静置对A356.2铝液化学成分、力学性能及显微组织的影响

本试验中对比了静置炉与塔式熔炼炉对A356.2铝合金液质量的影响,探究了获得高质量铝液的最佳静置处理时间。结果表明,经过静置处理后,与塔式熔炼炉内铝液相比,静置炉内各位置铝液成分更加均匀,温度分层现象得以改善,试棒伸长率相对于塔式熔炼炉内铝液试棒提升了12%。最佳静置时间确定为40 min,铝液静置40 min后,铝液化学成分均匀,元素烧损量小;温度分布均匀,铝液顶层与底层之间温差稳定在15~20℃度内,试棒力学性能最优,晶粒细化效果好,变质完全。     

ABB公司的电磁搅拌装置进展

电磁搅拌(EMS)技术在铝熔炼炉和静置炉的铝水搅拌中的应用已是成熟和成功的技术,本文概述了ABB公司自动化系统对提高劳动生产率和节省成本的贡献。 自从1968年ABB公司向美国凯撒铝和化学公司提供第一台铝熔炼炉的电磁搅拌装置以来,目前在全世界已有100多台铝熔炼炉电磁搅拌装置在全世界运行,电磁搅拌装置明     

铝熔炼炉的新型耐火材料

一、前言铝及铝合金的熔炼及静置炉(以下简称熔炼炉)正在谋求高效率化及熔体质量优质化,相应地对熔炼炉用耐火材料质量的要求也更加严格。要想提高耐火材料的质量,就必须分析     

最新的铝熔炼静置炉

一、前言日本布拉依布里考公司于76年从美国F·W斜发公司铝炉厂引进了铝的熔炼静置炉,1号炉于78年建成。这台熔炼静置炉经过反复试验后于79年2月以名为布拉依安福开始销售。 F·W斜发公司根据铸造业的要求,而研制能满足以下三个条件的铝熔炼炉,条件是熔炼成本低、可获得高质量的铝熔体和不     

斯特纳铝业公司万能旋转废铝圆形熔炼炉投产

据奥地利赫特威希工程公司（Hertwich Engineering GmbH），该公司向丹麦科尔汀市斯特纳铝业公司（Stena Aluminium）提供的一台URTF14型万能旋转废铝圆形熔炼炉已于早些时候顺利投产，这是该公司向斯特纳铝业公司提供的第三台这类废铝熔炼炉。这台新投产的旋转炉的容积为14m^3,主要用于熔炼污染的废铝，它的附属设备有：皮带输送机、装料机、振动装置（vibratiry feeders），还有一对26t的静置炉。     

奥地利开发铝回收新技术

奥地利Linde AG和Hertwich工程有限公司及Corus铝业公司合作开发出新一代二次铝提炼的旋转倾斜熔炼炉,简称URTF。第一个新炉的用户是欧洲主要的铝回收公司—瑞典Stena铝业有限公司。这种万能旋转倾斜式焙炼炉取得了很大成功。第二台熔炼炉已于2002年8月投产,每台     

铝液搅拌车扒渣板的改进

在铝电解或铝加工行业,一般都需要在熔炼炉、混合炉内对铝液进行熔炼或精炼处理。向铝液中加入精炼剂或除渣剂后,均需要用一种工具或设备对炉内铝液进行搅拌,搅拌后的铝液经过15-20分钟的静置,还需将铝液表面的金属或非金属氧化渣扒出,以达到净化熔体、均匀铝液化学成分、调节铝液温度的目的。     

高铝水泥在铝熔炼工频炉上的应用

铝熔炼炉炉龄的长短,主要取决于炉衬材料的性质和捣固烧结是否完善。人用工频炉熔炼铝合金的工艺特点及对炉衬材料的性能要求着手,试验采用高铝水泥打结炉衬,其炉子寿命可达80－120炉次,设备维修率低,经济效益好。     

铝液搅拌车扒渣板的改进

在铝电解或铅加工行业,一般都需要在熔炼炉、混合炉内对铝液进行熔炼或精炼处理.向铝液中加入精炼剂或除渣剂后,均需要用一种工具或设备对炉内铝液进行搅拌,搅拌后的铝液经过15～20分钟的静置,还需将铝液表面的金属或非金属氧化渣扒出,以达到净化熔体、均匀铝液化学成分、调节铝液温度的目的.     

应重视新型坩埚炉熔炼铝技术的研究

再生铝熔炼技术经过多年的发展,已经从小型的坩埚熔炼发展到今天的大型反射炉熔炼,目前国内最大的熔炼铝反射炉已经达到5 0吨以上,而且炉型也趋于多样化,并且正在向自动化方向发展.但是,在现代化的熔炼炉飞速发展的时代,我们应该看到我国众多的小型再生铝厂仍然使用原始的坩埚炉熔炼铝合金,因此,对坩埚炉熔炼铝技术进行研究是非常必要的.     

A study on the preparation of iron aluminium based intermetallic alloy by aluminothermic smelting technique

Iron aluminium based intermetallic alloys or iron aluminide alloys are usually made by conventional melting and powder processing routes. Melting is carried out either in vacuum induction melting or arc melting furnaces. However,the use of high vacuum and high temperature expensive furnaces, high cost associated with the procurement of pure individual metal components, operational problems during melting stages are some of the most deterrent factors in making these alloys by melting route. Powder processing route utilises atomised, carbonyl or rapidly solidified pre alloyed powders as starting materials and alloying is carried out either by mechanical alloying or reaction synthesis or by consolidation through hot isostatic pressing. This process also involves many processing steps and considerable expense. In the present investigation, it has been found possible to eliminate the above problems by adopting a simple aluminothermic reduction (thermit) smelting technique for the preparation of iron aluminide alloy of targetted composition Fe–16Al–5.46Cr–0.5V–0.05C (wt %) by the direct co-reduction of oxides of iron,chromium and vanadium in presence of carbon and excess aluminium. Incorporation of slag fluidizer CaO amounting to 10 wt % of total charge, aluminium, 10 wt % excess over stoichiometric requirement and carbon, double the theoretical amount have been found to be adequate to form the above alloy with maximum overall yield of 99.4 wt %. The compositional variation of alloying components like iron, chromium,vanadium, aluminium and carbon in the aluminothermically produced iron aluminide alloy from the target composition have been minimized under optimum experimental conditions. The reactions have been found to be well controlled, rapid and self-sustaining and are conducted in an off-furnace manner using a simple experimental set-up.Studies on composition and microstructure characterization, hot rolling behaviour and oxidation resistance of the said alloy points towards its suitability for use.     

淬火铝合金板材时效炉炉型选择分析

淬火铝合金板材时效炉对温度均匀性控制要求很高，对当前铝合金板材的效炉炉型进行了比较分析。阐述了如何选择合金板材时效炉。     

Electric Metal Melting—a Review

This paper presents a detailed review of the present status of electric melting with particular reference to the needs of the cast metals sector. The survey covers the use of arc-furnaces; coreless induction furnaces; channel induction furnaces, and electric-resistance units. In the case of arc and induction furnaces, applications are shown to embrace the melting of iron and steel, while induction furnaces also find use in the production of castings in non-ferrous metals. Resistance-type units are now finding widespread adoption in the melting and holding of light alloys.     

我国铝加工业冶金炉能耗现状与展望（1）

全面系统地调查了中国铝加工行业冶金炉及其能源消耗情况,提出了节能降耗的途径与具体措施。截止１９９８年底,中国大陆铝加工行业约有１２６００台各类冶金炉,这些炉的单位产品能耗约为工业发达国家的２．２倍。调整与完善行业结构、提高装备水平与加强管理是节能降耗的途径。     

The toroidal oxy-fuel burner

The growing need for a means of rapidly melting scrap in steelmaking practice is briefly discussed. The Shell Toroidal burner designed for melting such cold charges is described, and its application to open-hearth furnaces and Fuel-Oxygen-Scrap (FOS) furnaces is discussed.     

熔铝用无芯工频感应炉炉衬寿命的探讨

石英砂固有良好的热稳定性,较高的机械性能,较小的热膨胀系数,价格低廉等优点,被广泛用做中小型感应炉的炉守材料,从工频炉熔炼铝合金的工艺特点及对材料性能要求着手,分析了石英砂颗粒配比,打结,烧结对炉衬寿命的影响,用于生产,取得了较满意的效果。     

烧嘴对蓄热式铝熔炼炉熔炼过程的影晌

结合蓄热式铝熔炼炉熔炼过程的特点,运用FLUENTUDF和FLUENTScheme混合编程,耦合用户自定义熔化模型和燃烧器换向及燃烧量变化模型,实现了蓄热式铝熔炼炉熔炼过程的数值模拟。依据优化原则,获得了熔炼时间随影响因子的变化规律：熔炼时间随着旋流数、燃烧器倾角、空气预热温度或天然气流量的增加而缩短;熔炼时间随着燃烧器间水平夹角或空燃比的延长,先减小而后增加：熔炼时间随着燃烧器高度的增加而延长。     

挤压铝棒坯燃油加热炉的结构和节能效果

随着技术的进步,燃油加热炉已完全能满足挤压铝棒坯的加热要求,本文对铝棒坯油加热 几种结构型式,燃烧装置,炉衬材料,烟道口和火道口的设备及温度控制系统等作了简要介绍和比较,可供设备和选炉型时参考。     

Lead smelting in a submerged arc furnace

Lead is still principally produced in shaft and flame-fired furnaces. However, electric furnaces increase metal recovery, reduce environmental burdens and decrease energy consumption compared to conventional processes. Because lead has low melting and boiling points and aggressive slags, the design of the furnace, energy input, and slag conductivity and composition are very important. Secondary materials are easily handled in electric furnaces. Since additional amounts of lead will become available from secondary sources in the future, electric furnaces are expected to replace conventional smelting furnaces.     

Melting Behavior of Titanium-Bearing Electric Furnace Slag for Effective Smelting of Vanadium Titanomagnetite

JOM - The melting behavior of titanium-bearing electric furnace slag is a key factor for effective smelting of vanadium titanomagnetite in electric furnaces. The melting behavior of synthetically...