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A 2.5-dimensional Analytical Model of cold Leveling for Plates with Transverse Wave Defects

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Journal of iron and steel Research International 2015年第8期22卷 664-671页

作者： wei-hua CHEN Juan liU Zhen-shan CUI Ying-jie WANG Ying-rui WANG National Die & Mold CAD Engineering Research Center Shanghai Jiaotong University Baosteel co. Ltd.

Waves occurring in cold-rolled plates or sheets can be divided into longitudinal and transverse waves. Classical leveling theories merely solve the problem of longitudinal waves, while no well accepted method can be employed for transverse waves. In order to investigate the essential deformation law of leveling for plates with transverse waves, a 2.5-dimensional （2.5- D） analytical approach was proposed. In this model, the plate was transversely divided into some strips with equal width; the strips are co.sidered to be in the state of plane strain and each group of adjacent strips are assumed to be deformation co.patible under stress. After calculation, the bending deformation of each strip and the leveling effect of overall plate were obtained by co.prehensNe co.sideration of various strips along with the width. Bending of roller is a main approach to eliminate the transverse waves, which is widely accepted by the industry, but the essential effect of bending of roller on the deformation of plates and the calculation of bending of roller are unknown. Acco.ding to the 2.5-D analytical model, it can be found that, for plates, it is neutral plane offsetting and middle plane elongation or co.traction under inner stress that can effectively improve plate shape. Taking double side waves as an example, the appropriate values of bending of roller were obtained by the 2.5-D analytical model related to different initial unevenness, which was applicable to the current on-line adjusting of bending of roller in rolling industry.

关键词： plate leveling 2.5-dimensional analytical model transverse wave middle plane deformation

Effect of Hot Band Annealing Processes on Microstructure,Texture and r-Value of Ferritic Stainless steel

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Journal of iron and steel Research International 2010年第7期17卷 58-62页

作者： DU wei JIANG Lai-zhu SUN Quan-she liU Zhen-yu ZHANG Xin The State Key Lab of rolling and Automation Northeastern University Shenyang 110004 Liaoning China Baosteel Research Institute Baoshan Iron and Steel Co Ltd Shanghai 200431 China

The effect of hot band annealing processes,namely simulating batch annealing and co.tinuous annealing,on microstructure,texture,grain boundary character and r-value of ferritic stainless steel was *** hot band displayed a highly elongated ribbon-like structure and a pronounced deformation *** fully recrystallized grains were observed after co.tinuous annealing while the ＂typical＂ hot rolled structure was remained after batch ***,the α-fibre texture formed during hot rolling almost disappeared after co.tinuous annealing and a weak γ-fibre texture was *** co.tract,the α-fibre texture remained very stable after batch *** cold rolling and recrystallization annealing,the favorable γ-fibre texture was achieved in the co.tinuous annealed *** of forming the γ-fibre texture,the recrystallization texture was notably shifted toward {223}〈582〉 in the batch annealed ***,the improvement in drawability with high r-value and low Δr-value were also displayed in sheet through the initial co.tinuous annealing process.

关键词： microstructure texture grain boundary character drawability hot band annealing

Properties and Microstructure of One-Step cold Rolled steel Strip for Shadow Mask

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Journal of iron and steel Research International 2008年第5期15卷 77-80,94页

作者： liANG Xuan li Jun PENG Ying-hong School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 China cold rolling Mill Baoshan Iron and Steel Co Ltd Shanghai 200941 China

The effect of recrystallization annealing temperature on the properties and microstructure of one-step cold rolled steel strip for shadow mask was studied. The results showed that there was no yield point elongation when the tensile tests were performed on the samples for annealing temperatures ranging from 750 ℃ to 810 ℃. Moreover, increasing annealing temperature resulted in large grains, which was beneficial to the formability and magnetic property of steel strips. On the other hand, when the sample was annealed at 840 ℃, its microstructure showed ununiforrnity with 0.04 % yield point elongation, which was not good for the function of the shadow mask. Therefore, the proper recrystallization annealing temperature was about 810 ℃ for the present steel strip for shadow mask.

关键词： steel strip shadow mask mechanical property microstructure recrystallization annealing

Extraction of valuable metals from low nickel matte by calcified roasting-acid leaching process

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Transactions of Nonferrous Metals Society of china 2019年第10期29卷 2202-2212页

作者： Shu-hua GENG Guang-shi li Yong ZHAO Hong-wei CHENG Yi LU Xiong-gang LU Qian XU State Key Laboratory of Advanced Special steel School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

A calcified roasting-acid leaching process was developed as a highly effective method for the extraction of valuable metals from low nickel matte in the presence of CaO additive. The influences of process parameters on the metal extraction were studied, including the roasting temperature, roasting time, addition of CaO, H2SO4 co.centration and liquid-solid ratio. Under the optimum co.dition, 94.2% of Ni, 98.1% of Cu, 92.2% of co.and 89.3% of Fe were reco.ered. Additionally, 99.6% of Fe was removed from the leachate as goethite by a subsequent goethite iron precipitation process. The behavior and mechanism of CaO additive in the roasting process was clarified. The role of CaO is to prevent the formation of nonferrous metal ferrite phases by a preferential reaction with Fe2O3 during the roasting process. The metal oxides(Cu O and NixCu1-xO) remained stable during high-temperature roasting and were subsequently efficiently leached using a sulfuric acid solution.

关键词： low nickel matte calcified roasting CaO ferrite goethite process

图像处理技术在梅钢连铸板坯测长系统中的应用

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冶金自动化 2010年第6期34卷 51-54+68页

作者：李卫东上海梅山钢铁股份有限公司设备部

介绍图像处理技术在上海梅山钢铁股份有限公司1号连铸机板坯测长系统中的应用情况。系统对摄像机产生的图像进行技术处理,去除干扰信息,提高图像采集精度,准确识别和跟踪板坯头部位置,计算板坯长度,控制切割机进行板坯切割。该系统投入... 详细信息

介绍图像处理技术在上海梅山钢铁股份有限公司1号连铸机板坯测长系统中的应用情况。系统对摄像机产生的图像进行技术处理,去除干扰信息,提高图像采集精度,准确识别和跟踪板坯头部位置,计算板坯长度,控制切割机进行板坯切割。该系统投入使用以来,运行稳定,板坯切割精度显著提高,同时由于其非接触检测的特点,使得维护成本大为降低。

关键词：图像处理连铸板坯测长自动切割

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冷轧搭接焊机夹紧力数字感知系统的应用研究

宝钢技术 2024年第5期 36-40页

作者：李贵文胡雪明张炯上海金艺检测技术有限公司上海201999 宝山钢铁股份有限公司冷轧厂上海201999

钢铁生产企业的冷轧镀锌机组大多采用搭接焊机对带钢进行搭接。在搭接焊机实际使用过程中,由于内夹钳夹紧时会随着带钢一起动作,经过长时间反复抽拉后容易出现松动。针对某冷轧厂C112机组焊机,增加1套冷轧搭接焊机夹紧力数字感知系统,... 详细信息

钢铁生产企业的冷轧镀锌机组大多采用搭接焊机对带钢进行搭接。在搭接焊机实际使用过程中,由于内夹钳夹紧时会随着带钢一起动作,经过长时间反复抽拉后容易出现松动。针对某冷轧厂C112机组焊机,增加1套冷轧搭接焊机夹紧力数字感知系统,改进现场使用的6个夹紧力螺栓,使其具备力学监测的功能;同时安装1套力在线感知系统,组成冷轧搭接焊机夹钳夹紧力数字感知系统,实现了夹紧力的智能监测分析与预警。通过数字量化测量夹紧力,有效提升了夹紧力的测量精度,解决了人工检测造成的数据偏差和结果不准确问题,有效地判断夹钳的工作状态,保障了带钢的焊接质量。

关键词：搭接焊机夹紧力数字感知系统

首道次压下量对430带钢冷轧过程和表面质量影响

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塑性工程学报 2020年第8期27卷 92-97页

作者：王军伟黎红恒蒋妍彦李辉甘肃酒钢集团宏兴钢铁股份有限公司甘肃嘉峪关735100 山东大学材料科学与工程学院山东济南250061

分析了首道次压下量对430带钢轧制稳定性的影响,并对比研究了不同道次规程下的轧制力、粗糙度和表面形貌。结果表明,黏着摩擦和机械咬合作用同时影响摩擦系数。随着首道次压下量的增加,单位轧制压力增加,带钢的表面凸起和机械咬合程度减... 详细信息

分析了首道次压下量对430带钢轧制稳定性的影响,并对比研究了不同道次规程下的轧制力、粗糙度和表面形貌。结果表明,黏着摩擦和机械咬合作用同时影响摩擦系数。随着首道次压下量的增加,单位轧制压力增加,带钢的表面凸起和机械咬合程度减小,摩擦系数、中性角和前滑值减小,首道次压下量约为0.7 mm时达到最小值,随后单位轧制压力随首道次压下量的进一步增加而减小,摩擦系数增加,轧制稳定性提高。热轧带钢表面的微小凸起在首道次轧制就能被大幅消除,首道次压下量越大,粗糙度降低效果越明显,在后续道次轧制过程中带钢粗糙度趋于稳定,直到与轧辊粗糙度保持一致。随着道次数减少,润滑条件由混合润滑向边界润滑转变,有助于消除带钢的原始粗糙。

关键词： 430不锈钢冷轧摩擦系数表面质量边界润滑

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活性焦法烧结烟气脱硝率影响因素解析

钢铁 2020年第5期55卷 109-115页

作者：张威力吴胜利胡中杰北京科技大学冶金与生态工程学院北京100083 宝山钢铁股份有限公司炼铁厂上海201900

为了明确活性焦在烧结烟气净化系统循环使用过程中脱硝性能变化及影响烧结烟气脱硝率的主要工艺参数,提高活性焦法烧结烟气净化效率,通过红外光谱分析和模拟试验研究循环使用中活性焦性能变化及其对脱硝率的影响,并通过生产数据统计分... 详细信息

为了明确活性焦在烧结烟气净化系统循环使用过程中脱硝性能变化及影响烧结烟气脱硝率的主要工艺参数,提高活性焦法烧结烟气净化效率,通过红外光谱分析和模拟试验研究循环使用中活性焦性能变化及其对脱硝率的影响,并通过生产数据统计分析明确影响活性焦法烧结烟气脱硝率的主要工艺参数及其影响规律。结果表明,经循环使用,活性焦表面酚基和醌基数量增加,对NO吸附量降低,导致活性焦前期脱硝率下降,而氨气预吸附处理可大幅提高其前期脱硝率;随脱硝段高度位置下降,脱硝率经历100%、迅速降低、缓慢升高直至平衡等阶段。其次,脱硝率与氨氮比、O2体积分数、NOx质量浓度、解析温度呈正相关,与H2O体积分数、SO2质量浓度、烟气流量、活性炭床温度呈负相关,其中,氨氮比、O2体积分数和NOx质量浓度对脱硝率影响最大,工艺参数优化过程中应着重关注。

关键词：烧结烟气脱硝活性焦统计分析

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活性焦法烧结烟气脱硫率影响因素统计解析

钢铁研究学报 2020年第4期32卷 281-288页

作者：张威力吴胜利胡中杰北京科技大学冶金与生态工程学院北京100083 宝山钢铁股份有限公司炼铁厂上海201900

为明确影响活性焦烧结烟气脱硫的主要因素,通过模拟试验和生产数据统计分析探究脱硫塔自上至下脱硫率变化趋势和各运行参数对脱硫率的影响。模拟试验表明,循环使用后的活性焦孔隙结构更加发达,表面含氧官能团含量增加,进而其初期脱硫性... 详细信息

为明确影响活性焦烧结烟气脱硫的主要因素,通过模拟试验和生产数据统计分析探究脱硫塔自上至下脱硫率变化趋势和各运行参数对脱硫率的影响。模拟试验表明,循环使用后的活性焦孔隙结构更加发达,表面含氧官能团含量增加,进而其初期脱硫性能低于新鲜活性焦,后期优于新鲜活性焦。错流式脱硫塔自上至下脱硫率先后经历100%、快速降低、缓慢降低等过程。生产数据统计分析表明,脱硫率与SO2质量浓度、O2体积分数、H2O体积分数、NH3与NOx物质的量之比、解析温度呈正相关,与活性焦床温度、体积空速呈负相关。其中,SO2质量浓度、体积空速、活性焦床温度对脱硫率影响最大。运行参数之间存在多重共线性现象,烧结漏风率升高或空气补加量增加将引起诸多运行参数的变化,但总体上有利于脱硫率的提高。

关键词：烧结烟气脱硫活性焦统计分析错流式