Distribution of as within magnetic and non-magnetic fractions of fluidized-bed coal combustion ash

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10248478" target="_blank" >RIV/61989100:27360/21:10248478 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2075-163X/11/12/1411" target="_blank" >https://www.mdpi.com/2075-163X/11/12/1411</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min11121411" target="_blank" >10.3390/min11121411</a>

Result language

angličtina

Original language name

Distribution of as within magnetic and non-magnetic fractions of fluidized-bed coal combustion ash

Original language description

Separation of coal ash into magnetic and non-magnetic fractions facilitates their utilization when processed separately. Due to desulphurization additives added to coal during the fluidisedbed combustion, non-magnetic fractions often contain elevated CaO levels (while magnetic concentrates are typically rich in Fe2O3). Both CaO and Fe2O3 are known for their ability to bind As during the combustion, whose distribution is a crucial parameter in terms of proper utilization of these fractions. Therefore, the study deals with the As partitioning within magnetic and non-magnetic fractions of fluidized-bed coal combustion ashes. Two different (successive) procedures of dry magnetic separation were used to separate each ash into strongly magnetic, less magnetic, and a nonmagnetic fraction. Due to their optimal utilization, the concentrations of As and other target elements in these fractions were evaluated and compared. Magnetic concentrates from the first separation step (in vibrofluidized state) contained 60-70% Fe2O3, magnetic concentrates separated manually out of the residues after the first separation contained 26-41% Fe2O3, and the non-magnetic residues contained 2.4-3.5% Fe2O3. Arsenic levels were the highest in the non-magnetic residues and gradually decreased with the increasing Fe2O3 content in the magnetic fractions. The dominant As association in the studied samples was to CaO (r = +0.909) and with SO3 (r = +0.906) whereas its joint occurrence with Fe2O3 was improbable (r = MINUS SIGN 0.834). (C) 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

<a href="/en/project/EF17_049%2F0008426" target="_blank" >EF17_049/0008426: Research on the management of waste, materials and other products of metallurgy and related sectors</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Minerals

ISSN

2075-163X

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

1411

Pages from-to

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UT code for WoS article

000736881700001

EID of the result in the Scopus database

2-s2.0-85121032951