提高烧结机有效烧结面积的生产实践

鞍钢股份有限公司炼铁总厂新烧作业区通过采取改造烧结机密封盖板、增加风箱等措施,降低了烧结机漏风率,单台烧结机有效面积增加了4.2 m2,烧结机台时产量提高了11.3 t/h,固体燃耗降低了3 kg/t,烧结年创经济效益1 000余万元,满足了高炉生产需要。     

小球烧结在环型烧结机上的应用

小球、外加煤烧结是以稳定生产操作、强化制粒为核心的烧结技术。它尤其适用于细精矿粉的烧结。山东泰山钢铁总公司采用该项技术后，在精矿粉率７２％时，烧结机利用系数最高达到２．１０ｔ／ｍ＾２．ｈ，平均单耗标准煤降低７．６７ｋｇ／ｔ，综合合格率提高了２１％，年经济效益达２５０万元。     

通钢应用小球烧结技术的改造及效果

通钢烧结厂通过实施小球烧结工艺改造,包括:生石灰配消系统改造;延长混料时间、提高混料筒倾角;在一混和二混之间增设制粒机;制粒机加水管改造;矿槽、漏斗加尼龙衬板、防止粘料;实施燃料分加;小矿槽通蒸汽预热混合料和应用多辊布料等,使烧结机利用系数由1.641 t/(m2·h)提高到1.983 t/(m2·h),同时能耗降低,烧结矿质量改善,取得了显著的经济效益.     

Pressureless Spark Plasma Sintering: A Perspective from Conventional Sintering to Accelerated Sintering Without Pressure

Powder Metallurgy and Metal Ceramics - Spark plasma sintering (SPS) has been an attractive technique for many researchers seeking to consolidate metals and ceramics. This technique’s high...     

Analysis of Vanadium-Bearing Titanomagnetite Sintering Process by Dissection of Sintering Bed

 Many problems appear in the sintering process of vanadium bearing titanomagnetite, such as high energy consumption and low productivity; sinter quality is also very poor for its low tumble strength and high reduction degradation. Sinter productivity and quality are dominated by bed permeability and mineralogy structure, which are highly influenced by the thermal state of sintering bed, so the sintering process of titanomagnetite is researched by bed dissection in this work. Temperature evolution curves of sinter materials were measured, and the results show that melting duration, peak temperature duration and sintering temperature of different layers differ greatly from each other; flame front speed and vertical sintering speed of bed lower region are much smaller than those of bed upper region. Simultaneously, sinter samples were collected from different layers, and their mineralogy characteristics are analyzed; sinters from bed lower region have poor mineralogy structure, and the amounts of perovskite and dicalcium silicate increase intensively, which are bad for sinter strength and reduction degradation property. Measures are proposed to improve the quality and productivity of titanomagnetite sinter.     

加压烧结在宝钢3号烧结机的实践

阐述了加压烧结的理论基础,介绍了加压烧结在宝钢３号烧结机应用的工艺及其效果。     

新疆菱铁矿烧结试验研究

通过对新疆菱铁矿的烧结试验研究得出：新疆菱铁矿铁品位较低,CaO质量分数超高,达到7.87%,SiO2质量分数很低,只有0.79%。因此以新疆菱铁矿为主要原料进行烧结,为达到高炉生产所需要的碱度,就需配加适量的硅石或含SiO2较高的矿粉。烧结矿燃料配比为5.2%~5.6%,转鼓指数可达到56%～57%,可用于中、小高炉冶炼。     

铁矿粉烧结优化配矿的试验

 基于微型烧结试验,测定、比较和分析了国内某钢厂烧结生产常用6种铁矿粉的同化性和液相流动性等高温特性及其影响因素,进而根据其高温特性提出相应互补优化配合原则,设计了4组烧结优化配矿方案并进行了烧结杯试验。结果显示,优化配矿方案的烧结矿产量、质量指标均比基准方案优良,烧结成本比基准方案低,这表明基于铁矿粉同化性和液相流动性对所研究的6种铁矿粉能够进行有效的优化配矿,也为该钢厂烧结优化配矿提供了理论依据和技术支持。     

适应超厚料层烧结的设备改造

在钢材市场持续疲软的情况下,为了适应烧结生产的低成本运行,对1号烧结机进行了适应厚料层烧结的设备改造,取得了很好的效果。     

Application of Skorokhod’s Rheological Theory of Sintering to Analyze the Sintering Kinetics of Tungsten Powders

Powder Metallurgy and Metal Ceramics - Valerii Skorokhod’s published papers focusing on experimental and theoretical studies of fine powder sintering are analyzed. The application of...     

Sintering of copper-tungsten materials

Conclusions To protect the Cu matrix of copper-tungsten compacts against hydrogen sickness, the starting compact porosity should be kept close to 20%. Resintering is accompanied by an increase in specimen volume, which grows with rise in tungsten content. The increase in volume is brought about by reduction-oxidation processes. No reaction has been observed between the metallic components of the system.Translated from Poroshkovaya Metallurgiya, No. 5(269), pp. 27–29, May, 1985.     

烧结过程的优化控制系统

IRM集团开发了两套装置来控制烧结过程的添加水量和固体燃料量。PERMEAMETER系统连续测量烧结混合料的透气性,并通过适当调节加水量来保持混合料的透气性在理想范围内。PERMEAMETER可以防止水量过多而带来的床层堵塞问题,并且可以稳定烧透点的位置改善烧结线产率。PERMAGNAG系统连续测量烧结矿磁性特征。使用PERMAGNAG系统可以通过调节燃料配比来修正对烧结质量的自然干扰,其优点是减少固体燃料用量的同时提高烧结矿质量。     

当代大型烧结技术的进步

 大型烧结机作为国内外烧结技术的主流发展方向,具有烧结矿质量好、能耗低、劳动生产率和自动化水平高诸多优势,为顺应烧结技术发展,新世纪国内钢企掀起新建大型烧结机热潮;同时,伴随优质铁矿资源的减少,在铁矿粉烧结理论方面取得显著进步。新建大型烧结机以先进理念为指导,研发应用满足大型烧结机的综合操作技术,实现烧结工艺流程集约化,生产运行稳定,取得先进的技术指标。加强烧结生产节能减排,减少污染,实现综合技术经济指标和技术水平的整体提升。     

莱钢烧结机头尾密封装置的改造

分析了烧结机机头、机尾杠杆式密封装置存在的缺陷,介绍了自调式柔性密封的结构和特点 .莱钢烧结厂采用新型密封装置后,效果明显,漏风率显著降低,利用系数提高,获得了良好的经济效益.     

烧结机侧密封技术在酒钢公司选烧厂的应用

酒钢选烧厂两台130 m~2烧结机利用设备维修的机会将滑道干油密封改为高分子柔性侧密封,取得令人满意的效果,烧结技术指标改善,烧结机系统漏风率降低17%左右,电单耗下降了2.17 kWh/t,双机每年可创经济效益500万元以上。