Aluminum Rod 6100F Bimetalic Transition Joint Cast Steel Anode Yoke Welded Anode Assembly

Aluminum Rod shall be either cast or extruded, made of Extruded Aluminum Alloy 6101F or 6063F;

Cast Steel Anode Yoke

• Low carbon Steel, Grade GS20 OR A20, 1008.

• Composition: C max 0.2%, Si max 0.4-0.7%, Mn max 0.5-0.7%, P max 0.03%, S max 0.03% ;

• Normalize heat treatment, Surface Treatment R12.5

Transition Joint (TJ)

• bonded aluminum-steel bimetallic clad blcok.

• bonded aluminium-titanium-steel trimetallic clad block.

The grads and layer thickness of te metal layers shall be

No matter what type of clad is used, the guaranteed maximum operationg temperature of the clad has to be 250 or hight.

1. Aluminum Rod: The aluminum rod serves as the electrical conductor in the anode assembly. It is responsible for carrying the electrical current from the power source to the anode carbon block. The aluminum rod is typically made of high-purity aluminum to ensure good electrical conductivity.
2. Steel Yoke: The steel yoke provides mechanical support and stability to the anode assembly. It is designed to hold the anode carbon block in place and withstand the forces generated during the aluminum smelting process. The steel yoke is usually made of high-strength steel to ensure durability and reliability.
3. Anode Carbon Block: The anode carbon block is the main component of the anode assembly. It is made of carbonaceous material and is responsible for reacting with the oxygen in the alumina to produce carbon dioxide. The anode carbon block gradually wears down over time and needs to be replaced periodically.
4. Welding Joints: The welding joints between the aluminum rod and the steel yoke are crucial for ensuring a reliable electrical connection and mechanical stability. The welding process must be carefully controlled to ensure high-quality welds that can withstand the harsh conditions of the aluminum smelting process.

II. Function of the Anode Assembly

The anode assembly in the potroom reduction cell plays a vital role in the aluminum smelting process. Here are its main functions:

1. Electrical Conduction: The aluminum rod conducts electrical current from the power source to the anode carbon block. The electrical current passes through the electrolyte bath and causes the alumina to dissociate into aluminum and oxygen. The oxygen then reacts with the anode carbon block, producing carbon dioxide.
2. Mechanical Support: The steel yoke provides mechanical support to the anode carbon block, ensuring that it remains in place during the aluminum smelting process. The yoke also helps to distribute the weight of the anode assembly evenly and prevent it from sagging or collapsing.
3. Heat Dissipation: The anode assembly generates a significant amount of heat during the aluminum smelting process. The steel yoke and the aluminum rod help to dissipate this heat, preventing overheating and damage to the anode assembly.
4. Gas Evolution: As the anode carbon block reacts with the oxygen in the alumina, carbon dioxide gas is evolved. The anode assembly is designed to allow for the efficient removal of this gas from the reduction cell, preventing the build-up of pressure and ensuring safe operation.

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