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武钢3200 m3高炉出铁场设计   总被引:1,自引:0,他引:1  
刘谭璟 《炼铁》2006,25(3):19-22
结合武钢5号、6号、7号3座3200m^3高炉出铁场设计实践,对3200m^3高炉风口平台及出铁场设计的工艺布置及平台结构形式、设备选型(包括炉前吊车、泥炮、开铁口机及揭、移盖机等)、出铁场除尘抽风量及其分配等进行了阐述。  相似文献   
2.
The present study provides the first indication of the life‐history traits, including, population structure, growth pattern, condition factor, form factor (a3.0), size at first sexual maturity (Lm), natural mortality (MW) and optimum catchable length (Lopt), of three Ambassid (Chanda nama, Parambassis lala and Parambassis ranga) fishes from the Mathabhanga River in southwest Bangladesh. A total of 370 individuals were occasionally collected from August 2017 to July 2018 with cast nets, gill nets, square lift nets, and conical‐ and box‐traps. The total length (TL) ranged from 2.4 to 7.5 cm for C. nama, 1.9–3.8 cm for P. lala and 1.8–6.5 cm for P. ranga. The length‐frequency distributions (LFDs) showed the 4.0–5.0 cm TL size group for C. nama and the 3.0–4.0 cm TL size group were numerically dominant for P. lala and P. ranga. The length–weight relationships (LWRs) indicated isometric growth for C. nama, and positive allometric growth for P. lala and P. ranga. All the LWR values were very significant (p < .001), with all r2 values > .950. Based on the Spearman rank correlation test, body weight (BW) versus Fulton's‐condition factor (KF) was extremely correlated (p < .001), indicating a better wellbeing for these species. The a3.0 value was 0.0082, 0.0138 and 0.0104 for C. nama, P. lala and P. ranga, respectively. Based on the maximum length (Lmax), the Lm was 4.4 cm TL for C. nama, 2.5 cm TL for P. lala, and 4.0 cm TL for P. ranga. Based on the asymptotic length (L), the Lm was 4.88 cm TL for C. nama, 2.63 cm TL for P. lala, and 4.28 cm TL for P. ranga. The MW value was 2.2, 3.3 and 2.7/year for C. nama, P. lala and P. ranga, respectively. The optimum catchable length (Lopt) was 5.36 cm TL for C. nama, 2.75 cm TL for P. lala and 4.65 cm TL for P. ranga. The findings of the present study should be very useful for effective and sustainable management of these fishes in the Mathabhanga River and the connecting ecosystems.  相似文献   
3.
This paper presents a novel methodology for dynamic risk analysis, integrating the multivariate data-based process monitoring and logical dynamic failure prediction model. This concept for dynamic risk analysis is comprised of the fault assessment and dynamic failure prognosis modules. A combination of the naïve Bayes classifier, Bayesian network, and event tree analysis is utilized to manifest the concept. The naïve Bayes classifier is used for fault detection and diagnosis; it also generates a multivariate probability for a fault class in each time-step, which is used for dynamic failure prognosis by different paths a fault can lead a process to failure. The proposed framework has been applied to two process systems: a binary distillation column and the RT 580 experimental setup in four fault scenarios, and it is found the developed technique can effectively monitor the process and predict the failure.  相似文献   
4.
变速器渗氮齿轮制造技术的研究   总被引:2,自引:0,他引:2  
本文介绍了用于变速器的高强度渗氮齿轮制造技术的开发与研究工作。目前,这项工作已取得可喜进展,这将为变速器齿轮的精密化开辟一条崭新的途径。  相似文献   
5.
千米桥古潜山勘探获得重大突破,是综合勘探技术应用的结果。本文针对千米桥奥陶系碳酸盐岩埋藏深、地质和工程条件复杂等特点,在综合地质研究的基础上,通过地震资料连片处理、欠平衡钻井等技术的应用,从而形成了地质-工程相结合的完整的配套技术。  相似文献   
6.
歧口凹陷含油气系统与油气勘探   总被引:2,自引:0,他引:2  
歧口凹陷为第三纪以来继承发育的大凹陷,四周为凸起所限,自成一个相对独立的构造-沉积单元和油气生成-运移-聚集单元,从而形成一个含油气系统。地球化学资料表明,沙三段和沙一段为区域分布的两套主力生油层,有机质以Ⅱ1型为主,部分为Ⅰ型。沙三段烃源岩有机质热演化程度较高,油源对比证实沙三段是已发现油气藏的主要油气源。各二级构造带发育多种类型圈闭,有利于形成多含油气层系、多油藏类型相互叠置连片的复式油气聚集带。区带资源评价表明,滩海地区的白东、歧东、埕海等构造带油气资源量较大,油和气分别占凹陷区带总资源量的60%和67%,且勘探程度较低,剩余潜力很大,是今后勘探的有利区带。  相似文献   
7.
The present study analysed the length–weight relationships (LWRs) and form factor (a3.0) of Panna heterolepis Trewavas, 1977 from the Bay of Bengal, Bangladesh. A total of 316 specimens were sampled during the pre‐monsoon (n = 96), monsoon (n = 116) and post‐monsoon (n = 104) season (March 2018–February 2019) using a Seine bag net. Individual total length (TL) and body weight (BW) were measured with a measuring board and digital weight balance, respectively. The TL vs. BW relationship indicated a negative allometric growth for P. heterolepis. The present study also provides LWR, a3.0 (0.0070) and a new maximum recorded size (29.50 cm TL and 24.50 cm SL) of P. heterolepis for the first time, data currently lacking in the FishBase online database. The results of the present study will be helpful for stock assessment and management of this fish in the Bay of Bengal, Bangladesh and neighbouring countries.  相似文献   
8.
分析了锂质无光釉表面显微结构与釉面光学特征的关系。认为良好的无光釉对表面的晶体形态、晶体大小和含量以及玻璃含量均有较严格的要求。在确定釉的配方后,关键是烧成工艺,控制好烧成温度和降温速率极为重要。成核剂的加入对形成理想的锂质无光釉表面显微结构反而不利。  相似文献   
9.
在固定床反应器和热重分析仪上对浸渍法制备的过渡金属氧化物载氧体MnO2/Al2O3、Fe2O3/Al2O3和CuO/Al2O3与转炉放散煤气中CO的反应特性进行了研究,并结合比表面积分析、脉冲化学吸附和扫描电镜等手段表征了CuO/Al2O3的循环寿命性能。结果表明,在上述三种载氧体中CuO/Al2O3表现出了最佳的反应活性,反应进行2 min时的CO转化率在225℃以上的反应温度下就能达到90%。在350℃、还原反应空速4000 h-1和氧化反应空速159 h-1的条件下,CuO/Al2O3能够保持良好且稳定的CO脱除性能和机械强度,因而具有良好的循环寿命。据此,提出了基于化学链燃烧的转炉放散煤气利用新工艺,本工艺可安全利用间歇排放的转炉放散煤气,并实现对用户的连续供热。  相似文献   
10.
介绍了弹力复合纱线的加工方法及原理,并对不同的弹力复合纱线的性能进行了分析比较以及复合纺纱方法在纺织上的应用。  相似文献   
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