翼 钢 烧 结 矿 的 冶 金 性 能

 翼钢烧结原料品种多,烧结矿冶金性能变化大,致使高炉冶炼不稳定,出现焦比高、产量低、成本高等问题。笔者以翼钢现有南非矿、球团矿筛下、代县铁精矿粉、熔剂和返矿为烧结原料,对翼钢烧结矿进行优化配矿试验,分析了烧结矿各原料特性及不同配比烧结矿的冶金物理性能,测定了烧结矿的还原性、软化性、低温还原粉化率,并在此条件下结合线性规划方法,寻求适合翼钢烧结生产的最佳配矿方案。     

酒钢烧结配加蒙古粉矿烧结杯试验研究

针对蒙古粉矿合理配矿的问题,进行了蒙古粉矿单种矿烧结杯试验,研究蒙古粉矿的烧结性能;并进行了混匀精矿与蒙古粉矿的配矿试验研究,推荐了蒙古粉矿的合理配比。     

蚁群算法在杭钢烧结混匀矿等SiO2等TFe配料中的应用

针对杭钢炼铁厂烧结工艺的要求，以混匀矿SiO2和TFe含量精度为目标函数，建立了烧结主原料混匀矿等SiO2等TFe配料数学模型，采用蚁群算法对混匀矿配比进行实时优化计算，取得了良好效果，保证了任一时刻堆积物料中SiO2含量和TFe含量与大堆预想成分中的含量基本相近。     

供炼品种钢与非品种钢的烧结流程探讨

对供炼品种钢与非品种钢所用混匀矿的配矿种类的差异、主要化学成分含量的变化以及混匀矿的亲水性、平均粒径的差异进行了对比分析;结合生产实际分析了供炼品种钢与非品种钢所用混匀矿在烧结过程中,在混合料的水分、煤配比、布料的料层厚度、垂直烧结速度控制上的区别;最后提出了品种钢与非品种钢用矿转换期间如何稳定地组织好烧结生产。     

鞍钢鲅鱼圈烧结配矿试验研究与工业应用

为保证鞍钢鲅鱼圈高炉顺利开工,根据鲅鱼圈的现有运输条件和铁粉矿资源,进行了高比例赤铁粉矿烧结的配矿研究。通过对各种配矿方案(包括全部采用赤铁粉矿)进行烧结杯试验,并对烧结矿的高温冶金性能、矿物组成和微观结构等进行检测、比对和分析,认为方案1能够满足鲅鱼圈分公司烧结开工的配矿要求。经生产验证,烧结矿合格率、品位、碱度及转鼓强度、利用系数、<5 mm粉末含量等指标维持在3σ~4σ的水平,可以满足大高炉生产需求,保证高炉的稳定顺行。鲅鱼圈烧结和高炉的开工标志着鞍山钢铁集团大比例粉矿烧结时代的开启。     

重钢烧结经济配矿生产实践

重钢针对烧结配矿料种无主骨架、配矿结构不合理、矿石质量不稳定等问题,开展烧结经济配矿,采取明确烧结目标配矿方案、以性价比为标准采购矿石、坚持采购低Al2O3矿石原则、优化烧结工艺等多项措施,提高了混匀料品位,提高了烧结矿质量;混匀料TFe由57.57%提高至60.56%,烧结矿转鼓强度由75.77%提高到76.54%;保证了高炉生产稳定顺行。     

高磷矿参与混匀配料的生产实践

介绍了高磷矿的理化性能,以及高磷矿参与混匀配料的系列生产试验。通过制定合理的配矿方案,控制高磷矿的配比,在满足高炉生产需要的同时,降低了混匀矿配矿成本。     

鲅鱼圈全粉矿烧结配加低品位高铝铁矿粉试验

 在鞍钢鲅鱼圈全粉矿烧结生产条件下,进行了配加不同比例低品位高铝铁矿粉的烧结试验研究,并对烧结矿冶金性能进行了检测分析,同时采用光学显微镜进行了矿相组成、矿相结构的分析研究。结果表明：随着低品位高铝铁矿配比的增加,烧结技术指标逐渐降低,但是从烧结矿冶金性能和矿物学方面分析来说,配加一定量该矿有助于提高其冶金性能,综合考虑,烧结配加低品位高铝铁矿是可行的,而其适宜比例为5%。     

基于铁矿粉高温基础性能的烧结配料优化研究

对铁矿粉的高温基础性能进行了测定,并以此为依据,进行了烧结杯优化配矿试验.以垂直烧结速度、转鼓强度和低温还原粉化性能作为评价指标,考察了不同配矿方案的优劣.结果表明:当改变混合料中高温基础性能不同的铁矿粉配比时,会对烧结过程生成液相的数量产生影响,进而影响烧结矿产量和冶金性能.     

进一步降低烧结工艺成本的优化配矿试验

 为了降低烧结工艺生产成本,针对北钢360m2烧结机的原料条件及生产状况,对现有配矿方案进行了进一步优化。在基本不改变混合料品位、碱度和SiO2含量等指标的基础上,通过增大低成本矿粉配比,降低高成本矿粉配比,同时调整其他原料配比,制定6种成本较低的配矿方案,并通过烧结杯试验进行了验证。结果表明,2种澳洲矿粉的总配比不宜超过45%;2种巴西矿粉的配比应尽量一致;最优配矿方案可降低烧结混合料成本16.02元/t,且烧结生产指标及烧结矿质量会有改善;仅仅通过调整现有矿粉配比,就可以在改善烧结生产经济技术指标的同时,实现烧结成本的进一步降低。     

铝硅比对烧结成矿特性及冶金性能的影响

Al2O3和SiO2是复合铁酸钙的重要组分,适宜的铝硅比是获得良好烧结成矿特性和冶金性能的重要条件.基于某钢厂现场烧结原料结构,运用FactSage理论计算了烧结体系的平衡物相组成及液相组分变化规律,随着铝硅比由0.41降至0.34,烧结矿中液相、铁氧化物等优质物相含量增加,尖晶石等劣质物相含量下降,且液相中析出复合铁...     

Influence of Alumina on Iron Ore Sinter Properties and Productivity in the Conventional and Selective Granulation Sintering Process

Iron ore sinter constitutes a major proportion of blast furnace burden. Hence, its quality and consistency have a significant impact on blast furnace performance. Iron ore fines are the main source for sinter, and the chemical composition of the iron ore fines, together with the thermal conditions that blends are subjected to, plays an important role in forming the primary melt during the sintering process and accordingly determines the sinter structure and quality. Therefore, considerable importance has been placed on the chemical composition and consistency of iron ore fines, particularly in terms of alumina content. Due to depletion of high grade iron ore resources, alumina content in the iron ore fines is expected to increase gradually. Ore with higher alumina content is usually expected to be detrimental in forming the sinter matrix, if sintered alone, due to the low reactivity of alumina bearing minerals and the high viscosity of primary melts. The selective granulation process is a new sintering process for high alumina iron ore fines, and can eliminate the adverse effects of ‘hard to sinter’ or ‘unsuitable – for ironmaking’ ores. In the present work laboratory sintering experiments have been carried out with iron ore fines of different alumina level (2.00 to 5.46 mass‐%) to know the influence of alumina on mineralogy, productivity, physical and metallurgical properties of sinter prepared by the conventional and the selective granulation process. With increasing alumina content in sinter of both the conventional and selective granulation process, the fractions of hematite and of silico‐ferrites of calcium and alumina (SFCA) as well as the pore phase increased whereas the magnetite and silicate phases decreased. With increase in alumina content sinter productivity and tumbler index (T.I.) decreased, and metallurgical properties like sinter RDI and reducibility improved. However, sinter of the selective granulation process showed better results compared to the conventional process.     

CVRD矿在青钢的应用

巴西 CVRD矿具有含铁品位高、有害杂质少、烧结性能良好的特点。采用 CVRD矿作为烧结配矿的主矿 ,经合理配比和优化工艺参数 ,烧结生产率提高 ,烧结矿质量改善 ,冶金性能提高     

配用WPF粉矿烧结试验研究

通过小型烧结试验装置对低品质WPF澳矿粉的高温特性进行了研究。在此基础上,对应用WPF的配矿方案进行了烧结杯试验。研究结果表明,WPF的同化性较高,但是液相流动性较弱,因此可以利用其高温特性与其他矿粉搭配烧结,弥补其SiO2和Al2O3含量较高的缺点。WPF矿粉配比在10%～15%时有利于烧结矿取得良好的冶金性能,同时增加烧结矿中还原性能良好的针状铁酸钙含量。     

石钢烧结配加马来西亚粉烧结性能的研究

研究了石钢烧结生产配加马来西亚粉对烧结矿利用系数、烧结矿转鼓强度及返矿率等指标的影响,试验结果显示烧结矿的冶金性能有所改善,认为在生产条件下配加马来西亚粉烧结是可行的。通过生产跟踪,确定马来西亚粉的最佳配比为10%~15%。     

Sintering Properties and Optimal Blending Schemes of Iron Ores

 In order to obtain good sintering performance, it is important to understand sintering properties of iron ores. Sintering properties including chemical composition, granulation and high-temperature behaviors of ores from China, Brazil and Australia. Furthermore, several indices were defined to evaluate sintering properties of iron ores. The results show that: for chemical composition, Brazilian ores present high TFe, low SiO2, and low Al2O3 content. For granulation, particle diameter ratio of Brazilian ores are high; particle intermediate fraction of Chinese concentrates are low; and average particle size and clay type index of Australian ores are high. For high-temperature properties, ores from China, Brazil and Australia present different characteristics. Ores from different origins should be mixed together to obtain good high-temperature properties. According to the analysis of each ore′s sintering properties, an ore blending scheme (Chinese concentrates 20%+Brazilian ores 40%+Australian ores 40%) was suggested. Moreover, sinter pot test using blending mix was performed, and the results indicated that the ore blending scheme led to good sintering performance and sinter quality.     

一种新型烧结矿--包钢第三代烧结矿

通过对包钢第三代、第二代烧结矿化学成分、矿物组成、显微结构、强度及冶金性能的对比，评价了第三代烧结矿的各项性能。说明第三代烧结矿是适合于冶炼白云鄂博铁矿的烧结矿。     

乌石山矿烧结的试验研究

乌石山矿可以改善烧结料层的透气性，提高垂直烧结速度，并降低烧结矿的生产成本，但过高的配比会降低烧结矿的含铁品位并对烧结矿的冶金性能不利，在南昌钢铁厂目前的技术经济条件下，乌石山矿的配比以控制在１０％￣２０％较为适宜。     

天铁高炉炉料结构研究

通过对高碱度烧结矿和酸性烧结矿的冶金性能测试及烧结杯试验数据的分析，确定天铁高炉炉料结构为R=1．8度烧结矿和R=0．7酸性烧结矿搭配，为指导高炉生产，进一步优化高炉炉料结构提供理论了依据。