Novel aluminum cell cathode inner lining structure

Abstract

The invention relates to a novel cathode liner structure of an aluminum electrobath. The design proposal of the cathode liner structure is characterized in that a central line of paste between gaps and a central line of a cathode steel bar are assembled in the same vertical line. The proposal improves the utilization rate of a cathode block, reduces the cost of a material for manufacturing a cathode liner of the aluminum electrobath, has simple construction and is convenient and feasible in order to remarkably improve the bonding strength among the cathode block, the cathode steel bar and the paste between the gaps and evenly distribute structural stress. Compared with the prior combination form of the cathode steel bar and the cathode block, the novel cathode liner structure can improve the bonding strength between steel and carbon, strengthen conductivity between the steel and carbon and reduce the voltage drop value of resistance; as a tamping method of a delaminated material composite process is adopted, the novel cathode liner structure improves the anti-leakage performance of the paste between the gaps, thereby prolonging the service life of the cathode liner of the electrobath.

Description

Background technique: [0001] The cathode lining of the aluminum electrolytic cell is the molten pool of the aluminum electrolytic solution and the conductor of the cathode power supply composed of a plurality of cathode carbon blocks and steel rods. It usually consists of cathode carbon block, cathode steel rod, seam paste and steel rod paste as a conductive filling medium between cathode steel rod and cathode carbon block. The cathode steel rod paste used for the cathode carbon block cathode steel rod group of the aluminum electrolytic cell currently in general use the tamping process to assemble the two into a cathode steel rod group, and then use the interstitial paste on the upper part of the anti-leakage material of the aluminum electrolytic cell to ram them Solid combination into a whole cathodic electrolyzer lining. [0002] It mainly has the following disadvantages: 1. The utilization rate of the cathode carbon block after roasting is low. In order to install the cath...

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Problems solved by technology

[0002] It mainly has the following disadvantages: 1. The utilization rate of the cathode carbon block after roasting is low. In order to install the cathode steel rod, it is necessary to open and process two cathode steel rods at the bottom of a cathode carbon block whose section is an overall rectangle after roasting. The rod slot not only reduces the utilization rate of the finished cathode carbon block, but also increases the manufacturing cost of the cathode carbon block

2. The way the cathode steel rod is set is affected by the structural stress of a rectangular cathode carbon block section

In addition, the construction technology of the tamping paste between the cathode steel rod and the cathode carbon block is limited, and the steel-carbon contact pressure drop here is high, so it is difficult to design the best conductive effect

3. The cathode lining of the whole aluminum electrolytic cell is formed by tamping the common cathode carbon block group with interstitial paste, the pressure drop at the bottom of the cell is high, and the aluminum electrolysis consumes more power

4. Due to the limitations of the cross-sectional structure of the cathode carbon block, the tamping connection material, and the cross-section of the cathode steel rod, the current general-purpose aluminum electrolytic cell is not only complicated in construction technology, but also has a short service life of the cathode lining

5. The design of the existing cathode electrolytic cell lining is difficult to make an innovative design for the electrolytic cell cathode lining structure due to the influence of the above-mentioned cathode carbon block section size and the current general structure

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