Preliminary Chemical Activation of Ash Waste with Release of Carbon Concentrate
Bakirov A. Abdulina S. Zhunusov A. Oleinikova N.
2021Italian Association of Chemical Engineering - AIDIC
Chemical Engineering Transactions
2021#88973 - 978 pp.
Research has been carried out to obtain carbonaceous concentrate from ash from the combustion of Ekibastuz coals by the flotation method. To increase the efficiency of flotation, a preliminary chemical activation of ash in a sodium bicarbonate solution was used, which made it possible to change the phase composition and mineral structure. Upon activation, the phases of aluminum silicate-silymanite and hedenbergite disappeared, changes occurred in mullite towards a decrease in the content of silica in it, the content of free silica increased from 8.7 to 36.1 %, and the calcite phase appeared. As a result of studies, it was determined that the optimal temperature of chemical activation is 150 °C, a further increase in temperature leads to insignificant changes in the phase composition. At a temperature of 150 °C, phase transformations in ash are completed with a duration of 60 - 90 min. After chemical activation of the ash, the carbon content in the carbonaceous concentrate obtained during flotation doubled. The richest carbonaceous concentrate with a carbon content of 52.9 % was obtained using kerosene and MIBC (Methylisobutylcarbinol). Copyright
Text of the article Перейти на текст статьи
Priority Department Centre «Veritas», D. Serikbayev East Kazakhstan Technical University, 19, Serikbayev str., Ust-Kamenogorsk, 070000, Kazakhstan
Department of Metallurgy, Toraighyrov University, Lomov Street, 64, Pavlodar, 140008, Kazakhstan
School of Non-Ferrous Metals and Material Science, Siberian Federal University, Krasnoyarsk worker, 95, Krasnoyarsk, 660025, Russian Federation
Priority Department Centre «Veritas»
Department of Metallurgy
School of Non-Ferrous Metals and Material Science
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026