SU1258883A2 - Electrolyzer for producing aluminium - Google Patents

Description

The invention relates to the production of aluminum by an electrolytic method and is an improvement of the device according to the authors. St. No. 899723.

The purpose of the invention is to improve the uniformity of loading of alumina.

SUMMARY OF THE INVENTION The principle of the invention is that, in an electrolytic cell for producing aluminum, an edge with tufts of elastic elements on longitudinal edges is additionally installed on the pushing beam of the electrolyte crust destruction mechanism along the longitudinal axis.

FIG. 1 shows a cell with a self-firing anode and upper current lead, general view; in fig. 2 is a section A-A in FIG. one; in FIG. 3, node I in FIG. 1 (scheme of operation of the device).

The device contains vertically moving beams 1 of the crust of electrolyte crust 2 and bunkers 3 with a hole 4 for discharging alumina, resting the bottom on pushing the beam 1 and mounted with adjustable vertical movement on the suspensions 5. Moving the bunker down is adjusted by the lowering limiter 6 To prevent alumina from hanging In the bunker on the bursting beam along its longitudinal axis, perpendicular to the larger base, the rib 7 is rigidly fixed with tufts 8 of elastic wire. The lower base of the rib 7 in cross section II is equal to the width of Outlet 4 of the hopper 3, and the height of the rib is equal to the course of movement of the pushing beam 1 down.

Bundles 8 of elastic elements can be made, for example, from loose steel wire cords with a diameter of 2.5-5 mm and caulked into holes drilled in the rib at a distance of 1 / 2-3 / 4 of the height of the conical part of the bunker , since the maximum thickness of the layer of alumina compacted on the inner surface of the conical part of the bunker is located at a distance of 1 / 2-3 / 4 of the height of the conical part of the bunker from the outlet hole.

The device works as follows.

Periodically according to the regulations of the process electrolysis

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on the electrolyzer, the crust of the electrolyte is crushed by the pushing beams 1 of mechanism 2 in order to introduce another portion of alumina into the electrolyzer. In the initial position, the thrusting beam I is in the upper position and the lower base of the rib 7 blocks the outlet 4 of the hopper 3.

When moving the pressing beam 1 down, the bunker 2 with alumina rushes after it until it freezes on the adjustable lower limiter 6. At this time, the push beam continues to descend, leading the lower base of the rib out of the hole 4 and partially opening it. At the same time, when the beam is lowered, the rib 7 loosens the alumina arch Q and, by bundles 8 of elastic wire, cuts a layer of compressed alumina from the inner surface of the conical part (chute) of the bunker, which impedes its outflow from the bunker. Alumina begins to glaze freely through the hole 4 in the bottom of the bunker to the surface of the electrolyte peel. The pressure beam 1, reaching the surface of the electrolyte peel, destroys it. At the same time, the edge 7 emerges from the hole in the bottom of the bunker and fully opens its flow area. Along with this, the alumina flowing out of the bunker, together with the pieces of the destroyed electrolyte peel, enters the electrolyte.

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Climbing up, the bursting beam I with rib 7 reaches the hole in the bottom of the bunker and, with a further rise by the bottom base of the rib, completely covers it. Continuing to rise upward, the pushing beam 1 raises the hopper 3, which is movably fixed by means of the suspensions 5, to the upper initial position and stops.

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FIG. 3 is the value of the C-displacement of the bunker, and the value of D-movement of the pushing beam.

The proposed design of the electrolytic cell, in comparison with the known, provides a constant consumption of alumina corresponding to the time of the hopper hang-up and thus improves the uniformity of loading of alumina.

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Compiled by N. Chernykh Editor A. Kozoriz Tehred L. Serdyukova Proofreader A. Tsko

Order 5091/28 Circulation 615 Subscription VNIIPI USSR State Committee

for inventions and discoveries I13035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Phys.d

Claims (1)

ELECTROLYZER FOR PRODUCING ALUMINUM by ed. St. No. 899723, characterized in that, in order to increase the uniformity of loading of alumina, it is additionally equipped with a rib with bundles of elastic elements mounted on a pushing beam along its longitudinal axis perpendicular to the base facing the hopper opening. Fig. 1 m