| 摘要 |
Disclosed is a direct-current shunt preheating start method for an inert electrode aluminum electrolysis cell, comprising: (1) forming multiple direct-current shunt element groups by using conductors with preset resistance values and geometric sizes; (2) laying in a hearth of the electrolysis cell electrical heating element groups of the same number as/a different number from electrode groups; (3) drying the hearth, smelting electrolyte, and establishing a thermal balance and a hearth model by using the electrical heating element groups and according to a set heating curve or set steps; (4) changing the number of groups of/a series or parallel state of the direct-current shunt elements; and (5) gradually replacing inert electrodes, and gradually adjusting the number of the groups of/the series or parallel state of the shunt elements. By means of the present invention, the inert electrode aluminum electrolysis cell can be well preheated and the thermal balance can be established; in the inert electrode replacement process, stability of the cell voltage can further be ensured, so that the current passing through the inert electrodes in the cell is uniform; and series current is not affected by start of a single electrolysis cell, so that non-disturbance start is implemented. |
