大功率密闭直流电弧炉钛渣冶炼产品质量控制体系研究

Study on quality control system during titanium slag smelting in high power closed direct current arc furnaces

以大功率密闭直流电弧炉(简称HPDC炉)冶炼钛渣为基础,根据不同地区钛矿成分的差别,以及产品供销需求,建立钛渣冶炼产品质量控制体系,对生产制度进行及时调整,以适应下游钛工业生产过程中不同工艺条件下生产需求的不同。在2023K的高温下,考虑主要的还原反应,HPDC炉冶炼钛渣可人为调节的控制因素是配碳比(AIP,Percentage of anthracite to ilmenite mass)和HPDC炉输入功率。HPDC炉试生产期间,产品钛渣中TiO2和FeO的含量均随着AIP的增加而下降,当AIP为12.243%时,钛渣中TiO2含量达到最高。生产中要根据不同的目标产品成分,制定合理的生产制度、加料制度和HPDC炉功率制度,实现产品质量最优化控制。HPDC炉生产钛渣是个动态的平衡过程,生产过程中必须综合考虑产品FeO含量和排渣要求。

On the basis of different titanium ore compositions and demands of supply and marketing of titanium product, quality control system during titanium slag smelting in high power closed direct current arc furnaces （HPDC furnace for short） should be set up to adjust production system so as to fit for downstream titanium industrial production. The two factors that were percentage of anthracite to ilmenite mass （ AIP for short） and input power of the furnace could control the smelting under the temperature of 2023K in the furnace artificially. The contents of TiO2 and FeO would fall by AIP increasing. TiO2 content would reach highest level when AlP were 12.24%. In order to achieve optimization control strategy, it must establish rational production system, raw material charging system, and input power system of DC furnace based on demands of objective contents. In short, it was a dynamic balance process that should be considered by conditions of FeO content in titanium slag and discharging.