Aluminum production process control

Patent No. 8,052,859

Issued: November 8, 2011
Filed: December 18, 2007
PCT Filed: December 18, 2007
PCT No.: PCT/US2007/087883
371(c)(1),(2),(4) Date: May 20, 2009
PCT Pub. No.: WO2008/077016
PCT Pub. Date: June 26, 2008

Schneller; Michael (Istanbul, TR)

The method of process control is for a Hall-Heroult process of aluminum production from alumina ore in an industrial potline. The method includes measuring an array of sampled potline data including a plurality of cell voltages (V) and a plurality of line amperages (A) at a plurality of time points. The method also includes calculating a predicted voltage (PV) for each cell voltage and line amperage in the array. The method further includes controlling a plurality of alumina ore feed rates and a plurality of pot voltage settings based upon the predicted voltages. The method also includes calculating a plurality of bath temperatures based upon the predicted voltages. The PV variable is preferably used in an automated control environment. The PV variable is also preferably used to monitor cell noise levels, operating temperature, metal pad roll, and oscillatory electrical shorting events.

Reference to Related Applications

This application claims one or more inventions which were disclosed in Provisional Application No. 60/870,708, filed Dec. 19, 2006, entitled "ALUMINUM PRODUCTION PROCESS CONTROL". The benefit under 35 USC .sctn.119(e) of the United States provisional application is hereby claimed, and the aforementioned application is hereby incorporated herein by reference.

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