Abstract The effect of the addition of 2CaO·SiO2 solid particles on dephosphorization behavior in carbon-saturated hot metal was investigated. The research results showed that the addition of 2CaO·SiO2 particles have little influence on desilication and demanganization, and the removal of [Si] and [Mn] occurred in the first 5 min with different conditions where the contents of 2CaO·SiO2 particles addition for the conditions 1, 2, 3, 4, and 5 are 0, 2.2, 6.4, 8.6, and 13.0 g, respectively. The final dephosphorization ratios for the conditions 1, 2, 3, 4, and 5 are 61.2%, 66.9%, 79.6%, 63.0%, and 78.1%, respectively. The dephosphorization ratio decreases with the increase of 2CaO·SiO2 particles in the first 3 min. The reason for this is that the dephosphorization process between hot metal and slag containing C2S phase consisted of two stages: Stage 1, [P] transfers from hot metal to liquid slag and Stage 2, the dephosphorization production (3CaO·P2O5) in liquid slag reacts with 2CaO·SiO2 to form C2S–C3P solid solution. The increase of 2CaO·SiO2 particles increases the viscosity of slag and weakens the dephosphorization ability of the stage 1. The SEM and XRD analyses show that the phase of dephosphorization slag with the addition of different 2CaO·SiO2 particles is composed of white RO phase, complex liquid silicate phase, and black solid phase (C2S or C2S–C3P). Because the contents of C2S–C3P and 2CaO·SiO2 in slag and the dephosphorization ability of the two stages are different, the dephosphorization ability with different conditions is different.

中文翻译：

---

添加2CaO·SiO2颗粒对脱磷行为的影响

摘要 研究了2CaO·SiO2固体颗粒的加入对碳饱和铁水脱磷行为的影响。研究结果表明，2CaO·SiO2颗粒的加入对脱硅和脱锰的影响不大，[Si]和[Mn]的去除发生在不同条件下，2CaO·SiO2颗粒的加入对[Si]和[Mn]的去除发生在前5min。条件1、2、3、4、5分别为0、2.2、6.4、8.6、13.0g。条件1、2、3、4和5的最终脱磷率分别为61.2%、66.9%、79.6%、63.0%和78.1%。脱磷率随着前3分钟2CaO·SiO2颗粒的增加而降低。其原因是铁水与含有 C2S 相的炉渣之间的脱磷过程由两个阶段组成：第 1 阶段，[P] 从铁水转移到液态炉渣；第 2 阶段，液态炉渣中的脱磷产物 (3CaO·P2O5) 与 2CaO·SiO2 反应形成 C2S-C3P 固溶体。2CaO·SiO2颗粒的增加增加了渣的黏度，削弱了阶段1的脱磷能力。SEM和XRD分析表明，加入不同2CaO·SiO2颗粒的脱磷渣相由白色RO相组成，复杂的液态硅酸盐相和黑色固相（C2S 或 C2S–C3P）。由于渣中C2S-C3P和2CaO·SiO2的含量及两段脱磷能力不同，不同条件下脱磷能力不同。液渣中的脱磷产物（3CaO·P2O5）与2CaO·SiO2反应生成C2S-C3P固溶体。2CaO·SiO2颗粒的增加增加了渣的黏度，削弱了阶段1的脱磷能力。SEM和XRD分析表明，加入不同2CaO·SiO2颗粒的脱磷渣相由白色RO相组成，复杂的液态硅酸盐相和黑色固相（C2S 或 C2S–C3P）。由于渣中C2S-C3P和2CaO·SiO2的含量及两段脱磷能力不同，不同条件下脱磷能力不同。液渣中的脱磷产物（3CaO·P2O5）与2CaO·SiO2反应生成C2S-C3P固溶体。2CaO·SiO2颗粒的增加增加了渣的黏度，削弱了阶段1的脱磷能力。SEM和XRD分析表明，加入不同2CaO·SiO2颗粒的脱磷渣相由白色RO相组成，复杂的液态硅酸盐相和黑色固相（C2S 或 C2S–C3P）。由于渣中C2S-C3P和2CaO·SiO2的含量及两段脱磷能力不同，不同条件下脱磷能力不同。SEM 和 XRD 分析表明，添加不同 2CaO·SiO2 颗粒的脱磷渣相由白色 RO 相、复合液态硅酸盐相和黑色固相（C2S 或 C2S-C3P）组成。由于渣中C2S-C3P和2CaO·SiO2的含量及两段脱磷能力不同，不同条件下脱磷能力不同。SEM 和 XRD 分析表明，添加不同 2CaO·SiO2 颗粒的脱磷渣相由白色 RO 相、复合液态硅酸盐相和黑色固相（C2S 或 C2S-C3P）组成。由于渣中C2S-C3P和2CaO·SiO2的含量及两段脱磷能力不同，不同条件下脱磷能力不同。