Apparatus for collecting and removing gases from aluminium reduction tanks

A gas collection and gas technology, applied in the field of non-ferrous metallurgy, can solve problems such as inability to ensure the removal of electrolytic gas

Active Publication Date: 2022-07-05
OBSHCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU OBEDINENNAYA KOMPANIYA RUSAL INZHENERNO TEKHNOLOGICHESKIY TSENTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Therefore, prior art devices do not ensure effective removal of electrolyzed gases both between and during normal operation of the reduction tank operation

Method used

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  • Apparatus for collecting and removing gases from aluminium reduction tanks
  • Apparatus for collecting and removing gases from aluminium reduction tanks
  • Apparatus for collecting and removing gases from aluminium reduction tanks

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Embodiment Construction

[0040] A device for collecting and removing gas is installed in the reduction tank. A reduction tank is a device that produces aluminum by reducing the melt, and typically includes an anode, a point alumina feeder with a crusher, a collector beam with gas conduits and gas caps, and a hood. All structural elements of the claimed device are fastened to the collector beam 1 . The cover of the reduction tank 2 is made of a separate cover, inside which the guide element 3 is mounted firmly horizontally with respect to the electrolyte housing of the melt. The guide elements can be structured in plates or protrusions ( Figure 4 and Figure 5 ), the plate or protrusion is made of the material used to make the cover, such as aluminium. The number of guide elements is determined by the velocity of the flow between the guides and needs to be ensured that the gas flow velocity is higher than 2m / s and lower than 7m / s in order to exclude the gas escaping from the reduction tank and carr...

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PUM

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Abstract

The present invention relates to the production of aluminium in reduction tanks with fired anodes. An apparatus includes a gas piping system and a gas collection cap. Each of the caps is connected by a first channel to a horizontal gas conduit to form a main degassing circuit, and is connected to an additional gas conduit by a second passage to form an additional degassing circuit. The height of each subsequent channel of the main loop is increased by 16% to 24% of the height of the previous channel, and the height of each subsequent channel of the additional loop is increased by 24% to 26% of the height of the previous channel. A divider plate is installed inside the cap. The length of each subsequent plate is reduced by 25% to 35% relative to the previous plate. The technical effect is to reduce the amount of gas removed from the reduction tank and maintain the degassing efficiency.

Description

technical field [0001] The present invention relates to non-ferrous metallurgy, and in particular to the production of aluminum in reduction tanks with prebaked anodes, and can be used to reduce the amount of gas removed from the reduction tank while at the High removal efficiency is maintained between operations and during regular operations. Background technique [0002] A device is known in which a plenum cap is in contact with the casing at the casing opening. The purpose of this invention is to collect the waste gas from the reduction tank in order to remove the waste gas from the aluminium fluorine compound (Patent US 4,770,752,1988). [0003] Disadvantages of the known device include the limitations of the described invention related to maintenance of the alumina feed system located within the cap and possible damage during anode replacement due to the location of the cap close to the anode and housing. [0004] An arrangement is known in which a standard amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/22
CPCC25C3/22
Inventor V·G·沙德林Y·A·特蕾特雅科夫A·S·热尔杰夫
Owner OBSHCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU OBEDINENNAYA KOMPANIYA RUSAL INZHENERNO TEKHNOLOGICHESKIY TSENTR
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