高炉鼓风机风量风压控制系统改造项目的分析与研究

介绍了高炉鼓风机风量风压控制系统改造项目,包括改造目的、改造方案、改造内容、改造的实施过程.分析了改造实施过程中存在的问题,项目技术重点、难点、创新点、技术目标完成情况,并对改造后的经济效益分析及推广应用前景进行了探讨.     

铝冶炼多功能天车的大修及改造分析

叙述铝冶炼多功能天车的大修及改造现状(包括改造内容、流程及改造风险等),分析国内外多功能天车改造项目发展方向和市场未来改造需求。     

应用高压变频技术改造烟气净化系统风机的实践

本文通过对某炭素厂净化车间4台主排风机的高压变频节能改造的介绍，详细叙述了改造的目的、技术方案、改造过程、原理特性及改造效果。     

高压变频器在炼轧厂脱硫除尘风机上的应用

通过对酒钢宏兴炼轧厂脱硫除尘风机的高压变频节电改造的介绍,详细叙述了改造的目的、技术方案、改造过程。分析了改造效果及效益评价。最后阐明节能改造的意义。     

推焦车平煤系统的改造

本文简要介绍4.3米焦炉推焦车平煤杆的改造内容、原理、改造方法,以及改造后所产生的显著效益。     

2050热轧厚规格横切线的技术改造

主要论述了某2050热轧厂厚规格横切线改造前状况及存在的主要问题、改造后生产工艺及其先进性、改造方案及改造后机组特点。     

采用合同能源管理(EMC)模式实施节能改造的实践

简述了合同能源管理模式的概念和特点,以柳钢实施的变频节能改造、水系统节能改造、照明节能改造等介绍了应用合同能源管理模式实施节能改造的效果,并对采用该模式实施节能改造提出建议。     

充装站的系统改造工程分析

以马钢气体公司充装站的系统改造工程为例,介绍了充装站的系统改造工程的设备、工艺配管、试车前的准备工作,以改造工程施工中遇到的问题,简单总结系统改造工程一些经验和教训。     

耐火材料自动化配料系统的改造建设

结合我国耐火材料现状,对配料系统进行自动化改造的目标进行阐述,详述了现场设备、配料工艺、控制系统等方面的具体改造要求。说明了自动化改造后配料系统所能达到的效果,并对改造后的效果进行说明。为耐火材料配料系统的自动化改造提供了新的思路。     

2000热轧机压下系统的技术改造

介绍2000热轧机压下控制系统改造的要求、功能及其改造方案，改造后提高了控制精度、生产效率和产品质量，取得了良好的经济效益。     

焦炉的热态修理技术

对焦炉的热态修理技术进行了分析。针对国内工业炉窑的维修状况,结合宝钢一体化的进程,提出了专业化集中维修工业炉窑的思路。     

浅谈旧水泥砼路面病害处治措施

对旧水泥砼路面病害进行了归类,分析了病害产生的原因,并提出了相应的处治措施．     

广钢线材400机列检修实践的启迪

本文介绍４００机列大修中存在的问题，采取的措施，使设备能够正常运行，满足生产的需要，为今后的检修工作，提供借鉴。     

空气提升机输料管粘接修补应用

本论述了空气提升机输料管弯头破损的原因及采用新技术修补输料管的方法，提高使用寿命，彻底治漏，取得了显成效。     

Progress in the application of cold gas dynamic spraying to repairing continuous casting molds

A new continuous casting mold repairing method—cold gas dynamic spraying (CGDS) is introduced.The study investigates the advantages of the CGDS process regarding repairing operation,such as convenient,in-situ repairation,little heat delivery,microstructural and dimensional stability and other special applications.Microstructure and mechanical properties of the copper alloy coating,nickel coating,ceramic composite coating,and their interface to the substrates,which are usually used in repairing operation have been researched by means of optical microscopy (OM),scanning electron microscopy (SEM),transmission electron microscopy (TEM) and micro-hardness tests.Experimental results have demonstrated the relative density of the copper alloy coating is as high as 98.7%,and that no obvious difference can be observed between the CrZrCu substrate and the Cu alloy coating in terms of microstructures; thus the interface is quite difficult to be identified.The bonding strength and micro-hardness of the Cu alloy coating reach up to 37 MPa and 310 HV0.2,respectively.The interface between the copper alloy coating and the nickel coating is either zigzag or wave shaped,and the cohesion is relatively good.As-sprayed nickel coating is dominated by severely deformed particles,and the relative density is up to 98.5%.Complete recrystallization occurred after annealing at 900℃ for one hour,while its micro-hardness remains as high as 124.1 HV0.2.All these results have indicated that CGDS is a promising technology for repairing the continuous casting mold and that its future development is prosperous as well.     

Progress in the application of cold gas dynamic spraying to repairing continuous casting molds

A new continuous casting mold repairing method-cold gas dynamic spraying(CGDS)is introduced.The study investigates the advantages of the CGDS process regarding repairing operation,such as convenient,in-situ repairation,little heat delivery,microstructural and dimensional stability and other special applications.Microstructure and mechanical properties of the copper alloy coating,nickel coating,ceramic composite coating,and their interface to the substrates,which are usually used in repairing operation have been researched by means of optical microscopy(OM),scanning electron microscopy(SEM),transmission electron microscopy(TEM)and micro-hardness tests.Experimental results have demonstrated the relative density of the copper alloy coating is as high as 98.7%,and that no obvious diflference Can be observed between the CrZrCu substrate and the Cu alloy coating in terms of microstmctures;thus the interface is quite difficult to be identified.The bonding strength and micro-hardness of the Cu alloy coating reach up to 37 MPa and 310 HV0. 2,respectively.The interface between the copper alloy coating and the nickel coating is either zigzag or wave shaped,and the cohesion is relatively good.As-sprayed nickel coating is dominated by severely deformed particles,and the relative density is up to 98.5%.Complete recrystallization occurred after annealing at 900℃ for one hour,while its micro-hardness remains as high as 124.1HV0.2. All these results have indicated that CGDS is a promising technology for repairing the continuous casting mold and that its future development is prosperous as well.     

辊轴自动堆焊机的设计与制作

介绍自制辊轴自动堆焊机的设计与制作.     

Histological study on repairing experimental pulp chamber floor perforations with yunnan bai-yao in dog

Yunnan Baiyao (YNBY), amalgam, hydroxylapatite and calcium hydroxide were used separately in repairing the experimental pulp chamber floor perforation (PCFP) of dog teeth. The animals were killed at the time of 1, 4, 8 and 12 weeks after experiment. The experimental teeth with periapical tissue were removed and observed their histological changes by optical microscope. The effects that different materials in repairing the tissue of PCFP were observed. Twenty teeth were taken from every dog, each group contained four teeth, the others were used for control group. Results: In initial period (1st, 4th week) inflammatory infiltration was present in PCFP of every group, but the group with YNBY was milder. Pyogenic foci were present in the hydroxylapatite and calcium hydroxide groups. In late stage of experiment (8th and 12th week) inflammatory reactions of each group were alleviated except control group. Epithelial metaplasia and cicatritation were found in the vicinity of perforated area. Dentin cementum and alveolar bone were absorbed in majority of experimental group. It was also observed in the group with YNBY. But in late stage similar cementum formation and alveolar bone neogenesis were found in the perforated area around the repairing materials. It revealed that hemostasis, Promoting Blood Circulation to Remove Stasis and antiphlogistic actions were advantageous to the inflammation, control and repair course of the PCFP. The article discussed that YNBY might promote the repairing of cementum and alveolar bone of perforated area.     

焦炉炭化室墙熔洞形成的原因分析与热修

文章针对包钢焦化厂4座老焦炉多年来的生产情况,分析其中3座超期服役焦炉出现熔洞的原因;根据熔洞的形状结构,总结了一套行之有效的骨料法熔洞热修补技术,对提高焦炉炭化室墙熔洞热修补质量和促进焦炉热修技术的发展均有着广泛的意义。     

韶钢1号高炉开炉快速高产实践

韶钢1号高炉大修后,由于开炉工作准备充分精心部署,通过充分应用高炉开炉操作技术,合理控制高炉煤气流的分布,运用快速加风降硅措施,成功地实践了高炉大修后开炉快速高产技术.