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Chin. J. Process Eng. ›› 2017, Vol. 17 ›› Issue (5): 1041-1046.DOI: 10.12034/j.issn.1009-606X.217121

• Process & Technology • Previous Articles     Next Articles

Dissolution Behavior of Lime Particles in CaO-FeO-SiO2-P2O5 Slag

Yunjin XIA1,2*,  Xiaopan LI1,  Jie LI1,2,  Dingdong FAN1,2,  Xin GUO1     

  1. 1. School of Metallurgical Engineering, Anhui University of Technology, Ma′anshan, Anhui 243002, China; 2. Key Lab of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Ma′anshan, Anhui 243002, China
  • Received:2017-01-17 Revised:2017-02-18 Online:2017-10-20 Published:2017-10-10
  • Contact: XIA Yun-jin xyjsssss@aliyun.com

氧化钙颗粒在CaO-FeO-SiO2-P2O5体系炉渣中的溶解行为

夏云进1,2*， 李孝攀1， 李 杰1,2，范鼎东1,2， 郭 鑫1     

  1. 1. 安徽工业大学冶金工程学院，安徽 马鞍山 243002；2. 冶金减排与资源综合利用教育部重点实验室，安徽 马鞍山 243002
  • 通讯作者: 夏云进 xyjsssss@aliyun.com
  • 基金资助:
    复合相炉渣中磷的富集基金研究;基于CaO-SiO2-Al2O3-FetO-MgO高铝无氟渣系的中高磷铁水转炉脱磷作用机理研究;转炉能量高效利用与低排放工艺技术研究;超低温环境友好型高强钢筋关键技术研究及产业化

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Abstract: The dissolution behavior of lime particles in CaO?FeO?SiO2?P2O5 slag at 1400℃ was studied by putting the average size about 70 ?m lime into the CaO?SiO2 saturated slag. The results showed that six areas were formed along calcium oxide around after the lime particles were adding into the slag, namely unmelted calcium oxide region, transition layer of lime dissolution transformation to calcium ferrite, calcium ferrite layer, discontinuous solid solution layer, dense solid solution layer and original slag. The C2S?C3P solid solution was formed in 5 s, its P2O5 content reached the maximum about 120 s, then the size of solid solution increased and P2O5 content decreased with time. When P2O5 was in slag, the xC2S?C3P layer was formed in the reaction interface of lime, instead of C2S, the formation of C2S?C3P solid solution layer prevented the dissolution of lime.

Key words: CaO-FeO-SiO2-P2O5 slag, lime particles, lime dissolution, C2S-C3P solid solution

摘要： 在1400℃下，将平均尺寸约70 ?m的石灰加入硅酸二钙饱和的CaO?FeO?SiO2?P2O5体系的炉渣中，研究了石灰颗粒在炉渣中的溶解行为. 结果表明，石灰加入炉渣中沿CaO周围形成了6个区域：未熔氧化钙区域、石灰溶解向铁酸钙层转化的过渡层、铁酸钙层、不连续的固溶体层、致密的固溶体层、基体渣层；石灰加入5 s内即可形成C2S?C3P固溶体层，其中P2O5含量约在120 s时达到最大，之后随时间增加，固溶体颗粒尺寸不断增加，固溶体中P2O5含量降低；炉渣中含P2O5时，在石灰界面形成的壳层为xC2S?C3P而不是C2S，C2S?C3P固溶体层形成阻碍了石灰溶解.

关键词: CaO-FeO-SiO2-P2O5体系炉渣, 石灰颗粒, 石灰溶解, C2S-C3P固溶体