Processing of blast furnace collector dusts for their utilization in the steel industry

Processing of blast furnace collector dusts for their utilization in the steel industry

The production of pig iron involves the generation of by-products such as collector dusts, which are attractive due to their Fe content. However, they cannot be directly reused because of their high content of Zn and alkalis. Therefore, this research aims to explore their utilization through acid le...

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Autors principals: Acuña Gutiérrez, Iván Omar, Puente Siller, Damaris Margarita, González de la Cruz, José Manuel, Álvarez García, Luis Enrique, López Corpus, Juan Antonio, Perea Garduño, Alberto
Format: Online
Idioma:spa
Publicat: Universidad Autónoma de Baja California 2024
Accés en línia:https://recit.uabc.mx/index.php/revista/article/view/277
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institution RECIT
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language spa
format Online
author Acuña Gutiérrez, Iván Omar
Puente Siller, Damaris Margarita
González de la Cruz, José Manuel
Álvarez García, Luis Enrique
López Corpus, Juan Antonio
Perea Garduño, Alberto
spellingShingle Acuña Gutiérrez, Iván Omar
Puente Siller, Damaris Margarita
González de la Cruz, José Manuel
Álvarez García, Luis Enrique
López Corpus, Juan Antonio
Perea Garduño, Alberto
Processing of blast furnace collector dusts for their utilization in the steel industry
author_facet Acuña Gutiérrez, Iván Omar
Puente Siller, Damaris Margarita
González de la Cruz, José Manuel
Álvarez García, Luis Enrique
López Corpus, Juan Antonio
Perea Garduño, Alberto
author_sort Acuña Gutiérrez, Iván Omar
title Processing of blast furnace collector dusts for their utilization in the steel industry
title_short Processing of blast furnace collector dusts for their utilization in the steel industry
title_full Processing of blast furnace collector dusts for their utilization in the steel industry
title_fullStr Processing of blast furnace collector dusts for their utilization in the steel industry
title_full_unstemmed Processing of blast furnace collector dusts for their utilization in the steel industry
title_sort processing of blast furnace collector dusts for their utilization in the steel industry
description The production of pig iron involves the generation of by-products such as collector dusts, which are attractive due to their Fe content. However, they cannot be directly reused because of their high content of Zn and alkalis. Therefore, this research aims to explore their utilization through acid leaching. To achieve this, a sample was processed through grinding (1h) and low-intensity magnetic separation, and then the effect of hydrochloric acid as a leaching agent was evaluated at each stage of the process (0.10, 0.25, 0.50 and 1.0M HCl). Furthermore, the effect of temperature was analyzed for the system with 1M HCl. The results indicate that working with systems with high HCl concentration in both fresh and ground material made it possible to dissolve up to 65% Zn content in the initial sample (with 38.8% Fe). On the other hand, leaching the magnetically treated dusts achieved Zn solutions of 56% and 65% for 1 and 2 cleaning cycles, respectively. Regarding the Fe content, an increase was observed compared to the initial content, reaching from 53.8% to 59% Fe (making its processing feasible). Furthermore, as the temperature increased, the leaching of Zn was privileged, reaching up to 74% dissolution at 85°C. In the case of Na2O, P, and K2O dissolution, an increase in working temperature accelerated the dissolution kinetics. However, in the case of Fe, an increase in working temperature led to a decrease in its concentration. Lastly, thermodynamic analysis determined the ∆G° values of the reactions, indicating their spontaneity, i.e., they occur without the need of applied energy. In conclusion, it was possible to compare the effect of leaching systems at each stage of processing. At room temperature, leaching of the untreated dust achieved up to 65% Zn dissolution with 38.8% Fe, and after 2 rounds of magnetic cleaning, a dissolution of 65% Zn with a 61.4% Fe content is attained. By increasing the temperature, most of the reactions involved in the leaching process are catalyzed, especially the zinc dissolution (up to 74%). The feasibility of the involved reactions can be supported through thermodynamics.
publisher Universidad Autónoma de Baja California
publishDate 2024
url https://recit.uabc.mx/index.php/revista/article/view/277
_version_ 1808123085781467136
spelling recit-article-2772024-07-11T04:51:26Z Processing of blast furnace collector dusts for their utilization in the steel industry Procesamiento de polvos de colector de alto horno para su aprovechamiento en la industria siderúrgica Acuña Gutiérrez, Iván Omar Puente Siller, Damaris Margarita González de la Cruz, José Manuel Álvarez García, Luis Enrique López Corpus, Juan Antonio Perea Garduño, Alberto Blast furnace Collector dusts Leaching Magnetic separation Powder processing Alto horno Polvo de colector Lixiviación Separación magnética Procesamiento de polvos The production of pig iron involves the generation of by-products such as collector dusts, which are attractive due to their Fe content. However, they cannot be directly reused because of their high content of Zn and alkalis. Therefore, this research aims to explore their utilization through acid leaching. To achieve this, a sample was processed through grinding (1h) and low-intensity magnetic separation, and then the effect of hydrochloric acid as a leaching agent was evaluated at each stage of the process (0.10, 0.25, 0.50 and 1.0M HCl). Furthermore, the effect of temperature was analyzed for the system with 1M HCl. The results indicate that working with systems with high HCl concentration in both fresh and ground material made it possible to dissolve up to 65% Zn content in the initial sample (with 38.8% Fe). On the other hand, leaching the magnetically treated dusts achieved Zn solutions of 56% and 65% for 1 and 2 cleaning cycles, respectively. Regarding the Fe content, an increase was observed compared to the initial content, reaching from 53.8% to 59% Fe (making its processing feasible). Furthermore, as the temperature increased, the leaching of Zn was privileged, reaching up to 74% dissolution at 85°C. In the case of Na2O, P, and K2O dissolution, an increase in working temperature accelerated the dissolution kinetics. However, in the case of Fe, an increase in working temperature led to a decrease in its concentration. Lastly, thermodynamic analysis determined the ∆G° values of the reactions, indicating their spontaneity, i.e., they occur without the need of applied energy. In conclusion, it was possible to compare the effect of leaching systems at each stage of processing. At room temperature, leaching of the untreated dust achieved up to 65% Zn dissolution with 38.8% Fe, and after 2 rounds of magnetic cleaning, a dissolution of 65% Zn with a 61.4% Fe content is attained. By increasing the temperature, most of the reactions involved in the leaching process are catalyzed, especially the zinc dissolution (up to 74%). The feasibility of the involved reactions can be supported through thermodynamics. La producción de arrabio implica la generación de subproductos como los polvos de colector, que son atractivos debido a su contenido de Fe, sin embargo, no pueden reutilizarse directamente debido a su alto contenido de Zn y álcalis. Por ello, esta investigación, busca su aprovechamiento, mediante lixiviación ácida. Para esto, una muestra fue procesada mediante molienda (1h) y separación magnética de baja intensidad y luego se evaluó el efecto del ácido clorhídrico como agente lixiviante en cada etapa del proceso (0.10, 0.25, 0.50 y 1.0M HCl). Además, se analizó el efecto de la temperatura para el sistema con 1M HCl. Los resultados indican que al trabajar en los sistemas con alta concentración de HCl tanto en el material fresco como el molido, fue posible disolver el contenido de Zn hasta un 65%. Por otro lado, al lixiviar los polvos tratados por separación magnética, se alcanzaron disoluciones de Zn de 56 y 65% para 1 y 2 limpias respectivamente. En cuanto al contenido de Fe, se tuvo un incremento respecto al contenido inicial, pasando de 53.8 a 59% Fe, (lo cual, hace factible su procesamiento). Por otra parte, a medida que aumentó la temperatura, se favoreció la lixiviación de Zn, a 85°C, se alcanzó hasta un 74% de disolución. En el caso de la disolución de Na2O, P y K2O el incremento en la temperatura de trabajo acelera la cinética de disolución, no obstante, en el caso de Fe, el incremento en  la temperatura de trabajo, provoca una disminución en su concentración. Por último, en el análisis termodinámico se determinaron los valores de ∆G° de las reacciones, indicando que son espontáneas, es decir, que se llevan a cabo sin la necesidad de una energía aplicada. En conclusión, fue posible comparar el efecto de los sistemas de lixiviación en cada etapa del procesamiento. A temperatura ambiente, la lixiviación del polvo sin procesar alcanza hasta 65% de disolución de Zn con 38.8% Fe; y luego de 2 limpias magnéticas, se alcanza una disolución de 65% Zn con contenido de 61.4% Fe. Al incrementar la temperatura, se cataliza la mayoría de las reacciones involucradas en el proceso de lixiviación, especialmente la de disolución de zinc (hasta 74%) y mediante el uso de la termodinámica se puede sustentar la factibilidad de las reacciones involucradas. Universidad Autónoma de Baja California 2024-07-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html application/zip https://recit.uabc.mx/index.php/revista/article/view/277 10.37636/recit.v7n3e277 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 7 No. 3 (2024): July-September; e277 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 7 Núm. 3 (2024): Julio-Septiembre; e277 2594-1925 spa https://recit.uabc.mx/index.php/revista/article/view/277/573 https://recit.uabc.mx/index.php/revista/article/view/277/574 https://recit.uabc.mx/index.php/revista/article/view/277/575 Copyright (c) 2024 Iván Omar Acuña Gutiérrez, Damaris Margarita Puente Siller, José Manuel González de la Cruz, Luis Enrique Álvarez García, Juan Antonio López Corpus, Alberto Perea Garduño https://creativecommons.org/licenses/by/4.0

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