Извлечение глинозема и производство коагулянтов из золошлаков
Организация
ГЕОХИ РАН
Руководитель проекта
Валеев Дмитрий Вадимович, к.т.н.
Место реализации
Россия, Москва, улица Косыгина, 19, стр. 1
Уровень технологической готовности
НИР
Лабораторная установка
Опытно-промышленная установка
Промышленное внедрение
Описание технологии
Используемые вторичные ресурсы
Зола-уноса
Итоговая продукция
- Коагулянт
- Металлургический глинозем
Область применения
Металлургия
Химическая отрасль
Производственная мощность использования вторичных ресурсов
0,1 кг/ч - переработка золы, 25 г/ч - производство продукции (мощность лабораторной установки)
Этапы технологического процесса
- Обработка золы раствором щелочи для растворения аморфной стекловидной фазы золы, 50% кремния переходит в раствор.
- Обработка золы соляной кислотой 20-30% в реакторе высокого давления, степень извлечения Al составляет 80-90%.
- Осаждение 99% гексагидрата хлорида алюминия и его обжиг при Т = 300-800 °С
- Переосаждение аморфного оксида алюминия в процессе декомпозиции гидроксида алюминия при Т = 60 °С и продолжительности 36 ч.
- Кальцинация гидроксида алюминия в трубчатой печи при Т = 1000 °С и продолжительности 2 ч.
Научно-технические достижения
SiC Ceramics Production by Spark Plasma Sintering from a Coal Fly Ash Residue after High-Pressure NH4HSO4-and-H2SO4 Leaching
Valeev D. et al. SiC Ceramics Production by Spark Plasma Sintering from a Coal Fly Ash Residue after High-Pressure NH4HSO4-and-H2SO4 Leaching // Ceramics International. 2024. Vol. 50. No. 14. p. 26109-26121. Подробнее
Kinetics of Aluminum and Scandium Extraction from Desilicated Coal Fly Ash by High-Pressure HCl Leaching
Shoppert A., Valeev D., Loginova I. Kinetics of Aluminum and Scandium Extraction from Desilicated Coal Fly Ash by High-Pressure HCl Leaching // Metals. 2023. Vol. 13. No. 12. p. 1994. Подробнее
Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation
Shoppert A., Valeev D., Loginova I., Chaikin L., Pan J. Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation // Metals. 2023. Vol. 13. No. 10. p. 1647. Подробнее
Study on leaching behavior differences of rare earth elements from coal fly ash during microwave-assisted HCl leaching
Chen H., Wen Z., Pan J., Zhang L., He X., Valeev D., Zhou C. Study on leaching behavior differences of rare earth elements from coal fly ash during microwave-assisted HCl leaching // International Journal of Coal Preparation and Utilization. 2023. Vol. 43. No. 11. pp. 1993-2015. Подробнее
Rare-Earth Element Extraction from Low-Alkali Desilicated Coal Fly Ash by (NH4)2SO4 + H2SO4
Shoppert A., Valeev D. et al. Rare-Earth Element Extraction from Low-Alkali Desilicated Coal Fly Ash by (NH4)2SO4 + H2SO4 // Materials. 2022. Vol. 16. No. 1. p. 6. Подробнее
The Discrepancy between Coal Ash from Muffle, Circulating Fluidized Bed (CFB), and Pulverized Coal (PC) Furnaces, with a Focus on the Recovery of Iron and Rare Earth Elements
Pan J., Long X., Zhang L., Shoppert A., Valeev D., Zhou C., Liu X. The Discrepancy between Coal Ash from Muffle, Circulating Fluidized Bed (CFB), and Pulverized Coal (PC) Furnaces, with a Focus on the Recovery of Iron and Rare Earth Elements // Materials. 2022. Vol. 15. No. 23. p. 8494. Подробнее
A review of the alumina production from coal fly ash, with a focus in Russia
Valeev D., Bobylev P., Osokin N. A., Zolotova I. Y., Rodionov I., Salazar Concha C., Verichev K. A review of the alumina production from coal fly ash, with a focus in Russia // Journal of Cleaner Production. 2022. Vol. 363. p. 132360. Подробнее
Kinetics Study of Al Extraction from Desilicated Coal Fly Ash by NaOH at Atmospheric Pressure
Shoppert A., Loginova I., Valeev D. Kinetics Study of Al Extraction from Desilicated Coal Fly Ash by NaOH at Atmospheric Pressure // Materials. 2021. Vol. 14. No. 24. p. 7700. Подробнее
Complete Extraction of Amorphous Aluminosilicate from Coal Fly Ash by Alkali Leaching under Atmospheric Pressure
Shoppert A., Valeev D., Loginova I., Chaikin L. Complete Extraction of Amorphous Aluminosilicate from Coal Fly Ash by Alkali Leaching under Atmospheric Pressure // Metals. 2020. Vol. 10. No. 12. p. 1684. Подробнее
High-pressure HCl leaching of coal ash to extract Al into a chloride solution with further use as a coagulant for water treatment
Valeev D., Kunilova I., Shoppert A., Salazar Concha C., Kondratiev A. High-pressure HCl leaching of coal ash to extract Al into a chloride solution with further use as a coagulant for water treatment // Journal of Cleaner Production. 2020. Vol. 276. p. 123206. Подробнее
Acid and Acid-Alkali Treatment Methods of Al-Chloride Solution Obtained by the Leaching of Coal Fly Ash to Produce Sandy Grade Alumina
Valeev D., Shoppert A., Mikhailova A., Kondratiev A. Acid and Acid-Alkali Treatment Methods of Al-Chloride Solution Obtained by the Leaching of Coal Fly Ash to Produce Sandy Grade Alumina // Metals. 2020. Vol. 10. No. 5. p. 585. Подробнее
Magnetite and Carbon Extraction from Coal Fly Ash Using Magnetic Separation and Flotation Methods
Valeev D. et al. Magnetite and Carbon Extraction from Coal Fly Ash Using Magnetic Separation and Flotation Methods // Minerals. 2019. Vol. 9. No. 5. p. 320. Подробнее
Complex utilisation of ekibastuz brown coal fly ash: Iron & carbon separation and aluminum extraction
Valeev D. et al. Complex utilisation of ekibastuz brown coal fly ash: Iron & carbon separation and aluminum extraction // Journal of Cleaner Production. 2019. Vol. 218. pp. 192-201. Подробнее
Kinetics of Iron Extraction from Coal Fly Ash by Hydrochloric Acid Leaching
Valeev D., Mikhailova A., Atmadzhidi A. Kinetics of Iron Extraction from Coal Fly Ash by Hydrochloric Acid Leaching // Metals. 2018. Vol. 8. No. 7. p. 533. Подробнее
