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Influences of Binders on Properties of Highalumina Repairing Mix for Medium-frequency Induction Furnace
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作者 FANG Binxiang GAO Xiong +1 位作者 ZHAO Yi SHEN Mingke 《China's Refractories》 CAS 2013年第2期20-23,共4页
Three kinds of high-alumina repairing mixes for medium-frequency induction furnace were prepared by ramming method with sodium silicate, phosphoric acid and aluminium dihydrogen phosphate as binder, respectively. Phys... Three kinds of high-alumina repairing mixes for medium-frequency induction furnace were prepared by ramming method with sodium silicate, phosphoric acid and aluminium dihydrogen phosphate as binder, respectively. Physical properties of the specimens heat treated at different temperatures were tested and compared. The results show that the specimen bonded by sodium silicate behaves much higher strength after fired at 1 600 ℃ compared with the specimen, bonded by phosphoric acid or aluminium dihydrogen phosphate. Due to more liquid phase formation the properties of specimen bonded by sodium silicate are poor with a low strength and a large volume shrinkage at high temperatures. Meanwhile. the speeimen bonded by phosphoric acid and aluminium dihydrogen phosphate, respectively, show relatively high strengths and slight volume expansions at high temperatures because of in-situ mullite formation. 展开更多
关键词 sodium silicate phosphoric acid aluminium dihydrogen phosphate ramming mullite induction furnace high-alumina repairing mix
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Numerical Simulation of Electromagnetic Field and Temperature Field in Medium-Frequency Induction Furnace Melting Process 被引量:2
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作者 YANG Dong ZHOU Jian-xin +2 位作者 WANG Hong LIAO Dun-ming PANG Sheng-yong 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2012年第S2期783-786,共4页
A mathematical model for describing the melting process in the medium-frequency induction furnace was developed.Finite difference method was applied to deal with coupling electromagnetic field and temperature field in... A mathematical model for describing the melting process in the medium-frequency induction furnace was developed.Finite difference method was applied to deal with coupling electromagnetic field and temperature field in the melting process.The magnetic induction,temperature distribution and the phase interface moving characteristic during melting of the furnace burden were calculated.The effects of the direct current and inductive heating frequency on the process were analyzed.The simulation results show that:In the direction of burden radius,magnetic induction decreases from the outside of the burden to the center.Solid/liquid interface moves gradually from the outside of the burden to the center.The movement speed increases when the burden begins to melt.In the direction of the burden height,the distribution of eddy current in the surface is accord with the edge effect of the coil.Solid/liquid interface moves gradually from the center to the two sides.The direct current has a greater effect on the electromagnetic field and temperature field than frequency. 展开更多
关键词 medium-frequency induction furnace electromagnetic field temperature field magnetic induction solid/liquid interface numerical simulation
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Corrosion Mechanism of Alumina-magnesia Dry Materials for Smelting Manganese/chromium Steel in Coreless Medium Frequency Induction Furnaces 被引量:1
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作者 LIU Chenchen HUANG Ao +3 位作者 NIE Jianhua GU Huazhi QIN Chuanjiang Lidah Mpoli NACHILIMA 《China's Refractories》 CAS 2023年第4期8-15,共8页
Alumina-magnesia dry materials are widely used in induction furnace linings, but they show different kinds of damage when melting different kinds of alloy steel. In this paper, the chemical composition, phase composit... Alumina-magnesia dry materials are widely used in induction furnace linings, but they show different kinds of damage when melting different kinds of alloy steel. In this paper, the chemical composition, phase composition, and microstructure of the post-use dry materials for the working liners melting different kinds of steel were evaluated. Furthermore, the corrosion mechanism of the steel on the furnace lining materials was comprehensively analyzed. The findings reveal a significant ability of the Mn element in the molten steel to diffuse and penetrate into the refractories. Mn oxidizes to form MnO at the steel-refractory interface, and then forms a liquid phase with Al_(2)O_(3). The Cr element is dissolved into corundum and spinel of the refractories, resulting in lattice defects and structural damage of the materials. TiO2reacts with Al_(2)O_(3) to form Al_(2)TiO_(5), which plays a crucial role in preventing crack formation and propagation. Part of Ti4+dissolves into magnesia-alumina(MA), densifying the materials. TiO2also slows down the reaction between the Cr element and refractory components, further improving the corrosion resistance of the materials. 展开更多
关键词 coreless medium frequency induction furnace manganese/chromium steel alumina-magnesia dry materials sintering layer corrosion mechanism
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Numerical analysis on Joule heating of double-loop channel induction furnaces 被引量:1
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作者 赵涛 周孑民 +1 位作者 熊家政 李勇 《Journal of Central South University》 SCIE EI CAS 2009年第5期851-856,共6页
In order to investigate Joule heating power,a three-dimensional finite element model(FEM) was developed to predict Joule heating power in the channels of double-loop inductor. The simulated results were compared with ... In order to investigate Joule heating power,a three-dimensional finite element model(FEM) was developed to predict Joule heating power in the channels of double-loop inductor. The simulated results were compared with experimental data from low load trials for a 400 kW inductor. The results,such as power factor and Joule heating power,show reasonable correlation with experimental data,and Joule heating rate reaches the maximum at the corners and the minimum at the centre of the cross-section area. With increasing relative permeability of iron core,length of coils,current frequency and resistivity of metal melt,the power factor and Joule heating power change. It is concluded that current frequency,the resistivity and length of the coil play a critical role in determining the power factor and Joule heating power,whereas relative permeability of the magnetic core shows no significant influence on them. 展开更多
关键词 numerical simulation channel induction furnace Joule heating power factor
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Improvement of the Structure and the Electromagnetic Characteristics of an Induction Ladle Furnace
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作者 Deng Kang Shen Min Ren Zhongming Jiang Guochang (School of Material Science and Engineering, Shanghai University) 《Advances in Manufacturing》 SCIE CAS 1999年第2期69-72,共4页
Based on a numerical analysis of the alternating electromagnetic field in the process of Steel refining with an induction ladle furnace (ILF), the optimization of the structure of ILF and the electromagnetic field for... Based on a numerical analysis of the alternating electromagnetic field in the process of Steel refining with an induction ladle furnace (ILF), the optimization of the structure of ILF and the electromagnetic field for melting is realized in the present work. The optimization of the ILF by outward extension of inner yokes can decrease the magnitic flux leakage obviously, reduce the eddy current energy loss dramatically and then, decrease the total power consumption. 展开更多
关键词 induction ladle furnace secondary refining electromagnetic metallurgy
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Melting Time Prediction Model for Induction Furnace Melting Using Specific Thermal Consumption from Material Charge Approach
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作者 Onigbajumo Adetunji Seidu Saliu Ojo +1 位作者 Akinlabi Oyetunji Newton Itua 《Journal of Minerals and Materials Characterization and Engineering》 2021年第1期61-74,共14页
A system-level evaluation was used to analyze the induction furnace operation and process system in this study. This paper presents an investigation into the relationship between the instantaneous chemical composition... A system-level evaluation was used to analyze the induction furnace operation and process system in this study. This paper presents an investigation into the relationship between the instantaneous chemical composition of a molten bath and its energy consumption in steelmaking. This was evaluated using numerical modelling to solve for the estimated melting time prediction for the induction furnace operation. This work provides an insight into the lowering of energy consumption and estimated production time in steelmaking using material charge balancing approach. Enthalpy computation was implemented to develop an energy consumption model for the molten metal using a specific charge composition approach. Computational simulation program engine (CastMELT) was also developed in Java programming language with a MySQL database server for seamless specific charge composition analysis and testing. The model performance was established using real-time production data from a cast iron-based foundry with a 1 and 2-ton induction furnace capacity and a medium carbon-based foundry with a 10- and 15-ton induction furnace capacity. Using parameter fitting techniques on the measured operational data of the induction furnaces at different periods of melting, the results from the model predictions and real-time melting showed good correlation between 81% - 95%. A further analysis that compared the relationship between the mass composition of a current molten bath and melting, time showed that energy consumption can be reduced with effective material balancing and controlled charge. Melting time was obtained as a function of the elemental charge composition of the molten bath in relation to the overall scrap material charge. This validates the approach taken by this research using material charge and thermodynamic of melting to optimize and better control melting operation in foundry and reduce traditional waste during iron and steel making. 展开更多
关键词 Charge Calculation Mass and Energy Balance Melting Time Optimization induction furnace Numerical Model Iron and Steelmaking CastMELT
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Features and control methods of the galvanneal furnace 被引量:1
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作者 WANG Lu TANG Xuexin 《Baosteel Technical Research》 CAS 2014年第1期47-51,共5页
The recent rapid developments in the automobile industry have demanded the extensive use of gaivannealed (GA) steel sheets.In particular,the development of lightweight automobiles is putting increasingly higher requ... The recent rapid developments in the automobile industry have demanded the extensive use of gaivannealed (GA) steel sheets.In particular,the development of lightweight automobiles is putting increasingly higher requirements on the strength of GA steel sheets.The galvanneal furnace,which is used for processing galvannealed steel sheets,is typically composed of the induction heating section,holding section and fog cooling section.This paper described the structural characteristics of each component of the galvanneal furnace,and analyzed temperature control methods of the galvanneal furnace that are important for the successful production of high-strength GA steel sheets for automotive applications. 展开更多
关键词 hot-dip galvanized galvanneal furnace induction heating fog cooling
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基于矿热炉多物理场耦合数值研究还原熔炼过程
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作者 李茂生 孙昊 +3 位作者 刘鹏 杜锦奇 张先珍 兰孝宇 《辽宁化工》 CAS 2024年第10期1567-1569,1573,共4页
建立了瞬态三维数学模型,分析了矿热炉冶炼过程中多物理场分布。该模型利用用户自定义函数(UDF)实现了电热转换、电磁感应和还原反应,对炉内电场、磁场、温度场和质量分数场进行模拟。结果表明:随着电极插入深度的增加,熔池最大温度逐... 建立了瞬态三维数学模型,分析了矿热炉冶炼过程中多物理场分布。该模型利用用户自定义函数(UDF)实现了电热转换、电磁感应和还原反应,对炉内电场、磁场、温度场和质量分数场进行模拟。结果表明:随着电极插入深度的增加,熔池最大温度逐渐升高;焦耳热随时间也不断增加,同电流一样在电弧内侧边缘出现明显的趋肤效应和邻近效应;氧化镍在电弧下方反应强烈,并向两侧逐渐减弱,随着电极插入深度的增加,电弧上方的反应反而变慢,综合考虑2.1 m为最佳电极插入深度。 展开更多
关键词 矿热炉 还原反应 电磁感应 数值模拟
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纺织品及附件铅释放量的测定
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作者 刘宇 赵海浪 林圣光 《针织工业》 北大核心 2024年第11期136-140,共5页
文章建立以人工睡液为萃取介质,测定纺织品及纺织品附件中铅释放量的试验方法,优化样品前处理条件和测试仪器参数。试验结果表明:采用电感耦合等离子体发射光谱法测定的定量限为0.02μg/(cm^(2)·h),在低、中、高3个加标浓度下的回... 文章建立以人工睡液为萃取介质,测定纺织品及纺织品附件中铅释放量的试验方法,优化样品前处理条件和测试仪器参数。试验结果表明:采用电感耦合等离子体发射光谱法测定的定量限为0.02μg/(cm^(2)·h),在低、中、高3个加标浓度下的回收率在93.26%~107.65%,相对标准偏差为1.03%~5.99%(n=7);采用石墨炉原子吸收光谱法测定的定量限为0.01μg/(cm^(2)·h),在低、中、高3个加标浓度下的回收率在82.65%~110.32%,相对标准偏差为1.08%~4.61%(n=7)。该方法前处理步骤简单,检测流程短,结果准确度高,适用于可放入婴幼儿和儿童口中的纺织品及其附件的检测。 展开更多
关键词 铅释放量 人工睡液 电感耦合等离子体发射光谱法 石墨炉原子吸收光谱法 纺织品检测
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基于TRNSYS的太阳能-电能互补采暖系统研究
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作者 李海俊 张天禹 +2 位作者 鞠丹阳 谢易澎 王俊 《农村电气化》 2024年第2期11-16,共6页
针对我国北方农村地区冬季采暖污染严重、碳排放量大等问题,文章以沈阳市某地区典型农村单体式住宅为研究对象,综合考虑太阳能、电能,提出2套清洁供暖方案。首先对太阳能集热器的集热倾角和面积的选择进行优化,然后选取沈阳市供暖季温... 针对我国北方农村地区冬季采暖污染严重、碳排放量大等问题,文章以沈阳市某地区典型农村单体式住宅为研究对象,综合考虑太阳能、电能,提出2套清洁供暖方案。首先对太阳能集热器的集热倾角和面积的选择进行优化,然后选取沈阳市供暖季温度较低的2天,根据天气情况分别作为晴天与阴天典型日,最后利用TRNSYS软件对供暖方案在典型日天气条件下模拟运行。结果表明在典型日天气条件下本研究提出的2种供暖方案均满足环保、室内温度适宜等采暖需求,且太阳能集热器+变频电磁采暖炉供暖方案更为节能。 展开更多
关键词 太阳能 集热效率 石墨烯电热膜 变频电磁采暖炉 TRNSYS
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感应熔炼炉炉衬损耗监测系统设计
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作者 戴财荣 张立广 +1 位作者 郭璐 宋聪聪 《微处理机》 2024年第1期49-52,共4页
为进一步消除炼钢和铸造行业中机械生产和加工设备的安全隐患,基于感应接触式炉衬损耗监测技术,设计一种炉衬损耗监测系统。该系统在感应熔炼炉运行过程中实时采集感应圈回路与中间金属层回路的电流值,根据两回路电流值判断感应熔炼炉... 为进一步消除炼钢和铸造行业中机械生产和加工设备的安全隐患,基于感应接触式炉衬损耗监测技术,设计一种炉衬损耗监测系统。该系统在感应熔炼炉运行过程中实时采集感应圈回路与中间金属层回路的电流值,根据两回路电流值判断感应熔炼炉是否出现炉衬损耗,评估损耗状况,并在回路电流值达到设定阈值后及时发出对应的信号提醒工作人员。经实验验证表明,系统能够提升炉衬损耗监测的可靠性,同时提高了熔炼炉生产的安全性以及工作人员对炉衬损耗状况判断的便利性。 展开更多
关键词 可编程控制器 感应熔炼炉 炉衬损耗监测 漏炉
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智能捞渣机器人在中频感应电炉中的应用
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作者 尉鸿江 曹玉亭 《现代铸铁》 CAS 2024年第5期7-9,共3页
介绍了感应电炉熔炼过程中传统的捞渣作业出现的工人劳动强度大、工作环境差及捞渣效率低等问题。通过采用智能捞渣机器人颠覆了传统的人工捞渣模式,经过实际生产验证,智能机器人捞渣模式产生了较好的应用效果:降低了操作人员的劳动强度... 介绍了感应电炉熔炼过程中传统的捞渣作业出现的工人劳动强度大、工作环境差及捞渣效率低等问题。通过采用智能捞渣机器人颠覆了传统的人工捞渣模式,经过实际生产验证,智能机器人捞渣模式产生了较好的应用效果:降低了操作人员的劳动强度,避免了人员操作过程中铁液的高温热辐射,改善了工人的作业环境,减少了铁液的损耗,降低了聚渣剂的使用量,相应的减少了烟尘的产生,有很大的经济社会效应。 展开更多
关键词 捞渣机器人 感应电炉 炉渣
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立式退火炉纠偏系统应用技术分析
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作者 汪红兵 皇甫少骏 《冶金动力》 2024年第4期82-84,共3页
介绍了冷轧后处理连续生产线炉内纠偏系统的种类、工作原理,并从抗干扰能力、工作环境和故障维修等方面分析了电感式纠偏系统与雷达式纠偏系统在退火炉中使用时的优缺点和技术差异。
关键词 炉内纠偏 电感式纠偏 雷达式纠偏
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铁液熔炼对球墨铸铁件质量的影响
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作者 高峰 《现代铸铁》 CAS 2024年第5期1-7,共7页
介绍了铁液熔炼过程中生铁、废钢的选用及炉料配比对铸件质量的影响,阐述了在熔炼过程中炉料配比、化学成分控制、熔炼时间、熔化温度、铁液化学成分和铁液均匀性等方面需要控制的要点及与熔炼相关易出现的质量问题,同时结合生产实际,... 介绍了铁液熔炼过程中生铁、废钢的选用及炉料配比对铸件质量的影响,阐述了在熔炼过程中炉料配比、化学成分控制、熔炼时间、熔化温度、铁液化学成分和铁液均匀性等方面需要控制的要点及与熔炼相关易出现的质量问题,同时结合生产实际,对高质量的球墨铸铁件生产需要注意的重要事项提出了相关的控制建议。最后指出:使用合适原材料是生产优质球墨铸铁件的前提,生产过程的稳定是生产优质球墨铸铁件的根本,熔炼过程的精准控制是提升和保证球墨铸铁件性能的关键。 展开更多
关键词 球墨铸铁 熔炼工艺 感应电炉熔炼
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真空感应悬浮熔炼技术在高纯材料制备中的应用
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作者 严建强 白志宇 +4 位作者 张志勇 史昆 何永亮 于雷 范顺昌 《铸造》 CAS 2024年第2期253-256,共4页
叙述了真空感应悬浮熔炼技术在制备高温、高纯等合金材料方面的优点,介绍了真空感应悬浮炉的关键技术以及装备的最新发展与应用,讨论了该技术在熔炼高质量特种钢等新材料方面的应用,并分析了该技术在熔炼其他材料等领域的应用及可行性。
关键词 感应电源 真空悬浮熔炼炉 特种钢 高熵合金
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多重化逆变电源在有心感应电炉的应用
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作者 王兵 《工业加热》 CAS 2024年第5期72-74,84,共4页
传统有心感应电炉的供电由感应器、平衡电抗、电容平衡电路组成,一般采用调压器分档接触器控制感应器电压,调节感应器的功率。接触器切换电压挡位,造成感应器熔沟巨大的电流冲击,是影响感应器的稳定运行及寿命主要因素。本电源装置是基... 传统有心感应电炉的供电由感应器、平衡电抗、电容平衡电路组成,一般采用调压器分档接触器控制感应器电压,调节感应器的功率。接触器切换电压挡位,造成感应器熔沟巨大的电流冲击,是影响感应器的稳定运行及寿命主要因素。本电源装置是基于双DSP+双FPGA+CPLD核心控制器的控制装置,主要由主电路部分、控制部分组成。主电路部分主要包括:空开、主接触器、软启动限流电阻和辅助接触器、滤波器和功率单元体构成的换流链。控制部分通过对电网电压电流、负载电流、补偿电流进行控制,最终实现功率控制的目的:直流侧电压动态均压策略;较高开关频率下的功率器件驱动和散热设计;滤波器的设计和应用。基于低压器件H桥级联实现高压功能的硬件设计应用。探索一种新的供电方案,保障供电安全,降低能耗,营造“绿色电网”具有十分重要的现实意义。 展开更多
关键词 感应电炉 变频电源 逆变 节能 效率
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VIM真空感应炉真空度修复分析
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作者 张龙 《山西冶金》 CAS 2024年第5期218-220,共3页
以太钢技术中心基础研究所的德国ALD真空感应炉作为研究对象,其连续服役十余年,大量的冶炼试验对真空炉的抽真空系统造成了严重的影响,工作真空度不断降低,导致钢锭质量下降。通过分析真空炉抽真空泵级系统原理,提出将真空泵级系统进行... 以太钢技术中心基础研究所的德国ALD真空感应炉作为研究对象,其连续服役十余年,大量的冶炼试验对真空炉的抽真空系统造成了严重的影响,工作真空度不断降低,导致钢锭质量下降。通过分析真空炉抽真空泵级系统原理,提出将真空泵级系统进行拆解维护修复方案。经过实践证明,该修复方案切实可行,能够大幅度提高真空感应炉的工作真空度。 展开更多
关键词 真空感应炉(VIM炉) 真空度 增压泵 真空泵
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双碳背景下中频电炉熔炼铸铁的减碳实践
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作者 杨涛 刘晓东 曹月山 《现代铸铁》 CAS 2024年第5期13-16,21,共5页
验证分析了中频电炉熔炼铸铁用炉料的种类及尺寸规格选择,炉衬材料及筑炉、烘炉工艺对耗电的影响。最后指出:(1)采用多规格尺寸炉料搭配,可实现炉料的最优堆积密度,缩短加料操作时间,减少炉料对炉衬的机械冲击,提高熔化效率;(2)采用洁... 验证分析了中频电炉熔炼铸铁用炉料的种类及尺寸规格选择,炉衬材料及筑炉、烘炉工艺对耗电的影响。最后指出:(1)采用多规格尺寸炉料搭配,可实现炉料的最优堆积密度,缩短加料操作时间,减少炉料对炉衬的机械冲击,提高熔化效率;(2)采用洁净回炉料,可降低熔渣量,延长炉衬寿命,降低劳动强度;(3)合理的选择炉衬材料,实现最紧实堆积,与炉衬材料匹配的烘炉工艺,获得合理的炉衬烧结结构,提高炉衬寿命;(4)合理选择优质添加剂,可有效降低铸件不良品率1%以上,且铸件质量更稳定。综合采取上述措施,可达到每吨铁液降低能耗5.7%的效果,实现节能减碳。 展开更多
关键词 中频电炉 铸铁熔炼 洁净炉料 节能减碳
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变频感应加热炉电网频率波动下低压智能断路器过流保护控制
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作者 吴达雷 陈育培 王丕适 《工业加热》 CAS 2024年第7期70-75,共6页
电网频率波动会导致电流波形在短时间内发生变化,从而影响过流保护控制的响应速度。为了保障电网频率波动下低压智能断路器过流保护控制的稳定可靠性,提高变频感应加热炉电力系统的保护性能,提出变频感应加热炉电网频率波动下低压智能... 电网频率波动会导致电流波形在短时间内发生变化,从而影响过流保护控制的响应速度。为了保障电网频率波动下低压智能断路器过流保护控制的稳定可靠性,提高变频感应加热炉电力系统的保护性能,提出变频感应加热炉电网频率波动下低压智能断路器过流保护控制方法。利用PCL-818L数据采集卡,采集变频感应加热炉供电系统中的电压电流信号;通过强化学习Q-Learning算法,消除信号中的电网频率波动,提高断路器的稳定性;采用引入滑动时间窗口的三段电流保护方法,实现低压智能断路器的过流保护控制。实验结果表明,所提方法能够在有效消除电网频率波动干扰的情况下,提高断路器过流保护控制精度、效率以及稳定性。 展开更多
关键词 变频感应加热炉 电网频率波动 数据采集卡 Q-Learning算法 过流保护控制
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ICP-MS法和GF-AAS法检测乳粉中铬元素的测量系统评价
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作者 冯灏 苏莹 +3 位作者 耿雅雯 郭青青 林津 周陶鸿 《乳业科学与技术》 2024年第1期19-25,共7页
铬元素是食品质量安全重点监测项目,GB 5009.123—2023《食品安全国家标准食品中铬的测定》中规定了食品中铬的2种常用检验方法:石墨炉原子吸收光谱(graphite furnace atomic absorption spectrometry,GF-AAS)法和电感耦合等离子体质谱(... 铬元素是食品质量安全重点监测项目,GB 5009.123—2023《食品安全国家标准食品中铬的测定》中规定了食品中铬的2种常用检验方法:石墨炉原子吸收光谱(graphite furnace atomic absorption spectrometry,GF-AAS)法和电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)法。使用Minitab统计分析工具,运用控制图法、独立样件法、t检验法及方差分析法对上述2种常用检验方法测量系统的稳定性、偏倚、线性、重复性与再现性进行分析。结果表明:2种检测方法测量系统极差图和均值图均无异常点,组内误差处于统计受控状态,稳定性良好;量具线性和偏倚分析结果均不存在显著偏倚和显著线性误差;量具R&R报告分析结果表明,ICP-MS法和GF-AAS法测量系统重复性和再现性良好;双因子方差分析表明,样品是唯一显著影响测量误差的因子;研究变异分析表明,测量系统误差可以接受。ICP-MS法和GF-AAS法不仅能有效保障乳粉中铬元素含量检测数据的可靠性和可重复性,为实验室进行测量系统的误差分析与控制提供科学依据,同时也为乳制品中其他重金属检测及其他食品中重金属检测的测量系统评价提供一定参考。 展开更多
关键词 电感耦合等离子体质谱 石墨炉原子吸收光谱 乳粉 Minitab 测量系统
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