出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：Acidification of phosphate rock as one of the mainstages of the production process of phosphate fertilizers. Sulfuric acid is used to obtain phosphoric acid, one of the intermediate products of the fertilizer industry. This stage of process is already widely used for production of several types of fertilizers, among them Simple Super Phosphate (SSP), generating the liquid effluent hexafluorsilicic acid (H2SiF6) as a by-product from secondary reactions in the process. In this works, we simulate a mathematical model to represent dynamic behavior of filtration and consolidation in pressure filter, equipment used to recover H2SiF6 in production of SSP, in order that it can be used in process itself, helping in the efficiency of acidulation stage of phosphate rock, reducing production costs and promoting a more sustainable process. This study predicts a recovery of 92,07% of H2SiF6 fed and retention of 73,38% of solids.
