DEVICE WITHDRAWING GAS FROM BOTTOM OF SELF-BAKING ANODE Russian patent published in 2015 - IPC C25C3/06 

FIELD: electricity.

SUBSTANCE: in device withdrawing gas from bottom of self-baking anode to the system of arranged gas exhaust made as tubes pressed in the anode body along its longitudinal or transversal axes in one or several rows; tubes for gas withdrawal are placed along the whole anode height, at that in the zone of liquid anode paste height of tubes is equal to 0.25-0.3 of the total height of tubes; in the semi-coke zone tubes are perforated and their height is equal to 0.5-0.6 of the total height of tubes, and in the lower part, in the formed anode zone, tubes are equipped with gas conductive plugs, which height is equal to 0.2-0.25 of the total height of tube. At that gas conductive plugs are made of anode paste placed under the anode pin with content of binding agent (coal tar pitch) of 35-40 wt %.

EFFECT: reduced thickness of gas-containing electrolyte layer, reduced consumption of electric energy by electrolytic cell and increased current-metal yield.

2 cl, 2 dwg