酸再生机组超低排放关键技术分析及改进

盐酸再生系统是酸连轧工序的辅助系统,也是带钢生产过程中重要的环保系统。随着我国日益严格的污染物排放标准,现有的盐酸再生控制技术已经不能满足污染物超低排放要求。分析了奥地利Ruthner盐酸再生设备污染物排放不达标的原因是烟气排放温度高及氧化铁颗粒细小,通过优化一级文丘里预浓缩器、增加二级文丘里、设计冷却循环系统等方式,将烟气温度降低到50 ℃,烟气中HCl和Fe₂O₃的排放量均满足污染物排放浓度低于10 mg/m³的“双十”标准。     

电解铝烟气脱硫脱氟除尘超低排放技术应用

本文介绍了内蒙古霍煤鸿骏铝电有限责任公司应用电解铝烟气脱硫脱氟除尘超低排放技术,建成电解铝烟气污染物超低排放示范工程,并投入运行,提高二氧化硫和粉尘脱除率,降低了氟化物、二氧化硫和粉尘排放浓度,各项污染物排放指标较国家《铝工业污染物排放标准》(GB25465-2010)大幅降低,实现了电解铝烟气超低排放。     

汽轮机高低压联合转子锻件材料及热处理工艺的研究

对汽轮机高低压联合转子材料及热处理工艺参数进行了试验研究,结果表明,24Cr2Ni1Mo1V材料经过合理的差异热处理可以生产出满足质量妖要求的汽轮机高低压联合转子锻件。     

超低温高韧性球墨铸铁QT400-18AL的研究及应用

转向架轴箱为CRH300型高速列车核心部件,要求采用QT400-18AL(-40℃)球铁制造。在分析了生产这种球铁的技术难度及影响因素后,采用高纯生铁及综合技术措施研制成功全铁素体球铁转向架轴箱,其缺口冲击值分别为:20.8 J(20℃)、19.4 J(0℃)、19.2 J(-20℃)、16.8 J(-40℃)、13.6 J(-50℃),并首次给出这种铸铁的韧性、塑性转变曲线。     

板坯连铸机高效改造研究与应用

主要阐述了莱钢炼钢厂为适应后线宽带轧制产能需要,提升设备保障精度,与中冶连铸共同对新区2号板坯连铸车间进行了高效改造的设计和实施,通过对结晶器、二冷系统、振动台等方面的改造和改进,使单机年产量具备了200万t钢的水平。     

高速磨削过程在线自动动平衡控制方法及仿真研究

提出了电磁式动平衡头的整体结构、配重盘结构及测控系统的现场安装,根据电磁式平衡头的运动特点设计了整体测控方案.提出了一种有效的在线自动平衡控制策略——基于影响系数法的控制方法.并采用Matlab/Simulink仿真功能,编写了基于影响系数法的控制算法以此来验证该方法的可行性,通过仿真得到的结果表明该平衡控制方法可以很好的适用于自动平衡控制系统中,也为今后整个电磁式自动平衡测控系统的开发提供了参考和依据.     

Research on Experimental and Application for the High Efficient Enrichment of the Low-grade Precious Metal Materials

On the basis of reviewing the progress in the high efficient enrichment from secondary resources of low grade precious metals at home and abroad, a process route of the high efficient enrichment precious metals from secondary resources of low-grade metals by adding iron oxide as the trapping agent, reducing agent, additive, mixing uniformly and grinding, pelletizing, reduction, grinding and separation, and selectively acid leaching iron has been put forward in this paper. The experiments of reduction, grinding and separation, and selectively acid leaching iron were carried out mainly. Under the decided experiment parameters and conditions, iron generated during the reduction can trap precious metals during reduction, high active alloy powders were obtained from the reduced products by grinding and separation, the concentration of precious metals was obtained by acid leaching high active alloy powders. The better enrichment effect was obtained by adopting the technical route of processing. Other low grade noble metal materials and enrichment ratio of precious metals from the materials to acid products was high through acid leaching. This process has the advantages of simple process, environmental-friendly, strong adaptability of raw materials, high concentration ratio, which was regarded as a kind of the general efficient enrichment technology of low grade precious metal materials.