Possibilities of fly ash activation in alumina recovery process
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F19%3APU133431" target="_blank" >RIV/00216305:26310/19:PU133431 - isvavai.cz</a>
Výsledek na webu
<a href="https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012003" target="_blank" >https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1757-899X/583/1/012003" target="_blank" >10.1088/1757-899X/583/1/012003</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Possibilities of fly ash activation in alumina recovery process
Popis výsledku v původním jazyce
This paper summarises various possibilities of high-temperature fly ash (HTA) and fluidised-bed filter ash (FFA) activation in metal and oxides recovery processes (esp. alumina recovery). The study deals with chemical and phase composition ash modification to improve leachability of aluminium compounds into sulphuric acid solution. Samples of HTA and FFA produced by power plant industry in the Czech Republic were subjected to diverse types of modification, such as sulphuric acid concentration, ash/acid ratio and sintering reactions using several types of solid agents. Sintering reaction were based on forming acid soluble calcium aluminates via donating the system with calcium oxide, - carbonate and - chloride. Phase and chemical composition were characterised by means of XRD and XRF analysis and the concentration of Al in acid solutions via ICP-OES. Appropriate modification of input material by high-temperature sintering reaction using calcium chloride combined with extraction into 10 wt.% sulphuric acid leads to dissolution up to 99 % of aluminium from FFA and up to 94 % form HTA. At least, irreplaceable dopant for cement production – gypsum, is formed as a by-product of leaching.
Název v anglickém jazyce
Possibilities of fly ash activation in alumina recovery process
Popis výsledku anglicky
This paper summarises various possibilities of high-temperature fly ash (HTA) and fluidised-bed filter ash (FFA) activation in metal and oxides recovery processes (esp. alumina recovery). The study deals with chemical and phase composition ash modification to improve leachability of aluminium compounds into sulphuric acid solution. Samples of HTA and FFA produced by power plant industry in the Czech Republic were subjected to diverse types of modification, such as sulphuric acid concentration, ash/acid ratio and sintering reactions using several types of solid agents. Sintering reaction were based on forming acid soluble calcium aluminates via donating the system with calcium oxide, - carbonate and - chloride. Phase and chemical composition were characterised by means of XRD and XRF analysis and the concentration of Al in acid solutions via ICP-OES. Appropriate modification of input material by high-temperature sintering reaction using calcium chloride combined with extraction into 10 wt.% sulphuric acid leads to dissolution up to 99 % of aluminium from FFA and up to 94 % form HTA. At least, irreplaceable dopant for cement production – gypsum, is formed as a by-product of leaching.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
10402 - Inorganic and nuclear chemistry
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2019
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
International Conference Building Materials, Products and Technologies
ISBN
—
ISSN
1757-899X
e-ISSN
—
Počet stran výsledku
8
Strana od-do
1-8
Název nakladatele
IOP Conference Series: Materials Science and Engineering
Místo vydání
neuveden
Místo konání akce
Lednice
Datum konání akce
4. 6. 2019
Typ akce podle státní příslušnosti
EUR - Evropská akce
Kód UT WoS článku
—