冀东磁铁矿球团的氧化机理

钢铁研究学报, 2007, 19(8): 7-0.

冀东磁铁矿球团的氧化机理

吕庆 , 亢立明 , 孙丽芬 , 刘曙光

1.1. 河北理工大学冶金与能源学院, 河北唐山 063009

2.2. 东北大学材料与冶金学院, 辽宁沈阳 110004

3. 3. 唐山钢铁股份有限公司, 河北唐山 063000

1.1. Coolege of Metallurgy and Energy, Hebei Polytechnic University, Tangshan 063009, Hebei, China

2. 2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China

3. 3. Tangshan Iron and Steel Co Ltd, Tangshan 063000, Hebei, China

关键词：冀东磁铁矿;球团;温度;氧化机理

Oxidation Mechanism of Jidong Magnetite Pellets

L Qing , KANG Liming , SUN Lifen , LIU Shuguang

Keywords： Jidong magnetite concentrate;pellet;temperature;oxidation mechanism

对冀东磁铁矿球团焙烧的氧化机理进行了研究。结果表明，氧化温度对球团氧化有重要的影响，氧化温度以900 ℃左右为宜。由于冀东磁铁矿自身的特点，氧首先吸附在颗粒表面的解理缝周围，并与解理缝周围的磁铁矿反应形成针状或片状赤铁矿；然后氧化过程沿磁铁矿的八面体或解理缝继续发展，形成条状或网状结构的赤铁矿，最终完全氧化。脉石成分对球团氧化过程没有影响。

The oxidation mechanism of Jidong magnetite pellets was studied. The results reveal that oxidizing temperature has important effect on oxidation of pellets and the reasonable oxidizing temperature is about 900 ℃. Because there are incompletely cleavages in Jidong magnetite concentrate grain, and octahedron crack exists in magnetite crystal, oxidation develops along octahedron crack or cleavage seam, strip oxidation or reticulation texture is formed, and then magnetite is oxidized to hematite completely. Gangue has no effect on pellets′ oxidation.

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