Preliminary Chemical Activation of Ash Waste with Release of Carbon Concentrate

Описание

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3303/CET2188162

Аннотация: 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 strПоказать полностьюucture. 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 © 2021, AIDIC ServiziS.r.l.

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Издание

Журнал: Chemical Engineering Transactions

Выпуск журнала: Vol. 88

Номера страниц: 973-978

ISSN журнала: 22839216

Издатель: Italian Association of Chemical Engineering - AIDIC

Персоны

  • Bakirov A. (Priority Department Centre «Veritas», D. Serikbayev East Kazakhstan Technical University, 19, Serikbayev str., Ust-Kamenogorsk, 070000, Kazakhstan)
  • Abdulina S. (Priority Department Centre «Veritas», D. Serikbayev East Kazakhstan Technical University, 19, Serikbayev str., Ust-Kamenogorsk, 070000, Kazakhstan)
  • Zhunusov A. (Department of Metallurgy, Toraighyrov University, Lomov Street, 64, Pavlodar, 140008, Kazakhstan)
  • Oleinikova N. (School of Non-Ferrous Metals and Material Science, Siberian Federal University, "Krasnoyarsk worker", 95, Krasnoyarsk, 660025, Russian Federation)

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