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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 >Circored~(~R) and Circofer? Two New Fine Ore Reduction Processes
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Circored~(~R) and Circofer? Two New Fine Ore Reduction Processes

机译：绕圈〜（〜R）和绕圈圈？两种新的精矿还原工艺

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The total world steel production in 1998 amounted to approximately 780 000 000 t. The share of electric steelmaking was in the range of 35 per cent and is expected to increase further to over 40 per cent of the world's production within the next ten years. As electric steelmaking is primarily based on the use of scrap and as it is progressing more and more into higher steel grades the need for low-residual metallics will become increasingly important. Consequently, the demand for scrap substitute material will increase, reflected in the world wide spate of interest for DRI (Direct Reduced Iron) and HBI (Hot Briquetted Iron). The increased significance of DRI/HBI as a substitute for steel scrap has obviously emanated also from its comparatively lower and more predictable costs per ton and definable chemistry. In 1998 already 37 million tons of DRI/HBI were globally produced. The iron oxide requirement of the existing gas or coal based reduction processes in the form of lump ores and pellets, the availability of which is becoming increasingly scarce with the rising demand in directly reduced iron material, necessitates the construction of capital and operating cost intensive iron ore beneficiation and pelletising plants with concentrators.Lurgi's newly developed direct reduction technologies, the gas based Circored~(~R)and coal based Circofer~(~R)processes for the direct reduction of iron ore fines, adequately cover the requirements of producing highly metallised low-cost scrap substitute materials as DRI or HBI. Countries with low priced natural gas recourses will preferably apply the Circored process, whereas in regions with high costs for natural gas, the new coal based Circofer process is the ideal solution. Iron ore fines as an inexpensive raw material source with a difference to pellet charge of up to 20 US$ per t of product can be applied in both processes.
机译：1998年世界钢铁总产量约为7.8亿吨。电动炼钢的份额在35％左右，预计在未来十年内将进一步增加到世界产量的40％以上。由于电动炼钢主要基于废钢的使用，并且随着其向更高钢种的发展，对低残留金属的需求将变得越来越重要。因此，对废料替代材料的需求将增加，这反映在世界范围内对DRI（直接还原铁）和HBI（热压铁）的关注上。显然，DRI / HBI替代废钢的重要性越来越高，这还源于其相对较低且可预测的每吨成本和可定义的化学物质。在1998年，全球已经生产了3,700万吨的DRI / HBI。现有的以瓦斯或煤为原料的块状矿石和球团形式的还原工艺对氧化铁的需求随着直接还原铁材料的需求增加而变得越来越稀缺，这需要建设资本和运营成本密集的铁鲁吉（Lurgi）新开发的直接还原技术，用于直接还原铁矿粉的基于气体的Circored〜（〜R）和基于煤的Circofer〜（〜R）工艺，足以满足高产量的要求金属化的低成本废钢替代材料，如DRI或HBI。天然气价格低廉的国家最好采用Circored工艺，而在天然气成本高的地区，新的煤基Circofer工艺是理想的解决方案。铁矿石细粉作为​​一种廉价的原料来源，每吨产品的球团矿费用最高可相差20美元。

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