CaO-SiO2-FeO-B2O3-MnO脱磷渣熔化温度和粘度特性

doi:10.12034/j.issn.1009-606X.217385

摘要/Abstract

摘要： 采用FactSage模拟软件和修正后的Einstein?Roscoe公式计算了无氟型CaO?SiO2?FeO?B2O3?MnO预熔脱磷渣的熔化温度和粘度，考察了碱度和各成分配比对脱磷渣熔化温度和粘度的影响，得到合理的脱磷渣成分配比及控制区间和适宜的熔池温度，采用正交法进行了实验验证，通过直观分析、方差分析和主效应分析优选出最佳配比. 结果表明，该渣系粘度随碱度、FeO含量和助熔剂含量提高而降低，1400℃时最佳配比为碱度R?4.0, B2O3含量9wt%, MnO含量10wt%, FeO含量45wt%. 计算的熔化温度为1195.51℃，粘度为0.207 Pa×s，实验所测熔化温度为1192.21℃，粘度为0.199 Pa×s，计算值与实测值相近，表明正交法优选方案可靠.

关键词: FactSage软件, 脱磷渣, 熔化温度, 粘度, 正交法

Abstract: In order to reduce the melting temperature and viscosity of dephosphorized slag, many metallurgical workers added CaF2 as the melting agent, but fluorine ion was very harmful to the environment, and it eroded the lining of the furnace, and dephosphorized slag was difficult to be reused. Therefore, for the sake of solving the above problems, it was necessary to explore a new fluorine-free or low-fluorine dephosphorizer. Boron element were beneficial to the plant, the choice of B2O3 dephosphorization slag flux, the better preparation of fertilizer by the dephosphorization slag. Boron resources were rich in our country, therefore, in the hot metal dephosphorization, B2O3 can displace CaF2. In order to systematically study the melting temperature and the comprehensive effect of viscosity characteristics of iron water pre-melting dephosphorized slag, the melting temperature and viscosity of CaO?SiO2?FeO?B2O3?MnO pre-melting dephosphorization slag of type of fluorine-free were calculated and the influence law of alkalinity and composition ratio on melting temperature and viscosity of dephosphorization slag seeking reasonable dephosphorization slag into distribution ratio and control interval, suitable bath temperature were investigated by using FactSage simulation software and the modified Einstein?Roscoe formula. The alkalinity and composition ratio was optimized by orthogonal analysis, variance analysis and main effect analysis. The results showed that the viscosity of the slag decreased with the increase of alkalinity, FeO content and flux content. At 1400℃, the optimum ratio were alkalinity of 4.0, the content of B2O3 9%, MnO of 10%, FeO of 45%. By caclution, the melting temperature was 1195.51℃ and the viscosity was 0.207 Pa×s. By the experimental verification, the measured melting temperature was 1192.21℃, the viscosity was 0.199 Pa×s. After comparison, the calculated date was similar to the measured data. It was known that the orthogonal method had its rationality and accuracy in the actual production process. Based on the analysis results, the optimal combination of slag components was selected to provide theoretical basis and data support for the dephosphorization production of steelmaking.

Key words: FactSage software, dephosphorization slag, melting temperature, viscosity, orthogonal method

杨双平魏起书王琛杨波庞锦琨. CaO-SiO₂-FeO-B₂O₃-MnO脱磷渣熔化温度和粘度特性[J]. 过程工程学报, 2018, 18(5): 1013-1019.

Shuangping YANG Qishu WEI Chen WANG Bo YANG Jinkun PANG. Melting temperature and viscosity characteristic of dephosphorization slag contained CaO-SiO₂-FeO-B₂O₃-MnO[J]. Chin. J. Process Eng., 2018, 18(5): 1013-1019.

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CaO-SiO₂-FeO-B₂O₃-MnO脱磷渣熔化温度和粘度特性

Melting temperature and viscosity characteristic of dephosphorization slag contained CaO-SiO₂-FeO-B₂O₃-MnO

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