Study on the Refining of Steel by Manganese Ore

锰矿炼钢的研究

• 批准号: 03650542
• 负责人: SHINOZAKI Nobuya
• 金额: $ 1.28万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650542/
• 关键词: Manganese ore; Dephosphorization; Desulfurization; Kinetics; Interfacial turbulence; 界面撹乱; 精錬; CaF_2系フラックス

Much attention has recently been paid to utilizing manganese ore in making steel because it is inexpensive. In order to utilize manganese ore more useful, the simultaneous reactions of dephosphorization and desulfurization by manganese oxide were investigated.Experiments were carried out by reacting CaF_2-CaO-Al_2O_3-Mn_3O_4 flux and liquid iron at 1600ﾟC under argon atmosphere. Several iron samples were taken at appropriate intervals during a run and analyzed for manganese, phosphorus, sulfur and oxygen contents for the rate analysis. Flux sample was taken for estimating the phosphate capacity and the sulfide capacity of flux. The results are as follows; 1) Reactions of dephosphorization, desulfurization, transfer of manganese from flux to liquid iron and distribution of oxygen between flux and iron occurred. These reactions reached an equilibrium within a short period. 2) From the estimation of the phosphate capacity and the sulfide capacity, it was found that the flux containing manganese oxide could refine steel. 3) Under conditions a rapid transfer of sulfur or oxygen between flux and liquid iron occurred at initial period, also the other reactions-that is, dephosphorization and transfer of manganese from flux to iron-proceeded fast. This phenomenon was presumed to the interfacial turbulence. 4) However, the results by model calculation made clear the impossibility of refining steel by present flux with so short time and the necessity for stirring steel mechanically.

由于锰矿价格低廉，近年来人们非常重视利用锰矿炼钢。为了更好地利用锰矿石，对氧化锰脱磷脱硫的同时反应进行了研究。在1600℃的氩气气氛下，用CaF_2-CaO-Al_2O_3-Mn_3O_4助熔剂与铁液反应。在运行过程中，以适当的间隔取几个铁样品，分析锰、磷、硫和氧的含量，以进行速率分析。取焊剂样品，测定了焊剂的磷酸盐容量和硫化物容量。研究结果如下：1)发生了脱磷、脱硫、锰从助熔剂向铁液转移以及氧在助熔剂与铁之间的分配等反应。这些反应在短时间内达到平衡。2)通过对磷酸盐容量和硫化物容量的估算，发现含锰的助熔剂可以精炼钢。3)在熔剂和铁液之间硫或氧的快速转移的条件下，其他反应（即脱磷和锰从熔剂向铁的转移）也进行得很快。这一现象被推测为界面湍流。4)然而，模型计算的结果表明，用现有的熔剂在短时间内精炼钢是不可能的，必须对钢进行机械搅拌。