CARACTERIZACIóN FíSICOQUíMICA DE ACRECIONES PRESENTES EN UN HORNO DE LECHO FLUIDIZADO PARA LA TOSTACIóN DE BLENDA.

摘要

This study has oF central aim to establish the physicochemical characteristics oF the accretions present in an industrial Furnace oF sphalerite roasting (ZnS) operating at 945 ° C which, according to observations on plant, they are Formed preFerentially on surFaces at low temperature such as boiler output, cooling pipes and hoppers. The analysis by X-Ray DiFFraction, Atomic Absorption, and Image Analysis showed that the main components oF these deposits are zinc sulFate, lead sulFate and zinc Ferrite. A thermodynamic analysis based on the construction oF stability diagrams For the system Zn-±e-Pb/SO 2 (g)-O 2 (g) with X Zn ≥ 0,5 (this is, X Fe = 0,125 X Pb = 0,015) between 300 to 900 º C, confrms the strong presence oF ZnSO 4 , Fe 2 (SO 4 ) 3 , PbSO 4 and ZnFe 2 O 4 under reactor operating conditions oF roasting, validating this analysis with experimental observations.