鄂西高磷鲕状赤铁矿含碳球团脱磷

Dephosphorization of high-phosphorous oolitic hematite carbon-containing pellets in western Hubei

  • 摘要: 根据鄂西地区高磷鲕状赤铁矿的矿物特性结合煤基直接还原方式的特点进行了脱磷实验研究,实验过程中还原煤为哈密煤.实验结果表明:采用煤基直接还原+磁选工艺在实验室条件下可以获得最低磷质量分数为0.031%的铁精粉;为了达到这一实验结果,必须保证满足还原脱磷条件的最佳还原温度和配碳量(本实验条件下,最佳还原温度为1250℃,矿煤比1.25),生球要有适宜磷还原的二元碱度(R ≤ 0.8),适中的原矿粒度(2 mm以下),最后保证达到反应平衡的还原时间(50 min).

     

    Abstract: Based on the characters of high-phosphorous oolitic hematite,the dephosphorization research was carried out with the method of coal-based direct reduction,and Hami coal was used in this experiment. The results show that it can get the iron fine with the lowest mass fraction of P 0.031% in the lab after the processes of coal-based direct reduction and magnetic separation. To get the results,it should insure the best reduction temperature and the proper amount of adding carbon (in this experiment,the best reduction temperature is 1 250℃,the mass ratio of ore to coal is 1.25). The wet balls require the proper binary basicity(R ≤ 0.8),and the proper ore size (the ore size is below 2 mm),and finally the reduction time is required to last until the balance of the reaction (50 min).

     

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