钛铁矿熔炼过程中DC炉内挂渣层厚度控制的研究

Research of Thickness Control of Freeze Lining During Titanium Slag Smelting in DC Arc Furnace

分析了炉内的工艺温度和渣中MgO的含量随加热时间的变化特征．结果表明DC炉内挂渣层厚度主要与炉内的工艺温度和渣中MgO的含量有关．整个实验过程的工艺温度控制在1700～1750℃范围内，渣中MgO质量含量控制到小于1．8％时，可有效避免炉壁烧穿．随工艺温度的增加，渣中MgO质量含量增加，挂渣层减薄．研究熔炼过程中DC炉内挂渣层厚度变化对熔炼工艺的稳定控制和生产效率的提高具有重要的意义．

The thickness of freeze lining determines the stability of the titanium slag smelting process in DC arc furnace. The variation of processing temperature and MgO content with heating time are analyzed. Results show that the processing temperature of the furnace and the MgO content have a significant effect on the thickness of freeze lining during titanium slag smelting in DC arc furnace. When the experiment processing temperature is controlled in the range of 1 700 - 1 750 ℃, and MgO content in slag controlled less than 1.8 %, the accident of DC furnace burnthrough can be avoided effectively. With the rise of processing temperature, MgO content in slag increases, and the thickness of freeze lining decreases. Studies on the thickness control of freeze lining during ti- tanium slag smelting in DC arc furnace can help better control the smelting process and improve the production efficiency.