The PHENIX Experiment at RHIC

The physics emphases of the PHENIX collaboration and the design and current status of the PHENIX detector are discussed. The plan of the collaboration for making the most effective use of the available luminosity in the first years of RHIC operation is also presented.Comment: 5 pages, 1 figure. Further details of the PHENIX physics program available at http://www.rhic.bnl.gov/phenix

Liquid-phase separation of products of solid-phase reduction of ferro-vanadium concentrates

Рассматривается возможность получения из южноуральских железо-ванадиевых концентратов чугуна с низким содержанием титана и шлака с максимально высоким содержанием оксидов титана. Possibility of producing pig-iron with low titanium content and slag with maximally high content of titanium oxides from South Ural ferro-vanadium concentrates is considered

Laboratory investigation of asphaltene-induced formation damage

Abstract The purpose of this study is to evaluate the degree of formation damage caused by asphaltene deposition in the pore throats in case of oilfield operation. Many wells in the Samara region oilfields are operated under high reservoir drawdown, with downhole pressure lower than the bubble point. Such wells’ operating conditions lead to a change in oil composition (light components are extracted from oil while asphaltenes are precipitated and deposited) in the near wellbore, and the productivity of the wells declines due to asphaltene deposition. The study procedure presented in the paper included the following methods: high-pressure microscopy with grain size analysis (the visual method), the near infrared light scattering method and the gravimetric method to measure asphaltenes onset pressure in oil. Formation damage was measured by the filtration method. Asphaltene concentration in oil after filtration was measured by the photocolorimetric analysis. Microcomputed tomography of the core sample was provided to visualize formation damage. In addition, fluid flow in the pore space was simulated before and after asphaltene deposition using a dynamic simulator. In the paper, reservoir oil of one of the Russian oilfields was investigated. The main results of this paper are the following: asphaltene onset pressure in oil at the reservoir temperature (48 °C) was measured as equal to 6.8 MPa which is slightly higher than the bubble-point (6.5 MPa). Oil was flowed through the core sample of the field at three different specific backpressures (at constant flow rate) and formation damage was estimated. The studies have shown that decrease in permeability of the core is caused by asphaltene deposition in the pore space. In this case, a decrease in the amount of asphaltenes in oil emerging from the core sample is observed which was proved by the spectrophotometric analysis. Via microcomputed tomography, a 3D model of the rock matrix and the pore space of the initial and damaged core sample was constructed and a decrease in porosity after formation damage was estimated. Based on the obtained 3D model of the core, computer simulation of fluid flow (in a dynamic simulator) in the initial and damaged core was performed, and the flow parameters (velocity and streamlines) were calculated. The proposed methodology including a set of physical methods to study a core before and after formation damage combined with fluid flow simulation enables predicting potential complications under the field operation

Solid-phase metallization of ferro-vanadium concentrates

Рассмотрены процессы, протекающие при твердофазной металлизации железо- ванадиевых концентратов. Прослежена последовательность превращений в концентратах. Определена температура восстановления металлов из их оксидов и продолжительность выдержки для восстановления железа. The article considers the processes proceeding at solid-phase metallization of ferrovanadium concentrates. The sequence of transformations in concentrates is tracked. Temperatures of reduction of metals from oxides and duration of holding for iron reduction are defined

Structure and magnetic properties of amorphous alloys as a function of degree of crystallinity

Гойхенберг Юрий Нафтулович, доктор технических наук, профессор кафедры физического металловедения и физики твёрдого тела, Южно-Уральский государственный университет. Тел.: (351)2679013. E-mail: [email protected] Goykhenber Yuriy Naftulovich, doctor of engineering science, professor of the Physical Metallurgy and Solid State Physics department, South Ural State University. Tel.: (351)2679013. E-mail: [email protected] Рощин Василий Ефимович, профессор, доктор технических наук, заведующий кафедрой пирометаллургических процессов, Южно-Уральский государственный университет. Тел.: (351)2679292. E-mail: [email protected] Roschin Vasiliy Efimovich, professor, doctor of engineering science, head of the Pyrometallurgical Processes department, South Ural State University. Tel: (351)2679292. E-mail: [email protected] Ильин Сергей Иванович, кандидат физико-математических наук, доцент кафедры физического металловедения и физики твёрдого тела, Южно-Уральский государственный университет. Тел.: (351)2679013. E-mail: [email protected] Ilyin Sergey Ivanovich, candidate of physical and mathematical science, associate professor of the Physical Metallurgy and Solid State Physics department, South Ural State University. Tel.: (351)2679013. E-mail: [email protected]Показано, что определяющую роль в формировании наилучшего комплекса магнитных характеристик аморфно-кристаллических материалов выполняет не только степень кристалличности, но и размеры возникающих нанокристаллитов. Установлены температурные интервалы кристаллизации аморфных сплавов на железной и кобальтовой основах и определен их фазовый состав. Ключевые слова: аморфные, нанокристаллические, магнитные свойства, фазовый состав, степень кристалличности.It has been demonstratred that the size of formed nanocrystallites contributes to the best magnetic properties in amorphoucrystailine materials as well as degree of crystallinity. Temperature intervals for crystallization of amorphous alloys on the basis of iron and cobalt are established and their phase composition is determined

Neuro-cognitive and biological effects of pine needle extract, Ropren on healthy elderly participants

Abstract not available

Neutralizing of hazardous emission from electric steel furnaces with thermal and chemical treatment

За период интенсивного развития электрометаллургического производства в области обработки отходящих газов накопился ряд проблем, которые не имеют удовлетворительного решения или остались принципиально нерешёнными до сегодняшнего дня. Они в той или иной мере характерны для всех электрометаллургических агрегатов, но особенно важны для агрегатов с предварительным подогревом лома. Эти факторы существенно влияют на экономическую эффективность и способность соблюдения норм охраны окружающей среды. Для определения мер и целей дальнейшего развития в области обработки отходящих газов необходимо проанализировать их состояние на данный период времени. В статье кратко рассмотрены вопросы нейтрализации вредных выбросов из электросталеплавильных агрегатов путём термической и химической обработки отходящих газов. During the snowballing period of electrometallurgical production in the sphere of waste gas treatment there has been accumulated a number of problems that still have no satisfying solution or are principally unsolved. These problems are typical for all electrometallurgical plants and in particular for plants with scrap pre-heating. These factors influence substantially upon cost efficiency and observance of environmental standards. To determine arrangements and purposes for further development in waste gas treatment sphere it is necessary to analyze their today's state. This article considers in brief the development state of hazardous emission neutralizing of electric steel making plants with thermal and chemical waste gas treatment