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首页> 外文期刊>ISIJ international >The Effect of Additives and Reductants on the Strength of Reduced Iron Ore Pellet
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The Effect of Additives and Reductants on the Strength of Reduced Iron Ore Pellet

机译：添加剂和还原剂对还原铁矿石颗粒强度的影响

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The higher strength of directly reduced iron (DRI) in pellet form is useful in handling, storing and charging from height without breakage. The DRI pellets commonly exhibit 60kg cold crushing strength. In this work the effect of reduction temperature, sintering time, quantity/quality of additives and manner of reduction by solid reductant has been studied. The reduced pellet strength could be increased by improving metallic bonds by offering higher reduction temperature (max. 1250 deg C) and subsequent sintering. The strength was found to increase by adding slag forming constituents e.g. bentonite. The strength of reductant mixed reduced pellet was observed to be affected by the nature of reductant. The reductant with low bulk density and lower carbon content provided higher voidage rendering lower strength. The cold crushing strength (CCS) of reduced pellets observed in this study ranged from 5 to 200 kg exhibiting ductile to brittle behaviour during deformation.
机译：颗粒状直接还原铁（DRI）的较高强度可用于从高处搬运，储存和装填而不会破裂。 DRI颗粒通常具有60kg的冷压强度。在这项工作中，研究了还原温度，烧结时间，添加剂的数量/质量以及固体还原剂还原方式的影响。降低的丸粒强度可以通过提供更高的还原温度（最高1250摄氏度）并随后进行烧结来改善金属结合力来提高。发现通过加入形成炉渣的成分例如铁的方法来提高强度。膨润土。观察到还原剂混合还原粒料的强度受还原剂性质的影响。具有低堆积密度和较低碳含量的还原剂提供较高的空隙率，从而导致较低的强度。在这项研究中观察到的还原颗粒的冷压强度（CCS）为5至200 kg，在变形过程中表现出韧性至脆性。

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