SU565952A1 - Gas-collecting bell for an aluminium-producing electrolyzer - Google Patents

Description

(54) GAS ASSEMBLY BELL OF ELECTROLYZER FOR RECEIVING ALUMINUM

The invention relates to the field of electropically producing aluminum from molten media and is aimed at improving the anode device of a electrolyzer with a self-extracting anode.

The gas collecting bell of the electrolysis cell for producing aluminum, made of sections, the vertical walls of which have a hook for hanging on the rigidity of the anode casing, and the ends of which are provided with connecting tides, is known. The joints are sealed using asbestos cardboard gaskets with magnetic material or mastic, including magnetic material, salt and liquid glass, J Lo.

This structure has a short service life due to burnout of gaskets and mastic on you. Ke sections and a low coefficient of useful action of bVI, equal to 45-55%, are laborious in assembly, disassembly and maintenance. It requires the restoration of compaction during the operation of an electric lier and labor costs for the preparation of ice or mastic proc.25

The low efficiencies of the known gas collection bells lead to the pollution of the atmosphere of the hulls and the environment by fluoride compounds, resinous shoulder straps, carbon monoxide, etc., above the permissible sanitary norms.

The aim of the invention is to improve i sealing between sections.

This is achieved by the fact that the connecting tides are made with grooves forming cavities at the joints of sections, in which the inserts with a layer of sealing powder are placed, and from the bottom are covered with L-shaped plates, the vertical wall of which is located along the walls of the sections.

The walls of the tide grooves, facing to the se stiffness of the anode casing, are made with a height lower than the height of the outer walls.

Claims (2)

Sealing joints between sections with the help of inserts placed in cavities and. covered with powder, improves their tightness and facilitates its maintenance during operation, simplifies the docking of the sections and their replacement. The priming of the L-shaped plates allows to reliably seal the joints between the sections under the stiffness using the same method: the same means - filling the sealing gap. To facilitate the penetration of the sealing powder into the horizontal gap between the rigidity shaft and the shelf of the section 1, the sections of the joints located below the rigidity wall of the grooves in the junction tides, facing the rigidity, have a lower height than the outer ones. In order to reliably overlap the joints, the part of the liner located in the cavity is made in the form of a sheet bent in the shape of the walls of the cavity parallel to the rigidity. In addition, liners have a bend that envelops the vertical wall of the section and is included in the gap between the vertical section of the L-shaped plate and stiffness. Alumina or magnesia is used as a sealing powder. Fig, 1 shows a part of the proposed gas collection bell in the plan | in fig. 2 - bell, cut. The bell covers the bottom of the ano. Yes, along its perimeter it contains sections 1, the connecting tides 2 of which are made with grooves 3s in the openings on the joints of the cavity sections, open at the top. An insert 4 made of a sheet is placed in each of the indicated cavities, along the width of the corresponding or somewhat smaller width of the strip, bent by the shape of the cavity walls parallel to the stiffness 5. At one end the liner has a bend 6 that overlaps the joint over the vertical wall 7 and between the vertical section 8 of the L-shaped plate 9 and stiffness 5. The gaps between the sections, located under the stiffening strip, are blocked by the G-shaped plate 9, the vertical part of which is adjacent to the vertical wall of the section. The cavity space on top of the PCP (breathing and the gaps between the L-shaped plate and stiffness bag are filled with hermetic powder 10. The choice of powder material is determined by the requirements of its availability, limited flowability, resistance to anode gases, harmlessness to electrolysis technology, and quality aluminum, corrosion inertness in relation to steel and cast iron - materials for ®, liners and sections. Its widespread presence in the conditions of the electrolysis case is also desirable. Alumina and powdered magnesium oxide. Assembling such a bell is reduced to hanging sections, installing L-shaped plates and liners and backfilling sealing powder. Maintaining tightness also requires powder filling. The proposed design of the bell eliminates the need for materials for the production of sealing gaskets and the need for installation and dismantling the wedge joint of the docking tides, significantly improves the tightness of the bell, reducing the amount of hazards in the atmosphere of the hull and Avoda. The destruction of the bell from horizontal deformations of the lower part of the anode is prevented. Claim 1. Gas collecting: electrolysis cell bell for producing aluminum, made of sections, the vertical walls of which have a hook for hanging anode casing on the side of the body and the ends are provided with connecting tides, characterized in that, in order to improve sealing of the joints between sections , the connecting tides are made with grooves forming at the joints of the floor sections:; those in which the liners are placed with a layer of sealing powder are covered with G. plates from the bottom, the vertical wall of which is located ene along the wall sections. 2. A bell according to claim 1, characterized in that the walls of the tide slots converted to the severity of the anode case are made with a height less than the height of the outer walls.