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Process development for the recovery of high-purity magnesia and magnesium salt solutions from Northern Ontario magnesites.

机译：从安大略省北部菱镁矿中回收高纯度氧化镁和镁盐溶液的工艺开发。

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摘要

In the course of this research, two novel solubilization processes were developed to recover concentrated, high purity magnesium salt solutions from Northern Ontario 'iron substituted' magnesites.;In the two solubilization processes developed, namely 'CaCl;In the multi-stage extraction method developed, using the concepts of 'short calcination' and 'hot addition', the reactants were added in a step-wise manner corresponding to their reaction rates. By using the two solubilization processes in multi-stage extraction, 2.97M MgCl;Chemical reaction equilibrium analysis was carried out to predict the magnesium recovery in the two processes based on the thermodynamic data, and to compare with the experimental results.;Mechanisms were proposed for the two solubilization processes developed, based on the experimental data.;The concentrated, high purity magnesium chloride and magnesium sulphate solutions produced by the two processes developed in this study, can be used to produce commercial grades of magnesium chloride, magnesium sulphate and magnesium oxide, or alternatively can be employed in the primary magnesium production processes.
机译：在这项研究过程中，开发了两种新颖的增溶工艺，从安大略省北部的“铁取代”镁矿中回收浓缩的高纯度镁盐溶液。在开发的两种增溶工艺中，即“ CaCl”；在多阶段萃取方法中在使用“短煅烧”和“热添加”的概念进行开发的过程中，反应物以对应于其反应速率的逐步方式添加。通过多步萃取中的两种增溶过程，对2.97M的MgCl进行了化学反应平衡分析，根据热力学数据预测了两种过程中的镁回收率，并与实验结果进行了比较。根据实验数据，开发了两种增溶方法;通过本研究开发的两种方法生产的浓缩高纯度氯化镁和硫酸镁溶液可用于生产商业级氯化镁，硫酸镁和镁氧化物，或可替代地用于初级镁生产工艺中。

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  • 作者

    Nanayakkara-Tantirige, Kanthi Nimalka.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Engineering Chemical.
  • 学位 Ph.D.
  • 年度 1990
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  • 原文格式 PDF
  • 正文语种 eng
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