Chongqing Qi can successfully realize the online reaming of the column bus

In order to reduce the hidden safety risk of the electrolytic cell due to the damage of the insulating sleeve and minimize the waste of critical time during the emergency rescue operation of the short circuit port, Chongqing Energy Qineng Electric Aluminum Co., Ltd. successfully achieved the column bus online Reaming provides valuable experience for the online construction of busbars in electrolytic aluminum enterprises.

Since Chongqing Cuneng 420kA series electrolytic cells were put into production in 2013, the longest cell age is more than 2100 days. However, due to different frequency of power outage, power limitation, and start and stop operations during the electrolytic production process, some short circuit bus bars of the electrolytic cells are affected by their own weight When the downward movement occurs, the insulating sleeve is cut, and the bolt holes that are originally at the same level as the column bus bar are misaligned, which makes it extremely difficult to remove the insulating screw. After replacing the new insulating sleeve, the hole cannot be reset due to the misalignment of the hole.

To this end, Qineng Company and Chongqing Youjia Pump Co., Ltd., after a five-month field investigation, plan formulation, construction design, equipment commissioning, online and offline testing, safety accident deduction and safety assurance measures, to overcome the strong magnetic field, The impact of the high-temperature production environment has solved many problems such as the selection of insulation materials for mechanical equipment, the precise positioning of reamers and brackets, the control of travel speed, and the precise limit, and the premise of adding 5 insulation protections to the equipment The use of compressed air as the power has successfully solved the potential insulation safety hazards caused by AC and DC currents. The diameter of the insulation bolt hole of the short circuit of an electrolytic cell of Qineng Company has been expanded from 45mm to 60mm online, and The screw perforation has no jamming, which lays a solid foundation for saving the most critical short-circuit port operation time in the later emergency rescue process of short-circuit ports.