高炉沟铁和渣铁综合利用技术分析

论述昆钢高炉沟铁、渣铁的产生原因、利用现状、渣处理工艺及管理流程。根据高炉沟铁、渣铁尾渣的再选试验结果,提出了高炉沟铁、渣铁综合利用的方法。     

陕钢龙钢公司高炉渣铁沟智能测温喜获成功

<正>近日,陕钢龙钢公司高炉渣铁沟智能测温检测系统成功投入使用,实现了24小时内实时监测渣铁沟运转状况。高炉渣铁沟是高炉出铁时高温铁水和熔渣的重要流动通道,对高炉长稳运行起着至关重要的作用。龙钢公司高炉渣铁沟由于受高温铁水长期冲刷影响,渣铁沟容易出现耐火材料变薄、底部温度升高等现象。传统方式是人工采用测温枪检测渣铁沟底部温度变化和观察大沟两侧冲刷来进行周期性维护,容易出现人为检查不到位,造成渣铁沟沟底烧穿等高炉休风事故,为解决以上问题,设备技术人员经研究分析,决定对渣铁沟实施实时温度连续监测改造,通过在铁沟底部及两侧多点位置铺设热     

武钢高炉炉前渣铁沟及英巴沟嘴改造

介绍武钢炼铁厂对高炉炉前渣铁沟、英巴渣沟嘴以及残铁沟嘴等进行的技术改造攻关。从原来比较落后的人工敷设修筑沟嘴法,逐步完善为采用先进的预制件结构沟嘴,降低了工人的劳动强度,改善了作业环境,降低了人工及材料成本,提高了高炉生产效率。     

承钢高炉铁沟沉积物的形成机理研究

针对承钢高炉铁沟粘结严重现象,对铁沟沉积物的形成机理进行了研究.结果表明:形成铁沟沉积物的主要原因是由于钒钛高炉渣的流动性能差,渣中铁滴析出TiC、Ti(C,N)和出铁过程降温综合作用的结果.改善高炉终渣的粘度-温度性能,提高渣、铁分离能力是防治产生铁沟沉积物的有效措施.     

一种高炉出铁场除尘用渣铁沟密封机构

正专利号:ZL200920049454.2专利权人:上海梅山钢铁股份有限公司发明(设计)人:卢亮戎吉居鸣陈昌松本实用新型涉及高炉渣铁沟密封罩,特别涉及一种非平坦高炉出铁场除尘用渣铁沟密封机构。主要解决现有密封机构无法实现铁沟和渣沟沟盖的密封的技术问题。本实用新型的技术方案为:一种高炉出铁场除尘用渣铁沟密封机构,在渣铁沟上安置一个拱形密封罩,在渣铁沟两侧设置     

从水渣沟内回收小颗粒锰铁

为了降低生产成本,提高经济效益,从1988年6月份起,我厂开始从水渣沟内回收小颗粒锰铁,不但使水渣中含锰量减少了将近一半,而且在短时间内获得了可观的经济效益.(1)其做法是;用钢板、圆铁及角钢在冲渣沟内层层设“坎”。一般10m 左右设一个“坎”。每个“坎”需用δ=5mm 的钢板0.1m~2,φ10—16mm 圆铁1m,小号角钢3m.将钢板割成每块0.1m~2左右(长较冲渣沟宽略小1～2cm,宽约为20cm);圆铁弯成(?)形(开口约为10～15cm)焊在钢板上,做成挡饭;选好设“坎”的位置,将角钢割成长0.75m一根,每两根一组,间隔约2～3cm,沿冲渣沟两壁固定(冲渣沟底     

1号高炉铁渣沟改造

本文详细介绍了宝钢１号炉投产以后渣铁沟损坏的情况，以及对生产，材料消耗等带来的影响。通过对渣铁沟损坏原因的分析，提出改造措施，并说明了对渣铁沟改造后所产生的效益。     

高炉新配方沟料的研制

随着高炉的大型化、采用高压及高风温操作,出铁量增加,铁水温度升高,加剧了渣及铁对铁沟的侵蚀和冲刷,缩短了出铁沟使用寿命,增加了耐火材料消耗。为提高铁沟的使用寿命,研制了含高铝骨料,碳化硅及粘土新沟泥。实践证明,此种泥料的高温机械性能,热稳定性,抗渣性及抗铁的冲刷能力均有提高。在材质改进的同时,进一步     

鞍钢新一号高炉出铁场设置

高炉大型化对出铁场设计提出更高要求.文章介绍了鞍钢新一号高炉出铁场布置、设施及渣铁沟沟衬耐火材料应用技术,对同类型高炉有借鉴作用.     

2500m~3钒钛矿冶炼高炉贮铁式主沟改造研究

针对钒钛矿冶炼高炉产量提高后,高炉主沟侵蚀速度加快,渣铁分离不充分,造成渣中带铁高的问题,通过对炉前贮铁式主沟进行优化改造,延长高炉炉前贮铁式主沟的寿命,降低渣中带铁,为生产稳定提供保障。     

关于铁精粉中是否含有铁屑的检测

通过对铁精粉的外观、制样等情况判断几种铁精粉中含铁屑的检测方法.     

梅山铁矿尾矿浮选铁的试验研究

梅山铁矿尾矿组成复杂,脉石矿物的物理性质与铁矿物相近,分选困难。采用强磁选脱泥,脱泥精矿正浮选,以甲苯胂酸作铁矿物捕收剂,六偏磷酸钠作脉石矿物抑制剂,煤油为辅助捕收剂,通过一粗二精一扫流程,得到铁品位63.47%的合格铁精矿,回收率为24.04%。     

原料生铁与铸件组织遗传性研究

研究了４ 种不同产地的常用原料生铁的原始组织、相同过热温度下原料生铁与铸铁（ＨＴ２００）的组织和力学性能。结果表明,原料生铁中粗大石墨结及石墨片的大小和分布在低于１ ４５０ ℃的熔炼条件下,具有明显的遗传效应。由于原料组织的遗传效应造成铸件的抗拉强度相差近２０ ％ 。     

从江西某铁矿尾矿中回收铁精矿

江西某铁矿主要金属矿物为褐铁矿,矿石含泥含水且可选性差,采用磁化还原焙烧法可改善矿石的分选性.结果表明,在950～1 000℃、褐煤用量15%～20%条件下焙烧2 h,焙砂在87.55 kA/m磁场强度下进行磁选,铁精矿产率51.46%,全铁回收率78.88%,效果较好.     

Iron supplementation

BACKGROUND: Besides decentration of the graft/host trephination and "horizontal torsion" "vertical tilt" is an important factor for reduced visual outcome after penetrating keratoplasty (PK). The purpose of this study was to evaluate the time course of vertical tilt in absolute value and direction and to correlate it with functional results after PK. PATIENTS AND METHODS: Fifty patients each (20 primary dystrophies, 30 keratoconus) underwent nonmechanical trephination (NMT) (excimer laser MEL60, Aesculap-Meditec, Heroldsberg, Germany) or mechanical motor trephination (MT) (Geuder, Heidelberg, Germany) in penetrating keratoplasty. All procedures (7.5 mm in dystrophies, 8.0 mm in keratoconus, 8 orientation teeth in NMT, double-running 10-0 nylon suture) were performed by one surgeon (GOHN). At a postoperative gate of 6 weeks, 6 months, before partial suture removal and after complete suture removal, corneal topography analysis (TMS-1, Tomey, Tennenlohe, Germany) was performed. After a Gram-Schmidt-orthogonalization corneal topography height data of 25 noncentric rings in 256 hemimeridians were decomposed into Zernike components of radial order n = 16 in the sense of minimizing the root mean square error. The tilt of the surface relative to the videokeratoscope axis was calculated from the Zernike components Z1(1) and Z1(-1). The meridional power at the cardinal meridians was derived from all parabolic Zernike terms. Tilt and the difference between both meridians of the Zernike representation (ZA) were correlated with the results of Zeiss keratometry (KA). Simulated Keratometry (SimK) of the TMS-1, subjective refraction (RZ) and best-corrected visual acuity. RESULTS: After NMT, vertical tilt of the graft was 3 degrees without significant change over time. Following MT, an equivalent time course could be observed before partial suture removal. However, after complete suture removal, a significant increase of the tilt was measured to 5 degrees (p = 0.02). No significant difference could be detected comparing keratoconus and Fuchs' dystrophy both in NMT and MT. The direction of the vertical tilt component piled up to the hemimeridian defined by the knot of the first running suture. At all postoperative follow-up examinations, the ZA of the Zernike decomposition showed a good correlation to the RZ, whereas the KA and the SimK did not. At the end of the follow-up, best-corrected visual acuity after NMT was 2 decimal lines better than after MT. CONCLUSIONS: The Zernike decomposition of topographic height data is a suitable tool for extraction and quantifying vertical tilt of the graft following penetrating keratoplasty. In contrast to conventional keratometry with its 4-point measurement, a decomposition of topographic height data into orthogonal polynomials enables a detection of both cardinal meridians even in corneas with a high degree of local irregularities.     

白云鄂博矿选铁尾矿中铁矿物的工艺矿物特征

白云鄂博矿矿区矿产资源丰富,氧化矿尾矿即将作为主要生产原料应用于白云鄂博矿综合利用示范基地生产线。文章以实验室氧化矿尾矿与磁铁矿尾矿为试验试样,根据粒度划分为5个不同粒级,旨在测定显微镜下上述尾矿的化学成分和粒度分布,同时深入研究其铁矿物的矿物组成和解离特性,从而为选铁工艺的优化提供必要的理论依据与技术支持。     

铁饱和条件下铁与Fe2O3间的固相反应

采用扩散偶的方法,对铁与Fe₂O₃间的固相反应进行了研究,结果表明,两者间的产物层主要在Fe₂O₃一侧形成,而且与铁在空气中氧化不同,呈现出混合状结构;在铁饱和的条件下,Fe₂O₃转化的最终产物是Fe_xO(x<1)。     

Recovery of Ultra-Fine Iron Ore from Iron Ore Tailings

Many attempts has been taken for further utilisation of the tailings and slimes through different routes i.e. beneficiation, agglomeration etc. Though the slimes and tailings contain huge ultra fines, conventional beneficiation methods many not be much effective for handling because of particle size limitations. Physicochemical method i.e. selective flocculation is a process for handling the ultrafine particles present in the tailings. Review shows that selective flocculation technique have very limited commercial application. Here the study focuses on the application of selective flocculation process for beneficiation of synthetic mixtures of iron ore and kaolinite as well as iron ore tailings. Results show that it is possible to achieve 65.78(%) of Fe, with 2.65% Al₂O₃, 3.66 SiO₂ (%) in the concentrate using synthetic mixture feed and more than 60% of Fe is obtained from natural iron ore tailings.     

高铁硫化矿选择性浸出铁的研究

将镍钴火法冶炼转炉渣进行还原硫化,制备成富含镍钴铜的高含铁硫化矿,并采用加压选择性浸出其中的铁。对铁的浸出行为进行了研究。结果表明,随着铜浸出率从98%降到-42%,铁浸出率从3%升到43%左右,选择性浸出后液含铁越来越高,而且以二价铁居多,这是造成高铁硫化矿难以进行加压选浸的主要原因。