High Temperature Crystallization Kinetics of MgSO4 • H2O

被引：0

作者：

Wanderley, Kristine Bruce ^{[1
]}

Romano Espinosa, Denise Crocce ^{[1
]}

Soares Tenorio, Jorge Alberto ^{[1
]}

机构：

[1] Univ Sao Paulo, Polytech Sch, Chem Engn Dept, Rua Do Lago 250,2nd Floor, BR-05508080 Sao Paulo, SP, Brazil

来源：

ENERGY TECHNOLOGY 2018: CARBON DIOXIDE MANAGEMENT AND OTHER TECHNOLOGIES | 2018年

关键词：

Monohydrate; Leachate liquor; Avrami model; SOLVENT-EXTRACTION; SULFATE-SOLUTIONS; MAGNESIUM; CRYSTALS; NICKEL; COBALT;

D O I：

10.1007/978-3-319-72362-4_36

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Magnesium is present in nickels leach liquor and it is often disposed in waste barriers. However, new technologies with the aim of recuperating magnesium and other metals in the liquor have proven that it is possible to reduce the amount of metal lost during nickel ore processing. In this context, high temperature crystallization removes magnesium, with a concentration of 8 g/L, as MgSO4 center dot H2O from the leach liquor. Kinetic studies of this process are needed to evaluate the thermodynamics of the growth of crystals. Thus, this work aims to study the crystallization kinetics of MgSO4 center dot H2O. Temperatures of 230, 210 and 200 degrees C were investigated in a batch crystallization system in solutions with pH(2). Aliquots were taken at each hour up to 5 h of time residence and analysed by ion chromatography for magnesium concentration. The reaction mechanism as well as rate constant and activation energy for each reaction temperature were obtained.

引用

页码：405 / 413

页数：9

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