论文部分内容阅读
本文回顾了世界铁矿石生产和准备的历史沿革，阐述了铁矿石选矿的技术状况，破碎和各种选矿工艺、弱磁选和重选的成功、磁化焙烧的失败及强磁选和浮选的进展。分析了铁矿石选矿的经济问题：由于以巴西和澳大利亚为代表的大型高品位铁矿床的开采而导致的大型选厂，特别是50年代到80年代间美国和苏联的大型选厂的发展。预测了未来的发展趋势：越来越复杂的循环和废钢准备方法的日益增长的重要性以及对用于直接还原的高品位矿石或选矿处理的日益增长的需要。
This paper reviews the history of iron ore production and preparation in the world, expounds the technical conditions of iron ore beneficiation, fragmentation and various beneficiation processes, the success of weak magnetic separation and re-selection, the failure of magnetization roasting and strong magnetic separation and floating The progress of the election. The economic problems of iron ore beneficiation are analyzed: the development of large-scale power plants due to the exploitation of large-scale high-grade iron ore deposits represented by Brazil and Australia, especially the large-scale ore dressing plants in the United States and the Soviet Union from the 1950s to the 1980s . Predicting future trends: the ever-increasing importance of increasingly complex recycling and scrap preparation methods and the growing need for high-grade ores or beneficiation for direct reduction.