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Oxygen monitoring and instantaneous current efficiency measurement method for inert aluminum electrolysis cell

A measurement method, technology of aluminum electrolytic cell, applied in the field of aluminum electrolysis

Active Publication Date: 2012-12-12
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

Since inert aluminum cells produce oxygen during the electrolysis process, it is possible to extrapolate and measure the current efficiency of the cell by monitoring oxygen

Method used

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Embodiment Construction

[0021] The method for oxygen monitoring and instantaneous current efficiency determination of an inert aluminum electrolytic cell of the present invention comprises the following steps: measuring flue gas temperature, flow velocity, pressure and oxygen concentration data through a monitoring system installed on the flue gas pipeline of an inert electrolytic cell, and all monitored After the data is sent to the data processor, the oxygen discharge of the electrolyzer is calculated, and the current efficiency is calculated by combining the series of currents collected. The calculation method of oxygen discharge is to calculate the volume of oxygen discharged within a specified time according to the temperature, pressure, flow rate and oxygen concentration of the flue gas measured by the monitoring system, as well as the pipe diameter of the flue gas pipeline and the specified time. According to the ideal gas state equation P 0 V 0 T 0 =P 1 V 1 T 1 Then convert to the volume...

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Abstract

The invention discloses an oxygen monitoring and instantaneous current efficiency measurement method for an inert aluminum electrolysis cell. The measurement method comprises the following steps of: measuring smoke temperature, flow rate, pressure and oxygen concentration via a monitoring system installed on a smoke pipeline of the inert aluminum electrolysis cell, sending the monitored data into a data processor, calculating the oxygen emission of the electrolysis cell, and calculating current efficiency through the combination of collected series of currents. The invention provides an oxygen concentration measurement and current efficiency prediction method for the production of the inert aluminum electrolysis cell, which can be used for acquiring the real-time running state of the inert aluminum electrolysis cell, controlling the content of aluminum oxide as needed and controlling the stability of the concentration of aluminum oxide for a control system; and production and use of the inert aluminum electrolysis cell are guided through the comparison between the amount of oxygen produced via the inert aluminum electrolysis cell and a theoretical amount of aluminum, which is beneficial to precise control and management of the production of the inert aluminum electrolysis cell.

Description

technical field [0001] The invention belongs to the field of aluminum electrolysis, in particular to a method for detecting oxygen generated in an inert aluminum electrolytic cell process and measuring current efficiency. Background technique [0002] The difference between the inert aluminum electrolytic cell and the electrolytic cell widely used in the production of primary aluminum is that the inert electrolytic cell no longer uses the carbon anode used in the current cell for electrolytic production, and replaces it with an inert anode, including metal inert anodes, ceramic inert anodes, Metal-ceramic inert anodes, etc. Inert anodes are different from carbon anodes participating in the electrolysis reaction, but basically do not participate in the electrolysis reaction. Therefore, during the production process, the inert electrode releases oxygen instead of carbon dioxide while producing aluminum. [0003] Conventional electrolyzer reaction 2Al 2 o 3 + 3C = 4Al + 3CO ...

Claims

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Application Information

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IPC IPC(8): C25C3/20
Inventor 杨建红张艳芳黄钦佩王跃勇唐新平
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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