F、K、Na对球团矿形貌及组成的影响
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摘要
为贴近包钢白云鄂博铁精矿的真实情况,采用澳大利亚矿作为基础含铁原料,K_2O、Na_2O、氟分别以钾板岩、钠辉石岩以及CaF_2的形式加入,研究K、Na、F对球团矿形貌及组成的影响。研究表明,焙烧后大部分渣相以脉石形式存在,且空隙率较大;F易与相关氧化物反应,最终以气体形式逸出,增大团块的孔隙率;K、Na会生成很多低熔点化合物,填充于孔隙中,降低了团块的孔隙率。
Influence of K_2O,Na_2O,and fluoride on pellet morphology and composition was investigated by addition of K_2O,Na_2O and fluoride in form of potassium slate,sodium pyroxenite,and CaF_2 respectively applying ores from Australia as basics iron-bearing materials as close as to Baiyunebo iron concentrate of Baotou Steel.The results show that most of slag phase is gangue,and porosity is very large.Fluorine easily reacts with related oxides and escapes as fluoride gas to increase porosity of briquetting.Low melting point compounds produced by addition of K and Na will fill in pores and reduce porosity of briquetting.
Influence of K_2O,Na_2O,and fluoride on pellet morphology and composition was investigated by addition of K_2O,Na_2O and fluoride in form of potassium slate,sodium pyroxenite,and CaF_2 respectively applying ores from Australia as basics iron-bearing materials as close as to Baiyunebo iron concentrate of Baotou Steel.The results show that most of slag phase is gangue,and porosity is very large.Fluorine easily reacts with related oxides and escapes as fluoride gas to increase porosity of briquetting.Low melting point compounds produced by addition of K and Na will fill in pores and reduce porosity of briquetting.
引文
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[2]曹立刚.包钢烧结球团技术进步[J].包钢科技,2009,35(5):7-11.
[3]皮晓东,孙权,罗果萍,等.球团矿还原膨胀机理研究概况[J].烧结球团,2017,42(4):28-34.
[4]罗果萍,孙权,王永斌,等.碱金属对Fe2O3压团焙烧过程的影响[J].有色金属(冶炼部分),2016(3):55-58.
[5]何明泽.MgO及K,Na,F对球团矿渣相组成及性质的影响[D].内蒙古包头:内蒙古科技大学,2016.
[6]戚立宽.Na2O-CaO-Fe2O3系物相关系及固相反应动力学[J].有色金属(冶炼部分),1965(10):50-53.
[7]孙权.K、Na和MgO对球团矿还原产物晶格结构的交互影响[D].内蒙古包头:内蒙古科技大学,2016.
[8]周取定,郭春泰.碱金属和氟对球团矿还原膨胀影响机理的研究[J].金属学报,1986,22(6):249-256.
[9]闫俊萍,那树人,马燕生,等.氟在烧结矿中的赋存状态及其对烧结矿软熔性能的影响[J].钢铁,1997,32(3):1-3.
[10]黄继业,张耀轩,宋建成,等.钾、钠、氟在高炉冶炼过程中的行为[J].钢铁,1983,18(12):24-31.
[11]漆光瑯.钾、钠、氟、钙对球团还原膨胀的影响[J].钢铁,1987,22(1):48-52.