碳热氯化法分解富硼渣的可行性研究

Study on Feasibility of Decomposition of Boron-rich Slag by Carbonchlorination Reaction

富硼渣是硼铁矿高炉铁硼分离生产含硼生铁时得到的一种含硼、镁的重要产品。富硼渣的综合利用工艺研究是高炉直接冶炼硼铁矿能否工业化的关键,也是硼铁矿资源能否合理开发利用的关键。本文提出了一种富硼渣综合利用的新方法—富硼渣碳热氯化反应法,计算了富硼渣碳热氯化反应的标准摩尔反应吉布斯函数,应用热力学方法分析了富硼渣碳热氯化反应的可能性,得到反应进行所需要的热力学条件,富硼渣中各组分的氯化反应能力为3MgO.B2O3>2MgO.B2O3》2MgO.S iO2>2CaO.Al2O3.SiO2。

The boron-rich slag is an important product with rich boron and magnesium. It is produced from ludwigite by blast furnace separating to make into pig iron containing boron. The process research of the boron-rich slag is the key which affects the industrialization of blast furnace separating and the reasonable development and utilization of ludwigite. The new method of comprehensive utilization of boron-rich slag was proposed, that is, carbonchlorination decomposition reaction method. Standard free energy changes of boron-rich slag carbonchlorination reaction were calculated. The feasibility of boron-rich slag carbonchlorination process was analyzed by thermodynamics, then, the thermodynamic conditions were gained. The carbonchlorinational ability of different components in the boron-rich slag was：3MgO·B2O3 〉2MgO·B2O3≥2MgO·SiO2 〉2CaO·Al2O3·SiO2.