SAF Water Cooled Protective Cover Used For Submerged / Electric Arc Furnace
Basic Properties
Trading Properties
Product Summary
Product Details
SAF Water Cooled Protective Cover
,Electric Arc Furnace Protective Cover
,Submerged Arc Furnace Protective Cover
Product Description
The water-cooled protective cover is a key protective component of the electrode system in submerged arc furnaces (SAF). Installed at the lower part of the electrode, it isolates high-temperature furnace gas and thermal radiation, protects the electrode bottom device from burning, and removes heat through circulating cooling water to ensure stable operation of equipment under high-temperature conditions. The water-cooled protective cover is a key protective device in the electrode column of SAF, installed at the bottom of the electrode to protect the electrode bottom device from high-temperature furnace gas and charge, ensuring normal operation of the electrode column.
- Thermal protection: Isolates high-temperature furnace gas (1000-1500℃) and thermal radiation to prevent electrode equipment burnout
- Cooling: Removes heat through circulating cooling water to reduce equipment temperature
- Guidance and support: Provides guidance for the electrode to ensure vertical operation
- Insulation isolation: Prevents arcing between electrode equipment caused by large current and strong magnetic field
Located in the high-temperature zone of the furnace mouth, withstands 1000-1500℃ high-temperature furnace gas, thermal radiation, and strong electromagnetic fields. It is one of the most severely stressed components in SAF.
4. Classification of Water-Cooled Protective Covers
Based on structural form, cooling method, and manufacturing process, SAF water-cooled protective covers are mainly divided into the following types:
4.1 Classification by Structural Form
| Type | Structural Features | Advantages & Disadvantages |
|---|---|---|
| Split Type Protective Cover | Composed of two or more arc segments connected by flanges and bolts to form a ring; detachable structure | Advantages: Easy installation and maintenance, partial replacement possible. Disadvantages: Many welds, poor sealing, prone to water leakage. |
| Integral Full-Circle Protective Cover | Inner and outer walls are rolled and welded from single steel plates into a cylindrical structure; integrally formed | Advantages: High structural strength, few welds, good sealing, long service life. Disadvantages: Relatively complex installation and maintenance. |
| Double Water Jacket Structure | Inner and outer double water jacket structure forming two independent cooling circuits | Advantages: Good cooling effect, good electrode guidance, long service life. Disadvantages: Complex structure, high cost. |
4.2 Classification by Installation Position
| Type | Position | Function Description |
|---|---|---|
| Upper Protective Cover | Upper part of electrode holder | Protects the upper electrode assembly; shields from upper high-temperature radiation. |
| Lower Protective Cover / Bottom Cover | Lower part of electrode holder, near the furnace hearth | Directly exposed to high-temperature furnace gases and charge; most severe operating conditions; protects bottom electrode devices. |
| Fixed Cover | Middle part of electrode holder | Cooperates with the water-cooled jacket to provide structural support and guidance. |
4.3 Classification by Cooling Method
| Type | Cooling Structure | Features |
|---|---|---|
| S-Shaped Water Channel Type | Vertical and horizontal baffles inside forming an S‑shaped circulating water channel; cooling water circulates from the bottom high‑temperature zone to the top low‑temperature zone | Good cooling effect; water flow direction matches temperature gradient; high heat exchange efficiency. |
| Independent Water Channel Type | Multiple independent water channels arranged in the annular space; each channel has its own inlet and outlet | Uniform cooling; local failure does not affect the whole system; easy maintenance. |
| Mixed Water Cooling Type | Independent water channels and mixed water cooling zones arranged alternately; water flows upward in a serpentine pattern | Combines the advantages of both water channel types; high cooling efficiency; compact structure. |
| Spiral Water Channel Type | Water channel arranged spirally along the circumference of the protective cover | Long water flow path; uniform cooling. |
5. Cooling System Parameters
| Parameter | Typical Value | Unit |
|---|---|---|
| Cooling Water Pressure | 0.3 - 0.6 | MPa |
| Cooling Water Flow | 0.3 - 0.6 | L/s per channel |
| Inlet Water Temperature | ≤35 | ℃ |
| Outlet Water Temperature | <60 - 65 | ℃ |
| Working Pressure | 0.1 - 0.6 | MPa |
| Water Channel Quantity | 4 - 12 | PCS |
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