Environmental characterization of ferrochromium production waste (refined slag) and its carbonization product

This paper presents the results of research on the method of utilization of self-disintegrating slags of refined ferrochrome production by autoclave carbonization in carbon dioxide environment. The work has a complex character, including earlier laboratory studies of the slag carbonization process u...

Full description

Saved in:

Bibliographic Details
Published in:	Heliyon Vol. 10; no. 9; p. e30789
Main Authors:	Sariyev, O., Kelamanov, B., Dossekenov, M., Davletova, A., Kuatbay, Ye, Zhuniskaliyev, T., Abdirashit, A., Gasik, Michael
Format:	Journal Article
Language:	English
Published:	England Elsevier Ltd 15-05-2024 Elsevier
Subjects:	Carbon dioxide Carbonization Metallurgy Recycling Refined ferrochromium Self-crumbling slag Carbonization Self-crumbling slag Metallurgy Recycling Refined ferrochromium Carbon dioxide
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	This paper presents the results of research on the method of utilization of self-disintegrating slags of refined ferrochrome production by autoclave carbonization in carbon dioxide environment. The work has a complex character, including earlier laboratory studies of the slag carbonization process under different conditions, as well as studies of chemical and mineralogical composition of initial waste slags taken from the slag dump and samples of bricks subjected to carbonization. The composition of slags and obtained products was investigated by XRD, DTA, DTG and XRF analyses, which showed that the main phases of the studied samples are dicalcium silicate, montichelite, periclase, magnesiochromite, calcite. Thermal analytical studies showed that magnesium carbonate is present only in the samples of artificially carbonized material. Also, the process of carbonate formation in the thickness of bricks during forced carbonization was investigated. As a result, it was obtained that with increasing CO2 pressure, the amount of bound carbon in the products increases proportionally in all layers. It was determined that the amount of CO2 absorbed during carbonization can reach 20 % of the mass of the initial slag. Stale slag can be used simultaneously as a carbon dioxide absorber and as a building product.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 All corresponding authors contributed equally to this manuscript.
ISSN:	2405-8440 2405-8440
DOI:	10.1016/j.heliyon.2024.e30789