| 摘要 |
<p>This disclosure concerns the production of metal, in particular aluminum, by providing an electrolytic bath containing dissolved oxide of the metal to be produced in a reduction cell. A direct current flows through the bath and metal is collected on the bottom of the reduction cell. The invention includes a method and apparatus for determining the undesirable process generated noise component of the resistance in the reduction cell and, preferably, reducing or eliminating the noise component whenever it exceeds a given level. More particularly, a circuit arrangement is operatively arranged to sense the process generated noise component and produce an output signal whenever this component exceeds a given level indicating the existence of a noise level which is detrimental to efficient cell operation.</p> |
