Standard Installation Procedures and Specifications for Silicon Carbide Rods (Zhengzhou Runda Technical Guide)
2026-04-22
Standard Installation Procedures and Specifications for Silicon Carbide Rods (Zhengzhou Runda Technical Guide)
As the core heating element in industrial high-temperature furnaces, the proper installation of silicon carbide rods directly affects their service life and heating stability. This article, published by the Technical Department of Zhengzhou Runda High-Temperature Furnace Components Co., Ltd., provides a detailed, step-by-step guide to the standard installation process for silicon carbide rods.
I. Pre-Installation Preparation
1. Component Inspection
Upon unpacking, inspect the silicon carbide rods for any cracks or defects; the cold-end aluminum spray coating must be intact. Measure the resistance; only when the resistance variation among components in the same group is ≤10% may they be paired and used together.
2. Furnace Opening Size Confirmation
The inner diameter of the furnace wall perforation shall be 1.4 to 1.6 times the outer diameter of the cold-end section, and the perforations on both sides shall remain concentric. The gap shall be loosely packed with aluminosilicate wool; excessive tightness that compresses the rod body is prohibited.
3. Accessory Preparation
Complete with aluminum braids, G-type clamps, and insulating porcelain components to ensure excellent conductivity and reliable insulation.
II. Installation Procedure
1. Handle with care
Silicon carbide rods are hard, brittle, and prone to breakage; striking, impacting, or dropping them is strictly prohibited at all times. During rod insertion, the rod must be able to rotate freely through 360° to be considered合格.
2. Localization of the Fever Site
The heating section shall be as long as the furnace chamber width and must not extend into the furnace wall. The cold end shall project 50–150 mm beyond the furnace wall to ensure adequate heat dissipation and sufficient space for wiring.
3. Spacing Control
The distance between the heating rod and the furnace wall, as well as between rods, shall be no less than three times the diameter of the heating element; the spacing between rods shall be no less than four times the diameter of the heating element.
4. Wiring Standards
The cold-end aluminum-spraying area shall be connected using aluminum braids and securely clamped with fixtures to prevent arcing caused by poor contact. After wiring, verify continuity and insulation.
III. Post-Installation Inspection
• Mechanical fastening is secure and free of looseness.
• Reliable electrical connections with no loose connections
• Insulation resistance meets the standard (≥2 MΩ)
• Manually and gently rotate the rod to ensure there is no compression.
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