Professional CCM

Structure and Working Principle of Pressure Ring

► The pressure ring presses the copper shoes to grip the electrode tightly, ensuring current passes uniformly through the copper shoes into the electrode and then into the furnace.
► The pressure ring consists of two semi-circular rings. Its internal water cooling circuit is highly complex. Cooling water first enters the lower chamber, circulates upward through the narrow outer cooling channel, then flows into the inner ring channel (which is relatively wider), and finally exits. The flame-facing section of the pressure ring achieves excellent cooling performance, significantly extending its service life.
► The key feature of the bellows-type pressure ring is that its conductive component is the copper shoe. The axial force generated by the bellows ensures tight contact between the copper shoe and electrode, enabling uniform current transfer for electrode baking and smelting.

Material

► Stainless steel
► Copper: New modular copper bellows pressure ring

1. High thermal conductivity of copper enhances cooling efficiency. Eliminates eddy currents, preventing heat generation and reducing electrical energy loss.

2. Modular design with compact, lightweight units allows individual replacement of damaged parts, drastically lowering maintenance costs.

3. Forging process eliminates welding stress.

4. Overcomes limitations of traditional pressure rings in manufacturing and material selection.

II. Key Functions of Pressure Ring

1. Ensures Stable Conductivity

► By pressing the copper shoes, the pressure ring maintains consistent contact between shoes and electrode, minimizing contact resistance and ensuring stable/efficient current transmission. This is critical for submerged arc furnaces and industrial silicon furnaces, as stable current is essential for proper chemical reactions.
► Example: In silicon production, stable current ensures complete reduction reactions, improving product quality and yield.

2. Extends Equipment Lifespan

► Reduces friction/wear between copper shoes and electrodes. Without the pressure ring’s clamping force, thermal expansion and mechanical vibrations would cause unstable contact, accelerating wear. The pressure ring distributes electrode pressure evenly across copper shoes, preventing localized stress damage and enhancing reliability/durability.

3. Boosts Production Efficiency

► Stable conductivity + extended equipment life enable continuous, high-efficiency furnace operation. Minimizes downtime caused by poor conductivity or failures, improving productivity.
► Additionally, the pressure ring’s performance reduces maintenance costs and energy consumption, increasing economic benefits.

Advantages of Pressure Ring

1. Precise Pressure Control

► Modern pressure rings employ advanced design/manufacturing to enable precise pressure adjustment. Operators can optimize conductivity by adjusting pressure based on electrode conditions or production needs.
► Example: Increase pressure for severely worn electrodes or intense furnace reactions; reduce pressure during electrode replacement/maintenance.

2. Excellent Adaptability

► Compatible with various submerged arc furnaces, silicon furnaces, and other equipment, supporting diverse electrode/copper shoe sizes and shapes. Widely applicable across industrial scenarios.
► Customizable designs available for special production requirements.

3. Reliable Performance

► Rigorously tested for high reliability/stability. Withstands harsh conditions (high temp/pressure, corrosion) during prolonged operation.
► Low-maintenance: Only regular pressure checks/adjustments needed.

Conclusion

The pressure ring is indispensable in submerged arc furnaces and industrial silicon furnaces. By pressing copper shoes, it ensures stable conductivity, extends equipment life, and enhances productivity. Its precise pressure control, adaptability, and reliability make it a vital component in modern industrial production.