Obtención, a partir de materias primas cubanas y por reducción aluminotérmica, de un ferromanganeso de bajo contenido de carbono y con más del 65% de manganeso
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Fecha
2004-06-25
Autores
Hernández Ortega, Taymara
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Editor
Universidad Central "Marta Abreu" de las Villas
Resumen
Se efectuó un estudio de la influencia de la cascarilla de laminación, aluminio
y caliza sobre el contenido de manganeso en ferromanganesos de bajo contenido
de carbono, obtenidos por reducción aluminotérmica a partir de materias primas
cubanas. Para esto se realizó un diseño experimental factorial 2k aplicado a
mezclas utilizando relaciones, el cual se analizó estadísticamente. Además se
determinó el rendimiento de las síntesis y los porcientos de recuperación del
manganeso en las aleaciones.
Se caracterizaron químicamente tanto las ferroaleaciones como las escorias
empleando fluorescencia de rayos X y espectrometría de absorción molecular y, a
partir de las composiciones de estos materiales, se hizo un balance de masas y se
compararon los resultados teóricos con los experimentales.
El porciento promedio de manganeso en las aleaciones obtenidas fue de
57.05, alcanzándose como valor máximo 67.21 (contenido promedio). El
rendimiento de la síntesis y la recuperación del manganeso promedios fueron
70.1 % y 50.3 % respectivamente.
Del análisis del diseño experimental se determinó que solo la caliza y la
interacción aluminio:cascarilla influyen positivamente sobre el porciento de
manganeso en la aleación y que las interacciones aluminio:caliza y
aluminio:cascarilla:caliza no son estadísticamente significativas.
Se obtuvieron ferromanganesos sustituyendo la caliza utilizada como
fundente por escoria y se compararon los porcientos de manganeso en las
aleaciones, los rendimientos de las síntesis y las recuperaciones de manganeso.
A partir de los resultados alcanzados se concluye que es factible la obtención
de un ferromanganeso con un contenido de manganeso superior al 65 % en masa,
utilizando materias primas cubanas y empleando la reducción aluminotérmica
como método de síntesis.
An study of the influence of the lamination husk, aluminum and limestone in the quantity of manganese in low content of carbon ferromanganese, obtained by aluminothermy reduction starting from Cuban by-products was made. For this a 2k Factorial experimental design applied to mixtures using relations was made, which was analyzed statistically. It was also determined the yield of the synthesis and the recovery percent of manganese in the alloys. The ferroalloys and scum were chemically characterized using X- Rays fluorescence and molecular absorption spectrometry, starting from the composition of this materials were made a mass balance, and the theoretical results were compared with the experimental ones. The mean percent of manganese in the obtained alloys was 57.05, reaching as maximum value 67.21 (mean content). The yields of the synthesis of the manganese average were 70.1% and 50.3% respectively. From the analysis of the experimental design it was determinate that only the limestone and the interactions aluminum:husk influence positively on the manganese percent in the alloy and that the interaction aluminum:limestone and aluminum: husk :limestone are not statiscally significant. Ferromanganeses were obtained substituting the limestone uses as flux by scum and were compared the manganese percent in the alloy, the yields of the synthesis and the recoveries of manganese. From the reached results, one concludes that the obtaining of ferromanganese with a manganese content superior to 65% in mass is feasible, from Cuban raw materials and using the aluminothermic reduction as synthesis method.
An study of the influence of the lamination husk, aluminum and limestone in the quantity of manganese in low content of carbon ferromanganese, obtained by aluminothermy reduction starting from Cuban by-products was made. For this a 2k Factorial experimental design applied to mixtures using relations was made, which was analyzed statistically. It was also determined the yield of the synthesis and the recovery percent of manganese in the alloys. The ferroalloys and scum were chemically characterized using X- Rays fluorescence and molecular absorption spectrometry, starting from the composition of this materials were made a mass balance, and the theoretical results were compared with the experimental ones. The mean percent of manganese in the obtained alloys was 57.05, reaching as maximum value 67.21 (mean content). The yields of the synthesis of the manganese average were 70.1% and 50.3% respectively. From the analysis of the experimental design it was determinate that only the limestone and the interactions aluminum:husk influence positively on the manganese percent in the alloy and that the interaction aluminum:limestone and aluminum: husk :limestone are not statiscally significant. Ferromanganeses were obtained substituting the limestone uses as flux by scum and were compared the manganese percent in the alloy, the yields of the synthesis and the recoveries of manganese. From the reached results, one concludes that the obtaining of ferromanganese with a manganese content superior to 65% in mass is feasible, from Cuban raw materials and using the aluminothermic reduction as synthesis method.
Descripción
Palabras clave
Diseño Experimental Factorial, Manganeso, Balance de Masas, Obtención de Ferromanganeso, Obtaining of Ferromanganese, Factorial Experimental Design