热轧板的氧化皮结构对酸洗效果的影响

采用金相显微镜和背散射电子衍射（EBSD）技术,从氧化皮结构出发,对低碳钢热轧板氧化皮的结构与热轧板酸洗效果之间的关系进行了研究。结果表明,低碳钢热轧板在卷取前期（温度在400～500℃）的氧化铁皮分为两层,即外层是Fe3O4,内层为FeO;在室温下放置两天以后的板,氧化皮中的FeO完全分解为Fe3O4和Fe,并且铁颗粒在原FeO的晶界富集。具有FeO和Fe3O4复合结构的氧化皮比Fe3O4单层氧化皮更易酸洗。     

Poly(o-phenylenediamine) as an inhibitor of mild steel corrosion in HCl solution

The inhibition properties of the electro-prepared P(o-phenylenediamine), P(oPD), on the corrosion rate of mild steel (MS) in HCl solutions have been investigated under different experimental conditions using weight loss and potentiodynamic polarization techniques. The data obtained from the two techniques are comparable and showed that the presence of P(oPD) in the acid solutions suppresses the corrosion rate of MS indicating that the polymer acts as corrosion inhibitor. The inhibition efficiency (IE%) of the polymer enhances with increasing its concentration and decreases with an increase in temperature. The inhibition occurs through adsorption and formation of barrier film on the metal surface which separates the metal from direct contact with the corrosive medium and hence protects the metal against the corrosion. Langmuir isotherm fits well with the experimental data. Thermodynamic parameters for both dissolution and adsorption processes were determined.     

自动软水器问题分析处理实例

通过对软水器出水质量下降的原因分析,找出001×7强酸性阳离子交换树脂铁＂中毒＂的解决办法。     

Dynamic neural network modeling for hydrochloric acid recovery process

This paper describes neural network models for the prediction of the concentration profile of a hydrochloric acid recovery process consisting of double fixed-bed ion exchange columns. The process is used to remove the Fe²⁺ and Fe³⁺ ion from the pickling liquor, resulting in increasing the acid concentration for reusing in the pickling process. Due to the complexity and highly nonlinearity of the process, the modeling of the process based on the first principle is difficult and involve too many unknown parameters. Therefore, an attractive alternative technique, neural network modeling, has been applied to model this system because of its ability to model a complex nonlinear process, even when process understanding is limited. The process data sets are gathered from a real hydrochloric acid recovery pilot plant and used for neural network training and validation. Backpropagation and Lenvenberg-Marquardt techniques are used to train various neural network architectures, and the accuracy of the obtained models have been examined by using test data set. The optimal neural network architectures of this process can be determined by MSE minimization technique. The simulation results have shown that multilayer feedforward neural network models with two hidden layers provide sufficiently accurate prediction of the concentration profile of the process.     

梅钢SPHC带钢氧化铁皮酸洗质量改善

从氧化铁皮厚度、酸洗试验、氧化铁皮的相结构、带钢力学性能等方面，比较了梅山SPHC带钢氧化铁皮在热轧工艺改进前后的差别。结果表明，通过热轧工艺改进，梅钢SPHC带钢产品既能满足供冷轧所要求的力学性能和冷轧轧制力，又能明显改善酸洗质量。     

酸洗机组No．3纠偏系统缺陷分析及功能优化

介绍了攀枝花钢铁有限责任公司冷轧厂酸洗机组No.3带钢纠偏系统的工作原理、系统组成和严重制约生产的问题。在计算的基础上重点分析了发生纠偏故障的原因 ,并提出了提高No .3纠偏系统纠偏能力的方案。总结了方案实施后纠偏系统满足了生产要求的效果。     

铵盐对钼酸铵酸洗作用的研究

通过工业试验对硝酸及硝酸铵在酸洗过程中三氧化钼杂质元素含量影响的分析 ,确定了铵盐在酸洗过程中的加入量及作用。     

酸洗工艺段设备改造的优化设计

酸洗是冷轧带钢生产的重要工序,可以有效去除热轧板的氧化铁皮。随着酸洗工艺和设备的技术发展,一些新的技术和设计方案出现,加之国内酸洗机组接近饱和,改造项目将成为主流。就槽体腐蚀问题,给出了采用PP材料制作槽体的方案;针对酸雾泄漏以及挤干辊窗口漏酸等问题,结合宝钢几条酸洗线工艺段改造项目的经验,在优化槽盖材料的同时采用独立水封设计,对挤干辊窗口采用一体式的滑动对开门设计,有效解决了酸雾和漏酸等问题,对以后的改造项目具有极好的借鉴意义。     

热轧酸洗钢表面麻坑缺陷控制研究

为提高热轧酸洗钢的表面质量,控制下游厂商反映的表面麻坑缺陷,结合现场生产跟踪及缺陷样品的微观形貌分析,得出带钢酸洗后的表面麻坑缺陷是热轧时三次氧化铁皮压入基体导致的。对于厚度偏薄宽度偏宽的极限规格而言,热轧过程中存在轧制温度过高、轧制计划编排不合理以及轧辊表面氧化膜剥落等问题。因此,本文根据轧制规格设计了轧制温度的目标值及控制范围,编排了极限规格在每个轧制单位的位置以及集中轧制的最多块数,提出了通过限制轧辊使用次数、优化冷却水和轧制油的使用、合理分配轧制负荷来保护轧辊氧化膜的措施,为满足下游厂商的需求及酸洗钢市场拓展创造了有利条件。     

冷轧联机活套轮衬对张力波动的影响探讨

通过对冷轧酸轧联机入口活套张力波动的故障分析,找出了导致活套张力波动原因,提出了活套轮盘衬块磨损的解决措施,同时设计了控制程序参数的优化方案,为处理类似的设备问题提供了思路。