Diseño de un proceso para la obtención de carbonato de calcio precipitado a partir de la cal hidratada en la Empresa INCOREG CIA. LTDA.

Abstract

The aim was to design a process in order to obtain precipitated calcium carbonate from the production of hydrated time in the company INCOREG CIA. LTDA. Limestone is found in large quantity in the storage area, such material is not used for product processing. The study consisted of designing the appropriate process to obtain precipitated calcium carbonate, for this, studies of calcination, hydration, purification, carbonatation and productive leaching samples showed that to convert the CaO into Ca (OH) 2, a hydration time greater than 5 minutes is needed a percentage of 20% solids and agitation speed equal to or greater than 1064 revolutions per minute. The stage of purification in Three – stage Hydrocyciones revealed that it is only possible to eliminate 50% of iron and silica with the optimized values from the analyzed Variables. The results of carbonation studies demonstrate that it is possible to produce precipitated calcium carbonate with purity > 98% particle size d50, 3.4 microns and particle size D90 9.1. To increase the index of whiteness was necessary to eliminate all iron through a feasibility study, in addition it shows that this design is feasible both economically and financially. According to the study it is recommended to take into account the steps specified for the design of the process to obtain calcium carbonate precipitated by the hydrated time with the purpose that the product meets the specific characteristics.