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reduction by N2-CO mixed with 8% hydrogen gas at 1373 K was examined by BES and the results are shown in Fig. 5. It can be seen from Fig. 5(a) that the raw ore of PTC pellet is mainly homogeneous particals... for this effect, one is that H2 accelerates the chemical reaction, and the other is that the addition of H2 gas can improve the porosity of pellet intensively. It is noteworthy that this effect......
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of oxidized pellet prepared from pyrite cinder by moisture grinding BAI Guo-hua1, ZHOU Xiao-qing2, FAN Xiao-hui1, LI Jian-chen1 (1. School of Resources Processing and Bioengineering, Central South..., the characteristic of oxidized pellet prepared from pyrite cinder and the mechanism of moisture grinding on pellet preparation were studied. The results show that the strength of green balls is very low......
the pellet swelling rate. Key words: low silica magnesium pellet; calcination temperature; reduction swelling rate; apparent activation energy 还原膨胀率是球团矿的重要冶金性能指标之一.一般球团矿在还原过程中都会出现体积膨胀,强度相应降低的情况.球团矿体积膨胀...1200,1230,1260,1280和1300 ℃的温度下焙烧了1.5%镁球和3.0%镁球,图1所示为焙烧过程球团矿抗压强度随焙烧温度的变化曲线.从图1可知,当焙烧温度低于1230 ℃时,1.5%镁球和3.0%镁球的抗压强度都比较低,在1700 N/pellet以下.随着焙烧温度的提高,两种球团的抗压强度都提高.当焙烧温度提高到1280 ℃时,抗压强度分别达到了 2848 N/pellet和2613......
(2012)08-2896-04 Three-dimensional temperature field simulation model of rotary kiln for iron ore oxidized pellet FAN Xiao-hui, LI Jun, CHEN Xu-ling, WANG Yi, GAN Min (School of Minerals Processing...-ratio of flue gas temperature is more than 90%. Key words: iron ore oxidized pellet; rotary kiln; three-dimensional model; temperature distribution 我国的钢铁工业发展迅速,2011年我国钢产量已达到6.83×108 t.目前,高碱度烧结矿配加酸性球团矿和(或......
土制备及其在铁精矿球团中的应用[J]. 中南大学学报(自然科学版), 2014, 45(2): 341-342. HUANG Zhucheng, LI Tiehui, YI Lingyun, et al. Preparation of fibrosis bentonite and its application in iron ore concentrate pellet[J]. Journal... property of bentonite used in iron pellet ZHONG Qiang, YANG Yongbin, MENG Feiyu, LI Qian, JIANG Tao (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China......
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that, the higher lever of the pre-reduced pellet, the less content of the Fe3O4. And then, the contents of wustite and Fe increase gradually. Meanwhile microwave-absorbed characteristics tapers off which still has some absorbing ability. The higher degree of the pre-reduced pellet, the higher the sponge iron metallization is. The mass ratio of C to O is 1.75:1, reduction time is 48 min, the degree......
rising behavior of oxidized pellet in heating process on microwave field HU Bing1, HUANG Zhu-cheng1, JIANG Tao1, PENG Hu2 (1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; 2. Changsha Syno-Therm Co. Ltd., Changsha 410013, China) Abstract: The structure change and temperature rising behavior of oxidized pellet by microwave heating under......
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