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针对钒钛磁铁矿转底炉直接还原过程中炉底上涨的原因进行了分析研究,并在实验室开展了相关试验。通过分析黏结物化学组成和物相组成,得出转底炉炉底上涨为玻璃质液相黏结高熔点橄榄石和铁氧化物累积导致炉底上涨;通过实验室试验研究表明,物料粒度是影响转底炉炉底上涨的关键因素,其次是还原温度和还原时间。根据上述研究结果,结合资源综合利用中试线现场条件,优化了原料转底炉系统的工艺参数,改进了干球技术指标,转底炉炉底上涨基本得到抑制,实现了试验生产顺行。
In view of the reason of furnace bottom rising in the process of direct reduction of vanadium-titanium magnetite rotary hearth furnace, the related experiments were carried out in the laboratory. By analyzing the chemical composition and phase composition of the binder, it can be concluded that the furnace bottom of the rotary hearth furnace is caused by the accumulation of high melting point olivine and iron oxide in the glassy liquid phase resulting in the rise of the furnace bottom. The laboratory tests show that the particle size Bottom furnace bottom furnace up the key factors, followed by the reduction temperature and reduction time. According to the above research results, the process parameters of the raw material rotary hearth furnace system are optimized and the technical indicators of the dry-bulb ball are optimized according to the field conditions of the pilot test line for comprehensive utilization of resources. The basic rise of the rotary hearth furnace is basically suppressed and the test production goes smoothly.