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通过计算反应吉布斯自由能研究机械活化后的碳对氧化锌和氧化铁开始还原温度的影响,对碳热还原反应进行了热力学分析.结果表明,具有机械储能的碳不仅会使氧化铁和氧化锌开始还原的温度显著降低,还进一步改善了碳粉的还原能力,达到了节能降耗的目的.机械活化后的碳使氧化锌开始还原的温度降低了185℃,赤铁矿开始还原的温度降低了105℃,主要原因是碳在机械活化过程中产生了晶格畸变能和表面能,其中又以晶格畸变引起的位错能和无定型化能为主要储能来源.
The thermodynamic analysis of the carbothermal reduction reaction was carried out by calculating the Gibbs free energy of the reaction to study the effect of mechanical activation of carbon on the reduction temperature of zinc oxide and iron oxide.The results show that carbon with mechanical energy storage not only makes iron oxide And zinc oxide to reduce the temperature significantly reduced, but also to further improve the toner reducing power, reaching the purpose of saving energy and reducing consumption of carbon after mechanical activation of zinc oxide reduction began to reduce the temperature of 185 ° C, hematite began to restore Is mainly due to the lattice distortion energy and surface energy produced by carbon in the mechanical activation process. Among them, the dislocation energy and amorphous property caused by lattice distortion are the main sources of energy storage.