Details

Autor(en) / Beteiligte

• Bello-Teodoro, S.
• Pérez-Garibay, R.

Titel

Empirical Model to Estimate Mn 2+ Precipitation Rate from a Leaching Solution Using SO 2 /O 2 as Oxidizing Agent

Ist Teil von

• MRS proceedings, 2012, Vol.1380, Article imrc2011-1380-s21-full017

Erscheinungsjahr

2012

Beschreibungen/Notizen

• ABSTRACT A method, based in leaching with SO 2 , to process low grade pyrolusite minerals has shown good results at laboratory scale. After the separation of the solid impurities, the dissolved manganese is subsequently precipitated using the SO 2 /O 2 gas mixture as oxidising agent. In this research it was obtained a mathematical model to estimate the oxidative precipitation process, as a function of temperature, pH and SO 2 gas flow rate. It was found that pH and temperature have the main influence in the reaction rate. An optimal SO 2 concentration in the mixture must be used to avoid generation of reductive conditions. It was observed a most efficient reaction with a low gas flow rate injection. The predicted reaction rates presents a good concordance with the experimental results (R 2 =0.97), showing a worthy potential for practical uses.