燃烧法合成新型蓝色硅酸盐长余辉材料及其发光性能的研究

采用燃烧法快速合成了Sr2MgSi2O7：Eu^2 ，Dy^3 新型蓝色长余辉材料，用x射线粉末衍射表征材料的相组成和晶体结构，用激发和发光光谱、余辉亮度对材料的发光性质进行表征并对该体系发光机制进行了讨论。结果表明，燃烧法和高温固相法合成的这种长余辉材料具有相同组成和结构，燃烧法可以快速制备出细粉体。合成材料的激发带峰值位于356nm，发射光谱峰值在475nm，是典型的Eu^2 的4f-5d跃迁所产生，余辉时间5h以上。     

添加催化助燃剂降低烧结焦耗的工业试验

为了降低固体燃料消耗和强化烧结，在考虑烧结用焦粉和烧结工艺特点的基础上，制备出适用于焦粉燃烧的催化助燃剂，并在河西堡铁厂进行了添加助燃剂的工业试验。结果表明，在该厂原料和技术条件下，往焦粉中添加0．137％(按焦粉的质量百分数，下同)左右的催化助燃剂，可节焦8．06％，烧结机利用系数增加3．63％，成品率提高3．44个百分点，烧结矿的质量略有改善。     

HTAC辐射管在燃气真空热处理炉中的应用

概要介绍了HTAC辐射管技术，并阐述了其结构和特点，以及蓄热式辐射管燃气真空炉结构和特性。     

Mineralogy of clean coal combustion by-products

Coal combustion technologies are changing in order to burn coal more cleanly. Many “clean combustion“ and postcombustion technologies are developed to remove SO2 and NOx gases, particulate matter during combustion, or from the flue gases leaving the furnace. This paper focuses on three types of fly ash (flue gas desulfurization (FGD) residuals, atmospheric fluidized bed combustion (AFBC) residuals and sorbent duct injection (SDI) residuals) which produced by “the clean combustion“ and postcombustion technologies. The residuals formed by FGD are PCFA (pulverized coal fly ash) grains entrained with reacted and unreacted sorbent and have lower bulk densities than PCFA grains because it contains higher concentrations of calcium and sulfur, and lower concentrations of silicon, aluminum and iron than PCFAs. AFBC residuals consist of spent bed which is a heterogeneous mixture of coarse-grained bed material and irregularly shaped, unfused, spherical PCFAs. The main crystalline phases in AFBC residuals are anhydrite (reacted sorbent), quartz and lime (unreacted sobent), calcite, hematite, periclase, magnetite and feldspars.The residuals produced by SDI contained 65%-70% PCFA with the larger sizes material being irregularly shaped, fused or roughedged. The reaction products of sorbent (portlandite and lime) included calcium sulfate (anhydrite) and calcium sulfate. The chemical properties of these residuals are similar to those of high calcium PCFAs because of the high alkalinity and high pH of these residuals.     

Preparation,Structural Analysis and Luminescence Properties of Nanocrystalline Phosphor Gd2O3∶Eu

Nanocrystalline monoclinic and cubic Gd2O3∶Eu with different Eu3 concentration were prepared using glycine-nitrate combustion synthesis. By changing the ratio of glycine to nitrate and proper heat treatment, pure monoclinic and cubic Gd2O3∶Eu with particle size less than 40 nm can be easily formed. Under ultraviolet excitation, main emission of Eu3 (5D0→7F2) locates at 624 nm in monoclinic Gd2O3∶Eu and 611 nm in cubic sample. In excitation spectrum two broad bands corresponding to the host absorption and charge transfer state(CTS) and f-f transitions of Gd3 and Eu3 were observed and discussed. The quenching concentration of monoclinic and cubic Gd2O3∶Eu is 10% and 15%, respectively, both of which are much higher than that of bulk Gd2O3∶Eu.     

湖南省动力用煤煤质特性评估体系

将动力用煤的燃烧特性、结渣特性以及运行的特征参数有机地结合在一起，进行综合评估．单一的特性指数在反映煤质特性方面具有一定的分辨率，但却难以全面准确地反映动力燃煤的传性．在工程应用中，煤质的固有特性又和具体设备及运行条件结合在一起，使得单一的判别指数更显得无能为力．为提高其分辨能力，特提出动力用煤煤质特性的评估体系。     

关于低热值材料燃烧热值结果的影响因素探讨

对于一些低热值并意向达到A级燃烧性能的建筑材料,燃烧热值是评估的必检项。由于该类材料热值低,测试时不易点燃,无法获得准确测试结果,因此需通过人工干预手段使其完全燃烧。本文针对测试标准中的坩埚试验方法,探究测试过程中的影响因素,如样品形状、添加助燃剂苯甲酸的形状、上述两者在测试时相对摆放位置及其质量比例等对测试结果的影响,从而确定有助于样品完全燃烧的试验方式。     

高温空气燃烧技术研究与应用现状及发展方向

简述了蓄热式高温空气燃烧技术的形成背景、技术原理、技术特点、发展过程以及国内外的研究与应用现状，介绍了蓄热式高温空气燃烧技术的应用条件与适应范围，分析了现有技术的不足与发展方向。     

不同热解工艺下半焦的微观结构特点及其对燃烧性能的影响

摘要：对比研究了3种直立内热炉半焦(熄焦方式分别为水泡熄焦、喷水熄焦及烟气干熄焦)及一种流化床热解半焦的微观结构及燃烧性能。通过对半焦组成、孔隙结构、有机官能团、碳化学结构及半焦微晶结构分析,获得了不同低温热解工艺半焦的组成及微观结构特点,明确了组成及微观结构与燃烧性能之间的关系。结果表明,不同热解工艺半焦的组成和微观结构差异明显,其对半焦的燃烧性能影响显著。干熄焦碳化学结构缺陷比例大,快速热解半焦孔隙结构发0达、挥发分高,与水喷焦相比水泡焦石墨化程度低;水喷焦燃烧性能优于水泡焦,干法所得半焦的燃烧性优于湿法;半焦的挥发分含量决定其燃点,在快升温速率条件下孔隙结构对半焦的燃烧性能影响较大,而慢升温速率条件下有序化度对半焦的燃烧性能影响较大。     

火焰燃烧微压振动与燃烧状况的工业实验

介绍了在陕西钢厂进行的燃气及燃油火焰燃烧微压振动与燃烧状况的工业性实验，结果为：火焰燃烧微压振动功率谱的分布特性与燃烧状况有对应关系；工业所需的缓慢稳定燃烧功率谱趋向于低频区。