钢轨的质量要求与包钢钢轨生产的质量控制措施

根据我国铁路高速重载的特点 ,分析了钢轨的质量要求 ,论述了包钢连铸工艺生产钢轨的技术特点和质量控制措施 ,结论认为 ,包钢钢轨具有较高的纯净度 ,各项性能较好 ,轧制工艺设备技术改造完成后 ,包钢可具备批量生产高速轨的能力。     

包钢炼铁系统技术进步

介绍了包钢炼铁厂近10年来的生产实践及取得的技术进步。包钢炼铁厂充分利用铁、烧合并后管理上的便利条件,强化高炉操作,使包钢炼铁生产维持在较高水平。包钢炼铁技术进步包括烧结矿、球团矿、焦炭、煤粉的产质量,高炉操作制度调整及管理．高炉安全停炉及开炉之后快速达产．高炉长寿技术等方面的技术进步,包钢4号高炉实现了连续7年不中修的长寿目标。     

大气氟治理技术及包钢氟污染控制对策

本文叙述了氟的性质及其危害性,简要分析总结了包钢大气氟污染状况及干法、酸法、碱法除氟的工艺技术特点,针对包钢地区重点排氟源的污染现状和特点,提出了对包钢烧结厂、炼铁厂、稀土一厂及东风钢铁厂的氟污染治理对策及方案.实施后可使包钢地区减少大气排氟60%.     

钢渣的矿物组成及显微结构

对包钢不同粒级及磁选前后的钢渣样品镶嵌后,磨制成光片,在矿相显微镜下对包钢钢渣的矿物组成和显微结构进行了观察.结果表明:包钢钢渣的矿物组成复杂,主要由硅酸二钙、复合铁酸钙、RO相和少量残钢构成.包钢钢渣的显微结构不均匀,残钢对钢渣的铁品位影响较大.     

攀钢钙处理相关工艺技术取得显著成效

由攀研院承担的“钙处理相关工艺技术研究”课题取得显著成效，成功的将连铸中间包钢水中的[Ca］含量稳定控制在20ppm左右，钢水中的[Ca]／[Als]≥0．09，解决了钙处理钢水浇注过程中水口结瘤和变流的问题，为多炉连浇的推进和铸坯质量的提高提供了重要的技术支撑。     

包钢钢轨生产工艺与质量控制

连铸投产后，包钢钢轨生产工艺和质量水平处于国内领先地位。本文论述了包钢钢轨的生产工艺及质量控制措施，分析了包钢钢轨的质量特点，并针对影响连铸工艺技术优势发挥的因素，提出了应采取的措施和对策。     

包钢炼钢厂连铸车间职业危害控制效果评价

包钢炼钢厂连铸车间投产后,为了解该车间工艺过程中产生的职业危害种类及控制效果,对其投产后的职业卫生状况进行了评价,文章简要介绍了对包钢炼钢厂连铸车间职业危害控制效果的评价过程与结果.     

努力铸造西北地区强势特色非钢产业

包钢是新中国成立后最早建设的钢铁工业基地之一,目前已发展成为千万吨钢级企业.今年上半年,包钢克服市场低迷的压力,累计产钢502万吨;实现销售收入273亿元,实现利润总额17.6亿元."十二五"期间,包钢将推进再创业、建设"大包钢",实现年销售收入1000亿元以上.地处少数民族地区的包钢,正努力打造百年老店,发展成为国内外一流企业.     

提高包钢竖炉球团矿转鼓强度实践分析

文章就包钢炼铁厂8m^2竖炉投产后,提高球团矿转鼓强度所采取的技术措施及效果进行了全面总结分析。包钢炼铁厂通过提高原料质量、改进工艺、配加复合粘结剂、提高干燥及焙烧温度等措施,使得包钢竖炉球团矿的转鼓强度由投产初期的88％左右提高到91％以上。     

连铸动态轻压下工艺对重轨坯内部质量的改善

文章对包钢连铸动态轻压下技术的基本情况进行了介绍,并重点介绍了包钢重轨钢采用动态轻压下技术后,铸坯中心碳偏析、铸坯中心疏松以及钢轨轨腰条纹的改善情况。     

中水替代新水用于氧化铝生产的实践

氧化铝生产用水量大、对水质要求各不相同。生活污水经处理成为中水,具有水源可靠、成本低、距离用户近等优点。本文介绍了中水其替代新水用于氧化铝生产的具体做法和取得的效果。     

Effects of Primary Substrate Concentration on NDMA Transport during Simulated Aquifer Recharge

N-nitrosodimethylamine (NDMA) is known to be highly carcinogenic and is present in drinking water, wastewater, and a variety of foods. Because of its presence in chloraminated water at nanogram per liter concentrations, NDMA has become an emerging issue for reclaimed water which may be used for aquifer recharge or irrigation. This research investigated the fate of NDMA in two soil column systems used to simulate subsurface transport. One column system was operated under aerobic conditions with increasing primary substrate concentration where the biodegradable organic carbon (BDOC) in reclaimed water was used as the primary substrate. The reclaimed water content in the influent was increased from 0 to 25% in the column to increase the BDOC concentration. Negligible NDMA removal was observed at 0% reclaimed water and increasing the primary substrate in the influent resulted in NDMA removal suggesting that biodegradation of NDMA might be a cometabolic process. The effects of redox conditions on NDMA fate was studied by operating a second column system with 100% reclaimed water under anoxic conditions and then changing the conditions to aerobic. It was observed that NDMA removal was similar under both aerobic and anoxic condition, however, much lower effluent concentrations were observed under aerobic conditions. Under anoxic condition, a normalized mass removal rate of 254 ng NDMA/mg DOC was observed which increased to 273-ng NDMA/mg DOC under aerobic conditions. The majority of NDMA and substrate removal occurred in the first of three columns in series column under both aerobic and anoxic conditions. Normalized mass removal rates of NDMA after the first, second, and third columns were 372, 30, and 20 ng NDMA/mg DOC, respectively. Since the majority of dissolved organic carbon was also removed in the first column, NDMA biodegradation was consistent with cometabolic activity. Batch tests verified the biodegradation removal potential of NDMA. Addition of a methylotrophic substrate, methanol and an aromatic substrate, toluene, did not increase NDMA removal.     

城市污水再生水回用技术在铜冶炼厂的应用

介绍了某大型铜冶炼厂采用城市污水再生水作为生产水源的使用情况,详细介绍了城市污水再生水回用技术的工艺流程、主要设备选型以及成本分析。目前该处理装置运行稳定,成本可控,不仅能够保障企业用水安全,节约了地下水及地表水资源,还能适应国家水资源政策的要求,有利于企业控制用水成本,保障企业正常生产,提高企业经济效益。     

铜冶炼烟气制酸净化设备、管道结晶分析及对策

介绍了烟台国润铜业有限公司制酸净化系统出现的设备、管道结晶问题,对结晶物成分及产生原因逐一分析,最终确定为铜精矿和煤中的氯元素进入冶炼烟气,在净化工序中被洗涤进入废酸中,与氢氧化钙反应,形成氯化钙,导致返回净化工序的回用水钙含量高,钙元素形成硫酸钙导致净化工序设备、管道结晶.进行了超高石灰铝法去除氯离子的小试,结果无法...     

城市再生水中大肠杆菌在浮选过程中迁移规律

通过再生水模拟浮选试验和吸附、解吸附试验分析研究了城市再生水中大肠杆菌在浮选过程中的迁移规律.研究结果表明:再生水中大肠杆菌能够快速被矿物颗粒吸附,尾矿废水继续回用于浮选流程是安全的,但精矿、中矿、尾矿中吸附了大量的大肠杆菌,在特定暴露水平下会对从业人员构成健康风险;矿物颗粒对大肠杆菌的吸附是影响再生水中大肠杆菌在浮选过程迁移的主要因素;随着大肠杆菌浓度的升高,大肠杆菌衰减率、吸附速率随之下降;矿物颗粒对大肠杆菌的吸附对pH变化敏感,随着pH升高,矿物颗粒对大肠杆菌的吸附呈下降趋势,捕收剂煤油、Pj053和调整剂CaO的加入会明显提高矿物颗粒对大肠杆菌的吸附.      

An Overview of Reclaimed Wastewater Reuse in Gold Heap Leaching

The intensive use of groundwater by the gold mining industry is an important sustainability concern, especially in arid and semiarid regions where groundwater is a scarce resource. Alternatives, such as water reuse, treatment and recycling, have been implemented to overcome this issue. The potential use of reclaimed wastewater in gold heap leaching, without decreasing the process efficiency, has not yet been considered. Hence, this review focuses on the physicochemical, biological, and chemical features (organic matter, microbial loads, metal ions, and anions) of reclaimed wastewater that may limit its use in gold heap leaching.     

Pilot-Scale Electrocoagulation with Bipolar Aluminum Electrodes for On-Site Domestic Greywater Reuse

Designing a reclaimed water system provides an economically and environmentally favorable method for disposing of wastewater. However, some critical influences on on-site reclaimed water systems, such as limited building area, often limit the effectiveness of conventional treatment methods. This work established a compact and inexpensive electrocoagulation process with a capacity of 28?m3/day to reclaim domestic greywater for human noncontact usage. The total unit cost of on-site domestic greywater reuse was U.S.?$0.27/m3, which was below the local potable water rate. Moreover, the treatment facility required an area of 8?m2. Both unit cost and required area in this work are lower than those reported in the literature. The experimental results support the feasibility of the on-site reuse of greywater in high-rise buildings.     

Evaluation of a System for Residential Treatment and Reuse of Wastewater

Approximately one-quarter of housing units in the United States are not connected to centralized, publicly owned wastewater treatment works and instead operate their own cesspools or septic tanks that provide only partial treatment. A study was conducted in which a commercially available, on-site, residential wastewater package unit was tested at its design capacity according to an established protocol to determine if it could produce a high-quality effluent. Additional pilot-scale sand filtration and ultraviolet disinfection units were fabricated and operated to determine the feasibility of producing recycled water suitable for residential reuse and which could meet strict water reuse regulations. The results indicate that the package unit can produce an effluent equivalent to secondary effluent when properly operated and maintained. In addition, using add-on sand filter and ultraviolet light disinfection units, it was possible to produce the highest quality of reclaimed water recognized by Hawaii regulations (oxidized, filtered, disinfected, unrestricted use). It was also possible and may be economically feasible to produce a slightly lower quality reclaimed water (oxidized, disinfected, R-2) suitable for residential subsurface irrigation.     

稀土草沉废水回收利用试验

在任何浓度的盐酸都可以与水共沸的原理指导下 ,采用蒸馏和浓缩共用的方法回收草沉废水中的盐酸和草酸晶体。经试验证明 ,采用该种方法处理草沉废水并将产生的稀盐酸和草酸回用于稀土生产是可行的。其稀盐酸和草酸的回收率可达到 95 %以上     

膜处理技术在太钢水处理系统的应用

介绍了太钢应用膜处理技术的工业污水处理系统和中水深度处理系统。该技术的应用对降低钢铁企业吨钢新水耗量有一定的效果。