立窑水泥熟料岩相分析

本文论述了硅酸盐水泥熟料的矿物特性,分析了重庆地区立窑水泥熟料的物理化学性质及岩相结构。试验分析结果表明,这种立窑水泥熟料具有急烧、慢冷以及在还原气氛下煆烧的特点,它的游离氧化钙含量较高,但是,其岩相结构基本上是正常的。因此,应用岩相分析方法指导生产是切实可行的。关于立窑水泥熟料的岩相结构与其强度之间的关系,以及影响熟料岩相结构的某些工艺因素,尚待进一步研究。     

镁渣配料煅烧水泥熟料的动力学研究

采用生料易烧性方法进行了实验,应用金斯特林格方程和阿累尼乌斯公式得出了熟料形成反应速率常数和熟料形成反应的表观活化能,利用XRD分析了镁渣的矿物组成。结果表明：镁渣可作为硅酸盐水泥熟料煅烧的原料使用,而且还可显著降低熟料形成反应的表观活化能,降低熟料的煅烧温度,加快熟料矿物的形成,缩短烧成时间。     

利用污水厂污泥配料煅烧水泥熟料研究

通过生料易烧性试验、水泥熟料矿物岩相分析、XRD、SEM、水泥胶砂强度试验等，对利用污水厂污泥代替部分粘土配料煅烧硅酸盐水泥熟料的过程，并对制备熟料的微观特征进行了研究。结果表明：污水厂污泥代替部分粘土烧制的水泥熟料，其矿物结构与常规的硅酸盐水泥熟料完全相同，且由污泥配料煅烧的熟料烧成温度有降低的趋势；其水泥水化和凝结、硬化过程与常规硅酸盐水泥完全相同；其水化产物结构与常规硅酸盐水泥完全相同；水泥胶砂强度达到50．0MPa。     

铁质原料对水泥熟料矿物形成及性能的影响

利用ＸＲＤ,ＯＭ,强度测定和化学分析等方法研究了不同铁质原料对硅酸盐水泥熟料矿物形成和熟料性能的影响,结果表明,掺加铜矿渣的生料具有更好的易烧性,能增加液相量,有利于熟料烧结,并能改善熟料的岩相结构和力学性能。     

急烧水泥熟料高温熔体中Al~(3 )、Fe~(3 )配位态的研究

运用 X-荧光分析和穆斯堡尔谱方法研究了急烧淬冷和普通方法煅烧而后淬冷的水泥熟料中 Al~(3 )和 Fe~(3 )的配位态。结果表明,在1310℃左右(急烧熟料烧成温度),急烧熟料熔融相内 Fe~(3 )大部份以六配位态存在,Al~(3 )以六配位态出现。这说明,在急烧条件下,熟料熔融相粘度较低。这将促进熟料的低温烧成。     

磷渣代替熟料作晶种对熟料形成的影响

本文研究了磷渣代替熟料作晶种对生料易烧性，熟料形成过程和熟料形成动力学的影响，研究表明，磷渣配料，由于形成中间相矿物Ｃ１１Ｓ４ＣａＦ２，可极大地改善生料易烧性，降低熟料形成活化能，加速熟料矿物的形成，从而使熟料烧成温度降低１００℃左右。     

高硫煤对熟料矿物形成及显微结构的影响

通过高温显微镜(HTM)、XRD、熟料化学分析和岩相分析等测试手段和分析方法,探讨了高硫煤对硅酸盐水泥熟料烧成及熟料显微结构的影响。结果表明,煤中硫可降低熟料液相出现温度,但过高的硫使生料在较高温下(≥1 300℃)的易烧性变差,不利于C3S矿物形成,最终使熟料中A矿数量减少而B矿增加;硫的存在虽阻碍了C3S形成,但又在一定程度上促进了A矿、B矿晶体的发育,使晶体尺寸增大。     

铁相——石膏固相反应动力学初探

在传统硅酸盐水泥熟料组成系统中，引入SO3（通常以CaSO4配料）不公使所形成的水泥熟料组成不同于硅酸盐水泥，同时也影响其矿物的形成机构及相互依存关系。本文用XRD、化学相分离方法，定量地研究了不同条件下铁相与石膏固相反应动力学特征，从而探讨了高铁水泥中主要熟料矿相C2AxF1-x和C4A3－／S的相对形成能力与温度、组成的关系，为进一步改善高铁水泥性能提供了基本思路。     

硅酸盐水泥熟料矿物在快速煅烧条件下的形成机理

快速升温煅烧水泥熟料,由于煅烧温度低、烧成时间短,具有明显的节能效果。目前国内外正在进行这种煅烧技术的积极探索,但仍缺乏较为系统的理论研究。本文采用特制的烧成实验设备,运用DTA、SEM、EPMA、XRD及其它常规测试分析方法,对快速升温煅烧过程中硅酸盐水泥熟料矿物的低温形成机理进行了系统的研究。     

水泥熟料配方及煅烧工艺探讨

选择易烧性较好的原燃料，适当提高水泥熟料中的n值，降低KH值，增加有效硅酸盐矿物成份（C3S＋C2S）的总量，从而提高了熟料的实物质量。     

EFFECT OF BURNING METHOD ON THE FORMING PROCESSES OF PORTLAND CEMENT CLINKER

The forming temperature of Clinker meltunderdifferent burning conditions has been studiedby appearance examination and thermal shrinkerdetermination, and the viscosity of melt has beendiscussed by studying the coordination number ofAl~(3 ) and Fe~(3 ) in cement clinker burned by differentmethod with x~- ray fluorescence analysis and Moss-bauer spectroscopy. The results show that the clin-ker melt under rapid burning may come into exis-tence at lower temperature and It's viscosity islower. So the forming processes of clinker may bedifferent at rapid burning from ordinary burning.They are probably an important factor to promote theformation of clinker burned at lower temperaturewith rapid burning method.     

THE FORMATION MECHANISM OF PORTLAND CEMENT CLINKER MINERALS IN RAPID BURNING

Cement clinker is burnt at the rapid heatingrate has the obvious effect of saving energy due tothe low burning temperature and short burning time.This kind of technique is being researched activelyin recent years,but the systemetical theoryinvestigation about the formation mechanism ofclinker minerals under this condition has not beenreported.In this paper,the formation mechanism ofportland cement clinker minerals in rapid burningwas studied by means of DTA,SEM,EPMA,XRDand other conventional testing methods by using aspecial burning equipment.     

硫酸钡对含碱水泥熟料形成和性能的影响

本文研究了硫酸钡在不同煅烧温度下对含碱水泥熟料形成和性能的影响，并对其作用机理进行了探讨。结果表明，ＢａＳＯ４参与煅烧虽仍能发生碱的硫酸盐化反应，部分ＢａＳＯ４还与铝相作用生成含钡无水硫铝酸钙，中间相中铝酸盐矿物减少。但系统中钡的影响更为突出，ＢａＯ主要固溶于贝利特中，使其以高活性的α型存在，钡同时又表现出强烈阻碍Ａ矿形成的特性。尤其随熟料硫碱摩尔比升高，钡的负作用更显著，熟料中ｆ－ＣａＯ剧增，各种性能严重变劣、表明按碱硫酸盐化的观点，不宜采用硫酸钡作为含碱熟料煅烧的改进剂。     

水泥熟料低温快速烧成研究

本文对在急剧升温煅烧水泥熟料过程中的煅烧温度和煅烧时间的确定,以及是否存在新生态活性氧化钙,促进C_3S的生成,加速熟料生成的速率等方面进行了一些实验研究和讨论,并提出了新的见解。     

EFFECTS OF DIFFERENT BURNING PROCESSES ON THE FORMATION KINETICS OF CEMENT CLINKER

Two different methods of burning cement clinker, a rapid burning method and an ordinary burning method used in rotary kiln, respectively, were compared in the laboratory. By means of determining fCaO in the clinkers, rule constant Kr and diffusion activation energy Ea in the two processes of clinker formation were calculated by using Ginstling-Brounshtein diffusion equation and Arrhenius equation. The results show that two processes have very different kinetic constants at the same temperature range 1280-1320C. The rate constant Kr at each temperature in the rapid burning process is much greater than that in the ordinary burning process and the former activation energy Ea is much smaller.     

Effect of Minor Elements on Silicate Cement Clinker

The effect of rare-earth and HX addition agent on the burn-ability of silicate cement dinker was investigated by orthogonal experiment. The result shows, compared with blank sample, f CaO of the .samples added with rare-earth and HX agent drops by 84.95% , its 3 d and 28d compressive strength enhances by 24.40% and 16.90% , respectively. It was discovered by means of X-ray diffrnction and high temperature microscope analysis that sintering temperature of the sample added with rare-earth and HX addition agent is about 1320℃. At the same time, the tmrning temperature of triealeium silicate desends and its crystal growth forming- rate increases. Tricalcium silicate content in burning clinker is higher and its crystal is larger.     

Optimization of the content of tricalcium silicate of high cementing clinker

Optimization of the content of tricalcium silicate(C 3 S)of high cementing clinker was investigated.The content of free-CaO(f-CaO),mineral composite,the content of C 3 S in the clinker and the hydration product were analyzed by chemical analysis and X-ray diffraction(XRD).K Valuemethod of QXRD was selected as a quantitative analysis way to measure the content of C 3 S,and the strength of cement paste was determined.The results show that at a water cement ratio of 0.29,the strength of cement paste with 73%C ...     

硅酸盐水泥系统Zeta-电位的测定

本文运用显微电泳法测定了硅酸盐水泥系统的Zeta-电位,考察了不同操作条件与液相环境对Zeta-电位的影响。通过实验,近似地认为:产物、单矿物和水泥熟料的Zeta-电位变化反映了该系统Zeta-电位的变化。     

硅酸盐水泥熟料着色机理的研究

本文研究了用天然原料烧制彩色硅酸盐水泥熟料的可能性和途径.采用了X射线衍射、岩相、扫描电镜和定点探针能谱分析,对彩色水泥热料作了分析鉴定.根据量子化学的配位场理论建立了弱场计算方案,从理论上明确了硅酸盐水泥熟料着色的机理和原因,并对工业生产彩色水泥提出了看法.