Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process

The oxidation roasting of vanadium–titanium magnetite (VTM) pellets with a new composite binder was investigated using a pilot-scale straight-grate. The evolution of the chemical and phase composition, the compressive strength, and the metallurgical properties of the fired VTM pellets were investiga...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yihui Yi, Guanghui Li, Pengxu Cao, Xin Zhang, Yongkang Zhang, Jin Zhang, Jiahao Huang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	humic acid binder oxidation roasting vanadium-titanium magnetite pellets straight-grate process Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/fc92d09ebd4644a7863586f5ed08571b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:fc92d09ebd4644a7863586f5ed08571b
record_format	dspace
spelling	oai:doaj.org-article:fc92d09ebd4644a7863586f5ed08571b2021-11-25T17:17:39ZEffect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process10.3390/cryst111112832073-4352https://doaj.org/article/fc92d09ebd4644a7863586f5ed08571b2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1283https://doaj.org/toc/2073-4352The oxidation roasting of vanadium–titanium magnetite (VTM) pellets with a new composite binder was investigated using a pilot-scale straight-grate. The evolution of the chemical and phase composition, the compressive strength, and the metallurgical properties of the fired VTM pellets were investigated. Under a preheating temperature of 950 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula>C, a preheating time of 18 min, a firing temperature of 1300 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula>C, and a firing time of 10 min, the compressive strength of the fired pellets was as high as 2344 N per pellet. The fired pellets mainly consisted of hematite, pseudobrookite, spinel and olivine. The total iron content of the fired pellets was 0.97% higher using 0.75 wt% humic acid (HA) binder instead of 1.5 wt% bentonite binder. These properties are beneficial for the production efficiency and energy efficiency of their subsequent use in blast furnaces. Moreover, both the softening interval and the softening melting interval of the HA binder pellets were narrower than those of the bentonite binder pellets, conducive to the smooth and successful smelting of the VTM pellets in a blast furnace.Yihui YiGuanghui LiPengxu CaoXin ZhangYongkang ZhangJin ZhangJiahao HuangMDPI AGarticlehumic acid binderoxidation roastingvanadium-titanium magnetite pelletsstraight-grate processCrystallographyQD901-999ENCrystals, Vol 11, Iss 1283, p 1283 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	humic acid binder oxidation roasting vanadium-titanium magnetite pellets straight-grate process Crystallography QD901-999
spellingShingle	humic acid binder oxidation roasting vanadium-titanium magnetite pellets straight-grate process Crystallography QD901-999 Yihui Yi Guanghui Li Pengxu Cao Xin Zhang Yongkang Zhang Jin Zhang Jiahao Huang Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
description	The oxidation roasting of vanadium–titanium magnetite (VTM) pellets with a new composite binder was investigated using a pilot-scale straight-grate. The evolution of the chemical and phase composition, the compressive strength, and the metallurgical properties of the fired VTM pellets were investigated. Under a preheating temperature of 950 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula>C, a preheating time of 18 min, a firing temperature of 1300 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula>C, and a firing time of 10 min, the compressive strength of the fired pellets was as high as 2344 N per pellet. The fired pellets mainly consisted of hematite, pseudobrookite, spinel and olivine. The total iron content of the fired pellets was 0.97% higher using 0.75 wt% humic acid (HA) binder instead of 1.5 wt% bentonite binder. These properties are beneficial for the production efficiency and energy efficiency of their subsequent use in blast furnaces. Moreover, both the softening interval and the softening melting interval of the HA binder pellets were narrower than those of the bentonite binder pellets, conducive to the smooth and successful smelting of the VTM pellets in a blast furnace.
format	article
author	Yihui Yi Guanghui Li Pengxu Cao Xin Zhang Yongkang Zhang Jin Zhang Jiahao Huang
author_facet	Yihui Yi Guanghui Li Pengxu Cao Xin Zhang Yongkang Zhang Jin Zhang Jiahao Huang
author_sort	Yihui Yi
title	Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
title_short	Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
title_full	Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
title_fullStr	Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
title_full_unstemmed	Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
title_sort	effect of humic acid binder on oxidation roasting of vanadium–titanium magnetite pellets via straight-grate process
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fc92d09ebd4644a7863586f5ed08571b
work_keys_str_mv	AT yihuiyi effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess AT guanghuili effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess AT pengxucao effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess AT xinzhang effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess AT yongkangzhang effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess AT jinzhang effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess AT jiahaohuang effectofhumicacidbinderonoxidationroastingofvanadiumtitaniummagnetitepelletsviastraightgrateprocess
_version_	1718412568896208896

Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process

Ejemplares similares