Effects of Interfacial Oxygen Potential and Slag Phase Changing during Slag Formation Process on Dephosphorization Behavior
Effects of Interfacial Oxygen Potential and Slag Phase Changing during Slag Formation Process on Dephosphorization Behavior
复制标题
成渣过程中界面氧势和渣相变化对脱磷行为的影响
DOI：
10.2355/isijinternational.isijint-2019-052
复制
发表时间：
2019-01-01
影响因子：
1.8
通讯作者：
Hou, Guangda
中科院分区：
文献类型：
--
作者：
Xia, Yunjin;Li, Jie;Hou, Guangda
利用XRD和SEM研究了脱碳渣回用过程中界面氧势和渣相变化对脱磷行为的影响。研究结果表明，在条件1（石灰和Fe 2 O3初始一次性投加）下，磷的去除主要在前5 min内完成，而在条件2（石灰和Fe 2 O3分次投加）和条件3（石灰初始一次性投加、Fe 2 O3分次投加）下，磷的去除主要在5 ~ 10 min内完成。条件1的脱磷率约为78.9%，显著高于条件2和条件3的脱磷率。脱碳渣的物相主要由2CaO·SiO2 - 3CaO、P2 O 5和Ca 3Fe 2 O 5组成，磷主要富集在2CaO·SiO2 - 3CaO、P2 O 5中。脱碳渣循环使用后，在不同条件下反应的渣相基本相同，均由FeO、2CaO·SiO2、2CaO·SiO2 - 3CaO、P2 O 5和Ca 3Fe 2 O 5组成。而2CaO·SiO2和2CaO·SiO2 - 3CaO的含量变化较大。不同条件下脱磷行为的差异是由于界面氧势和成渣过程中渣相变化的差异所致。
The effects of interfacial oxygen potential and slag phase changing during slag formation process on dephosphorization behavior when the decarburization slag is recycled are investigated by XRD and SEM. The research results show that the remove of phosphorus is mainly accomplished in the first 5 minutes for the condition 1(initial lump-sum addition of lime and Fe 2 O 3 ), however the remove of phosphorus is mainly done from 5 to 10 minutes for the conditions 2(divided addition of lime and Fe 2 O 3 ) and 3(initial lump-sum addition of lime and divided addition of Fe 2 O 3 ). The dephosphorization rate of the condition 1 is about 78.9%, which is significantly higher than those of the conditions 2 and 3. The phase of decarburization slag is mainly made up of 2CaO·SiO 2 -3CaO·P 2 O 5 and Ca 3 Fe 2 O 5 , the phosphorus mainly enriches in 2CaO·SiO 2 -3CaO·P 2 O 5. After the recycling of decarburization slag, the slag phase with reactions under different conditions is basically the same, which is made up of FeO, 2CaO·SiO 2 , 2CaO·SiO 2 -3CaO·P 2 O 5 and Ca 3 Fe 2 O 5 . However, the contents of 2CaO·SiO 2 and 2CaO·SiO 2 -3CaO·P 2 O 5 change seriously. The reason for the difference of dephosphorization behavior is that the interfacial oxygen potential and the slag phase changing during slag formation process are significantly different between different conditions.