Studying the physical-chemical properties of alloyed metallurgical waste as secondary resource-saving raw materials

Дослiджено особливостi фазового складу та мiкроструктури шлакiв алюмотермiчного виробництва лiгатур тугоплавких елементiв рiзних марок та окалини швидкорiжучої сталi Р6М5 щодо природи присутностi легуючих елементiв. Це необхiдно для забезпечення зменшення втрат Mo, W та iнших легуючих елементiв сублiмацiєю з пiдвищенням температури при переробцi техногенних вiдходiв. Фазовий склад визначали методом рентгенофазового аналiзу. Мiкроструктуру дослiджували на растровому електронному мiкроскопi в комплексi з рентгенiвським мiкроаналiзом використанням безеталоного методу розрахунку фундаментальних параметрiв. Визначено, що шлаки алюмотермiчного виробництва лiгатур АХМ-50 та АМВТ складаються з CaAl4O7 та з’єднань AlV2O4 i CrO2. Це може обумовлювати певний рiвень легованостi шлаку тугоплавкими елементами. У шлаку вiд виплавки лiгатури МФТА виявлено фази Al75Mo20W5 та Mo(Si, Al)3, що можуть бути представленi металевими вкрапленнями. Фази окалини сталi Р6М5 в основному представленi Fe3O4, Fe2O3 та FeO. Також виявлено FeWO4, MoO2, WC, Mo2C, що обумовлюється пiдвищеним ступенем легованостi W та Mo. Не виключено, що деяка частка атомiв легуючих елементiв, в тому числi Cr та V, може знаходитися в якостi атомiв замiщення в оксидах Fe. Мiкроструктура дослiджених шлакiв та окалини характеризувалася розупорядкованiстю часток рiзного розмiру та форми. Виявлено присутнiсть в окалинi часток з вiдносно високим вмiстом легуючих елементiв. В дослiджених матерiалах вiдсутнi з’єднання з пiдвищеною схильнiстю до сублiмацiї. Це зумовлює вiдносно високий ступiнь використання легуючих елементiв. В дослiджених матерiалах вiдсутнi з’єднання з пiдвищеною схильнiстю до сублiмацiї. Це зумовлює вiдносно високий ступiнь використання легуючих елементiв i зменшує певнi обмеження додавання дослiджених шлакiв у шлакоутворюючi сумiшi та температурнi обмеження режимiв плавлення. Використання шлакiв алюмотермiчгого виробництва та окалини швидкорiжучих сталей в шихтi для виплавки легуючого сплаву забезпечило вилучення тугоплавких елементiв та додаткову легованiсть кiнцевого продукт

ECOANALYTICAL CONTROL OF BIOLOGICALLY ACTIVE SUBSTANCES IN THE REAL OBJECTS BY THE METHOD OF DIRECT POTENTIOMETRY

It is show that devised ion–selective electrodes (ordinary film electrodes and solid–state membrane–coated electrodes) can be used as the indicator ones. The procedures of the direct potentiometric determination of thiazine derivatives in trade forms, agricultural production and object of environment are proposed

The PHEMU09 catalogue and astrometric results of the observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made in 2009

Context. In 2009, the Sun and the Earth passed through the equatorial plane of Jupiter and therefore the orbital planes of its main satellites. It was the equinox on Jupiter. This occurrence made mutual occultations and eclipses between the satellites possible. Experience has shown that the observations of such events provide accurate astrometric data able to bring new information on the dynamics of the Galilean satellites. Observations are made under the form of photometric measurements, but need to be made through the organization of a worldwide observation campaign maximizing the number and the quality of the data obtained. Aims. This work focuses on processing the complete database of photometric observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made during the international campaign in 2009. The final goal is to derive new accurate astrometric data. Methods. We used an accurate photometric model of mutual events adequate with the accuracy of the observation. Our original method was applied to derive astrometric data from photometric observations of mutual occultations and eclipses of the Galilean satellites of Jupiter. Results. We processed the 457 lightcurves obtained during the international campaign of photometric observations of the Galilean satellites of Jupiter in 2009. Compared with the theory, for successful observations, the r.m.s. of O-C residuals are equal to 45.8 mas and 81.1 mas in right ascension and declination, respectively; the mean O-C residuals are equal to -2 mas and -9 mas in right ascension and declination, respectively, for mutual occultations; and -6 mas and +1 mas in right ascension and declination, respectively, for mutual eclipses. © ESO, 2014

The PHEMU09 catalogue and astrometric results of the observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made in 2009

In 2009, the Sun and the Earth passed through the equatorial plane of Jupiter and therefore the orbital planes of its main satellites. It was the equinox on Jupiter. This occurrence made mutual occultations and eclipses between the satellites possible. Experience has shown that the observations of such events provide accurate astrometric data able to bring new information on the dynamics of the Galilean satellites. Observations are made under the form of photometric measurements, but need to be made through the organization of a worldwide observation campaign maximizing the number and the quality of the data obtained.Aims. This work focuses on processing the complete database of photometric observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made during the international campaign in 2009. The final goal is to derive new accurate astrometric data.Methods. We used an accurate photometric model of mutual events adequate with the accuracy of the observation. Our original method was applied to derive astrometric data from photometric observations of mutual occultations and eclipses of the Galilean satellites of Jupiter.Results. We processed the 457 lightcurves obtained during the international campaign of photometric observations of the Galilean satellites of Jupiter in 2009. Compared with the theory, for successful observations, the r.m.s. of O–C residuals are equal to 45.8 mas and 81.1 mas in right ascension and declination, respectively; the mean O–C residuals are equal to –2 mas and –9 mas in right ascension and declination, respectively, for mutual occultations; and –6 mas and +1 mas in right ascension and declination, respectively, for mutual eclipses