SU200768A1 - LIGHTING OF ONBOARD PART OF ALUMINUM ELECTROLYZER - Google Patents

Description

A known aluminum electrolysis cell, in which the thermal insulation, depending on the heat release in each individual section, is made of a variable cross section at the height and perimeter of the electrolyzer shaft.

The peculiarity of the described lining lies in the fact that it is made but the thickness is two-fold. At the same time, the inner row is a graphite plate, which is a height of the ILO, and the outer row consists of two parts; the bottom one is made of diatomite brick, and the top one is made of graphite blocks or by feeding mass. This provides a differentiated heat removal and improves the technological performance of aluminum electrolysis.

Pa the drawing shows the cathode part of the aluminum electrolysis cell (in cross section) with the described side lining.

Bortova () ugovka in Bejixneii part of the baths

consists of two coal plates I (2 TOLSH, OTHER

on 115ls. The inner plate / is mounted on a shaft of brick 3. The outer plate 2 is much shorter than the inner one, and its height (20-30 cm) is chosen so that the lower part of this plate is slightly below the boundary 4 between the metal and the electrolyte. Below this slab is a series of insulating bricks 5 (diatomite or lightweight). Between the slab 2. And the cathode casing 6, a thin layer of leveling refractory Hoi 7 backfill 7 is applied, which protects the casing from strong heating.

Instead of the coal slab 2 and backfill 7, it is possible to use a continuous heel from the bottom mass, as well as other good heat-conducting materials.

Cap iS; The cell is made in the usual way. To shield 3) Blums 9 from the penetration of molten aluminum to them, they are buried with fireclay bricks 10.

The described side lining makes it possible to increase thermally the thermal insulation and, at the same time, reduce the side of the bath, reduce the temperature of the electrolyte. Since the thermal resistance of the side lining and the electrolyte zone remains at a moderate level or even slightly decreases, the electrolyte temperature in the upper zone of the wall walls of the hinge line increases when there is a decrease in electrolyte temperature, which increases the lateral resistance the walls of the vaina and the reduction of the incidence of contacting of the soldering metal and liquid electrolyte, reduce the amount of metal and increase the current output. The advantage of such a lining is also in that. which is about 25% less consumption of side coal 1PLT. U | 1СЛМЧСИИе ТСИЛии.: 1.1ЯTIatsii lower part of the board (; lnny diotsh gktg ;:

without increasing the thickness of the side lining and, therefore, without reducing the distance from the anode to the bead. At the same time, the resistance of the side lining is not reduced, since the thickness of the coal lining in the electrolyte zone (the weakest point) does not decrease, and the formation conditions in this zone improve.

In order to improve the conditions of formation, the beds at the ends of the bath are usually lined with one or two rows of plates of the same height with a minimum thermal insulation between the blocks and the cathode jacket.

Subject of inventions

The lining of the side part of the aluminum electrolysis cell, made of refractory teloizol material, with different thermal and optical properties, is due to the fact that, in order to diffuse heat and improve the electrolysis performance of aluminum, otia was made thicker, two-dimensional, and 1 double. the solid height of the graphite plate, the upper row in the lower Svoey part is laid out of diatomite brick, and in the upper part - of graphite blocks IL1N of iodine mass.

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