麻石烟气脱硫装置耐酸胶泥的研究

本文通过对用于麻石烟气脱硫装置的3#和2#耐酸胶泥的单因素对比试验的研究,得出2#胶泥耐酸度较好,因而防腐性能也较好。这不仅回收了固废,而且还具有可观的环境效益。     

硅酸钾胶泥低温固化性能的研究

本文综述了国内现有的硅酸盐耐酸耐热胶泥的发展过程，对其进行了简单的比较；并针对硅酸盐耐酸耐热胶泥在低温（15℃）以上固化慢的问题，研究开发了可在-5℃-15℃正常固化的耐酸酸热胶泥，对其低温固化性能、物理力学性能及收缩性能进行了详细研究。     

单组分耐酸耐热胶泥的研制

研制的ＨＰ胶泥是一种单组份，无卤素，自固化的耐酸耐热胶泥，测定了其技术在性能并与国内外同类胶泥进行了对比，结果表明，ＨＰ胶泥性能优越，使用方便，施工后无需酸化处理，作为一种新型耐腐蚀材料，具有广阔的应用前景。     

大型硫酸吸收塔耐蚀衬里防护施工应用

介绍了大型硫酸吸收塔采用石棉作隔离层,以钾水玻璃耐酸胶泥砌半耐酸瓷砖的防护方案,并介绍了ＫＰ１胶泥性能,总结了相关的施工方法和经验。     

低温固化耐酸耐热胶泥的研制

针对硅酸盐耐酸耐热胶泥在低温(15℃)以下固化慢的问题,开发了可在-5～15℃正常固化的耐酸耐热胶泥,对其低温固化性能、物理力学性能及收缩性能进行研究.     

浅谈特高温烟道烟囱的防腐(一)

本文主要从技术角度对目前市场上特高温烟道烟囱各种防腐方案进行了对比,主要涉及有:乙烯基酯树脂玻璃鳞片胶泥、乙烯基酯树脂胶泥玻璃钢复合、乙烯基酯树脂胶泥勾缝砖板衬里(含泡沫玻化砖、耐酸砖、耐酸陶瓷等方案)、耐酸KPI胶泥、KPI胶泥勾缝砖板衬里、OM涂料、钛合金复合合金板、"混元体"方案、环硅聚合物杂化方案、萨维真柔性喷涂内衬方案、PFA可焊接聚四氟乙烯塑料内衬、玻璃钢挂片拼接方案、整体玻璃钢方案等。     

耐酸胶泥在脱硫烟囱防腐中应用可行性初探

结合一失败案例,探讨了耐酸胶泥内衬在脱硫烟囱排烟筒中使用的技术可行性,从设计,施工,材料特性等方面进行了分析,得出了耐酸胶泥内衬在脱硫后的湿烟囱排烟筒中需要慎重使用的结论。     

单组份硅酸钠耐酸胶泥的研究

对用于麻石烟气脱硫装置的单组份硅酸钠耐酸胶泥进行了试验研究,得到的该单组份胶泥综合性能符合国家标准,因而具有良好的耐蚀耐磨性能。另外,该胶泥价格低廉,填料来源丰富。     

脱硫后烟囱内壁防腐蚀材料选择和施工方法

电厂湿法脱硫后,烟囱内部的腐蚀状况非常恶劣。本文介绍了脱硫后烟气的腐蚀性,并介绍了适合钢筋混凝土烟囱改造的四种防腐内衬材料,即发泡耐酸玻璃砖、VEGF玻璃鳞片胶泥、SL300特种耐酸胶泥和防腐涂料。对这四种材料的优缺点、使用方法、实际应用状况等分别进行了介绍,并对多种烟囱防腐蚀措施的经济性进行了比较。     

酚醛树脂胶泥在防腐工程中的配制及应用

化工生产腐蚀介质较多，特别是酸性介质对设备腐蚀尤其严重。为了保持设备的效能，防止酸、碱、盐类的侵蚀，每年大修中都要投入大量的人力和物力。酚醛树脂胶泥是一种优良的耐酸冷硬化耐腐蚀材料，它不仅可用作塑料、橡胶衬里的胶合剂，而且还可供耐酸衬里作填缝之用。除...     

凝石混凝土的抗氯离子渗透性能研究

由钢筋锈蚀导致的混凝土结构耐久性问题受到越来越多的关注，而氯离子是造成钢筋锈蚀的主要原因。采用ASTMC1202推荐的快速试验方法对比测定了氯离子在凝石混凝土和水泥混凝土中的渗透能力，结果表明：凝石混凝土的抗氯离子渗透性能优于水泥混凝土，其机理在于凝石混凝土的孔结构优于水泥混凝土及凝石对氯离子较强的固化能力。     

矿渣微粉对水泥砂浆强度和抗酸雨侵蚀性能的影响

研究了矿渣微粉对水泥砂浆的流动度、强度以及抗模拟酸雨侵蚀性能的影响。在试验条件下,随着矿渣微粉掺量的不断增加,砂浆的流动度得到改善,强度逐渐上升,而且各不同矿渣微粉掺量的砂浆试件在清水中养护的抗压强度值在后期有逐渐接近的趋势;不同掺量的矿渣微粉等量取代水泥,经pH值为4.0的模拟酸雨干湿交替循环腐蚀后的试件强度均高于同等条件下纯水泥砂浆试件的强度,即矿渣微粉对水泥砂浆试件在模拟酸雨条件下保持其强度不变的能力有改善作用。     

Properties of metallic cements formed upon the interaction of mechanochemically synthesized copper alloys with liquid gallium and its eutectics: Interaction of Cu/Bi composites with liquid gallium

Atomic force microscopy and scanning electron microscopy were used to study the structure of metallic cements that are formed upon the interaction of Cu/Bi mechanocomposites with liquid gallium at room temperature. It has been established that the intermetallic compound CuGa₂, which is the basic component of this metallic cement, is formed as tetragonal crystals 1–4 μm in size with a characteristic layeredspiral growth. The second phase—bismuth—is adsorbed at the growth steps in the form of disperse formations 70–250 nm in size; local bismuth accumulations of micron size are also observed. It is shown that in the metallic cement that is formed at room temperature regions of incompletely reacted Cu/Bi composite are retained.     

不同pH值的浸泡液对水门汀溶解性的影响

选用人工唾液、去离子水和乳酸3种不同pH值的浸泡液模拟人体口腔环境,将玻璃离子水门汀、聚羧酸锌水门汀和磷酸锌水门汀分别浸泡7 d.采取Paffenbarger重量法测定水门汀浸泡前后质量的改变,计算材料的溶解率.结果表明:玻璃离子水门汀在人工唾液、去离子水和乳酸溶液中的溶解率分别为:0.11%、0.14%、1.68%;聚羧酸锌水门汀为:0.48%、0.59%、2.80%;磷酸锌水门汀为:0.67%、1.01%、3.02%;3种水门汀溶解性大小为:玻璃离子水门汀＜聚羧酸锌水门汀＜磷酸锌水门汀.各浸泡液中,3种水门汀之间的溶解率有显著差异(P＜0.05);玻璃离子水门汀在去离子水和人工唾液中的溶解率无显著差异(P＞0.05),并保持较低的溶解率,其他2种水门汀在3种浸泡液中的溶解率都有显著差异(P＜0.05);3种水门汀在乳酸溶液中的溶解率都明显高于其他2种浸泡液中的溶解率(P＜0.05),而且磷酸锌水门汀的溶解率明显高于其他2种水门汀.3种水门汀在不同pH值下溶解性变化规律一致,浸泡液pH值对水门汀的溶解性具有明显的影响.     

Basic properties of calcium phosphate cement containing different concentrations of citric acid solution

The properties of calcium phosphate cement consisting of α-tricalcium phosphate(α-TCP)and tetracalcium phosphate(TTCP)have been investigated by using a cement liquid that contained citric acid with concentration of 0.05mol/L or higher.The relationship between the setting time of the system cement and the concentration of citric acid solution shows concave type curve.When solution concentration was 0.2mol/L,the setting time was 8min,which was the shortes.While the relationship between 24h compressive strength of the cement and the citric acid concentration shows convex type curve.When solution concentration was 0.2mol/L,the compressive strength was 39.0MPa,which was the highest.Afterwards.the microstructure of the hardening product was observed by SEM,the effect of citric acid on the exothermic rate of hydrate reaction was studied by microcalorimeter,and the crushed specimens were subjected to X-ray diffraction.The results verified that the low citric acid concentration can accelerate the hydrate reaction rate of the α-TCP/TTCP system.However,the high citric acid concentration inhibited hydroxyapatite formation and retarded the rate of hydrate reaction of the α-TCP/TTCP cement.     

溶胶-凝胶法制备HAP骨水泥材料的研究

文章对用溶胶－凝胶法（简称SOL－GEL）烧结制备HAP骨水泥材料的工艺条件进行了研究，并探索了HAP粉剂与柠檬酸水溶液构成和凝结体系的可行性，结果显示出该材料作为医用骨水泥材料的可能性。     

Korrosionsschutz in Rohren durch Betonauskleidungen

Corrosion protection in pipelines by concrete linings Cast iron and steel pipes of various diameters may be protected against corrosion by internal linings of cement mortar. This lining results in addition in an improvement of the mechanical properties of the composit. Within 28 days the mortar cures to compressive strength between 700 to 1000 kg/cm² and tensile flex strength exceeding 100 kg/cm²; even when the metal tube is damaged a high pressure resistance is maintained. Adhesion between lining and metal improves with time: green cement is rather porous, so that water may penetrate to the metal; calcium hydroxide from the cement and ferric hydrates formed on the metal surface are incorporated in the concrete so that good adhesion results. Sulfate-resistant special grades have shown to be resistant in waste water containing up to 3000 mg/l sulfate and having pH-values down to 4,5 for short times.     

Untersuchung des chemischen und elektrochemischen Verhaltens von zementmörtelausgekleideten Stahlrohren in kohlensäurehaltigen Wässern

Investigation of electrochemical element formation by crevices of different width in cement lined steel tubes The author describes an experimental setup for the investigation of the attack of water with aggressive carbonic acid on the cement lining of steel tubes. In equilibrium waters crevices in the cement are covered by protective layers; in aggressive waters, however, there is a critical crevice width (probably 2 mm), which must not be exceeded without the danger of corrosion. When dissolved calcareous constituents aer replaced by iron oxide in the mortar the resistance of the cement is increased.     

棕刚玉熔炼系统的新设计

介绍了国内首次实现的全机械化运行的刚玉分包接液新工艺,介绍了接液包的防爆措施;废除了传统的耐火砖拱顶而采用耐热混凝土天花板热保护,节约大量投资;采用了小巧的全保温炉缸,从而使冶炼炉具有较先进的节能效果。该设计在节能、节省电极材料消耗以及劳动保护方面显示出极大的优越性。     

低铬合金耐磨球墨铸铁的研究

研究了成分、热处理的淬火介质、淬火和回火工艺对低铬合金耐磨球墨铸铁的组织与性能的影响,结果表明,低铬合金耐磨球墨铸铁具有良好的显微组织和力学性能,尤其优良的耐磨性,其耐磨性是45＃钢的3．5倍,而成本与45＃钢相近。