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Effect of Al2O3 on Enrichment of Phosphorus in Hot Metal Dephosphorization Slag

机译：Al 2 O 3 对铁水脱磷渣中磷富集的影响

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The phosphorus enrichment behavior in dephosphorization slag was investigated by slag modification with Al_(2)O_(3) in the present study. The mineral phase of the slag samples were measured by mineral phase microscope, SEM+EDS and XRD. The mechanism of Al_(2)O_(3) modification was discussed according to FactSage calculation. The results show that phosphorus was mainly existed in nC_(2)S–C_(3)P solid solution and Al_(2)O_(3) modification was beneficial to the enrichment of phosphorus. The content of phosphorus in phosphorus-rich phase was increased to 5.10% and 9.15% with 8% and 11% Al_(2)O_(3) addition. With the slag temperature decreases, Ca_(3)(PO_(4))_(2) and Ca_(2)SiO_(4) firstly precipitated and formed the nC_(2)P–C_(3)P solid solution. The addition of Al_(2)O_(3) has a positive influence on the reaction of Al_(2)O_(3) and nC_(2)S–C_(3)P solid solution. Al_(2)O_(3) could react with the initially precipitated low phosphorus nC_(2)S–C_(3)P solid solution to produce higher phosphorus n′C_(2)S–C_(3)P solid solution (n′
机译：本研究通过Al_（2）O_（3）对炉渣进行改性研究了脱磷炉渣中磷的富集行为。用矿物相显微镜，SEM + EDS和XRD测量炉渣样品的矿物相。根据FactSage计算，讨论了Al_（2）O_（3）修饰的机理。结果表明，磷主要存在于nC_（2）S–C_（3）P固溶体中，Al_（2）O_（3）的改性有利于磷的富集。通过添加8％和11％的Al_（2）O_（3），富磷相中的磷含量增加到5.10％和9.15％。随着炉渣温度的降低，Ca_（3）（PO_（4））_（2）和Ca_（2）SiO_（4）首先析出并形成nC_（2）P–C_（3）P固溶体。 Al_（2）O_（3）的添加对Al_（2）O_（3）与nC_（2）S–C_（3）P固溶体的反应具有积极影响。 Al_（2）O_（3）可以与最初沉淀的低磷nC_（2）S–C_（3）P固溶体反应生成更高的磷n'C_（2）S–C_（3）P固溶体（n ′

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