“十五”期间我国主要民用新建工程用钛量调查

叙述了“十五”期间我国主要民用新建工程用钛量的调查结果。在此期间，各主要工程的用钛量为12170t。     

“十五”期间我国主要民用新建工程用钛量调查

叙述了“十五“期间我国主要民用新建工程用钛量的调查结果.在此期间,各主要工程的用钛量为12 170t.     

矿化剂对钛石膏的改性研究

钛石膏为硫酸法钛白生产过程中的副产品,主要物相为二水硫酸钙,少量物相为白云石。钛石膏中主要杂质为:Fe_2O_3、Al_2O_3、SiO_2、MgO和TiO_2,这些杂质会影响钛石膏的凝结性能,降低钛石膏的凝结强度。为了提高钛石膏的凝结强度,选择矿化剂对钛石膏进行改性,选择的矿化剂主要为:硅酸盐水泥熟料、硅微粉和粉煤灰,改性效果排序为:硅酸盐水泥熟料硅微粉粉煤灰。通过正交试验研究了矿化剂复配对钛石膏改性的影响,在本次试验条件下,最优复配配方为:硅酸盐水泥熟料配入量16%;硅微粉配入量6%;粉煤灰配入量3%。     

钛石膏在烧结砖中的应用研究

钛石膏为硫酸法钛白生产过程中的副产品,每生产1 t钛白会产出4~5 t钛石膏。将钛石膏进行预处理后作为黏结剂加入以煤矸石为主要原料的烧结砖中,有效解决了钛石膏堆存和环境污染问题。通过条件试验和正交试验,研究了煅烧温度、黏土添加量、钛石膏添加量和高温保温时间对强度的影响。条件试验表明:烧结砖强度随黏土配入量、煅烧温度和高温保持时间增加而增加,随钛石膏加入量增加而降低。正交试验表明:在黏土添加量相对稳定(20%左右)的条件下,其余3因素对烧结砖强度影响大小依次为:钛石膏添加量高温保温时间煅烧温度。最佳参数分别为:钛石膏的添加量14%,高温保温时间8 h,煅烧温度1 000℃。     

Fe(OH)3对石膏增强剂提高钛石膏力学性能的影响

以钛石膏为主要原料,Fe(OH)_3和石膏增强剂(主要成分为聚羧酸醚)为变量,结合XRD、SEM分析,研究Fe(OH)_3对石膏增强剂提高钛石膏力学性能的影响。试验结果表明:随着钛石膏中Fe(OH)_3含量增加,石膏增强剂提高钛石膏力学性能的效果显著降低。用不含Fe(OH)_3的脱硫石膏替换部分钛石膏,随着石膏增强剂掺量的增加钛石膏力学性能显著提高。石膏增强剂的适宜掺量为0.07%～0.11%。当掺量为0.09%时,钛石膏2 h抗折、抗压强度比没添加增强剂的钛石膏提高18%、25%,达到《建筑石膏》(GB/T 9776—2008)1.6等级。     

高钛重矿渣纤维混凝土力学性能试验研究

考虑纤维掺量、水胶比和粉煤灰掺量3个主要因素,采用正交试验设计20组高钛重矿渣纤维混凝土试件,结合SEM分析研究纤维掺量、水胶比等因素对高钛重矿渣纤维混凝土力学性能的影响。试验结果表明:水胶比对高钛重矿渣混凝土的抗折与抗压强度影响最大;玄武岩纤维可以显著提高高钛重矿渣混凝土抗折强度,塑钢纤维可以明显提高高钛重矿渣混凝土抗压强度。当水胶比为0.32,玄武岩纤维掺量1 kg,粉煤灰掺量5%时,高钛重矿渣纤维混凝土抗折强度为5.61 MPa,比未掺纤维的高钛重矿渣混凝土提高10%。当水胶比为0.34,塑钢纤维掺量2 kg,粉煤灰掺量5%时,高钛重矿渣混凝土的抗压强度为60.45 MPa,达到GB50010—2010《混凝土结构设计规范》规定的C55等级。     

容器用钛的性能要求

1 容器用钛的概念钛材的应用很广泛,主要用于两方面:一方面为航空、航天、航海,主要利用钛材低的相对密度及高的比强度,一般称为军用;另一方面为化工过程设备,主要利用钛材优良的耐蚀性能,一般称为民用.民用钛材有3/4用于容器(包括换热器),军用钛材也有少量用于容器.我国绝大部分钛材属民用,此处的容器用钛也主要讨论民用.尽管绝大部分容器都用钢制,钛制容器仅占容器量的很小     

钛建材及表面处理技术

介绍了钛材在建筑物防酸雨，耐海洋气候等方面的性能；举例介绍了钛材在建筑上的应用以及建筑物对钛表面的要求，钛建材的表面处理方法主要是光整轧制法，酸洗法，复合法，喷砂法和着色法等5种工艺，列举也世界上使用钛建材的主要建筑物的钛材用量和表面处理方法。     

无取向硅钢钢液增钛原因分析

对无取向硅钢炼钢全流程钢液增钛的原因进行了分析,认为铁水钛含量、转炉出钢温度、转炉下渣量、精炼渣TiO2含量、钢水罐及RH浸入管混钢种生产是影响钢液增钛的主要原因.通过采取低钛铁水冶炼,减少转炉下渣量,提高出钢温度,添加白灰改质精炼渣等措施,均能够降低钢液中的钛含量.     

商业飞机用钛市场回顾及展望

正本文对近期主要商业航空公司大事件及其同钛生产商的新合作关系进行了简要回顾。依据主要商业航空市场的发展及变化,展望未来商业飞机的交付量、商业飞机用钛市场及航空用新制造材料的变化。世界航空用钛市场主要集中在美国、俄罗斯、欧洲等国家和地区。2013年商业飞机机身用钛需求约为6100万磅,预计2014年将增至7400万磅。虽然新发动机用钛需求的增长率增加2倍,但年增速将放     

Advances in Organolanthanide Chmistry in China

ＡｄｖａｎｃｅｓｉｎＯｒｇａｎｏｌａｎｔｈａｎｉｄｅＣｈｍｉｓｔｒｙｉｎＣｈｉｎａＳｈｅｎＱｉ（沈琪）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＳｕｚｈｏｕＵｎｉｖｅｒｓｉｔｙ，Ｓｕｚｈｏｕ２１５００６，Ｃｈｉｎａ）Ｒｅｃｅｉｖｅｄ：Ａｐｒｉｌ２...     

风吹石墨在莱钢6m焦炉的应用

针对石墨在焦炉内的生成机理,对莱钢7号、8号焦炉炉墙上的石墨采用压缩空气进行吹扫,有效控制了石墨的生长速度,降低了劳动强度。     

浅谈博茨瓦纳某工程项目管理经验和总结

以博茨瓦纳某地方法院工程为例，简要介绍了在非洲承揽工程项目的管理经验和总结。     

武钢炼焦技术进步

介绍武钢焦化公司50年来炼焦技术进步,重点阐述炼焦配煤技术研究、焦炉热修补维护、140t／h干熄焦技术消化以及7．63m特大型焦炉的技术创新。     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Trends in Temperature Extremes in Association with Weather-Intraseasonal Fluctuations in Eastern China

Trends in the frequencies of four temperature extremes (the occurrence of warm days, cold days, warm nights and cold nights) with respect to a modulated annual cycle (MAC), and those associated exclusively with weather-intraseasonal fluctuations (WIF) in eastern China were investigated based on an updated homogenized daily maximum and minimum temperature dataset for 1960-2008. The Ensemble Empirical Mode Decomposition (EEMD) method was used to isolate the WIF, MAC, and longer-term components from the temperature series. The annual, winter and summer occurrences of warm (cold) nights were found to have increased (decreased) significantly almost everywhere, while those of warm (cold) days have increased (decreased) in northern China (north of 40°N). However, the four temperature extremes associated exclusively with WIF for winter have decreased almost everywhere, while those for summer have decreased in the north but increased in the south. These characteristics agree with changes in the amplitude of WIF. In particular, winter WIF of maximum temperature tended to weaken almost everywhere, especially in eastern coastal areas (by 10%-20%); summer WIF tended to intensify in southern China by 10%-20%. It is notable that in northern China, the occurrence of warm days has increased, even where that associated with WIF has decreased significantly. This suggests that the recent increasing frequency of warm extremes is due to a considerable rise in the mean temperature level, which surpasses the effect of the weakening weather fluctuations in northern China.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.