摘要:
采用唐山本地磁铁矿及高钙粉混合造球, 配合X-射线衍射分析、高温综合热分析等测试手段, 同时运用Fact Sage热力学模拟, 探究碱度及温度变化对球团矿抗压强度的影响规律。结果表明:随着碱度的增加, 球团矿抗压强度呈先上升后下降的趋势, 且在碱度为1.0, 焙烧温度控制在1 250℃时焙烧球团矿抗压强度达到最大。适量的液相有助于Fe3+迁移, 赤铁矿结晶良好, 球团矿抗压强度较大;过量的液相阻碍Fe3+迁移, 赤铁矿与赤铁矿之间的再结晶受到限制, 球团矿抗压强度降低。
关键词:
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球团矿 /
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碱度 /
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焙烧温度 /
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抗压强度
Abstract:
The Tangshan local magnetite and high calcium powder mixing and balling,thermodynamic simulation with X-ray diffraction analysis,high temperature thermal analysis instrument,while the use of Fact Sage,studying on laws of basicity and temperature effects on the strength of the pellets. The results showed that with the increase of basicity,the strength of the pellets was increased and then decreased trend changes,and when the basicity is 1,calcination temperature controlled at 1250 ℃ of pellet roasting ball strength reaches the maximum. Appropriate amount of liquid phase contributes to Fe3+ migration,hematite crystallized the strength of the pellets is larger; the excess phase blocking Fe3+ migration,hematite recrystallization is restricted,reduce the strength of the pellets.