Wet Pre-treatment Methods in Macroelements Recovery from Fly Ash Combined with Acid Leaching

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F20%3APU139406" target="_blank" >RIV/00216305:26310/20:PU139406 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstrakty-konference-2020-pdf-p198641" target="_blank" >https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstrakty-konference-2020-pdf-p198641</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Wet Pre-treatment Methods in Macroelements Recovery from Fly Ash Combined with Acid Leaching

Popis výsledku v původním jazyce

Fly ash (FA), as a mass-produced secondary material (coal combustion product) since the middle of the last century, reached up to 30–40 % to be recycled and reused. One of the most auspicious applications of FA in the following decades possibly appears to be a raw material base – the source of macro- and microelements. This paper summarizes wet types of FA pre-treating techniques to obtain the maximum leachability of macro- elements, such as Al, Fe and Ti in the process of acid leaching. FA pre-treatment or chemical activation is the single key to increase the efficiency of separated elements. In this research, the wet experiment was based on FA pre-leaching in hydrochloric acid solution (1–5 wt. %). Both high-temperature (HTFA) and fluidized-bed fly and bottom ash (FFA. FBA) were the aims of the study. In the case of FBA and FFA, this reaction led to lower the total alkaline content, esp. reactive calcium oxide, as a result of flue gas desulphurization. The lower free lime content brings a positive e

Název v anglickém jazyce

Wet Pre-treatment Methods in Macroelements Recovery from Fly Ash Combined with Acid Leaching

Popis výsledku anglicky

Fly ash (FA), as a mass-produced secondary material (coal combustion product) since the middle of the last century, reached up to 30–40 % to be recycled and reused. One of the most auspicious applications of FA in the following decades possibly appears to be a raw material base – the source of macro- and microelements. This paper summarizes wet types of FA pre-treating techniques to obtain the maximum leachability of macro- elements, such as Al, Fe and Ti in the process of acid leaching. FA pre-treatment or chemical activation is the single key to increase the efficiency of separated elements. In this research, the wet experiment was based on FA pre-leaching in hydrochloric acid solution (1–5 wt. %). Both high-temperature (HTFA) and fluidized-bed fly and bottom ash (FFA. FBA) were the aims of the study. In the case of FBA and FFA, this reaction led to lower the total alkaline content, esp. reactive calcium oxide, as a result of flue gas desulphurization. The lower free lime content brings a positive e

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů