采用光学显微镜及IPP软件对高碱度烧结矿显微结构及矿物组成进行了研究,并检测和分析了高碱度烧结矿的冶金性能.研究结果表明:高碱度烧结矿主要由赤铁矿、磁铁矿、铁酸钙、硅酸二钙等矿物组成,不同碱度条件的烧结矿显微结构基本相似,主要为交织熔蚀结构;当碱度从1.5提高到2.0时,烧结矿中的赤铁矿质量分数增加了8 %,磁铁矿质量分数降低了18 %,铁酸钙质量分数增加了23 %,磁铁矿与铁酸钙形成熔蚀结构;烧结矿的成品率从75.09 %增加到82.78 %之后稍有降低,转鼓指数从54 %增加到69.33 %,低温还原粉化性能和还原性均得到较大改善.
The microscopic structure and mineral composition of the high basicity sinter were studied by optical microscope and IPP software, and the metallurgical properties of the sinter were detected and analyzed.The results showed that the sinter was mainly composed of hematite, magnetite, calcium ferrite and dicalcium silicate.The microscopic structure of the sinter with different basicity was generally similar, which was interlaced melt structure.When the basicity of the sinter increased from 1.5 to 2.0, the hematite content increased by 8 %, the magnetite content decreased by 18 %, and the content of calcium ferrite increased by 23 %.The magnetite and the calcium ferrite formed molten structure.The yield of the sinter increased from 75.09 % to 82.78 %, and then dropped slightly.The tumbler index increased from 54 % to 69.33 %.Both low-temperature reduction disintegration and the reducibility were greatly improved.
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