Hydrophobization of the surface of mineral forms of clay sands during cryogenic treatment: mechanism and consequences in the field of disintegration and enrichment
Гидрофобизация поверхности минеральных форм глинистых песков при криогенной обработке: механизм и последствия в области дезинтеграции и обогащения
Hydrophobization of the surface of mineral forms of clay sands during cryogenic treatment: mechanism and consequences in the field of disintegration and enrichment
Статья в журнале
Русский
622.75/.77
промывка; глинистые пески; обогащение; дезинтеграция; криогенная обработка; washing; clay sands; enrichment; disintegration; cryogenic treatment
Горное дело / Грунтоведение
С. 230-234
Успехи современного естествознания = Advances in current natural sciences: научный журнал
Москва, Издательский дом "Академия Естествознания"
Основан в 2001 г.
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В журнале публикуются статьи, обладающие научной новизной, представляющие собой результаты завершенных исследований, проблемного или научно-практического характера. Журнал ориентируется на профессиональных работников сельского хозяйства, экологов, медицины, научных сотрудников, педагогов, специалистов в смежных областях знаний, занимающихся изучением наук о земле.
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Успехи современного естествознания / учредитель: издательский дом "Академия Естествознания" ; главный редактор М. Ю. Ледванов. – Москва : Издательский дом "Академия Естествознания", 2023, – N 12. – 249 с.
The article is devoted to the study of the effects of cryogenic treatment on the hydrophobic and hydrophilic properties of clay sands in order to increase the efficiency of their disintegration and enrichment processes. Experiments have shown that cryogenic treatment leads to selective destruction of dispersed formations, where processes occur that precede the process of disintegration, in which the weakest mechanical bonds are broken, and at the same time passivation of surface energy occurs, which is proved by experimental studies to establish the phenomenon of hydrophobization of the surface of finely dispersed mineral particles. The mechanism of this process is due to complex cyclic phenomena of cryogenic treatment, such as crystallization and recrystallization of water in microcracks and pores of dispersed particles. As a result of the cumulative effect, new pores and spaces are formed inside the conglomerates, which, upon subsequent freezing, forms a new ice structure that contributes to the rupture of the conglomerate. An important factor in the efficiency of cryoprocessing is the pre-saturation of samples with water, which gives the disintegration a volumetric character. The research methodology included the use of a new method of direct flotation without collectors, which makes it possible to assess the hydrophobicity of particles. The experiments were carried out on a laboratory flotation machine using a foaming agent to intensify the flotation process. Samples with a certain initial humidity were cryogenically processed using freeze-thaw cycles. The yield of the foam product was studied depending on the number of cycles and the use of the foaming agent. Studies have revealed stable dynamics of the hydrophobization process, with an increase in the disintegration effect from cycle to cycle. Cryogenic treatment, by breaking the bonds between the particles and opening the pores, allows air bubbles to fix on the surface of the particles, enhancing the process of disintegration in the water-air environment. The phenomenon of hydrophobization during cryogenic treatment explains the high disintegration effect of high-clay sands in the water-air environment. The work was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (topic No. 0297-2021-0022, Unified state information system for recording the results of research and development work No. 122011800089-2) using the equipment of the Center for Collective Use of the Federal research center ҺYakut Scientific Center of the Siberian Branch of the Russian Academy of Sciencesһ (grant No. 13.TSKP.21.0016).
Ширман, Г. В. Гидрофобизация поверхности минеральных форм глинистых песков при криогенной обработке: механизм и последствия в области дезинтеграции и обогащения / Ширман Г. В. ; Институт горного дела Севера им. Н. В. Черского // Успехи современного естествознания. - 2023. - N 12. - С. 230-234. - DOI: 10.17513/use.38197
DOI: 10.17513/use.38197
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