Partial substitution of anthracite for coke breeze in iron ore sintering

Abstract In the sintering of iron ores, the partial substitution of anthracite for coke breeze has been considered to be an effective way of reducing pollutant emissions and production cost. In this study, the basic characteristics of anthracite and coke breeze were compared and the sintering perfor...

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Autores principales:	Xin Zhang, Qiang Zhong, Chen Liu, Mingjun Rao, Zhiwei Peng, Guanghui Li, Tao Jiang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/698dccfb87b64b36ae1c9667a8cb06ef
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spelling	oai:doaj.org-article:698dccfb87b64b36ae1c9667a8cb06ef2021-12-02T14:12:09ZPartial substitution of anthracite for coke breeze in iron ore sintering10.1038/s41598-021-80992-42045-2322https://doaj.org/article/698dccfb87b64b36ae1c9667a8cb06ef2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-80992-4https://doaj.org/toc/2045-2322Abstract In the sintering of iron ores, the partial substitution of anthracite for coke breeze has been considered to be an effective way of reducing pollutant emissions and production cost. In this study, the basic characteristics of anthracite and coke breeze were compared and the sintering performance at different substitution ratios of anthracite for coke breeze was investigated. The porosity of anthracite is lower than that of coke breeze, but its density and combustion reactivity are higher. The substitution of anthracite for coke breeze has no influence on the granulation effect of the sintering blend. As the anthracite proportion increased, the sintering speed and productivity increased and the sintering yield and tumbler index decreased. As the substitution ratio increased from 0 to 60%, the melting temperature duration and the melt quantity index decreased from 2.59 to 2.03 min and from 3218.28 to 2405.75 °C·min, respectively, leading to insufficient sintering mineralization and bad sintering indexes. For an anthracite substitution ratio of 40%, the sintering speed, sintering productivity, sintering yield and tumbler index were 22.34 mm min−1, 1.49 t·(m2 h)−1, 71.65% and 63.59%, respectively, which entirely satisfies the production requirements. Furthermore, hematite (Fe2O3), calcium ferrite (CaO–Fe2O3), and compound calcium ferrite (CaO–SiO2–Fe2O3) were the major mineral phases, which were embedded with an interwoven structure.Xin ZhangQiang ZhongChen LiuMingjun RaoZhiwei PengGuanghui LiTao JiangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xin Zhang Qiang Zhong Chen Liu Mingjun Rao Zhiwei Peng Guanghui Li Tao Jiang Partial substitution of anthracite for coke breeze in iron ore sintering
description	Abstract In the sintering of iron ores, the partial substitution of anthracite for coke breeze has been considered to be an effective way of reducing pollutant emissions and production cost. In this study, the basic characteristics of anthracite and coke breeze were compared and the sintering performance at different substitution ratios of anthracite for coke breeze was investigated. The porosity of anthracite is lower than that of coke breeze, but its density and combustion reactivity are higher. The substitution of anthracite for coke breeze has no influence on the granulation effect of the sintering blend. As the anthracite proportion increased, the sintering speed and productivity increased and the sintering yield and tumbler index decreased. As the substitution ratio increased from 0 to 60%, the melting temperature duration and the melt quantity index decreased from 2.59 to 2.03 min and from 3218.28 to 2405.75 °C·min, respectively, leading to insufficient sintering mineralization and bad sintering indexes. For an anthracite substitution ratio of 40%, the sintering speed, sintering productivity, sintering yield and tumbler index were 22.34 mm min−1, 1.49 t·(m2 h)−1, 71.65% and 63.59%, respectively, which entirely satisfies the production requirements. Furthermore, hematite (Fe2O3), calcium ferrite (CaO–Fe2O3), and compound calcium ferrite (CaO–SiO2–Fe2O3) were the major mineral phases, which were embedded with an interwoven structure.
format	article
author	Xin Zhang Qiang Zhong Chen Liu Mingjun Rao Zhiwei Peng Guanghui Li Tao Jiang
author_facet	Xin Zhang Qiang Zhong Chen Liu Mingjun Rao Zhiwei Peng Guanghui Li Tao Jiang
author_sort	Xin Zhang
title	Partial substitution of anthracite for coke breeze in iron ore sintering
title_short	Partial substitution of anthracite for coke breeze in iron ore sintering
title_full	Partial substitution of anthracite for coke breeze in iron ore sintering
title_fullStr	Partial substitution of anthracite for coke breeze in iron ore sintering
title_full_unstemmed	Partial substitution of anthracite for coke breeze in iron ore sintering
title_sort	partial substitution of anthracite for coke breeze in iron ore sintering
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/698dccfb87b64b36ae1c9667a8cb06ef
work_keys_str_mv	AT xinzhang partialsubstitutionofanthraciteforcokebreezeinironoresintering AT qiangzhong partialsubstitutionofanthraciteforcokebreezeinironoresintering AT chenliu partialsubstitutionofanthraciteforcokebreezeinironoresintering AT mingjunrao partialsubstitutionofanthraciteforcokebreezeinironoresintering AT zhiweipeng partialsubstitutionofanthraciteforcokebreezeinironoresintering AT guanghuili partialsubstitutionofanthraciteforcokebreezeinironoresintering AT taojiang partialsubstitutionofanthraciteforcokebreezeinironoresintering
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Partial substitution of anthracite for coke breeze in iron ore sintering

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