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Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace:Behavior analysis and mechanism evolution

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 282-291页

作者： Jinge Feng Jue Tang Zichuan Zhao Mansheng Chu aijun Zheng Xiaobing Li Xiao’ai wang School of Metallurgy Northeastern UniversityShenyang 110819China Institute for Frontier Technologies of Low-carbon Steelmaking Northeastern UniversityShenyang 110819China Liaoning Low-carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education Shenyang 110819China Zhang Xuan Technology of HBIS Group Co. Ltd.Shijiazhuang 050000China Xuanhua Iron and Steel Group Co. Ltd.Shijiazhuang 050000China Iron and Steel Research Institute of HBIS Group Co. Ltd.Shijiazhuang 050000China

Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of vanadium-titanium ***,in this process,the sticking of pellets occurs due to the aggregation of metal-lic iron between the contact surfaces of adjacent pellets and has a serious negative effect on the continuous *** paper presents a detailed experimental study of the effect of TiO2 on the sticking behavior of pellets during direct reduction under different *** showed that the sticking index(SI)decreased linearly with the increasing TiO2 *** phenomenon can be attributed to the increase in unreduced FeTiO3 during reduction,leading to a decrease in the number and strength of metallic iron interconnections at the sticking *** the TiO2 addition amount was raised from 0 to 15wt%at 1100°C,the SI also increased from 0.71%to 59.91%.The connection of the slag phase could be attributed to the sticking at a low reduction temperature,corresponding to the low sticking ***,the interconnection of metallic iron became the dominant factor,and the SI increased sharply with the increase in re-duction ***2 had a greater effect on SI at a high reduction temperature than at a low reduction temperature.

关键词： titanium sticking index hydrogen metallurgy direct reduction pellets

Sedimentary microfacies of Member 5 of Xujiahe Formation in the Dongfengchang area, Sichuan Basin

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PETROLEUM RESEARCH 2024年第3期9卷 481-488页

作者： Huang, Yanqing wang, Jian Liu, Junlong Duan, Nan Xiao, Kaihua Qiao, Dawei Li, Yan wang, ai Sinopec Petr Explorat & Prod Res Inst Beijing 100083 Peoples R China Sinopec Southwest Oil & Gas Co Chengdu 610095 Sichuan Peoples R China

Member 5 of the Upper Triassic Xujiahe Formation (T3X5) in central Sichuan Basin has made a breakthrough in exploration recently. However, this new stratum has not been investigated sufficiently with respect to basic geology, making its types and distribution of sedimentary facies unclear, which severely restricts its subsequent exploration evaluation. In this study, types of sedimentary microfacies in the first sand group of T3X5 (T3X51) are clarified through core observation and logging interpretation using core, log and seismic data, and then distribution of sedimentary microfacies in T(3)X(5)(1 )is determined according to seismic waveform features and seismic prediction. The results show that T(3)X(5)(1 )in the Dongfengchang area is mainly composed of deltaic deposits of several microfacies, such as delta front underwater distributary channel, sheet sand, and interdistributary bay. On seismic sections, different microfacies are significantly different in waveform features, the underwater distributary channel is characterized by one trough between two peaks, while diversion bay exhibits chaotic reflections between T6 and T-5(1). The sedimentary microfacies varied greatly during the depositional period of T(3)X(5)(1)in the Dongfengchang area, this is because that the sediment supply was mainly controlled by the southwest and southeast provenance regions. Three superimposed underwater distributary channels are developed in the Dongfengchang area. The phase-1 superimposed underwater distributary channel in the northwest transition to sheet sand in the northeast, the phase-2 superimposed underwater distributary channel in the south extends shortly, the phase-3 superimposed underwater distributary channel in the northeast has a large development scale. These research findings are helpful to guide the subsequent exploration of T3X5 gas reservoir and also theoretically significant for investigating the depositional evolution of the Xujiahe Formation in central Sichuan B

关键词： Seismic facies Sedimentary microfacies Xujiahe formation Upper triassic Dongfengchang area Central Sichuan Basin

Genetic mechanisms of high-quality tight siliciclastic reservoirs:A case study from the Upper Triassic Xujiahe Formation in the Yuanba area,Sichuan Basin,China

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Energy Geoscience 2024年第3期5卷 151-162页

作者： ai wang Junlong Liu Zhongqun Liu Kaihua Xiao Yanqing Huang Lingxiao Fan Jitong Li Petroleum Exploration and Production Research Institute SINOPECBeijing100083China

This study analyzed the petrological characteristics,diagenesis,pore types,and physical properties of the tight coarse-grained siliciclastic sequences in the third member of the Upper Triassic Xujiahe Formation(also referred to as the Xu-3 Member)in the western Yuanba area in the northeastern Sichuan Basin,China,based on the results of 242.61-m-long core description,292 thin-section observations,scanning electron microscopy(SEM),and 292 physical property *** types and genetic mechanisms of high-quality tight coarse-grained siliciclastic reservoirs in this member was determined *** research objective is to guide the exploration and development of the tight coarse-grained siliciclastic sequences in the Xu-3 *** results of this study are as *** types of high-quality reservoirs are developed in the coarse-grained siliciclastic sequences of the Xu-3 Member,namely the fractured fine-grained sandy conglomerate type and porous medium-grained calcarenaceous sandstone *** energy in the sedimentary environment is the key factor controlling the formation of high-quality *** high-quality reservoirs are developed mainly in the transitional zone with moderately high hydrodynamic energy between delta-plain braided channels and delta-front subaqueous distributary *** dolomitic debris(gravel)content is the main factor affecting the reservoirs’physical *** micritic algal debris and sandy debris in the dolomitic debris(or gravels)tend to recrystallize during burial,forming intercrystalline pores *** the medium-grained calcarenaceous sandstones,intercrystalline pores in the dolomitic debris are formed at the early diagenetic stage,and a pore system consisting of structural fractures connecting intergranular pores,intergranular dissolution pores,and kaolinite intergranular micropores is developed at the late stage of *** formation of intercrystalline pores in dolomite gravels and gravel-edge f

关键词： Tight siliciclastic rock High-quality reservoir Genetic mechanism Xujiahe Formation Northeast Sichuan

氯丁橡胶材料在减振方面的摩擦性能与力学性能研究

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塑料科技 2024年第9期52卷 68-72页

作者：王爱敏湖州职业技术学院浙江湖州313000

橡胶材料是重要的减振制品原料之一,其反应活性较高,需通过硫化过程明显改善材料性能。相较于乳液加氢法、溶液加氢法和乙烯-丙烯腈共聚法制备的丁腈橡胶材料,以自由基乳液聚合技术制备的氯丁橡胶(CR)材料具备更优越的硫化性能。文章以... 详细信息

橡胶材料是重要的减振制品原料之一,其反应活性较高,需通过硫化过程明显改善材料性能。相较于乳液加氢法、溶液加氢法和乙烯-丙烯腈共聚法制备的丁腈橡胶材料,以自由基乳液聚合技术制备的氯丁橡胶(CR)材料具备更优越的硫化性能。文章以黄原酸调节型、硫醇调节型、硫黄调节型CR材料硫化胶为基体,探究CR材料在减振方面的门尼黏度、门尼焦烧时间、硫化特性、摩擦性能、力学性能和减振性能。结果表明:在减振方面,硫黄调节型CR材料硫化胶的门尼黏度、硫化程度、加硫指数、交联密度、拉伸强度、拉断伸长率、硬度、撕裂强度、回弹性指标值均最大,但门尼焦烧时间、门尼硫化时间、焦烧时间最短,存在较大加工安全隐患。黄原酸调节型CR材料硫化胶的拉伸强度、拉断伸长率、硬度和撕裂强度力学性能指标均适中。硫醇调节型CR材料硫化胶的平均摩擦系数最大,脆性温度最低,动静刚度比值最小,具有较好的耐磨性、耐寒性及减振性能。因此,深度分析CR材料在减振方面的摩擦性能与力学性能,可为电梯领域震动控制技术升级提供有益参考。

关键词：氯丁橡胶材料摩擦性能力学性能硫化特性

基于互信息量均方差提取关键帧的激光视频图像检索研究

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激光杂志 2024年第3期45卷 145-149页

作者：胡秀王书爱荆楚理工学院湖北荆门448000

为保证激光视频图像检索结果中不存在重复性冗余图像,提出了基于互信息量均方差提取关键帧的激光视频图像检索方法。基于互信息量均方差的关键帧提取方法,以激光视频图像颜色的互信息量均方差最大化,为激光视频图像关键帧的聚类中心设... 详细信息

为保证激光视频图像检索结果中不存在重复性冗余图像,提出了基于互信息量均方差提取关键帧的激光视频图像检索方法。基于互信息量均方差的关键帧提取方法,以激光视频图像颜色的互信息量均方差最大化,为激光视频图像关键帧的聚类中心设置标准,以此聚类提取不重复的视频图像关键帧;通过基于关键帧的激光视频图像检索方法,将所提取关键帧作为激光视频图像检索的核心判断内容,提取与所需图像关键帧相似度显著的激光视频图像,完成激光视频图像检索。实验结果显示:此方法使用后,提取的激光视频图像关键帧冗余度仅有0.01,激光视频图像检索结果的MAP指标测试值高达0.98,检索结果中不存在重复性冗余图像。

关键词：互信息量均方差提取关键帧激光视频图像检索聚类算法

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硝基化合物均相催化氢化研究进展

有机化学 2024年第4期44卷 1094-1105页

作者：侯梦莹王爱娥黄培强厦门大学化学化工学院化学系、福建省化学生物学重点实验室福建厦门361005

胺类化合物,特别是伯胺,是一类重要的化工中间体,常用于药物、农药、染料以及各种精细和特殊化学品的合成.硝基化合物还原是工业中生产伯胺,特别是苯胺及其衍生物的重要方法.其中,催化氢化是工业上最高效、最原子经济又环境友好的还原... 详细信息

胺类化合物,特别是伯胺,是一类重要的化工中间体,常用于药物、农药、染料以及各种精细和特殊化学品的合成.硝基化合物还原是工业中生产伯胺,特别是苯胺及其衍生物的重要方法.其中,催化氢化是工业上最高效、最原子经济又环境友好的还原硝基化合物的方法.目前,硝基化合物的催化氢化主要依赖于非均相催化剂.研究者们也大多专注于非均相催化剂的发展与修饰,均相催化方法报道比较少.然而,在均相催化中,催化剂的结构很容易通过改变中心金属和配体进行调整和修饰,从而对催化过程进行调控,实现硝基化合物的高效、高选择性还原.重点从反应活性、选择性、官能团耐受性以及机理等方面,系统总结了硝基化合物均相催化氢化的发展和研究现状,探讨这一领域目前面临的挑战和未来发展方向.

关键词：均相催化氢化硝基化合物胺化学选择性

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自噬在围术期神经认知障碍中作用的研究进展

临床麻醉学杂志 2024年第2期40卷 204-208页

作者：张笑佳王春爱甘肃中医药大学第一临床学院兰州市730030 甘肃省中医院麻醉科

围术期神经认知障碍常表现为患者记忆力受损及精神错乱,住院时间延长,预后不良以及死亡率上升等。自噬与围术期神经认知障碍的发病密切相关,药物、衰老、炎症等可通过调控mTOR、FOXO1等信号转导通路影响自噬水平,参与围术期神经认知障... 详细信息

围术期神经认知障碍常表现为患者记忆力受损及精神错乱,住院时间延长,预后不良以及死亡率上升等。自噬与围术期神经认知障碍的发病密切相关,药物、衰老、炎症等可通过调控mTOR、FOXO1等信号转导通路影响自噬水平,参与围术期神经认知障碍的发病过程。自噬通过调节神经炎症的发生,α-突触核蛋白、τ蛋白代谢等在改善术后认知障碍和学习记忆功能方面发挥重要作用。本文就调控自噬的主要通路及自噬在围术期神经认知障碍发生发展中的作用进行综述,以期为围术期神经认知障碍的发病机制寻求新的靶点和思路。

关键词：围术期神经认知障碍麻醉自噬

地缘政治风险冲击与金融市场的风险溢出效应——基于QVAR-DY溢出指数的分析

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现代财经（天津财经大学学报） 2024年第11期 76-93页

作者：王璟怡王爱俭柳玉淼天津财经大学金融学院天津300222

近年来,全球地缘政治风险频发,全球金融市场的稳定性遭受巨大挑战。充分理解地缘政治风险对金融市场的冲击,对制定有效的风险管理策略至关重要。本文旨在探讨地缘政治风险对中国货币市场、股票市场、外汇市场和债券市场的风险溢出效应,... 详细信息

近年来,全球地缘政治风险频发,全球金融市场的稳定性遭受巨大挑战。充分理解地缘政治风险对金融市场的冲击,对制定有效的风险管理策略至关重要。本文旨在探讨地缘政治风险对中国货币市场、股票市场、外汇市场和债券市场的风险溢出效应,特别是在不同市场状态下的表现。通过选取2007年10月至2023年3月的数据,采用QVAR-DY溢出指数的方法进行研究。静态分析结果表明,市场衰退期,地缘政治风险对股票市场的风险溢出最大,而市场高涨期,地缘政治风险对外汇市场的影响最大;动态分析结果发现,地缘政治冲击在市场高涨期对股票市场影响最大,而在市场衰退期对货币市场影响更大。因此,监管主体应实施差异化的风险管理策略,在市场高涨期重点关注股票市场风险,而在市场衰退期重点关注货币与外汇市场风险,防止地缘政治风险冲击对国内金融系统产生过度影响,进而守住不发生系统性金融风险的底线。

关键词：地缘政治风险风险溢出金融市场 QVAR-DY溢出指数

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宋代陶瓷“开光”装饰的设计应用解析

中国陶瓷 2024年第3期60卷 95-103页

作者：王爱红李委委景德镇陶瓷大学景德镇333000 山东农业工程学院济南250000

“开光”装饰发展到宋代已演变成独立简洁的开光形式,并形成自律性发展的特点。“开光”装饰在宋代陶瓷中应用广泛,形式多样,开创了独特的设计应用。宋代发达的商业环境,陶瓷成为国内外消费的大宗商品,在此背景下宋代陶瓷“开光”装饰... 详细信息

“开光”装饰发展到宋代已演变成独立简洁的开光形式,并形成自律性发展的特点。“开光”装饰在宋代陶瓷中应用广泛,形式多样,开创了独特的设计应用。宋代发达的商业环境,陶瓷成为国内外消费的大宗商品,在此背景下宋代陶瓷“开光”装饰的设计应用体现出追逐高效设计和批量化生产的特征。在装饰构图方面,宋代陶瓷的开光采用“构框”和“填补”的装饰程序,有效减少了在装饰过程中所花费的心智和预见力。在装饰主题方面,宋代陶瓷开光装饰广泛借鉴同时期姊妹艺术资源,运用“粉本”的设计方式,根据陶瓷器物的工艺特点、装饰题材灵活应用,使“粉本”图式在创作过程中不断更新与修正。在样式设计方面,宋代陶瓷开光装饰开创了双重“模件”体系,通过开光外廓模件与廓内母题模件之间的相互组合、置换,以及模件的增殖和重复应用,实现单元的不断变换与衍生,形成样式化设计。

关键词：宋代陶瓷开光装饰设计应用