Evaluation of density as a parameter to act in the quality control of the coating solution (anti-sticking) applied to iron ore pellets
Samuel Sena de Oliveira; Lorrane Estéfany Alves Rodrigues; Ana Maria Guilherme Baillon; Arthur Trindade Klein; Douglas Soares Batista; Oliver da Ross Rezende; Raphael Scardua dos Santos
Abstract
Iron ore pellets used in direct reduction reactors must receive the application of a solution on their surface to avoid sticking during the production process in the steel plants. There are several studies regarding the types of solute, its characteristics and the specific target consumption to obtain the optimal mixture for application in the pellets. Through the specific “standardized” consumption, sets points of the industrial plants defined to allow the proper addition of the solute to the solvent occurs. An important process variable should be checked is density. However, density as control variable is few disseminated in studies in the literature. This article aims to show the results obtained in the industrial tests considering the density as an additional control variable in the preparation of the solution for application of the coating in iron ore pellets.
Keywords
Referências
1. Lopes FS. Study of the sticking phenomenon of Samarco pellets during the direct reduction process [dissertation]. Ouro Preto: Universidade Federal de Ouro Preto; 2004. (In Portuguese).
2. Viotti CLG. Evaluation of potential refractory materials as coating agents [undergraduate thesis]. Belo Horizonte: Centro Federal de Educação Tecnológica de Minas Gerais; 2020. (In Portuguese).
3. Iron ore pellets for shaft direct-reduction feedstocks - Determination of the clustering index, 2015.
4. Simões HO, Bailon AMG, Doellinger TM. Development of a methodology for determining the percentage of coating in fired pellets via automatic image analysis. In: Associação Brasileira de Metalurgia, Materiais e Mineração. 43rd Seminar on Reduction of Iron Ore and Raw Materials/14th Brazilian Symposium on Iron Ore/1st Brazilian Symposium on Agglomeration of Iron Ore; 2013 Sept. 1-4; Belo Horizonte, Brazil. São Paulo: ABM; 2013. p.933-946. (In Portuguese).
5. Collins R, Norrman L. Direct reduction pellets for the 21st century – a case study. Direct from Midrex. 2001;2Q:4-X. p.4.
6. Ribas JF, Broietti FCD, Leal LPV, Passos MM. Saturated, unsaturated and supersaturated solutions and their representations by chemistry undergraduates. Actio: Docência em Ciências. 2017;2(2):61-79. (In Portuguese).
Submetido em:
28/08/2023
Aceito em:
07/11/2023
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