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Submerged Arc Furnace Bottom Ring Stainless Steel Copper Type

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Submerged Arc Furnace Bottom Ring Stainless Steel Copper Type

Name: Submerged Arc Furnace Bottom Ring Stainless Steel Copper Type
Brand: Hongxin
Price: 1 USD

Brand Name : Hongxin

Place of Origin : China

Price : Negotiable

Payment Terms : L/C,D/A,D/P,T/T,Western Union

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Stainless Steel or Copper Type Bottom Ring

The bottom ring is one of the core components of the electrode combined holder in submerged arc furnaces (SAF). Located at the lowest end of the electrode holder, it undertakes multiple functions including protecting the electrode system, fixing the heat shield, and providing insulation protection. Its performance directly affects the stable operation of SAF and the frequency of shutdown maintenance.

1. Definition

The bottom ring is an important component of the electrode combined holder in SAF, installed below the pressure ring. It has a circular ring structure with internal circulating cooling water channels, used to protect other components of the electrode holder from high-temperature flue gas damage.

2. Functions

Protection and support: Serves as fixed support for the heat shield, protecting the bottom of the heat shield and contact elements from high-temperature flue gas damage
High-temperature isolation: Prevents high-temperature flue gas from entering the electrode holder interior, avoiding damage to conductive tubes, contact elements, etc.
Insulation protection: Installs insulating materials to prevent arcing between the electrode system and the heat shield.
Guidance function: Provides guidance for the electrode column to ensure vertical operation.

3. Working Environment
Located at the lowest end of the electrode holder, directly facing high-temperature flue gas inside the furnace (1000-1400℃), strong electromagnetic fields, and dust erosion. The working condition is extremely harsh, making it one of the components with the highest failure rate in SAF.

4. Classification of Bottom Ring

4.1 Classification by Material

Type	Material	Features
Copper Bottom Ring	T2 copper / electrolytic copper	High thermal conductivity (~390 W/(m·K)), good cooling effect, but lower strength and prone to deformation
Stainless Steel Bottom Ring	304 / 321 / 06Cr25Ni20 stainless steel	High strength, not easily deformed; manufacturing cost about half that of copper bottom ring; service life more than 3 times that of copper bottom ring

4.2 Classification by Manufacturing Process

Type	Process Features	Advantages & Disadvantages
Cast Copper Bottom Ring	Direct casting or casting with embedded copper tubes	Disadvantages: casting defects such as loose structure, porosity, slag inclusion, cracks; embedded copper tubes not fully fused with the matrix, resulting in air gap thermal resistance and reduced thermal conductivity
Forged Copper Bottom Ring	Formed from forged or rolled copper	Advantages: dense structure, good mechanical properties and thermal conductivity
Welded Bottom Ring	Formed by welding stainless steel plates, with internal L-shaped cooling water channels	Advantages: low manufacturing cost, not easily deformed, large channel area, good cooling effect; service life more than 3 times that of traditional copper bottom ring, cost only half that of copper bottom ring

4.3 Classification by Structural Form

Type	Structural Features	Advantages & Disadvantages
Integral Bottom Ring	Assembled and welded from multiple components into one integral structure	Advantages: high structural strength, good sealing, avoids flame leakage and water leakage Disadvantages: relatively complex maintenance
Combined Bottom Ring	Composed of 4–8 welded bottom ring segments, each can be removed and replaced individually	Advantages: easy maintenance, partial replacement possible, reduces furnace downtime Disadvantages: more complex structure
Split Bottom Ring	Composed of multiple split units	Advantages: easy installation and partial maintenance

5. Specifications and Parameters

Parameter	Specification Range
SAF Capacity	12500 - 81000 kVA
Bottom Ring Diameter	Φ800 - 2000 mm
Number of Combined Units	4 - 8
Cooling Channel Cross-section	L-shaped
Working Pressure	0.3 - 0.6 MPa
Working Temperature	1000 - 1400℃

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