高比例配加烧结用FMG矿的研究
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摘要
利用基于Microsoft-Excel的铁前优化程序对市场上的矿粉进行了系统的性价比比较,确定了烧结矿中高比例添加FMG矿的方案。采用全自动熔点测定仪、差热-热重分析仪、矿相显微镜等对FMG矿的矿物组成、熔点、同化性能、热重性能等进行了详细地分析,并通过配比试验研究了FMG矿对烧结矿质量及性能的影响。结果认为,FMG矿的熔点较低,仅1 473℃;矿物以褐铁矿为主,结构致密、晶格缺陷少;同化性能好,有利于烧结过程中液相粘结相的生成;吸水性较好,有利于提高烧结混合料的水分含量;烧结料中FMG矿的最高配比可达47%以上。通过对河钢石钢烧结大比例地添加FMG矿,可达到满意的结构优化效果,有利于降低铁前成本。
Systematic cost-performance comparison of ore fines on the market was carried out by using Microsoft-Excel-based pre-iron optimization program, and the scheme of adding FMG ore with high proportion in sinter was determined. The mineral composition, melting point, assimilation and thermo-gravimetric properties of FMG ore were analyzed in detail by means of full automatic melting point analyzer, DTA and mineral phase microscope. The effect of FMG ore on sinter quality and properties was studied by mix experiment. The results show that the melting point of FMG ore is low, only 1 473 ℃; limonite is the main mineral with compact structure and few lattice defects; good assimilation performance is conducive to the formation of liquid phase bonding phase in sintering process; good water absorption is conducive to improving the moisture content of sintering mixture; the maximum proportion of FMG ore in sintering material can reach more than 47%. By adding FMG ore in large proportion to the sintering process of HBIS Shisteel, structural optimization can be achieved, and the cost before ironmaking can be reduced.
Systematic cost-performance comparison of ore fines on the market was carried out by using Microsoft-Excel-based pre-iron optimization program, and the scheme of adding FMG ore with high proportion in sinter was determined. The mineral composition, melting point, assimilation and thermo-gravimetric properties of FMG ore were analyzed in detail by means of full automatic melting point analyzer, DTA and mineral phase microscope. The effect of FMG ore on sinter quality and properties was studied by mix experiment. The results show that the melting point of FMG ore is low, only 1 473 ℃; limonite is the main mineral with compact structure and few lattice defects; good assimilation performance is conducive to the formation of liquid phase bonding phase in sintering process; good water absorption is conducive to improving the moisture content of sintering mixture; the maximum proportion of FMG ore in sintering material can reach more than 47%. By adding FMG ore in large proportion to the sintering process of HBIS Shisteel, structural optimization can be achieved, and the cost before ironmaking can be reduced.
引文
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