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Mathematical Expression of Manganese Distribution in Steelmaking Process by Quadratic Formalism Based on Regular Solution Model

基于正则解模型的二次形式炼钢过程中锰分布的数学表达

基本信息

批准号：
61550487
负责人：
HINO Mitsutaka
金额：
$ 1.22万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550487/
关键词：
Regular solution model Manganese distribution 2乗形式

项目摘要

In the present work, an approximate validity of the regular solution model for slag was studied to formulate the equilibrium relation of manganese distribution for all the experimental results including the present work and the other previous studies, in succession to the successful application of the model for oxygen and phosphorous distribution between slag and metal in steelmaking process.In the first step, measurements of the iron oxide activity in MnO-bearing slags have been made to evaluate the effects of slag components on the manganese distribution between slag and metal in steelmaking process. For this purpose, the chemical equilibria were determined among solid iron, H_2/H_2O gas mixture and ternary Fe_tO-SiO_2-MnO or quaternary Fe_tO-SiO_2-MnO-M_xO_y (M_xO_y = CaO, MgO, Na_2O, P_2O_5) slags to determine the values of the interaction energies between cations, where Fe_tO-Sio_2-MnO is a fundermental system when we consider the manganese distribution, and CaO and MgO are basic … More slag components in steelmaking process, and Na_2O is used as simultaneous agent for dephosphorization and desulphurization not only in hot metal treatment but also in secondary refining of steel, and P_2O_5 is product in dephosphorization process.In the second step, the manganese distribution between slag and liquid iron has been studied under Ar atmosphere at the temperatures from 1550 to 1650 ゜C. The slag systems studied at present work were of Fe_tO-SiO_2-MnO sturated with (Mn,Fe)O, Fe_tO-SiO_2-MnO-MgO saturated with (Mg,Fe,Mn)O or 2(Mg,Fe,Mn)O・SiO_2 and Fe_tO-SiO_2-MnO-CaO saturated with (Ca,Mn,Fe)O, in order to make sure the validity of the model. The previous data employed to check the applicability of the model to manganese distribution were the experimental results by Krings et al., Maurer et al., Korber et al. Chipman et al., Bell et al., Fischer et al. and Suito et al..From the results obtained, it was confirmed that the regular solution model was satisfied for all the experimental results including the present work and the previous studies by other investigators except for extremely iron oxide rich region.From the equilibrium relation obtained, the manganese distribution ratio, L_<Mn> = (%MnO)/[%Mn], the activities and activity coefficients of slag constituents can be calculated as a function of slag composition and temperature. The manganese and oxygen contents in iron in equilibrium with the slag can be evaluated within the accuracy of <plus-minus> 10 % from the model. Less

本文在成功应用渣-金属间氧、磷分配模型的基础上，研究了渣正规溶液模型的近似有效性，并建立了适用于本研究和以往研究的渣-金属间锰平衡分配关系式。通过测定含MnO炉渣中氧化铁的活度，研究了炼钢过程中炉渣成分对渣-金属间锰分配的影响。为此，测定了固体铁、H_2/H_2O混合气体和三元Fe_tO-SiO_2-MnO或四元Fe_tO-SiO_2-MnO-M_xO_y之间的化学平衡（M_xO_y = CaO，MgO，Na_2O，P_2O_5）渣系中，Fe_tO-SiO_2-MnO是考虑锰分布的基本体系，CaO和MgO是碱性的 ...更多信息在第二步中，在1550 ~ 1650 ℃的Ar气氛下，研究了锰在渣-铁间的分配。本文研究的渣系为（Mn，Fe）O饱和的Fe_tO-SiO_2-MnO、（Mg，Fe，Mn）O饱和的Fe_tO-SiO_2-MnO-MgO或2（Mg，Fe，Mn）O·SiO_2和（Ca，Mn，Fe）O饱和的Fe_tO-SiO_2-MnO-CaO。用于检查模型对锰分布的适用性的先前数据是Krings等人的实验结果，Maurer等人，Korber等人，奇普曼等人，Bell等人，Fischer等人和Suito等人。结果表明，除极富铁区外，本工作和前人的研究结果均符合规则溶液模型，并由此关系式计算出锰的分配比L <Mn>=（%MnO）/[%Mn]、炉渣各组分的活度和活度系数随炉渣组成和温度的变化关系。利用该模型可以估算出与渣相平衡的铁中锰和氧的含量，精度在10%以内<plus-minus>。少