KINETIC STUDY ON DEPHOSPHORIZATION REACTION BETWEEN LIME-BASE SLAG AND HIGH CARBON MOLTEN IRON

石灰基渣与高碳铁水脱磷反应动力学研究

• 批准号: 59470049
• 负责人: MORI KAZUMI
• 金额: $ 5.06万
• 依托单位: NAGOYA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59470049/
• 关键词: Hot metal treatment; Activity of slag components; Slag-metal reaction; Dephosphorization reaction; Rephosphorization reaction; Oxygen potential; 物質移動

THE PRESENT STUDY HAS AIMED AT GETTING SCIENTIFIC KNOWLEDGE ON DEPHOSPHORIZATION IN HOT METAL TREATMENT. THE CHARACTERISTIC POINTS IN THIS STUDY ARE: 1)BASE SLAG OF CaO- <Li_2O> - <SiO_2> SYSTEM IS NEWLY USED, AND 2)STIRRING OF THE MELT IS CONTROLLED IN THE EXPERIMENT.1. KERAMAX ELECTRIC FURNACE IS NEWLY EQUIPPED. WITH USING THIS FURNACE, CONTROL OF TEMPERATURE AND ATMOSPHERE WERE EASILY PERFORMED. 2. MEASUREMENTS WERE MADE ON SILICA ACTIVITY, ACTIVITY OF FeO ADDED AS THE REACTION COMPONENT, AND PHOSPHATE CAPACITY OF THE BASE SLAG. THESE HAVE PROVIDED USEFUL INFORMATION ON FUNDAMENTAL PROPERTIES OF BASE SLAG SYSTEM. 3. STUDIES HAVE BEEN MADE ON THE RATE OF DEPHOSPHORIZATION REACTION OF HIGH CARBON MOLTEN IRON WITH FeO-CONTAINING SLAGS. IT WAS CLEARLY SHOWN THAT DURING THE REACTION A CHANGE FROM DEPHOSPHORIZATION TO REPHOSPHORIZATION OCCURRED. REACTION MECHANISM OF DEPHOSPHORIZATION IS EXAMINED ON THE BASIS OF REACTION MODEL. 4. WITH VARIATION OF THE STARTING PHOSPHORUS CONCENTRATIONS I … More N METAL AND SLAG, VARIOUS REACTIONS RANGED FROM DEPHOSPHORIZATION TO REPHOSPHORIZATION WERE PERFORMED. FROM THE DATA IN QUASI-EQUILIBRIUM STATE, VALUES OF OXYGEN POTENTIAL AT THE SLAG-METAL INTERFACE IS OBTAINED. 5. TO OBTAIN USEFUL INFORMATION ON CLARIFYING THE MECHANISM OF DEPHOSPHORIZATION, KINETIC STUDIES HAVE BEEN MADE ON SILICON OXIDATION IN SLAG-METAL SYSTEM. FROM THE STUDY, THE EFFECTS OF STIRRING IN THE METAL AND SLAG PHASES AND CO EVOLUTION AT THE SLAG-METAL INTERFACE ARE CLARIFIED. ON THE BASIS OF A REACTION MODEL, THE OXYGEN POTENTIAL AT THE SLAG-METAL INTERFACE DURING SILICON OXIDATION IS ESTIMATED. THIS WOULD PROVIDE FUNDAMENTAL DATA ON ESTABLISHING THE STRICT DEPHOSPHORIZATION REACTION MODEL. 6. FURTHER STUDIES ARE BEING PLANNED AS NEW RESEARCH PROJECTS ON 1)DEVELOPING STRICT REACTION MODEL WHICH COULD EXPLAIN THEORETICALLY THE RELATIONSHIP BETWEEN VARIOUS REACTIONS OCCURRING BETWEEN SLAG AND METAL AND 2)ELUCIDATING THE EFFECT OF THE BEHAVIOR OF FERRIC OXIDE ON DEPHOSPHORIZATION. Less

本研究旨在获得铁水处理脱磷的科学认识。本研究的主要特点是：1）采用了新的CaO系底渣<Li_2O><SiO_2>; 2）控制了熔体的搅拌。KERAMAX电炉新投产。使用这种炉，温度和气氛的控制很容易实现。2.测定了炉渣的硅活度、作为反应组分加入的FeO活度和磷酸盐容量。这些结果为底渣系的基本性质提供了有用的信息。3.研究了含FeO渣系对高碳铁液脱磷反应的影响。结果清楚地表明，在反应过程中发生了从脱磷到再磷的变化。在反应模型的基础上，对脱磷反应机理进行了探讨。4.随着起始磷浓度的变化I ...更多信息 研究了金属和炉渣在脱磷过程中的各种反应。根据准平衡状态下的数据，得到了渣-金界面的氧势值。5.为了获得阐明脱磷机理的有用信息，对渣-金属体系中硅的氧化进行了动力学研究。通过研究，阐明了搅拌在金属和渣相中的作用以及渣-金属界面处CO的析出。在反应模型的基础上，估算了硅氧化过程中渣-金属界面的氧势。这为建立严格的脱磷反应模型提供了基础数据。6.进一步的研究工作是：（1）建立严格的反应模型，从理论上解释渣-金属间各种反应之间的关系;（2）研究氧化铁对脱磷的影响。少

项目成果

MORI, KAZUMI: "OXYGEN POTENTIAL AT THE SLAG-METAL INTERFACE DURING DEPHOSPHORIZATION OF HIGH CARBON CONCENTRATION OF MOLTEN IRON" TETSU-TO-HAGANE, LECTURE PREPRINT (TO BE PUBLISHED ON OCTOBER, 1987 AT LECTURE GRAND MEETING OF ISIJ).

MORI, Kazumi：“高碳浓度铁水脱磷过程中渣金属界面的氧势” TETSU-TO-HAGANE，讲座预印本（将于 1987 年 10 月在 ISIJ 讲座盛会上发表）。

潘偉: 鉄と鋼.

潘伟：钢铁。

森一美: 鉄と鋼,講演概要集.

Kazumi Mori：Tetsu to Hagane，讲座摘要集。

PAN, WEI: "OXIDATION REACTION OF SILICON IN MOLTEN IRON OF HIGH CARBON CONCENTRATION BY FeO CONTAINING SLAG" TETSU-TO-HAGANE (SENT FOR PUBLICATION ON JANUARY, 1987).

潘伟：“含 FeO 渣对高碳浓度铁水中硅的氧化反应”TETSU-TO-HAGANE（1987 年 1 月出版）。

MORI, KAZUMI: "KINETICS OF DEPHOSPHORIZATION OF HIGH CARBON CONCENTRATION MOLTEN IRON" TETSU-TO-HAGANE, LECTURE PREPRINT (TO BE PUBLISHED ON OCTOBER, 1987 AT LECTURE GRAND MEETING OF ISIJ).

MORI, KAZUMI：“高碳浓度铁水脱磷动力学”TETSU-TO-HAGANE，讲座预印本（将于 1987 年 10 月在 ISIJ 讲座盛会上发表）。