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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 >Ore Grinding Energy Minimisation by Thermal Treatment
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Ore Grinding Energy Minimisation by Thermal Treatment

机译：通过热处理使矿石粉碎的能量最小化

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摘要

Grinding of iron ore is an essential step to utilise ore fines for pelletisation needed for DRI units. While preparing iron ore pellets for DRI production, the iron ore needs extensive grinding which is highly energy consuming step causing the process to become non-viable in some cases. In the present paper an attempt has been made to evaluate grinding performance of thermally treated ore compared to normal ore grinding. Such thermal pre-treatment has been found to reduce the energy requirement with lower consumption rate of grinding media. It has been observed that by applying thermal shock the ore is rendered weak with improved grindability. The stresses generated due to thermal treatment may extend existing micro-cracks in the ore and in some cases it may even nucleate fresh cracks. Experimental studies carried out on thermally treated hematitite ore reveals that the heating to 400℃ followed by water quenching can cause a reduction of 45 per cent in grinding energy. The paper gives the details of the experiment and the results.
机译：铁矿石的磨碎是利用DRI设备所需的矿粉进行制粒的必不可少的步骤。在准备用于DRI生产的铁矿石球团时，铁矿石需要大量研磨，这是非常耗能的步骤，导致该工艺在某些情况下变得不可行。在本文中，已经尝试评估与普通矿石研磨相比热处理的矿石的研磨性能。已经发现这种热预处理以较低的研磨介质消耗速率来降低能量需求。已经观察到，通过施加热冲击，矿石变得脆弱并且具有改善的可磨性。热处理产生的应力可能会延长矿石中现有的微裂纹，在某些情况下甚至可能使新裂纹成核。对经过热处理的赤铁矿矿石进行的实验研究表明，加热至400℃，然后用水淬火可以使研磨能量降低45％。本文给出了实验的细节和结果。

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