Characterization of Waste Sludge Pigment from Production of ZnCl2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10248007" target="_blank" >RIV/61989100:27360/21:10248007 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/21:10248007 RIV/61989100:27710/21:10248007 RIV/61989100:27740/21:10248007

Výsledek na webu

<a href="https://www.mdpi.com/2075-163X/11/3/313" target="_blank" >https://www.mdpi.com/2075-163X/11/3/313</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min11030313" target="_blank" >10.3390/min11030313</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization of Waste Sludge Pigment from Production of ZnCl2

Popis výsledku v původním jazyce

This study is focused on the treatment of waste sludge from a zinc chloride production in order to prepare iron-rich pigments usable for a production of glazes. In galvanizing plants, yellow waste sludge containing significant amount of ZnO, Cl, and Fe2O3, is formed. This raw waste sludge cannot be used as a pigment in glaze. Therefore, three methods of treating this material were proposed: (a) washing with H2O, (b) calcination at 180 degrees C and washing by H2O, and (c) calcination at 900 degrees C and washing by H2O. These methods helped to reduce Zn and Cl content up to 97%. According to X-ray fluorescence analysis percentage of Fe2O3 increased from similar to 41% to similar to 98%. X-ray power diffraction analysis confirmed the formation of alpha-Fe2O3 (hematite) in the pigment prepared. Scanning electron microscopy with Energy dispersive X-ray analysis showed clusters of rounded particles, and also the change in size of particles after calcination was observed. Particle size, specific surface area, and density measurements together with thermogravimetric and differential thermal analyses were performed. Pigments prepared from the waste sludge were added to transparent glaze in amounts of 1, 5, 10, and 15 wt.%. Pigment-containing glazes were applied by spraying on fired ceramic tiles and then fired at 1060 degrees C. Color of glazes was determined by (Commission Internationale de l&apos;Eclairage) CIE L*a*b* coordinates as colorless, light brown shades, brown-red, brown-yellow, and deep red-brown. Comparison with colors of glazes prepared using commercial pigments was also performed. Waste sludge can be used to prepare pigments and glazes containing pigments as an alternative to commercial products.

Název v anglickém jazyce

Characterization of Waste Sludge Pigment from Production of ZnCl2

Popis výsledku anglicky

This study is focused on the treatment of waste sludge from a zinc chloride production in order to prepare iron-rich pigments usable for a production of glazes. In galvanizing plants, yellow waste sludge containing significant amount of ZnO, Cl, and Fe2O3, is formed. This raw waste sludge cannot be used as a pigment in glaze. Therefore, three methods of treating this material were proposed: (a) washing with H2O, (b) calcination at 180 degrees C and washing by H2O, and (c) calcination at 900 degrees C and washing by H2O. These methods helped to reduce Zn and Cl content up to 97%. According to X-ray fluorescence analysis percentage of Fe2O3 increased from similar to 41% to similar to 98%. X-ray power diffraction analysis confirmed the formation of alpha-Fe2O3 (hematite) in the pigment prepared. Scanning electron microscopy with Energy dispersive X-ray analysis showed clusters of rounded particles, and also the change in size of particles after calcination was observed. Particle size, specific surface area, and density measurements together with thermogravimetric and differential thermal analyses were performed. Pigments prepared from the waste sludge were added to transparent glaze in amounts of 1, 5, 10, and 15 wt.%. Pigment-containing glazes were applied by spraying on fired ceramic tiles and then fired at 1060 degrees C. Color of glazes was determined by (Commission Internationale de l&apos;Eclairage) CIE L*a*b* coordinates as colorless, light brown shades, brown-red, brown-yellow, and deep red-brown. Comparison with colors of glazes prepared using commercial pigments was also performed. Waste sludge can be used to prepare pigments and glazes containing pigments as an alternative to commercial products.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/EF17_049%2F0008426" target="_blank" >EF17_049/0008426: Výzkum způsobů nakládání s odpady, materiály a vedlejšími produkty hutních a souvisejících provozů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Minerals

ISSN

2075-163X

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

000633908000001

EID výsledku v databázi Scopus

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