Determination of mass transfer between gas and liquid in atmospheric leaching of sulphidic zinc concentrates

摘要: Abstract In atmospheric direct leaching of sulphidic zinc concentrates, oxygen acts as an oxidant in the dissolution. The amount solution has important effect on kinetics whole process. this paper, four laboratory scale equipment are used for studying gas mass transfer With each experimental set-up it is possible to analyse some factors affecting kLa, kL and a coefficients. flow rate mixing intensity increased kLa expected. Also value was with intensity, but increasing salt concentration had opposite effect. Lowering surface tension density liquid decreased bubble Sauter mean diameter therefore total gas–liquid interfacial area increased. Oxygen consumption into slightly temperature. On other hand pressure notable. By combining results different enables us study function parameters such as: temperature, pressure, properties conditions. Knowing coefficients essential process development design.