The existing state of Mgo and it effect on the properties of iron ore agglomerates
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摘要: 本文采用光學顯微鏡,電子探針及穆斯堡爾效應等手段對MgO在燒結礦和球團礦中的賦存狀態及其對冶金性能的影響進行了微觀分析研究。
顯微鏡下觀察表明,隨燒結礦中MgO含量增加,赤鐵礦及鐵酸鈣明顯減少。當MgO約達4%以上時,燒結礦渣相中開始出現少量鎂質硅酸鹽礦物。
電子探針掃描分析表明,MgO主要分布于除赤鐵礦之外的鐵相礦物中,在燒結礦中形成含鎂磁鐵礦,在球團礦中形成鎂鐵礦,少部分分布于渣相中。
對杭鋼球團礦所做的穆斯堡爾譜學研究表明,在焙燒過程中,Mg2+大量進入磁鐵礦八面體晶位,揭示了MgO在人造富礦中富集于鐵相及引起物相變化的機理。
基于上述試驗研究,分析了MgO對人造富礦冶金性能的影響。Abstract: By optical microscopic analysis, electron probs micro-analysis and M?ssbauer effect, the existing state of Mgo and its effecf on the properties of sinter and pellet were studied, from optical microscopic observation, it was shown that as the Mgo content in sinter increased, the content of hematite and calciumferrite obviously decreased, when it reached more than 4%, some magnesiosilicate salt minerals in sinter slag was occured It was also found by electron probe micro-analysis that the Mgo mainly presented in iron oxide compound except hematite,such as magnesiomagnetite in sinter and magnesioferrite in pellet, and a small part of Mgo existed in slag phase. Large amount of Mg2+ entered in octahedron sites of magnetite of pellet of Hangchow stael works during induration period has been examined by use of Mossbausr effect which was ascertaind the mechanism of Mgo concentrated into iron oxide compound and changed the mineral constitasnts of iron ore agglomerates
from avove investigation the effect of Mgo on the metallurgical properties of iron ore agglomerates was abtained. -
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