Parallel type synchronous tamping technology for thickener of aluminum cell lining

Abstract

A parallel type synchronous tamping technology for thickener of an aluminum cell lining comprises the following steps that firstly, a thickener tamping area of the cell lining is divided into a cell peripheral thickener tamping area and a cathode carbon block gap thickener tamping area which are two parallel tamping areas; secondly, the two parallel tamping areas are divided into a plurality of fixed tamping working planes according to working area dividing lines, and the tamping work is conducted in each working plane at the same time; thirdly, split tamping is needed in the cell periphery thickener tamping area, and when a combined tamping head conducts compression joint on every two adjacent tamping areas, the requirement for the compression joint width of an overlapping area of every two adjacent tamping areas in the cell peripheral thickener tamping area needs to be met; fourthly, at the tamping joint part of the cell peripheral thickener tamping area and the cathode carbon block gap thickener tamping area, the crossed lap joint tamping is conducted in the manner that the respective tamping ranges of the cell peripheral thickener tamping area and the cathode carbon block gap thickener tamping area need to be exceeded by a certain width; and fifthly, at the joint position of every two adjacent tamping working areas, tamped according to working areas, in the groove periphery thickener tamping area, the tamping width of the mutual crossed lap joint needs to meet the tamping requirement. According to the technology, the tamping quality is guaranteed, and the construction progress is improved.

Description

Technical field: [0001] The invention is applied in the field of electrolytic aluminum production, and particularly relates to a parallel synchronous tamping process for lining paste in an aluminum electrolytic cell. Background technique: [0002] The paste tamping of the lining of the aluminum electrolytic cell is a very critical process in the construction of the electrolytic cell. The circumference of the aluminum electrolytic cell is a planar structure, which needs to be compacted and compacted in multiple layers with paste. There are 20 to 24 cathode carbon blocks at the bottom of the electrolytic cell. The paste between the carbon blocks needs to be filled and compacted in layers to ensure the conductivity and anti-seepage performance of the inner lining structure. The compactness of the paste tamping and the closeness of the bonding between the paste and the carbon block directly determine the production capacity, operation stability and service life of the electroly...

AI Technical Summary

Problems solved by technology

Using this method, it is easy to form defects that the tamping is not in place and the joint is not tight at the joint between the groove circumference and the carbon block

These loose defects in production will cause leakage of molten aluminum and cause serious damage to the structure of the electrolytic cell

[0005] 2. The paste around the tank with a planar structure needs to be tamped in 3 to 5 times, and it is easy to form some point-like or linear quality defects that are not densely tamped at the junction of adjacent tamping tracks.

[0006] 3. The quality defects of local delamination and low interlayer bonding strength are prone to appear between the layers of paste that are layered and tamped, which affects the current efficiency and service life of the electrolytic cell

Flow-type tamping is generally divided into four flow operation areas. Due to the long construction line, the construction time will inevitably be long, which will cause the temperature of the electrolytic tank to drop, and secondary heating is required for temperature compensation. If the flow line is shortened, the flow operation section will inevitably be increased. Increase the number of operators and machines, and correspondingly increase the construction cost

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