SU378524A1 - BURNTED COAL ELECTRODE OF ALUMINUM ELECTROLYZERSv :: ': ..; h': '^. UKJS; -! / 4H \ y ^! -: lt- ^ 1:' Z'mschs ': -; U-j1: -' -Olh - [AI - Google Patents

Description

i

This invention relates to the production of aluminum by electrolysis and the electrolytic refining of aluminum.

The carbon electrode of aluminum electrolysis cells is known, consisting of a carbon block with a ninnel socket and a nipple. Pockets are made in the bin socket, and there is a wire stand on the bottom of the socket. The gap between the nipple and the walls of the nipple socket and the pockets are filled with cast iron.

The purpose of the present invention is to reduce energy losses. This is achieved by the fact that in the body of the coal block, cast-iron rods connected by inclined cast-iron bridges with cast-iron casting are installed around the nipple socket.

Cast iron rods in cross section have an oval shape, in addition, their surface is corrugated. Pig-iron rods can also be tapered.

This reduces power loss by improving the electrical contact of the nipple-coal block.

The drawing shows the proposed calcined carbon electrode containing steel nipple 1, cast iron fill 2, cast iron jumper 3, cast iron rod 4, coal block 5.

In the proposed burned carbon electrode, the improvement of the electrical transition contact nipple - the coal block is achieved by shrinking cast iron jumpers, resulting in cast iron rods with walls facing the nipple nest strongly pressed to the body of the coal block.

The improvement in contact is noticeably manifested especially in the first period of operation of the carbon electrode, i.e., when this resistance is especially great in known designs of carbon electrodes.

The proposed electrode is manufactured as follows.

The body of the coal fired block with a nipple socket and holes for the rod is manufactured at the electrode factory. Holes for jumpers are drilled before casting the nipple with cast iron. The formation of cast iron jumpers and cast iron pads is performed when the nipple socket is cast with cast iron when the electrode is mounted.

Thus, the formation of cast iron bridges and cast iron rods does not create additional labor costs, and the transitional contact improves dramatically.

The work of the burned carbon electrode is as follows.

The initial electrical contact between the steel tube and the body of the coal block is made via a chain of steel nipple-iron casting - cast iron non-scratch - cast iron rod - coal body. As the steel nipple warms up, its dimensions increase, the gap between the cast iron fill and the wall of the nipple socket is eliminated, and in the last period of electrode operation, the electrical circuit is mainly: steel nipple - cast iron - the body of the nipple socket.

The advantage of the proposed fired carbon electrode is that, due to a constructive change in the electrode contact unit, the shrinkage of the cast iron began to improve electrical contact, and unproductive electric power losses in the contact node sharply decreased without increasing the labor and material costs.

Due to the better bonding of the cast iron fill to the carbon body of the electrode, the nipple depth of the nipple can be reduced.

reduce coal waste

which allows for blocks.

Subject invention

Claims (4)

1. Annealed carbon electrode of aluminum electrolysis cells, including a coal block with a nipple socket, a nipple and a cast iron fill, located between the nipple and the nipple walls, revealing that, in order to reduce electric power losses, vertical cast iron are installed in the body of the coal block rods connected by cast iron lintels with cast iron pouring. 2. The charred carbon electrode of claim 1, wherein the cast iron rods in cross section have an oval shape. 3. Annealed carbon electrode according to claim 1, characterized in that the cast iron rods have a corrugated surface. 4. The calcined carbon electrode according to Claim 1, characterized in that the cast iron rods are tapered.