Effect of BaSO_(4) on phase composition and sintering process of iron ore fines  

作　　者：Jian-tao Ju Chen-mei Tang Guang-heng Ji Xiang-dong Xing Gui-qing Zhao Xin-tai Jiang Feng-lin Lu 

机构地区：[1]School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an,710055,Shaanxi,China [2]Research Center of Metallurgical Engineering and Technology of Shaanxi,Xi’an University of Architecture and Technology,Xi’an,710055,Shaanxi,China [3]JISCO Iron and Steel Research Institute,Jiayuguan,735100,Shaanxi,China

出　　处：《Journal of Iron and Steel Research International》2022年第3期408-417,共10页

基　　金：financially supported by National Natural Science Foundation of China(Grant No.51604209);Natural Science Basic Research Program of Shaanxi(Program No.2019JLP-05).

摘　　要：Iron ore containing BaSO_(4) may have a series of effects on the quality of the sinter and performance of the blast furnace.Thus,the effect mechanism of BaSO_(4)(0-6.0 mass%)on the compressive strength,mineral composition,and microstructure of the sinter was investigated.The experimental results show that the compressive strength of the sintered samples initially increases and then decreases when the BaSO_(4) content increases from 0 to 6.0 mass%,reaching a peak value of 12.78 kN with a BaSO_(4) content of 1.0 mass%.Thermal analysis indicates that BaSO_(4) initially decomposes to produce BaO at 1468 K in the presence of iron ore.BaO combines with Fe_(2)O_(3) forming barium ferrite(Ba_(2)Fe_(6)O_(11)),which exists in the sintered sample with a granular form.BaO also dissolves in calcium ferrite and slag to promote the formation of calcium ferrite and barium glass,respectively.The content of needle-like calcium ferrite gradually increases and then decreases with the increase in BaSO_(4) content.Hematite exists in a plate-like form.The generation of dicalcium ferrite is promoted by increasing the BaSO_(4) addition from 2.0 to 6.0 mass%.

关 键 词：SINTER Barium sulfate HEMATITE Barium ferrite Mineral structure 

分 类 号：O62[理学—有机化学]