Limas abrasivas obtenidas a partir de escorias aluminotérmicas y cemento P-350
Fecha
2009-06-20
Autores
Leal Jimenez, Alejandro
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Editor
Universidad Central "Marta Abreu" de Las Villas
Resumen
El trabajo muestra los pasos para la obtención de limas abrasivas de mano destinadas al afilado de machetes y otros instrumentos de trabajo agrícola. Las limas se obtienen a partir del uso, como material abrasivo, de residuos (escorias) del proceso aluminotérmico, desarrollado para la obtención de ferrocromo, empleando la pirolusita como materia prima. La escoria está compuesta por un 60 % de corindón u óxido de aluminio (Al2O3) y 35 % de galaxita o aluminato de manganeso (MnAl2O4), siendo caracterizada por estudios anteriores. La concepción de la lima radica en la aglutinación del abrasivo con una mezcla de cemento ordinario de construcción (Pórtland P-350) y agua. Se desarrolla en la investigación un estudio de las relaciones de agua, abrasivo y cemento, estudiándose la mejor combinación de la mezcla, considerando también, como variable independiente, el tiempo de curado en agua. Se exponen los moldes construidos para la fabricación de las limas, así como la metódica para la obtención de sus prototipos experimentales. En el trabajo se incluye una descripción de los tipos de abrasivos más empleados en la construcción de limas cerámicas
y los ensayos fundamentales a las que están sometidas.
In the present work the steps for the obtaining of abrasive handing files for the knife and other instruments sharp of agricultural work are shows. The files are obtained starting from the use, as abrasive material, of residuals (slag) of the aluminutermic process, developed for the ferrocromo obtaining, using the pirolusite like matter prevails. The scum is composed by 60 % corindon or aluminum oxide (Al2O3) and 35 % galaxite or manganese aluminate (MnAl2O4), being characterized by previous studies. The conception of the file resides in the agglutination of the abrasive with a mixture of ordinary cement of construction P-350 and it dilutes. It is developed in the investigation a study of the relationships of water, abrasive and cement, being studied the best combination in the mixture, considering the time of having cured in water. The molds are described used for the construction of the files, as well as the methodical one for the obtaining of the prototypes of experimental files. In the work a description of the types is included of abrasive more employees in the construction of ceramic files and the fundamental rehearsals to those that are subjected.
In the present work the steps for the obtaining of abrasive handing files for the knife and other instruments sharp of agricultural work are shows. The files are obtained starting from the use, as abrasive material, of residuals (slag) of the aluminutermic process, developed for the ferrocromo obtaining, using the pirolusite like matter prevails. The scum is composed by 60 % corindon or aluminum oxide (Al2O3) and 35 % galaxite or manganese aluminate (MnAl2O4), being characterized by previous studies. The conception of the file resides in the agglutination of the abrasive with a mixture of ordinary cement of construction P-350 and it dilutes. It is developed in the investigation a study of the relationships of water, abrasive and cement, being studied the best combination in the mixture, considering the time of having cured in water. The molds are described used for the construction of the files, as well as the methodical one for the obtaining of the prototypes of experimental files. In the work a description of the types is included of abrasive more employees in the construction of ceramic files and the fundamental rehearsals to those that are subjected.
Descripción
Palabras clave
Limas Cerámicas, Abrasivos, Cemento, Abrasividad, Ceramic File, Abrasive, Cement, Abrasion