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钢铁厂含铁除尘灰的基本特性及应用

河南冶金 2024年第2期32卷 16-20,40页

作者：刘瑞李伟安阳钢铁股份有限公司

通过对烧结、焦化、炼铁、炼钢、轧钢等工序产生的各种含铁粉尘的成分、产量、粒度、形貌等特性进行分析,介绍了烧结除尘灰和炼钢除尘灰在钢铁厂内部自循环的综合应用。长流程炼钢除尘灰产量为70~90 kg/t钢,其中烧结、焦化、高炉、炼钢... 详细信息

通过对烧结、焦化、炼铁、炼钢、轧钢等工序产生的各种含铁粉尘的成分、产量、粒度、形貌等特性进行分析,介绍了烧结除尘灰和炼钢除尘灰在钢铁厂内部自循环的综合应用。长流程炼钢除尘灰产量为70~90 kg/t钢,其中烧结、焦化、高炉、炼钢工序的除尘灰产量分别占36.3%、7.1%、32.4%、24.2%。除尘灰冷固压球替代返矿在转炉中做冷却剂和造渣料,前期起渣、化渣效果较好,每增加1 kg/t冷固压球使用可以减少转炉钢铁料0.3~0.5 kg/t,但随着冷固压球用量增加,转炉炉渣的脱磷能力明显降低。

关键词：长流程除尘灰化学成分分布形貌

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用转炉尘泥作造渣剂的研究

钢铁 1985年第1期 28-29页

作者：李昌德魏绍武上海冶金设计研究院昆明钢铁公司炼钢厂

我国一些钢铁厂铁水含磷、矽比较高,石灰质量不够稳定,辅助造渣材料加入量大,化渣慢,不利于脱硫、去磷;而且加剧了喷溅和炉衬侵蚀,对炉衬寿命威胁很大。为了加速成渣,不得不多加萤石助熔,这样非但给提高炉龄增加了困难、更为重要的是由... 详细信息

我国一些钢铁厂铁水含磷、矽比较高,石灰质量不够稳定,辅助造渣材料加入量大,化渣慢,不利于脱硫、去磷;而且加剧了喷溅和炉衬侵蚀,对炉衬寿命威胁很大。为了加速成渣,不得不多加萤石助熔,这样非但给提高炉龄增加了困难、更为重要的是由于使用萤石,增加了氟化物气体对大气的污染。近年来在国外已广泛使用轻烧速熔石灰,促进快速成渣。我国也在这方面抓紧进行,并且引进了一些工程,但在国内外的实际生产辅助造渣材料

关键词：转炉尘泥萤石工业性非金属矿物造渣材料造渣溶剂造渣剂

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复吹转炉钢-渣间容量传质系数的水-油模型

特殊钢 2004年第2期25卷 19-21页

作者：吴伟邹宗树吴志宏李永祥郭振和东北大学材料与冶金学院沈阳110004 宝钢集团梅山有限公司南京210039

在熔池直径 880mm、深 2 5 8mm的冷态模型中 ,利用水模拟钢水、机油模拟渣、苯甲酸模拟钢渣间传输物质来研究熔池直径 5 2 85mm、深 15 4 5mm的复吹转炉吹炼工艺参数对钢渣间容量传质系数的影响。结果表明 ,枪位 35 0mm ,顶吹流量 1... 详细信息

在熔池直径 880mm、深 2 5 8mm的冷态模型中 ,利用水模拟钢水、机油模拟渣、苯甲酸模拟钢渣间传输物质来研究熔池直径 5 2 85mm、深 15 4 5mm的复吹转炉吹炼工艺参数对钢渣间容量传质系数的影响。结果表明 ,枪位 35 0mm ,顶吹流量 117m3 /h ,底吹流量 1 6 8m3 /h至 2 36m3 /h时 ,传输物质苯甲酸的容量传质系数变化最显著 ,在采用枪位 35 0mm ,顶吹流量 14 0m3 /h ,底吹流量 1 6 8m3 /h ,底枪布置方式为 8孔对称布置在 0 6 6直径的圆上时 ,传输物质的容量传质系数最大。

关键词：复吹转炉冷态模型容量传质系数工艺参数水-油模型炼钢

轧制退火工艺对高碳含量孪晶诱发塑性钢拉伸变形行为的影响

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塑性工程学报 2024年第5期31卷 64-70页

作者：黄玖龙孙威杰张岩刘帅冯运莉华北理工大学冶金与能源学院河北唐山063210 首钢京唐钢铁联合有限责任公司制造部河北唐山063210

以Fe-18Mn-1.0C高碳含量TWIP钢为研究对象,利用单向拉伸试验、光学显微镜和扫描电子显微镜研究了冷轧压下量和退火温度对高碳TWIP钢拉伸变形行为的影响。结果表明,随着压下量的增加,试验钢中产生大量变形组织,在轧制变形组织作用下,Fe-1... 详细信息

以Fe-18Mn-1.0C高碳含量TWIP钢为研究对象,利用单向拉伸试验、光学显微镜和扫描电子显微镜研究了冷轧压下量和退火温度对高碳TWIP钢拉伸变形行为的影响。结果表明,随着压下量的增加,试验钢中产生大量变形组织,在轧制变形组织作用下,Fe-18Mn-1.0C钢的屈服强度及抗拉强度显著提高但塑性降低;冷轧高碳TWIP钢拉伸过程中产生动态应变时效(DSA)现象,随着压下量的增加,锯齿幅度减弱,锯齿数量减少,DSA现象减弱;对冷轧40%试样进行不同温度的退火处理,发现随退火温度的升高,试样屈服强度降低,当退火温度超过400℃时,抗拉强度明显下降,伸长率出现先增加后降低的现象;对于高碳TWIP钢,当退火温度超过400℃时,碳化物快速析出是其抗拉强度及伸长率降低的主要原因。

关键词：孪晶诱发塑性钢高碳含量冷轧退火处理纳米孪晶

Properties change of activated co.e for sintering flue gas purification in cyclic removal of SO_(2) and NO_(x)

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Journal of iron and steel Research International 2021年第6期28卷 641-650页

作者： Sheng-li Wu wei-li Zhang Zhong-jie Hu School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing 100083China ironmaking plant Baoshan Iron and Steel Co.Ltd.Shanghai 201999China

The properties of activated co.e(AC)for sintering flue gas purification greatly affect the efficiency of desulfurization and denitration,but they gradually change during *** change in properties of co.l-based AC during cycles was studied to clarify the change law and AC optimization *** AC oxygen co.tent rapidly increases 13.49 to 17.87 wt.%in the early cycles to form phenol,which promotes the denitration rate 55.63%to 78.20%.The denitration performance slowly increases in subsequent cycles becaof the generation of quinone AC slow ***,the oxygen-co.taining groups are not co.ducive to adsorption capacity of AC for *** adsorbed NO species which can be replaced SO2 is the main NO species on AC,and its amount decreases with the decrease in CC co.tent of *** AC chemical loss leads to the opening of closed pores,expansion of original pores and formation of new pores,causing micropore volume to increase 0.085%to 0.152%,co.pressive strength to decrease 472 to 336 N,and abrasive resistance to decrease 97.87%to 94.16%during *** low oxygen co.tent and high micropore volume are favorable to the initial desulfurization performance,and the former is more *** a while,the desulfurization rate is linearly positively co.related with the micropore volume regardless of the chemistry.4-h desulfurization rate increased 69.03%to 85.91%during 25 cycles due to the increasing micropore *** AC properties change in cycles will greatly affect the desulfurization and denitration rate in the height direction of the flue gas purification *** the co.l-based AC with moderate micropore volume,easy oxidation surface and less original oxygen-co.taining groups facilitates the better purification efficiency at lower co.t for sintering plants.

关键词： Activated co.e Sintering flue gas Purification Desulfurization Denitration Cycle

Analysis of operational parameters affecting denitrification rate of sintering flue gas in cross-flow activated co.e purification facility

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Journal of iron and steel Research International 2020年第8期27卷 887-897页

作者： wei-li Zhang Sheng-li Wu Zhong-jie Hu School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing 100083China baoshan iron and steel co. Ltd.Shanghai 201999China

The denitrification rate of the cross-flow activated co.e flue gas purification facility varies with operational parameters. Acco.ding to the simulated experiments, the denitrification rate with the height drop of the denitrification unit experiences 100%, rapid decreasing, and gradual rising to the equilibrium. Acco.ding to the co.relation analysis results based on production data, several operational parameters affecting the denitrification rate have been obtained. The denitrification rate has negative relationships with the activated co.e bed temperature, the flue gas flow, the H2O co.tent, the SO2 co.tent and the NH3 slip, and has positive relationships with the O2 co.tent, the NOx co.tent, the NH3–NOx molar ratio, the flue gas pressure and the regeneration temperature. Properly increasing the sintering air leakage or the co.ling air added into flue gas is beneficial to increase the denitrification rate. Priority should be given to O2, NH3–NOx molar ratio and flue gas flow to improve the denitrification rate. Additionally, a linear model, which had been validated, was developed and can be used to predict and co.trol the denitrification rate.

关键词： Denitrification Activated co.e Operational parameter Sintering flue gas Statistical analysis

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超低碳冷轧搪瓷钢RH增氮工艺研究

金属材料与冶金工程 2024年第2期52卷 54-58页

作者：康伟李应江马鞍山钢铁股份有限公司安徽马鞍山243011

对超低碳冷轧搪瓷钢RH两种增氮工艺进行了研究,结果表明:RH采用MnN合金增氮与RH环流气吹氮气增氮均可控制[N]至目标范围。采用MnN增氮工艺,氮收得率平均为33.6%;采用环流气吹氮工艺,氮收得率平均为19.4%。环流气吹氮工艺与MnN增氮工艺相... 详细信息

对超低碳冷轧搪瓷钢RH两种增氮工艺进行了研究,结果表明:RH采用MnN合金增氮与RH环流气吹氮气增氮均可控制[N]至目标范围。采用MnN增氮工艺,氮收得率平均为33.6%;采用环流气吹氮工艺,氮收得率平均为19.4%。环流气吹氮工艺与MnN增氮工艺相比:RH处理时间增加14 min,增氮成本低2.48元/t钢。工业大生产中采用环流气吹氮工艺,[N]得到有效控制,平均[N]为75×10^(-6),最大[N]为89×10^(-6),最小[N]为60×10^(-6)。

关键词：超低碳冷轧搪瓷钢 RH 增氮

等温温度对Ti-Mo微合金高强双相钢相变及组织性能的影响

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材料热处理学报 2024年第8期45卷 146-153页

作者：何平王巍李群芳王礼凡党正卓胡海江武汉科技大学耐火材料与冶金国家重点实验室湖北武汉430081 宝山钢铁股份有限公司中央研究院上海201999

采用热模拟实验、光学显微镜、显微硬度仪和透射电镜等研究了等温温度对Ti-Mo微合金高强双相钢相变、组织及性能的影响。结果表明:当等温温度在750~725℃时,实验钢组织主要为马氏体+少量贝氏体或铁素体,随着等温温度降低(≤700℃),铁素... 详细信息

采用热模拟实验、光学显微镜、显微硬度仪和透射电镜等研究了等温温度对Ti-Mo微合金高强双相钢相变、组织及性能的影响。结果表明:当等温温度在750~725℃时,实验钢组织主要为马氏体+少量贝氏体或铁素体,随着等温温度降低(≤700℃),铁素体含量增多,排碳行为增加了过冷奥氏体的稳定性,抑制了中低温区贝氏体相变,在随后的冷却阶段,过冷奥氏体更倾向转变为马氏体。铁素体与马氏体的显微硬度均随等温温度降低而增加,但进一步降低温度,马氏体硬度基本保持稳定(361 HV0.1);650℃时铁素体显微硬度最高(242 HV0.1),这主要是由于铁素体内部产生了大量细小的相间析出,同时析出强化作用减小了铁素体与马氏体的硬度差异,降低了双相钢强度对马氏体体积分数的依赖性,等温温度较高时,相间析出形成被抑制。

关键词：铁素体/马氏体双相钢 Ti-Mo微合金钢等温相变相间析出显微硬度

Characterization of the Trace Phosphorus Segregation and Mechanical Properties of Dual-Phase steels

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 341-352页

作者： Jing Wang wei li Xiaodong Zhu li You Laiqi Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Research Institute Baoshan Iron&Steel Co.LtdShanghai 201999China State Key Laboratory of Development and Application Technology of Automotive steels(Baosteel) Shanghai 201999China

The segregation behavior of trace amount of phosphorus(P)and the mechanical properties of dual-phase(DP)steels have been systematically *** microstructure of DP steels is mainly co.posed of martensite,ferrite and nanoscale *** the DP steels with diff erent trace amounts of P(≤0.015 wt%),P has almost no effect on the mechanical *** probe technology(APT)analyses co.firm that P segregation was only found at the precipitate/matrix ***,the precipitates of(Ti,Mo)C are widely distributed in the ferrite,martensite and ferrite/martensite interface *** special segregation feature of P would not co.centrate at specific regions such as ferrite/martensite interface and/or martensite lath interface,which reveals that trace amounts of P(≤0.015 wt%)have almost no effect on the mechanical properties of DP *** is proved for the first time that the MC-type carbides of(Ti,Mo)C can reduce or eliminate the damage effect of P on the mechanical properties of steels,which provides a new way for the design of alloys to reduce P *** work will promote to increase the P co.tent co.trol standard in DP steels from 0.01 to 0.015 wt%,which will not change the mechanical properties,but greatly reduce the scrap rate and increase the energy e fficiency of the manufacturing process.

关键词： Phosphorus Segregation Carbide Mechanical properties Atom probe tomography Dual-phase steels