Estudio de la conductividad térmica de residuos sólidos dentro de una matriz de yeso, provenientes del proceso de rebajado del cuero en la empresa Curtiduría Tungurahua S.A.

Abstract

This project identified the thermal conductivity of solid residue from the process of thinning of the cowhide isolated on a gypsum matrix, establishing their behavior as an insulating material. Arose as to the parameters for the preparation of hot plate oven as well as for the measurement of the thermal conductivity. Mould of A36 steel due to its low cost and malleability obtaining a plaster or gypsum known model was manufactured, this material has a neutral pH, mechanical, acoustic properties and is non-flammable. The five centimeters thick, was selected what dimensions both the oven and the specimen being its measures 30 x 30 x 5 cm. From solid residue from the process of thinning, was dried in a time of 13 days exposed to the environment and protected from the Sun, with outcomes of a pH not suffered alterations being the value of the wet sample 3.39 and dry sample 3.38 this tells us that the drying process was correct, that the presence of water does not influence on it. The compacted chips of leather, performed during a time of 15 min, optimal time for fibers of adhere one with others, without having to add binders. Matrices were sealed with the same cast and determined its weight in 8.8 lb. Oven began testing of functionality of the hot plate exposed to the environment, to obtain values of temperature and voltage. He oven is developed low the standard ASTM C177-13, complying with the dimensions of them specimens, included the thickness of them guards insulating of the oven being it measure minimum of 7.5 cm. For the operation of the cold plate feeding is direct with water from the network, the volumetric method to determine the required flow rate, with a flow rate of 1.25 l/min, which will allow to maintain a constant temperature in the cold plate. To determine the thermal conductivity he is needed that it may take a time of 40 min, values obtained were compared with research and books used as reference, throwing an error of 2% in the oven, and the thermal conductivity of the matrix containing gypsum of chip of leather which was obtained is 0.589 W/m℃.