Diseño del Proceso de Elaboración de un Producto para Acabado de Paredes a Partir del Hidróxido de Calcio Resultante de la Combustión de la Piedra Caliza

Abstract

The design of a process required in the elaboration of a product for wall finishing from calcium hydroxide resulting from the combustion of limestone for the Corporation of lime producers "Los Nevados", an association of 20 producers located in the parishes of Calpi, Licán and San Juan in the Province of Chimborazo. In the characterization of the raw material used for the design of the product, a comparative analysis of raw materials was carried out through physical and chemical analysis. The percentage of hydrated lime was determined to improve the performance of the design and the final product was characterized based on INEN 247: hydrated lime, INEN 248: quicklime, INEN 2536: aggregates for mortars and INEN 2589: physical analysis, with the use of materials such as the X-ray spectrometer, ball mill, sieves, Vicat equipment and Le Chatelier's flask. The research used sampling methods of the INEN 251 standard for limes, carried out in the quality control laboratory of the company Cemento Chimborazo. In the design of the product, a yield of 1.875 Kg/m2 was obtained, a normal consistency of 38% and a difference in grain size between the two products of 6.17%. The density obtained was 2.42 g/cm3, showing similarity with the commercially distributed product. It is concluded that with the implementation of the proposal a production yield of 12% of quicklime and 18% of hydrated lime will be achieved, the limestone that enters the kiln is very heterogeneous, the most appropriate percentage of hydrated lime for the design should be 80% and 20% sand. It is recommended to install a crusher, a weighing system, adequate hydration of the quicklime and improve the residence time of the limestone in the kiln.