Leaching kinetics of ulexite ore in aqueous medium at different CO 2 partial pressures
AUTOR(ES)
Elçiçek, Hüseyin, Kocakerim, Mehmet M.
FONTE
Braz. J. Chem. Eng.
DATA DE PUBLICAÇÃO
2018-01
RESUMO
Abstract This manuscript presents a study regarding the leaching kinetics of ulexite (Na2O.2CaO.5B2O3.16H2O) under different CO2 partial pressures in aqueous media. The effects of the reaction temperature, particle size, CO2 partial pressure, solid-liquid ratio, and agitation speed were investigated in the boron extraction from the ore. As a result of the experimental studies, it was found that the leaching rate increased with the rise in the reaction temperature and CO2 partial pressure, and decreased with the increase in the particle size and solid-liquid ratio. The reaction temperature was found to be a significant parameter affecting the leaching rate, which varied from 13% to 97% between 303 and 393 K. Agitation speed appears to have no significant effect on the leaching rate. By using several empirical kinetic models to correlate the experimental data, it was found that the leaching rate fits to the Avrami Model. The activation energy of the process is found to be 21.1 kJ.mol-1.
Documentos Relacionados
- Dissolution kinetics of ulexite prepared under different calcination temperatures
- Dissolution kinetics of nickel laterite ore using different secondary metabolic acids
- LEACHING OF COARSE CALICHE ORE. EXPERIMENT AND MODELLING
- Effects of Partial O2 Pressure, Partial CO2 Pressure, and Agitation on Growth Kinetics of Azospirillum lipoferum under Fermentor Conditions
- A Dual-mode model interpretation of CO2/CH4 permeability in polysulfone membranes at low pressures