150t UHP电炉炼钢泡沫渣工艺

天津钢管公司炼钢厂的150t超高功率电弧炉自从1992年6月投产后，一直采用泡沫渣工艺法。现将该炉泡沫渣工艺应用叙述如下。三工艺流程装料，炉料中配焦炭粒10kg／t或配一定量的生铁～通电，第二篮料火炉后（100％废钢法）开始吹氧，用氧量10m‘八、熔化约85％时，从炉顶第5孔加     

泡沫渣行为研究

德国人Matjaz juhart等用实验室装置和图像分析法研究了炼钢泡沫渣的行为，供助图像分析可以连续观察和计算泡沫渣的形成过程，介绍了溶渣成分尤其MgO含量对泡沫渣行为的影响。     

石灰石对镍铁冶炼的影响

镍铁冶炼采用回转窑-电炉方法,选择自然熔炼渣型,是国际上比较普遍的工艺路线,而在我国无论是高炉流程还是铁合金矿热电炉流程,均在熔炼过程中配加了熔剂石灰石或石灰.缅甸达贡山镍矿项目在试生产阶段仍选择了配加熔剂石灰石.文章在整理分析试生产阶段数据的基础上,对石灰石在试生产各阶段中还原焙烧、渣熔点、回收率、杂质元素以及泡沫渣层面的影响和作用进行了分析,结果表明在还原焙烧阶段石灰石限制影响氧化物的还原,对渣熔点以及熔渣排放温度的选择影响不大,对回收率和杂质元素控制有一定的影响,且泡沫渣产生时石灰石的存在会恶化工况.     

钢包精炼用泡沫渣技术

随着泡沫渣埋弧操作技术在超高功率电炉上的推广应用，进而引入到钢包精炼的电弧加热工避，并收到显著效果，本文着竽对泡沫发泡机理、泡沫渣的组成、熔渣的物性及其对发 影响和泡沫渣埋弧操作的效果作了综述。     

脱硅工艺参数对泡沫渣的影响

用X－光透视装置,观察分析了脱硅工艺参数对泡渣的影响,结果表明,铁水温度过高,过低都会助长泡沫渣,均匀加入适量脱硅剂对缓解泡沫渣是有益的。提高脱硅渣碱度有利于降低泡沫渣,也有利于脱硅。     

直流电弧炉长弧泡沫渣技术

本文指出了直流电弧炉采用长弧泡沫渣技术的必要性及该技术的发展现状，总结了炉渣物理性质，化学成分，温度和气源等对炉渣泡沫化的影响，并介绍了电炉泡沫渣的操作工艺及实际应用效果，对宝钢三期１５０ｔＤＣ－ＵＨＰ电弧炉的泡沫渣工艺提出了看法。     

一炉三段直接炼铅泡沫渣原因分析及应用

针对一炉三段直接炼铅过程中控制不当可能引发泡沫渣事故的问题,对泡沫渣的形成原因以及相关影响因素进行分析,从而提出在生产过程中采取控制终渣硅酸度在1～1.5、控制合理熔池温度、稳定过渡操作、合理喷枪操作等措施,避免泡沫渣事故的发生。     

高炉高钛渣冶炼泡沫渣形成机理及影响因素的研究

本文立足于全钒钛矿高炉冶炼实际过程的模拟,利用X光高温透视法和气体收集法,连续观察和测定了坩埚炉内气泡产生速度及泡沫渣涨泡高度的变化。讨论了各种冶炼因素对二者的影响及作用过程,推导出了泡沫渣形成的机理过程及条件,通过主成分分析法确定了影响泡沫渣形成的主要因素。     

电弧炉操作中泡沫渣的控制

许多电炉操作者用他们的耳朵来决定电弧炉中是否存在泡沫渣 ,这是在电炉炼钢技术还处于原始状态时的一种反馈方法。如今 ,电炉炼钢过程中使用电信号来测定是否存在泡沫渣以及如果存在泡沫渣 ,泡沫渣在炉中的厚度。泡沫渣厚度控制是现代电炉炼钢的基础 ,它可以节约 1 5%～ 50 %的能量并且缩短冶炼周期。泡沫渣是一种有固定碱度范围的渣 ,它允许半埋弧操作 ,充足的一氧化碳为逸出金属熔池使渣起泡 ,渣的碱度在 1 .8～ 2 .3之间才可以形成泡沫渣 ,碱度计算公式是 :V=Ca O% + Mg O%Si O2 % + Al2 O3%渣中含 8%～ 1 0 %的 Mg O来保护渣线 /…     

钡系多功能泡沫渣应用试验

分析钡系多功能泡沫渣的作用，机理、通过试验应用，证明该材料对造泡沫渣和强化脱磷有良好效果，适用于普通功率电弧炉提高生产效率。     

Some fundamentals of B. F. Skinner's behaviorism.

Despite B. F. Skinner's prominence, his impressive written corpus, and the many authoritative presentations by others of his approach to psychology, the fundamentals of Skinner's psychology have never been addressed in any comprehensive manner. In this article, the authors take steps to fill this gap by synopsizing Skinner's written corpus into 12 fundamental points that seem to characterize his behaviorism. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Educators' perceptions of the D.A.R.E. program

This study examines the perceptions of educators about the Drug Abuse Resistance Education (D.A.R.E.) program, based on the results of a statewide survey among 286 fifth and sixth grade teachers and principals. Educators gave their highest ratings to teacher/officer interaction, the role playing exercises, and the graduation ceremony. Ratings of overall program quality and the impact of the program on students were both high. Block regression analysis was used to examine factors predictive of educators' views of D.A.R.E. D.A.R.E. program elements were the most important factors explaining variance in educators' ratings of over-all program quality and program impact on students. Altogether, 54 percent and 38 percent of the variance in both dependent variables were explained. The results are discussed in terms of the important role teachers and principals play as stakeholders in prevention education.     

Racemose angiomatosis. Comments on the article of D.E. Matsko and I.A.Sokolova. Racemose angioma of the nervous system: tumor or developmental defect? Vopr. onkol. 1966. V.42, No.6. p.91-96

Diversion colitis is thought to result from nutritional deficiencies secondary to fecal diversion. Symptoms include hemorrhagic purulent rectal discharge, abdominal pain, and tenesmus. 5-Aminosalicylic acid (5-ASA) and N-butyrate enemas have been reported to help this condition non-spinal cord injury (SCI) patients. We report the case of a 49-year-old C6 ASIA B tetraplegic man who had received colostomy because of intractable ileus 10 years earlier. He presented with a 2-week history of rectal pain and bleeding. Abdominal and rectal examination on admission were unremarkable. Colonoscopy showed a partial stricture 70cm proximally to the rectum. The colonic mucosa appeared granular and friable with evidence of linear ulceration. Histopathologic study was consistent with colitis. The patient developed fever, abdominal distention, and extensive retroperitoneal air after endoscopy, suggesting colonic perforation. He was treated with daily 5-ASA suppository and total parenteral nutrition for the presumed diagnosis of diversion colitis, and intravenous antibiotics for perforated colon. After 6 weeks of treatment with 5-ASA, the patient had decreased rectal pain and bleeding. This experience suggests that diversion colitis may be a cause of abdominal discomfort in SCI patients and that 5-ASA may be used in the management of diversion colitis.     

小方坯连铸机的切割设备

现在采用的小方坯连铸机的切割设备，分为机械剪和火焰切割机，机械剪包括电动机械剪和液压剪，而液压剪又有平剪刃和４５°剪刃之分，火焰切割机则分为有动力传动和无动力传动的火焰切割机，对这些切割设备的结构特点和优缺点均进行了分析介绍。     

Structural bonding contributions and the elastic response of b.c.c. and f.c.c. crystals

The anisotropic elastic response of body centered cubic (b.c.c.) and face centered cubic (f.c.c.) crystals is reviewed within the framework of general elasticity and particular model dependent relations. It is found that important trends in the observed behavior of specific groups of crystals can be reproduced by models that include only structural contributions to crystal binding. In fact, a very simple model, consisting of only nearest and next nearest neighbor interactions, reproduces the salient behavior, including the algebraic signs of Poisson's ratio and the orderings of the shear moduli, Young's moduli, and Poisson's ratios associated with major crystallographic symmetries. The analysis provides insight into the differences between the b.c.c. transition metals and the b.c.c. alkali metals.