Aluminum Electrolyzer Cathode Steel Rod Window Closure Structure and Construction Method

Abstract

A window sealing structure for cathode steel rods of an aluminum electrolytic cell and a construction method thereof, which are used on the shell of an aluminum electrolytic cell, the side walls of the shell are provided with windows for the steel rods of the cathode carbon block group to pass through, the The sealing structure includes an insulating frame installed between the steel rod and the window, and the insulating frame and the steel rod are sealed by refractory insulating ramming material to form an inner sealing. The outer wall is provided with a support frame, and the support frame partially surrounds the window, and the support frame is provided with a plastic fire-resistant insulating block to block the window, and the plastic fire-resistant insulating block and the insulating frame Fill the bulk material to form an outer block. Through two layers of blockage, the gap between the steel rod and the window can be well sealed at room temperature. At the same time, the plastic refractory insulating block hardens at high temperature, and the bulk material absorbs water vapor. It becomes a blocking material, forming a blocking structure, and can also seal the gap between the steel rod and the window.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to an aluminum electrolytic cell cathode steel rod window sealing structure and a construction method thereof. Background technique [0002] The main equipment produced in the aluminum electrolysis industry is an aluminum electrolysis cell. The aluminum electrolysis cell includes a tank shell. There are multiple windows on the side wall of the tank shell. The cathode carbon block with a steel rod is assembled into the aluminum electrolysis cell. The steel rod at one end is inserted into the window of one side wall of the tank shell, and then the steel rod at the other end is inserted into the window of the opposite side wall. There will inevitably be a gap between the window and the steel rod, and in order to prevent outside air from entering or The gas in the aluminum electrolytic cell leaks out, and the gap must be sealed. A kind of existing sealing structure is to ...

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Problems solved by technology

[0003] However, before the aluminum electrolytic cell is put into use, a high-temperature environment needs to be established. Under high temperature conditions, the steel rod will expand axially, and during the expansion process, the ramming filler will be squeezed out, resulting in the gap being unable to be sealed, and outside air will enter from the gap. The electrolytic cell will oxidize the lining material, which will change its properties and reduce the service life; in such a high-temperature environment and a small space, it is difficult to manually re-sealing; and the use of steel plates is easy to cause steel Short circuit of current between rod and shell

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