Cargando…

Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization

The present study firstly proposed a method of integrated utilization of sewage sludge (SS) and coal gangue (CG), two waste products, for cement clinker products with the aim of heat recovery and environment protection. The results demonstrated that the incremental amounts of SS and CG addition was...

Descripción completa

Detalles Bibliográficos
Autores principales: Yang, Zhenzhou, Zhang, Yingyi, Liu, Lili, Seetharaman, Seshadri, Wang, Xidong, Zhang, Zuotai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502968/
https://www.ncbi.nlm.nih.gov/pubmed/28773400
http://dx.doi.org/10.3390/ma9040275
_version_ 1783249014586605568
author Yang, Zhenzhou
Zhang, Yingyi
Liu, Lili
Seetharaman, Seshadri
Wang, Xidong
Zhang, Zuotai
author_facet Yang, Zhenzhou
Zhang, Yingyi
Liu, Lili
Seetharaman, Seshadri
Wang, Xidong
Zhang, Zuotai
author_sort Yang, Zhenzhou
collection PubMed
description The present study firstly proposed a method of integrated utilization of sewage sludge (SS) and coal gangue (CG), two waste products, for cement clinker products with the aim of heat recovery and environment protection. The results demonstrated that the incremental amounts of SS and CG addition was favorable for the formation of tricalcium silicate (C(3)S) during the calcinations, but excess amount of SS addition could cause the impediment effect on C(3)S formation. Furthermore, it was also observed that the C(3)S polymorphs showed the transition from rhombohedral to monoclinic structure as SS addition was increased to 15 wt %. During the calcinations, most of trace elements could be immobilized especially Zn and cannot be easily leached out. Given the encouraging results in the present study, the co-process of sewage sludge and coal gangue in the cement kiln can be expected with a higher quality of cement products and minimum pollution to the environment.
format Online
Article
Text
id pubmed-5502968
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-55029682017-07-28 Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization Yang, Zhenzhou Zhang, Yingyi Liu, Lili Seetharaman, Seshadri Wang, Xidong Zhang, Zuotai Materials (Basel) Article The present study firstly proposed a method of integrated utilization of sewage sludge (SS) and coal gangue (CG), two waste products, for cement clinker products with the aim of heat recovery and environment protection. The results demonstrated that the incremental amounts of SS and CG addition was favorable for the formation of tricalcium silicate (C(3)S) during the calcinations, but excess amount of SS addition could cause the impediment effect on C(3)S formation. Furthermore, it was also observed that the C(3)S polymorphs showed the transition from rhombohedral to monoclinic structure as SS addition was increased to 15 wt %. During the calcinations, most of trace elements could be immobilized especially Zn and cannot be easily leached out. Given the encouraging results in the present study, the co-process of sewage sludge and coal gangue in the cement kiln can be expected with a higher quality of cement products and minimum pollution to the environment. MDPI 2016-04-07 /pmc/articles/PMC5502968/ /pubmed/28773400 http://dx.doi.org/10.3390/ma9040275 Text en © 2016 by the authors; Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Zhenzhou
Zhang, Yingyi
Liu, Lili
Seetharaman, Seshadri
Wang, Xidong
Zhang, Zuotai
Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization
title Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization
title_full Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization
title_fullStr Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization
title_full_unstemmed Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization
title_short Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization
title_sort integrated utilization of sewage sludge and coal gangue for cement clinker products: promoting tricalcium silicate formation and trace elements immobilization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502968/
https://www.ncbi.nlm.nih.gov/pubmed/28773400
http://dx.doi.org/10.3390/ma9040275
work_keys_str_mv AT yangzhenzhou integratedutilizationofsewagesludgeandcoalgangueforcementclinkerproductspromotingtricalciumsilicateformationandtraceelementsimmobilization
AT zhangyingyi integratedutilizationofsewagesludgeandcoalgangueforcementclinkerproductspromotingtricalciumsilicateformationandtraceelementsimmobilization
AT liulili integratedutilizationofsewagesludgeandcoalgangueforcementclinkerproductspromotingtricalciumsilicateformationandtraceelementsimmobilization
AT seetharamanseshadri integratedutilizationofsewagesludgeandcoalgangueforcementclinkerproductspromotingtricalciumsilicateformationandtraceelementsimmobilization
AT wangxidong integratedutilizationofsewagesludgeandcoalgangueforcementclinkerproductspromotingtricalciumsilicateformationandtraceelementsimmobilization
AT zhangzuotai integratedutilizationofsewagesludgeandcoalgangueforcementclinkerproductspromotingtricalciumsilicateformationandtraceelementsimmobilization