Secagem speed em amostras de bauxita: comparativo entre diferentes métodos de secagem em incrementos de controle de processo

Abstract

This work aims to study the behavior of bauxite washed increments in the ore beneficiation plant of Alcoa Juruti, when dried in different heating equipment, such as hot plate, traditional oven and microwave oven. By drying the ore in different methods, we hope to have a good comparison of the results to infer which method is statistically more similar to the standard method, according to NBR 15858 (07/2010), for preparing and drying aluminum ore samples. The increments for the tests were collected in the sampling tower contained after the Juruti mine washing plant. This tower was installed in order to evaluate the importance of ore stock contents, such as Al2O3 (aluminum oxide), reactive SiO2 (silicon dioxide), reactive Fe2O3 (iron oxide), e H2O (water), important information for blending the material that will be sold later. The sampling is done through a main linear sampler that diverts a portion of the ore to the tower, cutting the flow of ore at the end of the conveyor belt and then directs the other conveyor belt to the other samplers in the flow, resulting in an increment that will be collected and studied.