Estudo da resolução do problema da divergência entre os resultados analíticos obtidos na produção e no laboratório em relação aos chamotes

Abstract

Refractory materials are used in several industrial sectors due to the fact that they withstand extreme conditions. The glass, steel and cement sectors, for example, focus on the use of refractories due to the high temperatures involved in the process. Therefore, refractories are used to cover equipment such as boilers, ovens, torpedo cars, etc. Currently, there is a great concern with the quality of this type of material, where the materials most need to have a longer durability, bringing savings to industrialists. With this, there are several analyzes of various properties in different parts of the refractory production process, guaranteeing a quality product for the customer. This work focuses on solving an analytical problem in relation to the determination of density, porosity and water absorption of the refractory industry. Where there is a difference in the results determined in the company's production and laboratory. A bibliographic review on refractory materials was carried out, with its definition, classification, properties and process flow chart. In addition, the calcination process was detailed and so was your product, the chamotte. In the methodology, the stages of sample preparation, test preparation and test execution were studied, observing the factors that suffered divergence between the different sectors of the company. Therefore, a comparison was made between the analytical results of apparent density, apparent porosity and water absorption in relation to the variables studied. Thus, the impact of each one on the divergence of results was quantified. Then, based on the observation of the results, the standardization of the analytical procedure was made for the different sectors of the company, detailing the stages of the process that most influenced the divergence. Finally, the new standard of the created procedure was validated, approximating the value of the analytical results and decreasing the divergence by 80%. Employees were trained to apply the new procedure correctly