涟钢360m~2烧结机低成本保质量生产实践

在低成本生产要求下,涟钢360m2烧结机自2012年以来,开始大量使用非主流矿,造成360m2烧结矿转鼓下降明显,为此我厂从配矿结构调整、料场混匀管理、烧结工艺参数优化等方面着手,在依然保持非主流矿配比较高条件下,确保烧结矿转鼓强度的大幅回升,满足了7#高炉生产需求。     

屯秋矿业公司柳州配矿场的生产实践

本文介绍了柳州配矿场的生产工艺流程及配矿混匀的生产管理,同时还提出了存在的问题及解决的措施。     

唐钢炼铁厂使用低品质矿的生产实践

通过对低品质矿基础性能的研究,为优化配矿和指导烧结及高炉生产提供了依据.在生产实践中,通过细化低品质矿的使用流程,优化配矿操作,采取提高混匀配矿稳定性的措施,并对烧结配料系统、布料设备、点火装置等进行改造,以及优化高炉操作制度,保证了增加低品质矿使用量后,烧结及高炉生产技术指标的稳定,达到降本增效的目的.     

黏性物料参与混匀配矿的生产实践

分析武钢有限炼铁厂原料分厂在使用黏性物料过程中遇到的问题,采取制定合理的配矿结构、分block配矿、加强水分控制、提高生产组织的合理性及改善设备条件等一系列措施,确保了混匀矿生产顺行、质量稳定,达到加大黏性物料用量、降低生产成本的目的,也为其他原料厂使用黏性物料提供参考。     

混匀矿TFe／SiO2比与烧结矿TFe关系初探

本文采用线性回归法，探讨了成钢原料条件下，烧结矿ＴＦｅ品位同混匀矿ＴＦｅ／ＳｉＯ２比值之间的关系，并分析了它在合理采购矿石，最佳混匀配矿，企业生产管理等方面的应用价值。     

北营烧结配矿的经济性研究

烧结生产使用的含铁原料品种多、成分复杂、冶金性能各不相同,需进行配矿混匀以稳定成分和粒度,获得物化性能和冶金性能均一的混合料,保证烧结生产的稳定和高效。以360 m2烧结机的配比作为烧结杯试验的基准试验方案,在基本不改变混匀矿品位、SiO2含量、碱度、MgO含量等的基础上,调整各种矿粉的配比,并对烧结矿的多种指标进行检测,最终确定比较经济的配矿方案。     

烧结优化配矿的研究与实践

目前我国大多数钢铁企业因无固定的原料供应,用料复杂,成分多变,含铁原料的混匀配矿也就成了烧结生产中一道必不可少的工序。如何在满足混匀矿成分受控及各原料存量约束的前提下,做到配矿成本最优,具有非常重要的现实意义。本文以新余钢铁公司烧结厂为例,利用线性规划原理对上述问题进行了研究,并作了相应的探索与实践。     

混匀矿造堆过程控制与适时调整

唐钢炼铁部通过优化混匀矿配料结构,控制混匀矿的Si02,稳定烧结矿的化学成分,不仅保证了烧结矿质量,而且降低了烧结矿原料成本.通过混匀矿造堆过程控制提高混匀矿产量,减少混匀矿成分波动,使混匀矿的生产组织与质量控制得以有机结合.通过堆计划的适时调整,保证混匀矿造堆实际成分与计划的一致性,提高了混匀矿质量,满足了烧结生产需要.     

鞍钢鲅鱼圈烧结低成本配矿生产实践

为了降低烧结矿成本,鞍钢股份有限公司鲅鱼圈钢铁分公司进行了低成本配矿生产实践,在混匀矿造堆过程中配加混杂料和低价进口粉矿,烧结配料使用廉价固体燃料,在保证烧结矿产量和质量的前提下,达到了降低烧结矿成本的目的.     

线性规划模型在优化混匀矿堆积计划中的应用

基于运筹学思想,以原料场混匀矿配矿成本为目标,建立多矿源含铁原料配料线性规划模型,优化混匀矿堆积计划含铁原料配比。利用Excel软件中的＂规划求解＂工具对模型进行求解,计算经济合理的含铁原料配比,达到降本增效的目的。模型计算结果表明,在满足烧结矿质量要求前提下,线性规划模型比经验配料法混匀矿吨矿配矿成本下降24元。     

富氧顶吹熔融还原冶炼高磷铁矿与钛铁矿配矿的试验研究

采用模拟HIsmelt的富氧顶吹熔融还原技术冶炼惠民高磷铁矿与勐桥钛铁矿配矿,在温度为1 500K,碱度为1.3,配碳比为1.0的条件下,恒温时间20min(在升温过程中,没有通入惰性气体),恒温过程中通入O2(流量250L/h、纯度为99%)10min。恒温时间结束后,调整氧气流量为5L/h,保持其氧化性气氛至冷却。研究了不同配矿比例对铁回收率、生铁中磷、硫含量以及磷、硫分配比的影响。研究结果表明,在惠民铁矿和勐桥精矿的比例为1∶1时,其冶炼结果比较理想:铁的回收率为95.1%,生铁中磷的质量分数约为0.32%,硫的质量分数为0.054%,钛的质量分数为0.031%。     

Influence of Mechanical Activation on Acid Leaching Dephosphorization of High-phosphorus Iron Ore Concentrates

High pressure roll grinding (HPRG)and ball milling were compared to investigate the influence of me-chanical activation on the acid leaching dephosphorization of a high-phosphorus iron ore concentrate,which was man-ufactured through magnetizing roasting-magnetic separation of high-phosphorus oolitic iron ores.The results indica-ted that when high-phosphorus iron ore concentrates containing 54·92 mass% iron and 0·76 mass% phosphorus were directly processed through acid leaching,iron ore concentrates containing 55·74 mass% iron and 0·33 mass%phosphorus with an iron recovery of 84·64% and dephosphorization of 63·79% were obtained.When high-phosphor-us iron ore concentrates activated by ball milling were processed by acid leaching,iron ore concentrates containing 56·03 mass% iron and 0·21 mass% phosphorus with an iron recovery of 85·65% and dephosphorization of 77·49%were obtained.Meanwhile,when high-phosphorus iron ore concentrates activated by HPRG were processed by acid leaching,iron ore concentrates containing 58·02 mass% iron and 0·10 mass% phosphorus were obtained,with the iron recovery reaching 88·42% and the dephosphorization rate reaching 88·99%.Mechanistic studies demonstrated that ball milling can reduce the particle size,demonstrating a prominent reunion phenomenon.In contrast,HPRG pretreatment contributes to the formation of more cracks within the particles and selective dissociation of iron and P bearing minerals,which can provide the favorable kinetic conditions to accelerate the solid-liquid reaction rate.As such,the crystal structure is destroyed and the surface energy of mineral particles is strengthened by mechanical ac-tivation,further strengthening the dephosphorization.     

Mixed State and High Effective Utilization of Pilbara Blending Iron Ore Powder

 Pilbara blending iron ore powder (PB powder) is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively, such as the macroscopic properties, microscopic properties, and high-temperature properties; the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was further validated through the sintering pot test and industrial production. The results show that: PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45%.     

高磷铁矿石脱磷技术研究现状及发展趋势

高磷铁矿石的选矿已成为国内外的一大选矿技术难题,本文总结了当前国内外高磷铁矿脱磷工艺的研究现状及方法,从我国高磷铁矿选矿技术现状和高磷铁矿选铁脱磷工艺存在的问题进行了综述和分析,提出开发高磷铁矿石的提铁降磷工艺的发展方向及趋势.     

低品质铁矿石经济性综合评价

介绍了低品质铁矿石的传统评价方法及其存在的问题,提出一种低品质铁矿石经济性评价新方法,即采用低品质矿石配到以传统料为骨架的中和料中,计算烧成后的烧结矿冶金价值,并结合高炉炉料结构评价其经济性和预测铁水成分。计算结果表明,该评价方法更能实际反映铁矿石冶炼的经济性,并用计算实例分析了消化某高磷铁矿对降低铁水成本的贡献。     

混合铁矿粉的烧结基础特性

 对邯钢5种常用矿粉及其混合矿的烧结基础特性进行了研究。结果表明：巴粗矿粉对混合矿的同化温度和液相流动性的影响最大,澳矿粉对混合矿的粘结相强度影响最大。以粘结相强度为基准,综合考虑同化温度和液相流动性,邯钢最优配矿方案为：澳矿粉(30%~35%)+邯邢精粉(15%~20%)+巴粗矿粉(20%~25%)+杨迪粉(10%~15%)+北非粉(5%~10%);混合矿中单种矿的烧结基础特性之间存在一定的互补关系,但混合矿烧结基础特性不能简单地由单种矿烧结基础特性的线性加和来确定。     

基于铁矿粉基础工艺性能的烧结优化配矿方法研究进展

铁矿粉供应的复杂多变加剧了烧结配矿的难度,易导致烧结生产及烧结矿性能的不稳定。传统的烧结杯试验配矿方法费时费力,研究开发新的优化配矿方法替代传统烧结杯试验配矿方法是钢铁企业提高配矿效率、实现降本增效的重要途径。详细介绍了铁矿粉常温性能、铁矿粉高温性能、热力学计算等指导烧结配矿的方法,分析了主要烧结配矿方法的技术特点,对烧结配矿研究方向进行了展望。指出铁矿粉的高温性能是基于铁矿粉基础工艺性能的烧结优化配矿方法的核心。查明铁矿粉关键基础工艺性能与烧结产质量的关系,是解决烧结优化配矿可靠性的关键。     

低品质矿烧结工艺开发与应用

介绍了天铁集团严格按照市场预算控制的要求,不断谋求低成本运行模式,充分利用价格低廉的铁矿资源,开发低品质矿烧结新技术的情况。通过采取优化配矿结构、加强原料中和混匀、同步调整生产工艺、喷洒CaCl2溶液降低烧结矿低温还原粉化率等举措,使烧结生产对原料的适应性显著增强,为综合利用铁矿石资源提供了借鉴。     

Rules of Assimilation of Single Ore and Mixed Ores

Assimilation behaviors of 7 kinds of iron ores from Australia, Brazil, India, South Africa and China were evaluated and analyzed. On the basis of that, four ore blending principles were proposed, and seven groups of iron ore powder blending schemes were designed. The ores of different types or from different places are shown apparently different in assimilation. The assimilation of hematite in Australia, Brazil and India is relatively high, but the assimilation of magnetite in South Africa and China and specularite in China is relatively low. The assimilation of the ores has negative correlation with MgO content and binary basicity, while the assimilation of the ores has positive correlation with porosity, SiO₂ and Al₂O₃ contents, and crystal water. The iron ores with smaller crystal size and microstructure looseness have relatively higher assimilation. Assimilation of mixed ores has relationship of linear, arch and “S” types to the ratio of single iron ore powder. When the charge ratio of ore is less than 25%, it possesses additivity, providing theoretical basis for optimization of ore matching.     

铁矿粉烧结优化配矿及其模型研究进展

随着铁矿粉资源的不断消耗,各类铁矿粉呈劣化趋势,且大量新矿种出现,使烧结优化配矿需求愈发迫切.主要介绍了铁矿粉常温和高温等基础特性.其中,常温特性主要有化学成分、铁矿粉种类、粒度组成等,同时重点分析了与烧结生产息息相关的高温特征指标,主要有同化性、液相流动性、黏结性强度、铁酸钙生成特性、连晶特性、熔融特性、吸液性和烧结...