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首页> 外文会议>International Conference on Alternative Routes of Iron and Steelmaking ICARISM'99, Sep 15-17, 1997, Perth, WA >Preparation of Iron Oxide Feed Stock for Pig Iron/Sponge Iron Production - Role of NMDC
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Preparation of Iron Oxide Feed Stock for Pig Iron/Sponge Iron Production - Role of NMDC

机译：用于生铁/海绵铁生产的氧化铁原料的制备-NMDC的作用

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Traditionally, the blast furnace (BF) has maintained a dominant position as the primary source of iron units. Notwithstanding the efficient nature of the process in respect of its material and energy consumption, the conventional blast furnace route is faced with limitations such as stringent quality metallurgical coke, high capital investment, etc. While BF will continue to retain its predominant position as the foremost ironmaking technology, the alternate processes may also have a role to play. Direct Reduced Iron (DRI) or sponge iron industry is all set to take a firm root in India as one important solution to the problems of shortage of metallurgical coal and ferrous scrap and high investment costs faced by the country's steel industry. The commercial proven DR processes coupled with electric arc furnace (EAF) steelmaking have also offered a viable alternative to the blast furnace - basic oxygen furnace (BF - BOF) route for the installation of integrated plants under specific local conditions. The performance and efficiency of DRI processes mainly depend upon the chemical and physical behaviour of the raw materials especially the iron bearing materials. Iron oxide pellet and sized lump ore constitute the oxide feed stock, while pellets form an ideal feed stock for direct reduction, use of lump ore is economically advantageous because of its lower price. National Mineral Development Corporation Limited (NMDC), being one of the major producer of iron ore in the country since last four decades, has established technology and developed process flowsheets for production of suitable calibrated lump ore for DRI production, besides supplying the natural lump ore for conventional blast furnace requirements. In addition to the above, extensive pilot plant tests have been carried out at the R&D Centre of NMDC for preparation of iron ore concentrates suitable both for direct reduction and blast furnace grade pellet feed using the iron ore fines from its own mines and as well as from the other iron ore mines in the country. For utilisation of the huge quantity of slimes generated in its ore processing plants, NMDC has planned to set up the first commercial plant adopting the smelt reduction process (ROMELT Process) for production of pig iron from Bailadila slimes. The paper mainly deals with various beneficiation techniques adopted for production of DR/BF grade pellet feed from iron ore fines. Also presented in the paper, the extensive work carried out at R&D Centre on preparation and evaluation of calibrated lump ore (Natural Pellets), based on which, suitable modifications are incorporated in the ore processing plants of NMDC for production and supply of the same to sponge iron industries.
机译：传统上，高炉（BF）一直是主要的铁源。尽管该工艺在材料和能耗方面具有高效性，但传统的高炉路线仍面临着严格的要求，例如严格的冶金焦质量，高投资成本等。而高炉将继续保持其最重要的地位。炼铁技术的替代过程也可能发挥作用。直接还原铁（DRI）或海绵铁行业都将在印度扎根，作为解决冶金煤和黑色金属废料短缺以及该国钢铁行业面临的高投资成本的重要解决方案。经商业验证的DR工艺与电弧炉（EAF）炼钢相结合，还为高炉-碱性氧气炉（BF-BOF）路线提供了可行的替代方案，用于在特定的本地条件下安装集成式工厂。直接还原铁工艺的性能和效率主要取决于原材料特别是含铁材料的化学和物理行为。氧化铁球团和上等的块矿构成氧化物原料，而球团形成直接还原的理想原料，由于价格低廉，块矿的使用在经济上是有利的。国家矿产开发公司有限公司（NMDC）自过去四十年以来一直是该国主要的铁矿石生产商之一，除了提供天然块矿外，还建立了技术并开发了工艺流程表，用于生产适合DRI生产的校正过的块矿。满足常规高炉要求。除上述内容外，还在NMDC的研发中心进行了广泛的中试工厂测试，以制备铁矿石精矿，该铁精矿既适用于直接还原也适用于高炉级颗粒饲料，其使用的是自己矿山中的铁矿粉以及来自该国其他铁矿石矿山。为了利用其矿石加工厂中产生的大量煤泥，NMDC计划建立首家采用冶炼还原工艺（ROMELT工艺）的商业工厂，以从拜拉迪拉煤泥生产生铁。本文主要涉及采用各种选矿技术从铁矿粉生产DR / BF级颗粒饲料。论文中还介绍了在研发中心进行的关于准备和评估标准块矿（天然球团）的广泛工作，在此基础上，NMDC的选矿厂进行了适当的修改，以生产和供应该矿。海绵铁行业。

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