喷煤未燃煤粉在高炉内行为的研究

在模拟攀钢高炉喷吹煤粉的生产条件下进行的未燃煤粉在高炉内的行为研究结果表明，在铁的直接还原、生铁渗碳、硅和钛还原、未燃煤粉和焦粉在炉渣中沉积、煤和焦炭反应性的各个试验中，未燃煤粉的反应性都大于焦炭，这些都是由于未燃煤粉的比表面积大，结构疏松所造成的。     

天铁炼铁技术进步

近十年来，天铁集团炼铁厂通过改善原燃料条件；优化炉料结构，提高入炉品位；采用提高炉顶压力、富氧喷煤、低硅冶炼、炉顶气象系统等多项先进技术，使高炉各项经济技术指标逐年提高。     

W-Ni-Cu高比重合金注射成形烧结收缩及性能的研究

研究了W-Ni-Cu高比重合金注射成形工艺过程收缩率和性能。比较了模具尺寸、注射坯尺寸、烧结坯尺寸，及烧结阶段各方向收缩率的关系，发现实际收缩与理论预测收缩率较为一致，但在厚度方向存在与其他方向收缩不一致的情形，这与由重力作用产生的塑料流动有关；还探讨了烧结坯密度与烧结条件的关系，测定了烧结坯的力学性能及断口形貌、金相组织，烧结坯在1400℃，90min烧结达到了99％的相对密度，断裂强度600MPa以上。     

注入剖面双相态放射性测井方法研究

文章结合注入剖面同位素示踪和放射性相关流量两种测井方法的特点,提出了固态微球同位素和液态同位素同时使用的综合测井方法.应用放射性相关流量测井的直观性,量化同位素示踪测井中的不确定因素,达到提高测井成功率和资料解释精度的目的.     

大庆油田三类油层聚合物驱注入速度研究

注入速度是影响聚合物驱开发效果的重要指标,而由于假设条件的局限性,数值模拟方法无法体现聚合物溶液弹性对注入速度的影响。为了确定大庆油田三类油层合理注入速度,通过不同注入速度条件下的天然岩心驱油试验,对水驱和聚合物驱驱油效率进行了研究,结果表明,聚合物驱驱油效率提高值随驱替速度的变化可由二次多项式来表示。依据此关系式,由势的叠加理论得到的流体在油层中的渗流速度的基础上,建立了该类油层合理注入速度模型,并给出大庆油田三类油层在100 m注采井距下的合理注入速度为0.288 PV年/,该方法对现场开发方案编制有重要指导意义。     

Numerical Filling Simulation of Injection Molding Using Three-Dimensional Model

1 Introduction During injection moulding, the rheological response of polymer melts is generally non-Newtonian and nonisothermal with the position of the moving flow front. Because of these inherent factors, it is difficult to analyze the filling process. Therefore, simplifications usually are used. For example, in middle-plane technique and dual domain technique [1], because the most injection molded parts have the characteristic of being thin but generally of complex shape, the Hele-Shaw …     

THE FLOW PRODUCED IN PARTICLE-SUSPENSION BY AN INFINITE ROTATING DISK:SERIES SOLUTION

To the flow produced in particle-suspension by a rotating disk of infinite extent,the asymptotic behavior at infinity is analyzed.A corresponding series solution is presented.It isshown that this approach yields widely valid solutions of high accuracy for all the cases in whichthat suction or weak injection at the disk surface exists.For the cases that strong injection or par-ticle-free band exists,the series method fails.     

Volatile organo-halogen trace analysis in beverages by thin-layer headspace enrichment and electron-capture gas-chromatography

Applicability of thin-layer headspace (TLHS) procedure giving an aqueous concentrate and also classical purge and trap (PT) in off-line mode to isolate and enrich volatile organohalogen compounds in common beverages was tested. Both enrichment tech-niques were used in combination with gas chromatography – electron capture detection (GC-ECD). TLHS, combined with direct aqueous injection (DAI)-GC-ECD, proved applicable in the determination of volatile organohalogen compounds in all studied beverages, while the PT in a version with no preliminary sample pre-treatment was of limited applicability. Detection limits of the TLHS-based procedure were in the order of 1 ppt. Content of volatile organohalogen compounds in a number of beverages available on the Polish market including mineral waters, beers, juices, carbonated and non-carbonated soft drinks, etc. was determined by means of TLHS-DAI-GC-ECD.     

岩心PI值试验研究及应用

主要论述了在多功能采油化学用剂评价仪上进行的岩心ＰＩ值试验的步骤，现象及结论。重点考察了岩心ＰＩ值与渗透率、流量及注入截面面积的关系；平行管岩心复合ＰＩ值和其中单管岩心ＰＩ值的关系。     

大庆长垣南部油田周期注水的做法及效果

本总结了大庆长垣南部周期注水的做法和效果。实践证明，在低渗透，薄油层，单井低注低产的油田上实施周期注不仅能够改善油田开发状况，而且也为低注井的冬季管理提供了方便条件。