HIsmelt熔融还原炼铁技术考察与分析

结合对HIsmelt示范工厂的实地考察,重点对HIsmelt示范工厂的工艺流程、设备状态和生产调试情况进行了阐述,认为HIsmelt工艺是钢铁冶金行业中各种成熟技术的新组合,和当前的耐火材料技术、喷吹技术、煤气热回收和净化技术以及其他的冶金技术的发展是相辅相成的,是有实用价值的新炼铁技术.     

废旧锂离子电池还原熔炼“条件窗口”的预测与验证

采用热力学模拟计算软件Factsage,对废旧铝壳锂离子电池FeO-Si O_2-Al_2O_3渣型还原熔炼的氧分压、熔炼温度、造渣剂用量等条件窗口进行了理论预测计算,然后进行了试验验证.试验结果与理论预测值吻合很好.合理的条件窗口为:温度1 450℃,炉渣组成m(Fe O)/m(Si O_2)=0.58~1.03、Al_2O_3质量分数为17%~21.5%,最佳条件下,Co、Ni、Cu回收率分别为98.82%、98.39%、93.56%.     

粉煤直接熔融还原高磷铁矿的非等温分布动力学

针对单一计算几个活化能无法准确揭示还原过程全貌的问题,采用非等温热分析方法对粉煤直接熔融还原高磷铁矿的过程规律进行了研究,利用多重扫描法结合Starink方法对还原过程的动力学参数(表观活化能,频率因子)进行了改进计算,提出一种表观活化能的分布函数及频率因子的分布动力学模型及方法;该模型分别从活化分子和碰撞理论角度有效地揭示出高磷铁矿直接熔融还原过程的能量转化机理及阶段特征,为云南省高磷铁矿的进一步开发提供参考以及其他矿产资源的开发在理论研究上提供方法借鉴。     

Technical analysis on ironmaking process of rotary kiln pre- reduction and smelting by coal and oxygen

The traditional blast furnace ironmaking process has many problems such as long process flow, high dependence on coke and large environmental pollution. In order to solve these problems, the new ironmaking process of rotary kiln pre- reduction and smelting by coal and oxygen was developed. This new process has advantages of wide raw material adaptability, no coke consumption, less pollutant emissions and suitable for special iron ore resources. The mathematical model of the new process was established. Numerical simulation results show that the metallization rate of pre- reduction iron, smelting furnace gas oxidation degree and blast air oxygen content have great influence on coal and oxygen consumption. The coal and oxygen consumption reduces with the increase of pre- reduction iron metallization rate, the rise of oxygen degree of coal gas or the decrease of oxygen content of blast air. This process has a significant advantage in smelting special iron ore resources, which can make up the shortage of blast furnace ironmaking. It is also of great significance to reduce fuel consumption and CO2 emissions.