THE QUICK SHUT DOWN AND RESTARTING OF 291 kA PRE-BAKED POTLINE AT JSC 'RUSAL SA-YANOGORSK? FROM MAY TO AUGUST 2011

摘要

Sayanogorsk and Khakas aluminum smelters faced with the serious risk of emergency shut down due to the railway bridge destruction used for the raw materials supplying, after the natural disaster on May 7, 2011. In order to prevent the emergency shutdown UC "RUSAL" decided to reduce temporarily the production volume. As a result, the line amperage was decreased significantly; some amounts of old and sick pots were shunted out in each potline, besides the entire line consisting of 179 pots with a current of 291 kA was disconnected within 2 days. After the resumption of raw materials supply the potline was restarted within 2.5 months. This article describes the sequence of events from the decision to shut down the line to the full production recovery.