热重-红外联用气体产物光谱信号定量研究

针对热重-红外联用分析中确定气体产物的释放速率对了解热分解过程、气固反应的重要性, 通过关联热重分析仪中测得的固体样品质量损失速率, 提出了依据傅里叶红外光谱仪测得的非对称性气体产物响应光谱信号强度时间变化,获得该气体逸出速率的定量校正分析方法.并以热重-红外联用碳酸钙样品热分解过程为例, 重点讨论了载气流速、样品质量等参数对逸出气体光谱信号滞后、形变的影响. 结果发现,气体传输滞留时间、扩散逆混合时间主要取决于载气流速, 而与样品质量无关.     

铜尾矿替代粘土煅烧硅酸盐水泥熟料的研究

以铜尾矿、石灰石、铁矿石为原料,进行水泥生料配方优化试验,开展煅烧硅酸盐水泥熟料研究,f-CaO测定、XRD矿物分析为手段确定水泥熟料煅烧的配比参数.实验结果表明,以铜尾矿替代粘土,辅以钙质、铁质及铝质校正原料,采用0.88的石灰饱和系数,2.4的硅率,1.530的铝率可制备出水化活性较高的硅酸盐水泥熟料,为铜尾矿的处理利用寻找到一条很好的出路.     

煤与油棕榈空果串富氧混烧特性的研究

利用热重-红外联用(TG-FTIR)分析了Adaro煤与棕榈空果串(EFB)在富氧混烧工况下的特性.热重分析仪记录样品在加热过程中的质量损失,而FTIR则分析其释放的气体产物.对在18%O_2/82%CO_2,Air(21%O_2/79%N_2),21%O_2/79%CO_2,30%O_2/70%CO_24种工况下Adaro coal+30%EFB样品进行燃烧.热重分析表明,与O_2/N_2工况相比,O_2/CO_2条件下CO_2气体对燃烧有抑制作用,且空气工况下与30%O_2/70%CO_2的燃烧特性相当.FTIR分析释放的气体主要是CO_2,CO,H_2O.     

水泥熟料计量仪的研制

介绍了水泥熟料计量仪的基本原理、特点、仪器配置及软件流程 .重点指出该仪表适用于散装固体物料的流量检测 ,并对仪器有待解决的问题进行了介绍     

粉煤灰为原料的高铁水泥熟料的实验研究

本文用粉煤灰完全替代粘土原料,运用正交试验方法,探索研制符合国家标准的高强水泥熟料的最佳配料方案及煅烧制度;利用X射线衍射分析、扫描电镜及岩相检验等测试手段对所得熟料和水泥水化试样进行测试,得出了“高铁”、低温烧成的优选方案,探讨了各种因素对熟料质量的影响。     

水泥熟料中阿里特的热分解定量法研究

本文研究了利用热分解法测定硅酸盐水泥熟料中阿里特含量的方法。并与显微镜定量法进行了对比。用此方法对水泥熟料中阿里特作定量分析,结果令人满意。     

流化床煅烧水泥熟料：实现热水（蒸汽）—水泥联产的试验研究

本文根据流化床燃烧特点,采用快速煅烧法,用沸渣直接在流化床内保持流化床温度为800～900℃,烧成水泥熟料,实现热水(蒸汽)-水泥的联产。     

金属尾矿代黏土配料煅烧水泥熟料试验研究

为获取金属尾矿代黏土配料用于水泥熟料生产的工艺参数以及分析金属尾矿对不同品位石灰石的适应性，选取6种金属尾矿，在实验室高温炉不同温度下进行尾矿代黏土配中、高钙石灰石煅烧水泥熟料的试验研究.对试验所得熟料样品分别进行了游离氧化钙质量分数的测定和矿物组成X射线衍射（XRD）分析.试验结果表明，金属尾矿代黏土与中钙、高钙石灰石配料均能烧制出合格熟料；熟料的烧成温度较黏土配料1 450 ℃的烧成温度降低了100～150 ℃；当金属尾矿配中钙石灰石时在1 300 ℃即可完成熟料烧成，与金属尾矿配高钙石灰石时1 350 ℃的煅烧温度相比，金属尾矿配中钙石灰石更适合水泥熟料烧成.     

铁尾矿配料的普通水泥熟料形成及其节能效果

研究不掺加铁尾矿、单掺铁尾矿及铁尾矿与矿化剂复掺时普通水泥熟料的形成过程 ,确定铁尾矿配料时熟料形成动力学特性 ,对不同配料的熟料形成的反应表观活化能和铁尾矿配料节能效果进行理论计算和分析     

Prediction of free lime content in cement clinker based on RBF neural network

Considering the fact that free calcium oxide content is an important parameter to evaluate the quality of cement clinker, it is very significant to predict the change of free calcium oxide content through adjusting the parameters of processing technique. In fact, the making process of cement clinker is very complex. Therefore, it is very difficult to describe this relationship using the conventional mathematical methods. Using several models, i e, linear regression model, nonlinear regression model, Back Propagation neural network model, and Radial Basis Function (RBF) neural network model, we investigated the possibility to predict the free calcium oxide content according to selected parameters of the production process. The results indicate that RBF neural network model can predict the free lime content with the highest precision (1.3%) among all the models.     

平炉钢渣配制水泥的研究

分析了钢渣的组成，介绍了钢渣利用的可能途径，提出了用平炉钢渣作为普通硅酸盐水泥水硬性混合材综合利用的方案．     

用电解锰渣制备高铁硫铝酸盐水泥熟料

以湘潭电化集团“两矿法”生产电解二氧化锰排放的电解锰渣（EMR）为原料,采用X射线荧光光谱分析（XRF）、扫描电子显微镜一能谱仪（SEM—EDS）、X射线衍射（XRD）、热重分析（TG）等检测手段对其化学组成、形貌特征、物相结构及物化性质进行了分析．结果表明,电解锰渣是一种富含Si、S、Fe、Ca、Al的材料,可以用作烧制高铁硫铝酸盐水泥（FAC）熟料的原材料．分别考察了煅烧温度、保温时间、电解锰渣掺量对高铁硫铝酸盐水泥抗压强度的影响,当煅烧温度1200℃、保温时间60min、电解锰渣掺量25％左右时为煅烧工艺的最优条件,3d抗压强度最高可达49．8MPa．研究结果可为电解锰渣的资源化利用提供新的途径和方向．     

Quantitative XRD Analysis of Cement Clinker by the Multiphase Rietveld Method

1　IntroductionPhasesincementclinkerhavebeenquantifiedbyBouge ,microscopeorXRDmethods .TheBougemethodisareconstructionofthechemicalanalysis ,basedonanequilibriumsystem ,whilemicroscopecountingistediousandtime -consuming .Aldridgegaveasummaryofthestatusoftheaccuracyandprecisionofphasequantifica tioninPortlandcementbytheabovethreebasictech niques .HepointedouttheXRDmethodhasagreaterpo tentialforanindustriallaboratorythantheBougeormi croscopemethods[1] .However,theXRDmethoddidnotgivesatisfa…     

锌渣代替铁粉生产水泥的实践

锌渣是冶炼锌的废渣,其主要成分与铁粉相似,所以可用作铁质校正原料,而且锌渣中含有亚铁,在熟料烧成中可起矿化作用,降低熟料的烧成温度和热耗;作者对锌渣代替铁粉作为生料配料的可行性进行了分析,并通过生产实践,证明锌渣代替铁粉是完全可行的,而且生产的水泥性能好,经济效益显著.     

The mechanical properties of coastal soil treated with cement

The influences of cement type, cement content, and curing time on the unconfined compression strength （UCS） of soil-cement were investigated. The influence of groundwater on UCS of soil- cement was also studied. The experimental results indicate that the soil treated with high grade cement presents a higher UCS. Additionally, the UCS of soil-cement presents linearly increased with the cement content. A logarithm correlation between UCS and curing time presents to forecast the strength development. Compared with the UCS of samples immersed in distilled water, those immersed in groundwater oresent a hizher value.     

Influence of characteristics of alumina-silicate raw materials on the formation process of clinker

The traditional alumina-silicate raw materials, for example, clays, in the precalcining technique of cement production, have been replaced by low grade and high silica content sandstones, shales, and industrial waste residues, including fly ashes, slag, and others. The results are the change of compositions and characteristics of raw materials applied and a great effect on cement calcination process and clinker formation. In this work, the cement clinker formation process of different alumina-silicate raw materials to replace clay raw material was studied by chemical analysis, X-ray diffraction, differential thermal analysis, and high temperature microscope based on the characteristics of the alumina-silicate raw materials. The formation heat of the clinker was determined by the acid dissolution method. Influence of different alumina-silicate raw materials on the clinker burnability and formation process was studied. The results show that the changing of alumina- silicate raw materials, especially using industrial waste residues, can reduce the formation temperature of high temperature liquid phases, improve the burnability of raw materials, reduce the formation temperature and formation heat of clinker. And this study also observed the formation temperature and transformation of high temperature liquid phases in the heating process of raw materials by high temperature microscope.     

不同水泥掺量胶结钙质砂的导热性能及微观结构分析

钙质砂的导热性能影响周围土体的传热过程,引起不同环境温度下钙质砂的工程力学性能变化及灾害效应。基于热针法分析5种不同水泥掺量（P_s=5%、7.5%、10%、12.5%、15%）胶结钙质砂的导热系数变化规律,利用SEM、MIP、NMR技术综合揭示该过程中胶结钙质砂微观孔隙结构变化的本质特征,在此基础上阐释热特性演化的微观机理。试验结果表明：胶结钙质砂的导热系数λ随水泥掺量P_s的增大而递增,P_s小于10%时,λ呈线性递增,P_s大于10%时,λ增长缓慢;随着水泥掺量P_s的增大,胶结钙质砂中孔隙数量越来越少,孔隙占比下降明显,但P_s增大到10%后,总孔隙面积、孔隙数量、孔隙率等微孔隙结构参数变化减缓;不同水泥掺量胶结钙质砂的导热系数λ与其微观孔隙结构变化呈负相关关系,本质原因在于凝胶状的水泥水化产物连续填充了胶结钙质砂孔隙,降低了其孔隙率,改善了砂样内部传热,宏观表现为其导热系数λ随水泥掺量P_s的增大而增大。