燃气焙烧启动技术在石墨化阴极电解槽的工业应用与分析

燃气焙烧启动技术和石墨化阴极技术是当前电解铝企业面对国家阶梯电价政策要求下全面降低电能消耗的首选技术。通过分析燃气焙烧启动技术优势和石墨化阴极特性，指出了石墨化阴极电解槽采用燃气焙烧时需要提高焙烧温度、调整升温策略和延长焙烧时间等技术措施，并在2台400 kA电解槽上进行了工业应用，达到了启动后无渗漏现象，在平稳运行6个月的时间内，炉底压降可以稳定保持在185 mV以下，吨铝直流电耗为12 269 kWh,达到了行业较好水平。

Industrial Application and Analysis of Gas Roasting Starting Technology in Aluminum Electrolysis Cell with Graphitized Cathode

The gas roasting starting technology and graphitized cathode technology are the preferred technologies for aluminum electrolysis smelter to comprehensively reduce power consumption under the requirements of the national tiered electricity price policy. By analyzing the advantages of gas roasting starting technology and the characteristics of graphitized cathode technology, the technical measures such as improving roasting temperature, adjusting heating strategy, and prolonging roasting time when electrolysis cell using the graphitized cathode technology roasted with gas were pointed out, and industrial application was carried out on two 400 kA electrolysis cells which has no leakage after starting. During the period of six months of stable operation, the cell bottom voltage drop can be kept 185 mV below, the DC power consumption for per tonnage aluminum is 12 269 kWh, which reaching a good level in the industry.