2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2022.52 pmi-15772 https://pmi.spmi.ru/pmi/article/view/15772 Металлургия и обогащение Metallurgy and concentration Assessment of collecting activity of physically sorbed reagents on the example of easily floatable coking coal sludge Оценка собирательной активности физически сорбируемых реагентов на примере легкофлотируемого шлама коксующихся углей Kondratev Sergey A. Кондратьев С. А. Kondratev Sergey A. bagrowa@bk.ru 0000-0002-8245-2259 Институт горного дела им. Н.А.Чинакала СО РАН (Россия) Chinakal Institute of Mining, SB RAS (Russia) Khamzina Tatyana A. Хамзина Т. А. Khamzina Tatyana A. bagrowa@bk.ru 0000-0002-1281-9801 Институт горного дела им. Н.А.Чинакала СО РАН (Россия) Chinakal Institute of Mining, SB RAS (Russia) 03 11 2022 2022 256 549 559 17 03 2022 20 06 2022 03 11 2022 © 2022 С. А. Кондратьев, Т. А. Хамзина © 2022 Sergey A. Kondratev, Tatyana A. Khamzina 2022 С. А. Кондратьев, Т. А. Хамзина Sergey A. Kondratev, Tatyana A. Khamzina Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/15772

В статье приведен один из новых подходов к теоретической оценке собирательной способности реагентов. Исследовалась эффективность действия реагентов-собирателей различного химического состава, применяемых для флотации коксующихся углей. Дана сравнительная оценка флотационной активности керосина, солярового масла, термогазойля, КЭТГОЛ и ФЛОТЭК. Выполнен поиск критериев собирательной активности указанных реагентов-собирателей для флотации угольного шлама. Установлена корреляционная связь показателей флотации угольного шлама указанными реагентами с их физическими параметрами. Показано, что скорость растекания по поверхности воды может характеризовать флотационную активность реагентов. На основании зависимости собирательной активности реагента от скорости его растекания по границе раздела «газ – жидкость» и поверхностного давления могут быть определены основные подходы к определению структуры и состава молекул эффективного флотационного собирателя. Предложена новая концепция выполняемой физически сорбируемым собирателем функции в элементарном акте флотации и критерий флотационной активности реагентов, используемых в обогащении угольных шламов. Показано, что собиратель, используемый во флотации угля, дополнительно к гидрофобизации поверхности извлекаемых частиц должен сокращать время индукции и снимать кинетическое ограничение образованию флотационного агрегата

The article presents one of the new approaches to theoretical assessment of collecting ability of reagents. The efficiency of reagents-collectors with different chemical composition used for flotation of coking coals was studied. A comparative assessment of the flotation activity of kerosene, mineral oil, thermal gas oil, KETGOL and FLOTEK is given. The criteria of collecting activity of the above reagents-collectors for coal sludge flotation were specified. A correlation was established between the indicators of coal sludge flotation by the above reagents and their physical parameters. It is shown that the rate of spreading over water surface can characterize the flotation activity of reagents. Based on dependence of the collecting activity of a reagent on its rate of spreading along the “gas – liquid” interface and surface pressure, the main approaches to determining the structure and composition of molecules of an effective flotation collector can be determined. A new concept of the function performed by a physically sorbed collector in the elementary act of flotation and a criterion for the flotation activity of reagents used in coal sludge beneficiation are proposed. It is shown that the collector used in coal flotation, in addition to hydrophobizing the surface of the extracted particles, should reduce the induction time and remove the kinetic constraint on formation of a flotation aggregate.

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