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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 >CRIMM―A New Process for Production of Directly Reduced Iron with Coal-Based Rotary Kiln
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CRIMM―A New Process for Production of Directly Reduced Iron with Coal-Based Rotary Kiln

机译：CRIMM－煤基回转窑生产直接还原铁的新工艺

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摘要

This paper introduces a new coal-based rotary kiln process of DRI production - the CRIMM process, which is developed by Changsha Research Institute of Mining and Metallurgy in the past years. Its main features are the use of composite pellets (in rotary kiln). The process consists of preparation of pellets from iron concentrate and coating of coal on their surfaces. The new process is able to overcome a series of defects of the conventional coal-based rotary kiln processes. A continuous test was conducted using an experiment rotary kiln (-0.6_(in) x 3 m). TFe of the magnetic iron concentrate used in the test is 67.25 percent. TFe of the product DRI is 88.54 percent, MFe is 84.11 percent, S and P are less than 0.02 percent. The metallisation ratio of pellet is 95 percent. The pellet power ratio is less than 0.3 percent. The utilisation coefficient of rotary kiln is 1.3 t/m~3@d. The overall recovery of iron concentrates is 99.7 percent. Two small industrial plants using the CRIMM process are being set up in China. Their coal consumption can be decreased to 520 kg standard coal per ton DRI respectively.
机译：本文介绍了长沙矿业冶金研究院在过去几年中开发的一种新型的煤基DRI生产回转窑工艺-CRIMM工艺。它的主要特征是使用复合颗粒（在回转窑中）。该过程包括由铁精矿制备球团并在其表面上覆盖煤。新工艺能够克服常规煤基回转窑工艺的一系列缺陷。使用实验回转窑（-0.6_（in）x 3 m）进行了连续测试。测试中使用的磁性铁精矿的TFe为67.25％。产品DRI的TFe为88.54％，MFe为84.11％，S和P小于0.02％。颗粒的金属化率为95％。颗粒功率比小于0.3％。回转窑的利用率为1.3 t / m〜3 @ d。铁精矿的总回收率为99.7％。中国正在建立两个采用CRIMM工艺的小型工厂。它们的煤炭消耗可以分别降至每吨DRI 520千克标准煤。

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