对低压锅炉改造的探讨

本文针对贵溪冶炼厂 4 # 低压锅炉的现状 ,从技术、运行成本、改造费用等几个方面进行比较 ,提出了有针对性的改造方案。     

回程式钠离子交换器技术改造

本文详细分析了贵溪冶炼厂动力车间4#、5#钠离子交换器改造前存在的问题,提出了改造方案,介绍了改造后的使用效果,并对改造前后的运行数据、产生的经济效益和社会效益作了对比。     

激光半焊型板式换热器在冶炼领域的应用

本文详细介绍了激光半焊板式换热器的原理,分析了激光半焊模块与普通板式换热器相比较的优越性,并最后给出了其在化工领域应用的最新进展。     

ISA法铜电解槽槽面水平误差的控制

本文介绍了通过采用找平装置来控制ISA法铜电解槽槽面水平误差的方法,通过现场测量及工艺操作证明是行之有效的。     

ZTE Debuts LTE-A InterBand Dual-Carrier Commercial Base Station at MWC

ZTE debuted its LTE-A interband dual-carrier commercial base station at the Mobile World Congress2012(MWC2012)in Barcelona on February27,2012.The new     

电站锅炉制造质量控制技术

本文对电站锅炉常见的制造质量问题及产生原因进行了分析,针对具体问题提出了解决措施。     

Prioritization methodology of dangerous substances for water quality monitoring with scarce data

Monitoring and control of dangerous substances discharged into receiving waters have attracted more attention lately. Since it is not possible to analyze every single substance, a prioritization methodology is needed for the selection of those to be monitored. Existing well-developed models require significant amount of data for reliable outcomes. This paper presents a methodology to prioritize the dangerous substances having adverse effects on freshwaters in Turkey, where data are scarce. Such a methodology will also serve as a solid model for other countries with limited background data. The adopted methodology enabled the elimination of chemicals to generate a candidate list composed of 608 substances among more than 5000 substances. Further screening and prioritization were conducted using different assessment methods (i.e., Total Hazard Value, Total Impact Value, Combined Monitoring-based, and Modelling-based Priority Setting) to obtain a proposed Final Candidate Specific Pollutants List of 150 dangerous substances. The proposed Candidate National Pollutant List of Turkey was established by combining 45 priority pollutants of the European Union with a list of candidate specific pollutants. According to the outcomes of this study, monitoring and controlling of 195 dangerous substances in freshwaters are recommended. Further detailed studies should be conducted in order to observe the actual levels of these dangerous substances in freshwaters followed by a review of the monitoring list accordingly. Moreover, further revisions might be required in the proposed list due to some possible versatile conditions in terms of sampling points (i.e., change in the location of industries).     

ZTE Attains Global No.1 Spot for PCT Patent Filings

According to the website of the World Intellectual Property Organization,ZTE filed for2826applications in2011.The company moved up from its No.2spot     

Effect of Hydrogen on Tensile Properties of Ultrafine-Grained Type 310S Austenitic Stainless Steel Processed by High-Pressure Torsion

This study addresses a hydrogen effect on the tensile properties of a type 310S austenitic stainless steel with ultrafine-grained structures produced by high-pressure torsion (HPT) and subsequent annealing. The mean grain size was reduced to ~85 nm by the HPT processing. The grain size was increased by the post-HPT annealing, but the grain size of ~265 nm was retained after annealing at 1023 K (750 °C). The tensile strength of ~1.2 GPa, which is approximately twice as much as that of the solution-treated specimen, was attained in the 1023 K (750 °C) post-HPT-annealed specimen. The elongation to failure was restored up to ~15 pct by the post-HPT annealing, although it was still insufficient in comparison with the ~55 pct elongation of the solution-treated specimen. There was no change in the tensile strength of the HPT-processed specimens and the post-HPT-annealed specimens by hydrogen charging with the hydrogen content in the range of ~20 to 40 mass ppm. The HPT-processed and the 773 K (500 °C) post-HPT-annealed specimens exhibited a ductility loss through the fully shear type fracture. The hydrogen charge into higher temperature post-HPT-annealed specimens with σ-FeCr precipitates led to a mild hydrogen embrittlement.