了超高性能混凝土达到最大28d强度时胶凝材料各组分的掺量. 关键词:胶凝材料;混凝土;水泥;硅灰;优化 中图分类号:TU528.31 文献标识码:A 文章编号:1005-8249(2018)04-0009-05 Wang Yueyang' Ou Zhongwen' Mo Jinchuan Liu Jinming' Wang Jingwei (1.Army Logistics University of PLA Chongqing 401311 Chongqing China; 2.Naval Logistics University Tianjin 300450 China) Abstract:Using sea sand as aggregate five cementitious materials including cement silica fume nano micro-bead slag powder and anti- eracking admixture were selected and the mix ratio was optimized.Using the simplex center of gravity design method which is more prehensive in the analysis of mixed materials response surface analysis and optimization were performed on each dosage of cementitious materials and a highly reliable regression model was established to accurately predict the maximum performance of ultra-high performance concrete for 28 days. The amount of each ponent of the gelling material in strength. Keywords:cementitious materials;concrete;cement:silica fume;optimization 超高性能混凝土(UHPC)是一种具有高强度、优化的研究也取得了一定成果.Richard等(3)利用可 高耐久性的建筑材料,其能够在条件苛刻的环境中长 压缩堆积模型(CPM)对混合物的颗粒进行优化研究, 期使用1.21,得到了学者的广泛关注.UHPC是由多 制备出一种UHPC.而Fennis等[4则认为...
粉煤灰综合利用 2013NO.2 FLY ASH COMPREHENSIVE UTILIZATION 专题研究 超高性能水泥基材料的制备及其强度影响因素研究 Study on the Preparation Methods of Ultra-high Performance Cement-based Material and its Strength Influence Factors 刘数华12,徐志惠2,张洁3,刘显军4 (1.建筑安全与环境国家重点实验室,北京100013; 2.武汉大学水资源与水电工程科学国家重点试验室,武汉430072; 3.湖北三箭建筑工程有限公司,随州441300; 4.随州九易通路桥公司随州,441300) 摘要:超高性能水泥基材料是继高强、高性能混凝土之后,出现的一种力学性能、耐久性能都非常优越的新型建筑 材料.本文通过大量试验,分析水胶比、粉煤灰、养护条件对超高性能水泥基材料抗压强度的影响,并采用扫描电镜 (EM)来探究矿物掺合料(主要是粉煤灰和玻璃粉)对硬化浆体微观形貌及水化产物影响的微观机理.研究结果表明: 超高性能水泥基材料的强度随水胶比的减小而增大;粉煤灰可以作为擦合料加人超高性能水泥基材料中,能改善RPC 微观结构,提高其性能;高温蒸养可显著提高超高性能水泥基材料的强度. 关键词:超高性能水泥基材料;强度;水胶比;粉煤灰;养护 中图分类号:TU528.31 文献标识码:A 文章编号:1005-8249(2013)02-0016-03 Liu Shuhua Xu Zhihui Zhang Jie Liu Xianjun (1.State Key Laboratory of Building Safety and Built Environment Beijing 100013; 2.State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072; 3.Hubei Sanjian construction engineering Co.Ltd.Suizhou 441300: 4.Suizhou Jiuyitong Roads and Bridges Co.Ltd.Suizhou 441300) Abstract:The ultra-high performance cement-based material es after the high-strength and high-performance concrete. which is a new kind of building material with ultra-high mechanical properties and durability.In this paper a lot of tests have been done to study the impact of water-binder ratio fly ash curing condition on the strength and the microscopic mechanism by using scanning e- lectron microscopy (SEM).The testing results show:the strength of ultra-high performance cement-based ...
粉煤灰综合利用 FLYASHCOMPREHENSIVEUTILIZATION 2017NO.4 表面活性剂应用于碳纳米管分散处理的研究现状* Review on the Dispersion of Carbon Nanotubes via the Surfactants Application for Stabilization 杨恒,刘小艳,张玉梅,梁涛,李田雨 (河海大学力学与材料学院,江苏南京210098) 摘要:由于碳纳米管(CNTs)的强分子间作用力使得在水溶液和其他体系中确保其具有良好分散性一直是一个 挑战,致使CNTs复合材料功能化和可靠性的进展要求探索出完善的处理工艺、以发挥其优异的机械、电学、磁学和 光学性能。
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2012NO.1 专题研究 粗骨料颗粒堆积简化计算模型的研究 Research on the Simplified Computation Model of the Coarse Aggregate Particle Packing 姜曼2,张雄2,张永娟12,彭亦博13 (1.同济大学建筑材料研究所,上海201804; 2.同济大学先进土木工程材料教育部重点实验室,上海201804; 3.昆山市建设工程质量检测中心,江苏215337) 摘要:提出了一种粗骨料颗粒堆积简化计算模型.此模型将粗骨料颗粒特征化为椭圆形颗粒,利用定量体视学原 理采集粗骨料颗粒的形状特征参数,建立了骨料颗粒的堆积法则,设计了可以快速计算其堆积密度的计算方法,得到了 粗骨料实际堆积密度PR与虚拟堆积密度PV的修正公式PR=0.896PV8.697.经验证,修正后的虚拟堆积密度与实 际堆积密度的平均相对误差仅为0.32%,准确度较高.可利用此模型计算出的骨料堆积空隙率,进行混凝土配合比设 计. 关键词:粗骨料堆积;椭球形颗粒;简化计算模型;堆积密度 中图分类号:TU528.04 文献标识码:A 文章编号:1005-8249(2012)01-0009-06 JIANG Man.2 ZHANG Xiong'.2 ZHANG Yong-juan PENG Yi-bo.3 (1.Institute of Building Materials Tongji University Shanghai 201804 China: 2.Key Laboratory of Advanced Civil Engineering Materials of Education Tongji University Shanghai 201804 China; 3.Kunshan Construct Engineering Quality Testing Center Jiangsu 215337 China) Abstract:A simplified putation model of aggregate packing was built with the coarse aggregate being simulated as ellipse particle.The packing rule had been establiahed and the simplified method to calculate the packing density had been designed The packing density can be calcu- lated very fast after gathering the shape characteristic parametern from the picture of the aggregate based on the quantitative stereology.The model through which a modified formula pR =0.896pV8.697 was found out where the pR was real packing density and the pV was virtual packing density.The modified model was proved to be accurat...