Estudio del mecanismo de eliminación de magnesio de aleaciones Al-Si en estado líquido mediante inyección de minerales base sílice

Translated title of the contribution: Study of the removal mechanism of magnesium from Al-Si liquid alloys using silica base minerals injection

R. Muñoz-Arroyo, J. C. Escobedo-Bocardo, H. M. Hernández-García, D. A. Cortés-Hernández, M. Terrones-Maldonado, A. Rodríguez-Pulido, J. L. Hernández-Piñero

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In order to eliminate magnesium from an A 380 Al-Si alloy at 750° C, the submerged powder injection method, using an inert carrier gas (Ar), was applied. The injected powders in the liquid aluminum bath were zeolite, silica and mixtures of zeolite-silica minerals. For each experiment the response variables were: eliminated magnesium versus injection time and quantity of drosses produced. Chemical analysis by atomic absorption spectrometry showed that mixtures of silica-zeolite 66:34 wt% have the best results with regarding to the removal magnesium from 1 to 0.0066 wt%. During the elimination of magnesium complex stoichiometry compounds were formed due to the reactions among zeolite, water steam and liquid aluminum. These compounds were analyzed by XRD, SEM and TEM. The results obtained, along with using the FactSage 6 thermodynamic software, allowed to elucidate the reaction mechanism between the minerals used and liquid aluminum.

Translated title of the contributionStudy of the removal mechanism of magnesium from Al-Si liquid alloys using silica base minerals injection
Original languageSpanish
Pages (from-to)351-359
Number of pages9
JournalRevista de Metalurgia (Madrid)
Volume46
Issue number4
DOIs
StatePublished - Jul 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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