Measurement of reaction enthalpy during pressure oxidation of sulphide minerals

被引：14

作者：

Bylina, I. ^{[1
]}

Trevani, L. ^{[2
]}

Mojumdar, S. C. ^{[1
]}

Tremaine, P. ^{[2
]}

Papangelakis, V. G. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada

[2] Univ Guelph, Dept Chem, Guelph, ON N1G 2W1, Canada

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2009年 / 96卷 / 01期

关键词：

DSC; enthalpy; ICP-AES; mixing cell; oxidation; SEM; sulphide minerals; XRD; NANOCOMPOSITE MATERIALS; THERMAL-DECOMPOSITION; ZINC COATINGS; HEAT-FLOW; CALORIMETRY; HYDRATION; CEMENT; CHALCOPYRITE; PROTECTION; KINETICS;

D O I：

10.1007/s10973-008-9883-4

中图分类号：

O414.1 [热力学];

学科分类号：

070201 [理论物理];

摘要：

A calorimetric method for determining the enthalpy of the aqueous oxidation of sulfide minerals at high temperatures and oxygen pressures has been developed and evaluated under conditions relevant to industrial pressure oxidation operations. This information is important for heat balance calculation and optimization of the pressure reactor design. Experiments were carried out on a differential scanning calorimeter (DSC) with a commercial mixing cell. Enthalpy measured during oxidative dissolution of pyrite (Valdenegrillos, Spain), pentlandite with pyrrhotite (Sudbury, Ontario, Canada) and impure chalcopyrite (Victoria, Australia) minerals at 150A degrees C and partial oxygen pressures of 3.4 and 5.5 MPa have been performed and found to be consistent with theoretical estimations.

引用

页码：117 / 124

页数：8

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