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

被引：1
|
作者：
Munoz-Arroyo, R. [1 ]
Escobedo-Bocardo, J. C. [1 ]
Hernandez-Garcia, H. M. [1 ]
Cortes-Hernandez, D. A. [1 ]
Terrones-Maldonado, M. [2 ]
Rodriguez-Pulido, A. [2 ]
Hernandez-Pinero, J. L. [3 ]
机构：
[1] IPN, Ctr Invest & Estudios Avanzados, Unidad Saltillo, Mexico City, DF, Mexico
[2] Inst Potosino Invest Ciencia & Tecnol, San Luis Potosi, Mexico
[3] Univ Autonoma Nuevo Leon, Nuevo Leon, Mexico
来源：
REVISTA DE METALURGIA | 2010年 / 46卷 / 04期
关键词：
Zeolite; Silica; Aluminum; Magnesium; Minerals; MOLTEN ALUMINUM-ALLOYS;
D O I：
10.3989/revmetalm.0949
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In order to eliminate magnesium from an A 380 Al-Si alloy at 750 degrees 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.
引用
收藏
页码：351 / 359
页数：9
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