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handle: 10261/86582
[ES]: En el presente trabajo se estudia la influencia ejercida por la molienda en la textura, estructura y en el mecanismo de descomposición térmica de la dolomita, empleándose las técnicas de A.T.G., A.T.D., difracción de rayos X y medidas de superficie específica. No se ha observado que la molienda cause la descomposición de la dolomita a temperatura ambiente. Los resultados obtenidos muestran que el mecanismo de la descomposición térmica de la dolomita, en vacío, se desplaza de la reacción: (CO3)2 MgCa OCa + OMg + 2CO2 (CO3)2 MgCa CO3Ca + OMg + CO2 a medida que progresa la molienda de la sal. Estos resultados se han interpretado en función de la deformación plástica sufrida por el sólido como consecuencia del tratamiento mecánico.
[EN]: Effects of mechanical grinding on the texture, structure and thermal decomposition mechanism of dolomite have been studied. T.G. A., D.T.A., X-ray diffraction and B.E.T. specific surface area techniques have been used. Decomposition of dolomite was not observed during its grinding at room temperature. The results obtained show that the thermal decomposition mechanism of dolomite in vacuum, changes from: (CO3),MgCa > OCa + OMg + 2 CO, to: (CO3).MgCa > CO3Ca + OMg + CO2 when grinding progress. These results could be explained on the basis of the plastic deformation of the solid cuased by mechanical grinding.
5 páginas, 4 figuras, 11 referencias.
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