改善重钢烧结矿粒度组成途径的研究

在实验室对烧结矿的ＦｅＯ，ＭｇＯ，Ａｌ２Ｏ３含量和碱度Ｂ（ＣａＯ／ＳｉＯ２）４个因素对烧结矿粒度组成等冶金性能的影响进行了系统的试验研究，提出了改善重钢烧结矿粒度的组成的途径。     

白云石改善烧结矿性能的研究

通过白云石改善烧结矿性能的研究，说明配加一定白云石能防止烧结矿粉化，提高烧结可强度，改善其冶金性能。防止烧结矿粉化的原因是白云石中的ＭｇＯ能阻止烧结矿中矿物相变。     

改善低硅烧结矿冶金性能的研究及实践

为了改善低硅烧结矿的冶金性能，作者从烧结矿的显微结构和矿物组成出发，研究了SiO2含量与烧结矿低温还原粉化性能之间的关系，以及烧结矿碱度、MgO含量、配碳量、添加硼酸和喷洒CaCl2溶液等对低硅烧结矿冶金性能的影响。利用这些试验结果来指导宣钢烧结生产，结果使SiO2含量为4．0％的烧结矿的冶金性能达到了入炉要求。     

固体燃料种类和配比对烧结矿质量的影响

为了合理利用燃料资源和降低生产成本,以混匀矿为主要含铁原料,系统研究了焦粉和2种煤粉对烧结矿化学成分、矿物结构和矿物组成以及烧结矿冶金性能的影响。结果表明,在等热值条件下,焦粉有利于改善烧结矿的中温还原性能,但会恶化其低温还原粉化性能;而2种煤粉做固体燃料可以增加烧结矿总的交织-熔蚀结构,对改善烧结矿的冷态强度和低温还原粉化性能比较有利。     

梅山低SiO2烧结矿的生产

梅山低ＳｉＯ_２烧结矿的生产梅山冶金公司烧结厂李本田１前言高炉使用低ＳｉＯ２烧结矿，入炉铁品位升高，造渣量减少，同时烧结矿高温冶金性能改善，是高炉增铁节焦的重要措施之一。但低ＳｉＯ２烧结矿有其特殊的烧结性能，其抗波动性能较弱，又给烧结生产带来诸多不稳?..     

迁安精矿生产高MgO高碱度烧结矿的研究

本文对迁安地区磁选精矿粉使用高镁石灰作熔剂。以磷灰石粉作添加剂，生产二元碱度２．０左右的高ＭｇＯ高碱度烧结矿，进行了实验室和现场烧结工业试验，对烧结矿的冶金性能进行了测定。结果表明：加入少量的磷灰石粉即可完全抑制烧结矿冷却过程中的自然粉化现象；ＭｇＯ对烧结矿影响明显；烧结矿的冶金性能良好。     

关于昆钢烧结矿低温还原粉化率（RDI）与矿相组成及结构关系的研究报告

介绍了昆钢一、二烧和三烧的烧结矿相组成和结构的不同。探讨了昆钢烧结矿低温粉化的成因，及烧结矿中各种矿相成分，Ａｌ２Ｏ３含量等对ＲＤＩ的影响，分析了烧结矿还原度，低温还原粉化率和ＦｅＯ含量三者的辨证关系，并提出了当前改善烧结矿低温粉化性的方法。     

包钢烧结矿提高MgO含量工业试验总结

本文论述了１９９６年上半年公司开展提高ＭｇＯ含量以改善烧结矿冶金性能的试验，实践证明适当提高烧结矿中ＭｇＯ含量，使高炉炉渣稳定性和炉渣排碱能力以及高炉料柱透气性均有改善，有利于提高生铁产量。     

迁安精矿粉高碱度烧结矿试验研究

对迁安地区磁选精矿粉添加磷石粉和Ｂ２Ｏ３，生产二元碱率为２．０左右的高碱度烧结矿，在实验室和现场进行了试验。结果表明：加入少量磷灰石粉或硼即可完全抑制烧结矿冷却过程中的自然粉化现象；ＭｇＯ含量对烧结矿质量影响明显；烧结矿的冶金性能良好。     

高钛烧结矿还原粉化性能的研究

进行了荷重升温还原法检验高钛型烧结矿的还原粉化性实验，分析研究了高钛型烧结矿在高炉内中低温区的还原粉化行为以及ＦｅＯ含量对烧结矿还原粉和透气性的影响，结果表明，提高高钛型烧结矿的ＦｅＯ含量可改善其还原粉化性能，ＦｅＯ含量以８％～１０％为宜。     

The effect of dolomite addition on the properties of sinters produced from a high aluminous iron ore

This study provides a systematic approach to an evaluation of the sinter properties with increased MgO addition for superfluxed sinters produced from a high aluminous ore. The investigation revealed that part or full replacement of limestone by dolomite in the sinter mix leads to a drop in sinter cold strength, reducibility and production rate, but has a favourable influence on low-temperature reduction strength and probably better softening and meltdown properties. The change in sinter mineralogy due to the MgO addition has a paramount influence on the sinter properties. The Gua iron ore having a high alumina content, is easily amenable to sintering and the sinters produced can constitute a good burden material because of their high reducibility, good cold and hot-strength characteristics. Improved production rates can be expected by choosing dolomites having a smaller crystal size or choosing other suitable MgO-bearing materials. A high circulating load should be expected while producing MgO-bearing sinters.     

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.     

节能型点火炉对烧结矿性能的影响

介绍了两种节能型点火炉的热工特性，通过对它们使用期间台车上的烧结矿进行取样分析，从理论上解释了它们对烧结生产的影响。     

鞍钢烧结配加蛇纹石的实验室研究

蛇纹石作为熔剂部分或全部取代菱镁石的烧结试验表明，随蛇纹石配比增加，烧结固体燃耗降低，烧结矿转鼓强度与烧结机利用系数提高，烧结矿粒度组成趋于合理，冶金性能得到改善。配加蛇纹石对烧结产、质量有利，但每增加1％的蛇纹石，烧结矿品位约降低0．6个百分点。     

Influence of limestone particle size on iron ore sinter properties and productivity

Iron ore fluxed sinter is the main ferrous burden of Jindal south west steel limited (JSWSL) blast furnaces. In sinter plant fluxes including limestone and dolomite are added to improve the sinter properties of iron ore and to provide an appropriate slag composition of the blast furnace. The raw material grain size affects the sinter process considerably because the sinter productivity and quality are strongly dependent on the green permeability of the bed, which is determined by the particle size distribution of the raw materials, the granulation effectiveness and by the sintering process itself. It is well‐known that in fluxed sinter, the size of limestone affects productivity and physical and metallurgical properties of the sinter. It is therefore necessary to understand the role of limestone particle size on sinter properties and productivity. In the present work laboratory sintering experiments have been carried out with different levels of limestone mean particle size (from 0.14 to 1.83mm) to understand the influence of limestone particle size on mineralogy, productivity, physical and metallurgical properties of the sinter. Sinter productivity increased with increasing limestone mean particle size due to improved sinter bed permeability. Sinter with limestone mean particle size of 1.25 to 1.52 mm yielded better sinter strength and lower RDI compared to sinter with smaller or larger limestone mean particle size. Higher sinter strength is due to better and uniform distribution of limestone particles, and better bed permeability enabled easy assimilation and effective distribution of calcium ferrite phases. The improvement in sinter RDI is due to change in mineralogy of the sinter compared to coarser and finer limestone mean particle size.     

Influence of Magnesia on Iron Ore Sinter Properties and Productivity – Use of Dolomite and Dunite

For production of fluxed sinter the use of dolomite and other MgO bearing materials has increased in the recent past. Flux materials influence the microstructure and chemical properties of the resultant sinter. Improvement in raw material quality and use of alternative raw materials play an important role for improving the sinter quality and overall economics of iron and steel making. The physical and metallurgical properties of sinter mainly depend on the mineralogy of the sinter. Dolomite is composed of calcium magnesium carbonate and dunite consists of magnesium silicate. In the present work laboratory sintering experiments have been carried out with different MgO level (1.40 to 2.60 mass%) to know the influence of MgO on the mineralogy, productivity, physical and metallurgical properties of sinter prepared by using dolomite and dunite. Microstructural examinations of the produced sinter revealed that dunite sinter is bounded with higher amounts of hematite and less calcium ferrites when compared to dolomite sinter. Hematite and calcium ferrite phases decreased whereas magnetite phase increased with increase of magnetite content in sinter using both dolomite and dunite. From the test results it was found that dunite sinter showed better metallurgical properties whereas dolomite sinter showed better physical properties.     

Influence of magnesia on iron ore sinter properties and productivity

Abstract

Dolomite and other MgO bearing materials are being increasingly used as basic flux constituents for production of fluxed sinters. Addition of flux materials in sinter influences the resultant sinter microstructure and chemical properties. The physical and metallurgical properties of sinter mainly depend on mineralogy of the sinter. Dolomite is the source of double carbonate of calcium and magnesium. Recent studies reveal that, apart from the additional fuel needed, the addition of dolomite and MgO bearing material greatly influences the magnetite content and the properties of the sinter produced. The increasing use of MgO bearing fluxes in the blast furnace burden, and the trend to incorporate a major part of fluxes in the sinter mix led to an investigation of the influence of MgO on sinter properties and productivity. In this study, the systematic investigation has been made on the influence of MgO% (1·4 to 2·6) on sinter mineralogy and sinter properties with dolomite. Microstructural examination of dolomite sinter revealed that hematite and calcium ferrite phases decreased whereas magnetite phase increased with increase in MgO percentage in sinter. From the laboratory pot grate sintering results it was found that sinter reduction degradation index improved whereas tumbler index and reducibility decreased with increase in MgO%.     

减少ISF布料器筛杆粘料的研究

介绍了ＩＳＦ布料器的结构及工作原理。详细分析了ＩＳＦ布料器在运行过程中筛杆粘料的原因。研究表明：高矫顽力、细粒级的钛磁铁矿是粘结物料的主要矿相，它们与粗糙表面的筛杆之间的磁相互作用使粘结程度日益加重。在此基础上设计并制造了新型布料器筛杆，装机应用表明，粘料程度明显降低，有力地促进了烧结矿产质量的提高。     

Correlating mechanical properties of sinter phases with their chemistry and its effect on sinter quality

In this study, pot sinter tests were carried out to study the sintering properties of iron ores of different alumina (2–4–6%) level. It was observed that the 6% alumina level ores have a higher RDI values and decreased tumbler index (TI) compared to its other two counterparts. It was observed that an increase in composite fracture toughness (CFT) of sinter improves the Tumbler as well as RDI of the sinter. Beyond 4 CFT there is remarkable improvement in TI, RDI and RI values. The mechanical strength parameters of sinter phases were further correlated and analysed with respect to the chemistry of sinter and mineralogy of sinter phases. There is strong evidence which suggests that the Al₂O₃ deteriorates the strength of the phases by making them hard and thus generating cracks in them. Unlike alumina, CaO and SiO₂ tend to stabilise and improve the strength of the phase.     

烧结配加矿化剂的试验研究

在试验室条件下,研究了钒钛磁铁精矿配加矿化剂对烧结过程及成品的影响。结果表明,配加矿化剂后,成品率提高2．26％,利用系数提高9．60％,烧结矿矿相组成和热强度明显改善,RI指数升高1．12％,RDI指数下降1．41％。