Investigation of dissolution kinetics of zinc from smithsonite in 5-sulphosalicylic acid solution

Autor:	Dan Dan Wu, Jiushuai Deng, Shuming Wen, J. Yang
Rok vydání:	2014
Předmět:	Smithsonite Chemistry Inorganic chemistry Kinetics Metals and Alloys chemistry.chemical_element Activation energy Zinc engineering.material Industrial and Manufacturing Engineering Sulphosalicylic acid engineering Leaching (metallurgy) Particle size Dissolution
Zdroj:	Canadian Metallurgical Quarterly. 54:51-57
ISSN:	1879-1395 0008-4433
DOI:	10.1179/1879139514y.0000000150
Popis:	The dissolution kinetics of smithsonite was investigated using 5-sulphosalicylic acid solution as leaching agent. The effects of several experimental parameters on the dissolution of smithsonite were investigated and a kinetic model was developed to represent these relationships. The dissolution rate increased with increasing solution temperature, concentration and stirring speed as well as with decreasing particle size. The dissolution was controlled by the shrinking core model for the surface chemical reaction. The activation energy of the dissolution process was determined to be 44·42 kJ mol−1. The rate of the reaction based on shrinking core model can be expressed by a semi-empirical equation as: 1–(1–x)1/3 = [k0(C)0·692(r0)−0·946(SS)1·250exp(–44·42/RT)]t. 5-Sulphosalicylic acid solution can therefore be used as an effective leaching agent for zinc extraction from smithsonite.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::05f3541e675c720a0a285ce8a93056bb https://doi.org/10.1179/1879139514y.0000000150 Zobrazit plný text záznamu