铁水罐倾翻机构的研究与分析

以150 t铁水罐的倾翻机构为例,对铁水罐倾翻机构的原理和特点做了简要介绍。利用inventor软件对倾翻机构的铁水、耐火材料、铁水罐体、翻转架和固定支座分别进行三维模型建立,论述了倾翻力矩的原理和理论计算方法。然后对倾翻机构在倾翻到某一角度时的三维模型进行分析和计算,得出铁水罐和翻转架的重心位置、重力臂、推力臂和倾翻力矩等性能参数,最后利用对倾翻机构进行有限元分析,对倾翻机构进行优化设计。     

铸铁机专用大容量铁水包倾翻卷扬机设备介绍

针对首钢京唐钢铁厂采用"一包到底"的铁水运输方式,结合铸铁机工艺设计及生产实践,对铸铁机工艺布置及300t铁水包(罐)铁水倾翻方式等问题进行了探讨。并首次采用专用大容量铁水包倾翻卷扬机设备。为满足铸铁机的生产能力,对铁水包倾翻速度参数要求进行详细计算与分析。对在实际生产过程中出现的问题,提出改进建议。     

铁水倾翻车倾动力矩的研究

为了保证铁水倾翻车在脱硫、扒渣工位时倾翻的可靠性,以某钢铁企业130 t铁水包倾翻车为研究对象,采用SolidWorks软件和公式计算法对倾翻过程中倾翻架及其罐体的倾翻特性进行研究.通过计算得到了随倾翻架角度α变化的倾动力矩M(α)曲线和液压缸推力F(α)曲线,计算结果精确,为液压缸的选型和强度设计提供了理论数据.     

混铁车倾翻系统状态在线动态检测

混铁车承担着铁钢区域铁水运输的重担,将铁水由高炉送往炼钢倒罐站进行倒铁作业。混铁车的倾翻系统是倒铁作业顺利完成的关键执行机构,其过程状态直接影响着倒铁作业的安全。从安全保障、生产顺行等方面介绍了混铁车倾翻系统状态在线动态检测的应用背景,系统介绍了在线动态检测的系统构成,阐述了系统组成部分的工作原理,总结了在线动态检测系统对设备状态监控、生产安全保障的实践价值。     

倾翻车倾动部件与倾角位置关系的计算及仿真

参照电弧炉倾动设计的理论计算方法,确定了铁水倾翻车倾翻时倾动部件的位置与倾角的关系,并利用虚拟样机仿真技术对计算结果进行校验,结果表明：电弧炉倾动设计的计算方法同样适用于铁水倾翻车倾动时位置关系的确定,且计算结果为铁水倾翻车倾动机构的设计与制造提供了参考价值。     

脱硫铁水罐倾翻车优化设计及计算

梅钢炼钢厂在新建二炼钢铁水脱硫站项目过程中,根据现代铁水脱硫设备的特点在新铁水罐车的设计过程中,对脱硫铁水罐倾翻车倾翻机构、走行驱动机构的设计选型和设备改进等方面进行了优化设计,校核计算。实践证明该脱硫铁水罐倾翻车的设计达到了预想的改善效果。     

90 t CONSTEEL电弧炉铁水倾翻装置改造实践

韶钢炼轧厂将90 t CONSTEEL电弧炉的65 t铁水包倾翻装置改造为100 t铁水包倾翻装置.改用100 t铁水包,缩短了铁水装兑时间,稳定和提高了铁水热装率,提高了企业经济效益.     

320t混铁车罐体倾翻传动装置设计

本文分析了国内外铁车罐体倾翻传动装置存在的问题,设计了一种新型３２０ｔ混铁车罐体倾翻传动装置。用两套相同的传动装置将倾翻罐体所需总力矩分流输入,实现了零部件的小型化设计。主减速机采用平面二次包络环面蜗杆传动,开创了混铁车罐体倾 装置设计的新途径,有极高的帝用价值和经济效益。     

一种铁水罐旋转倾翻装置的设计

国内某电炉厂为了实现电炉铁水热装技术改造,需设计一种实现电炉铁水热装的专用设备——铁水罐旋转倾翻装置。本文比较分析了几种电炉铁水热装方式的优缺点,介绍了一种电炉铁水罐旋转倾翻装置的工作原理、设备组成及技术特点。该电炉厂实施铁水热装设计改造后,年产量提高了21万t,冶炼周期缩短了13min,吨钢电耗减少了110k W·h,石灰消耗减少了25kg/t,电极消耗减少了0.8kg/t,节能降耗效果明显。为同类型电炉铁水热装设计改造提供了实践经验。     

一种鱼雷罐车防洒铁的解决方法

大型钢铁企业在高炉和转炉之间倒运铁水,公知的技术是冶金行业所用的鱼雷罐车。在炼钢厂专门的倒罐厂房,通过反复控制鱼雷罐车倾翻,最终完成铁水的倾倒任务,这也是炼钢的第一步工序。但由于现有技术的不足,鱼雷罐车常常会控制不好倾翻角度,造成洒铁事故。因此,控制好鱼雷罐车倾翻角度,降低洒铁事故的发生直接关系到后续生产的持续性。通过对鱼雷罐车倾翻控制过程的分析,将激光测距技术与除尘阀等设备相结合,找到了一种鱼雷罐车防洒铁的解决方法,该方法降低了鱼雷罐车倾翻角度人工干预率,提高了除尘效率,改善了操作者的视线,从而实现鱼雷罐倾翻的稳定控制。     

Drugs causing fixed eruptions: a study of 450 cases

BACKGROUND: Drug eruptions are among the most common cutaneous disorders encountered by the dermatologist. Some drug eruptions, although trivial, may cause cosmetic embarrassment and fixed drug eruption (FDE) is one of them. The diagnostic hallmark is its recurrence at previously affected sites. OBJECTIVE: We evaluated 450 FDE patients to determine the causative drugs. RESULTS: The ratio of men to women was 1:1.1. The main presentation of FDE was circular hyperpigmented lesion. Less commonly FDE presented as: nonpigmenting erythema, urticaria, dermatitis, periorbital or generalized hypermelanosis. Occasionally FDE mimicked lichen planus, erythema multiforme, Stevens-Johnson syndrome, paronychia, cheilitis, psoriasis, housewife's dermatitis, melasma, lichen planus actinicus, discoid lupus erythematosus, erythema annulare centrifugum, pemphigus vulgaris, chilblains, pityriasis rosea and vulval or perianal hypermelanosis. Cotrimoxazole was the most common cause of FDE. Other drugs incriminated were tetracycline, metamizole, phenylbutazone, paracetamol, acetylsalicylic acid, mefenamic acid, metronidazole, tinidazole, chlormezanone, amoxycillin, ampicillin, erythromycin, belladonna, griseofulvin, phenobarbitone, diclofenac sodium, indomethacin, ibuprofen, diflunisal, pyrantel pamoate, clindamycin, allopurinol, orphenadrine, and albendazole. CONCLUSIONS: Cotrimoxazole was the most common cause of FDE, whereas FDE with diclofenac sodium, pyrantel pamoate, clindamycin, and albendazole were reported for the first time. FDE may have multiform presentations.     

ICP-AES法测定稀土金属中的钛、钼、钨、铌和钽

针对试样特点拟定了加大称样量以减轻偏析,以浓硝酸溶解样品破坏碳化物,加入氢氟酸助溶,分离稀土基体同时络合钛、钼、钨、铌和钽的方法,无须基底匹配,采用工作曲线法成功地测定了金属镧、铈、镨、钕、钐、铕、钆、铽、镝、钇中的钛、钼、钨、铌和钽量,测定范围:0.0050%～0.50%。     

Sintered antifriction materials

Some classes of sintered antifriction materials that form the basis for the development of new materials are discussed. Metal-and nonmetal-based materials with high wear resistance, low friction coefficient, and maximum lifetime are described. They differ in composition, structure (microheterogeneous, macroheterogeneous, layered, fibrous), carrying capacity, and potential for operation under various loads, at sliding rates, and in various conditions (high and low temperatures, corrosive and aggressive media, i.e., in water, acids, alkalis, melted metals, burning-hot gases, with and without lubrication, under high vacuum), in different friction modes (light, medium, heavy, and extremely heavy). The above materials are intended for application in the aviation, motorcar, chemical, oil, metallurgical, transportation, nuclear, textile, and food industries, in cryogenic, rocket, missile, and turbine engineering. Sintered antifriction materials are developed at the Frantsevich Institute for Problems of Materials Science, in particular, under the guidance of I. M. Fedorchenko, a famous materials scientist and academician.     

X射线荧光光谱法测定不锈钢中多种元素

采用铣床制样,建立了X射线荧光光谱法(XRF)测定不锈钢中硅、锰、磷、硫、铬、镍、铜、钼、钒、钛、铌、钴元素的分析方法。通过对铣床和磨样机处理样品表面的分析,确定了铣床制备样品表面的最佳参数。对X射线荧光分析仪基本分析条件优化后,绘制了不锈钢样品中碳、硅、锰、磷、硫、铬、镍、铜、铝、钼、钒、钛、铌、钴、钨、钙、砷、锡、铅、锑和铁21个元素的回归曲线,对其中磷、硫、铬、镍、铜和钴元素进行干扰校正后,得到了较为理想的结果。比较了实验方法与火花源原子发射光谱法分析不锈钢中铬和镍元素的精密度,结果表明,实验方法的分析精密度较好。对精密度进行了验证,硅、锰、磷、硫、铬、镍、铜、钼、钒、钴元素的相对标准偏差(n=11)在0.08%~3.8%之间;对不锈钢标准样品进行分析,实验方法的分析结果与湿法或火花源原子发射光谱的测定值吻合较好。     

电感耦合等离子体原子发射光谱法同时测定铝土矿中40种组分

采用NaOH熔融分解样品,热水浸取熔融物,加入酒石酸络合钨、钼、铌、钽等易水解元素,然后在盐酸介质中用电感耦合等离子体原子发射光谱法同时测定铝土矿中Al2O3、SiO2、Fe2O3、TiO2、CaO、MgO、K2O、P2O5、MnO、Ga、Ge、V、Li、Cr、Nb、Ta、Sr、Zr、Hf、Sc、La、As、B、Ba、Be、Bi、Cd、Co、Cu、Ni、Pb、Sb、Sn、Tl、Zn、Mo、Se、In、Te和W等40种组分。通过筛选分析谱线、合理设置背景扣除位置及干扰元素校正系数,避免了光谱干扰。方法检出限为 0.05~0.85 μg/g。用本法测定了铝土矿国家标准物质和实际样品中的上述40种组分,测定值与认定值或化学法测定值吻合,测定结果的相对标准偏差（RSD,n=11）在0.15%~5.9%之间。     

Cognitive functions of school children with normal IQ and histories of severe and early malnutrition

Reference values of some hematologic and plasma chemical parameters were established in two species of clinically normal Cercopithecidae. The following variables were studied in seven mandrills (Mandrillus sphinx) and nine white-crowned mangabeys (Cercocebus torquatus lunulatus): hematocrit, hemoglobin concentration, erythrocyte and leucocyte counts, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, glucose, urea, uric acid, cholesterol, creatinine, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, creatinine phosphokinase, lactic dehydrogenase, gamma glutamyl transpeptidase, total serum proteins, albumin, globulins, albumin-globulin ratio, sodium, potassium, calcium, magnesium, total phosphorus, chloride, and serum osmolality. Few differences were observed when compared with human hematological data and with other species of Cercopithecidae Primates.     

湖南省隆回县杏枫山金矿床地质特征及成矿模式探讨

杏枫山金矿床位于湘中白马山一龙山东西向构造带与古台山一新宁南北向构造带的交汇部位,是一典型的石英细脉带型金矿床。在研究矿区地质特征基础上,通过对矿体特征、矿石成分、成矿作用过程等分析研究,提出该矿床成矿模式。认为该矿床的形成主要经历了4个阶段：第一阶段,青白口系高涧群初始矿源层的形成;第二阶段,区域深大断裂,变质作用阶段,金元素聚集、分解、化合、氧化、还原、沉淀、再循环,形成矿化富集层;第三阶段,多次岩浆活动,成矿热液形成,断裂构造活动,形成运移通道;第四阶段,岩浆活动,旧断裂复活,新断裂产生,金富集成矿。     

Comparison of results analyzed by Chinese and European laboratories for FOREGS geochemical baselines mapping samples

Geochemical subsoil data obtained from China and European laboratories have been compared in this study. 787 C horizon subsoil samples from FOREGS (Forum of European Geological Surveys) geochemical baselines mapping project were sent to China's IGGE (Institute of Geophysical and Geochemical Exploration) laboratory and composited to 190 samples according to the 160 km × 160 km GNT (Global Terrestrial Network) cells. In addition to the FOREGS elemental analysis package, Au, Pt, Pd, B, Ge, Br, Cl, Se, N, Li and F were also analyzed by using the IGGE's 76 element analytical scheme. Geochemical data statistics, scatter plotting, and geochemical map compilation techniques have been employed to investigate differences between FOREGS and IGGE analytical results. The results of two datasets, the IGGE's analysis data for composited samples, and the FOREGS average data of samples in each GNT cell, agree extremely well for about 23 elements, viz: SiO2, Sr, Al2O3, Zr, Ba, Fe2O3, Ti, Rb, Mn, Gd, CaO, Ga, MgO, P, Pb, Na2O, Y, Th, As, U Sc, Cr, and Co. There are slight differences between-laboratory biases shown as proportional errors between the datasets for Ni, K2O, Tb, Tl, Cu, S, Sm, La, Ce, Pr, Nd, Eu, Ho, Er, Tm, Yb, Lu, Ta, Nb, Hf, and Dy. For Cd, Cs, Be, Sb, In, Mo, I, Sn, and Te, the correlation of the two datasets and the similarity of the geochemical maps are fairly good, but obvious biases exist between the two datasets at values near detection limits.     

Certification of nutrients in Standard Reference Material 1846: infant formula

In 1996, the National Institute of Standards and Technology (NIST) released Standard Reference Material 1846 (Infant Formula), which can be used as a control material for assigning values to in-house control materials and for validating analytical methods for measurement of proximates, vitamins, and minerals in infant formula and similar matrixes. The SRM was manufactured by preparing a spray-dried formula base containing fat, protein, carbohydrates, and minerals and then combining that formula base with a dry-blend vitamin premix that supplied the vitamins. The Certificate of Analysis for SRM 1846 provides assigned values for concentrations of proximates (fat, protein, etc.), vitamins, and minerals for which product labeling is required by the Infant Formula Act of 1980 and by the Nutrition Labeling and Education Act of 1990. These assigned values were based on agreement of measurements by NIST and/or collaborating laboratories. Certified values are provided for vitamins A (trans), E, C, B2, and B6 and niacin. Noncertified values are provided for solids, ash, fat, nitrogen, protein, carbohydrate, calories, vitamin D, delta-tocopherol, gamma-tocopherol, vitamin B1, vitamin B12, folic acid, pantothenic acid, biotin, choline, inositol, calcium, phosphorus, magnesium, iron, zinc, copper, sodium, potassium, and chloride. Information values are provided for iodine, manganese, selenium, and vitamin K.     

Ethical standards of psychologists.

A preamble precedes a set of 19 specific principles titled as follows: Responsibility, Competence, Moral and Legal Standards, Misrepresentation, Public Statements, Confidentiality, Client Welfare, Client Relationship, Impersonal Services, Announcement of Services; Interprofessional Relations, Remuneration, Test Security, Test Interpretation, Test Publication, Research Precautions, Publication Credit, Responsibility Toward Organization, Promotional Activities. (PsycINFO Database Record (c) 2010 APA, all rights reserved)