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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 >CPR Pellets - A Blast Furnace Grade
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CPR Pellets - A Blast Furnace Grade

机译：心肺复苏术颗粒-高炉等级

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It has been proven theoretically and experimentally that the use of 10 - 30 per cent DRI in blast furnace along with iron ore or sinter results in lower coke rate and higher productivity. However, to-date this remains unpractised on a regular basis mainly because of economic reasons. The DRI produced by several methods are expensive and difficult to store/handle in large quantities because of its reactive nature and thus DRI in blast furnace remains unacceptable. CPR (Composite Pre-Reduced) pellets developed at BHU-Varanasi (India) is a kind of DRI which indicates less storage problems and estimated to be cheaper than coke price in India. CPR pellets contain iron in highly metallised state in the core encased in partially reduced shell of iron oxide as protective layer for safe and easy storage. The lower cost of CPR pellets is mainly because of the use of cheap raw materials and energy source for firing without needing expensive reducing atmosphere for causing metallisation in the pellet. The pellet firing system is simple requiring less capital. The paper gives details of the CPR pellet preparation technique and then it evaluates its chemical and physical properties for blast furnace use. It also gives the estimated cost of production under Indian condition and mentions the various merits associated with the use of CPR pellet in the blast furnace. The status of the project is described before concluding the paper.
机译：从理论上和实验上已经证明，在高炉中使用10％到30％的DRI以及铁矿石或烧结矿会降低焦炭率，提高生产率。然而，迄今为止，主要由于经济原因，至今仍没有定期实施该操作。通过多种方法生产的DRI由于其反应性而价格昂贵并且难以大量存储/处理，因此高炉中的DRI仍然不可接受。 BHU-Varanasi（印度）开发的CPR（复合预还原）颗粒是一种DRI，它指示出较少的存储问题，并且估计比印度的焦炭价格便宜。 CPR药丸的芯中高度金属化状态的铁包裹在部分还原的氧化铁壳中，作为保护层，可安全，轻松地保存。 CPR药丸的成本较低主要是因为使用了廉价的原料和能源进行焙烧，而无需使用昂贵的还原气氛来使药丸中的金属化。丸粒发射系统很简单，所需资金更少。本文详细介绍了CPR颗粒制备技术，然后评估了其在高炉中的化学和物理性能。它还给出了印度条件下的估计生产成本，并提到了与在高炉中使用CPR颗粒相关的各种优点。在结束本文之前，先描述项目的状态。

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