Method for controlling an alumina feed to electrolytic cells for producing aluminum
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 12, 2019
Grant Date -
May 25, 2017
app pub date -
Jun 19, 2014
filing date -
Jun 19, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to nonferrous metallurgy and may be suitable for controlling the feed of alumina to electrolytic cells for producing aluminum to maintain the alumina concentration in the electrolytic melt equal or close to the saturation value. To maintain the alumina concentration within the set range, reduced voltage U or pseudo-resistance R is measured and recorded at fixed time intervals. Underfeeding or overfeeding phases occur compared to a theoretical alumina feeding rate during electrolysis, wherein the duration of underfeeding phases is based on the alumina concentration in the electrolytic melt, and the duration of overfeeding phases is based on the change of one or more electrolytic cell parameters being recorded: reduced voltage, U, pseudo-resistance, R, rates of reduced voltage, dU/dt, pseudo-resistance, dR/dt, change. Adjustments to the anode-cathode distance to maintain the electrolytic cell energy balance may be performed during any of the feeding phases.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully