Tantalum coils are special heat exchange elements made of the rare metal tantalum. They primarily utilize tantalum's superior corrosion resistance and extremely high melting point to perform heating or cooling tasks in extremely harsh industrial environments. They are typically manufactured in spiral, U-shaped, or other forms to achieve efficient heat exchange within a limited space.
Tubing Preparation: Seamless tantalum tubes (extrusion + multi-pass cold drawing + vacuum annealing) or high-precision welded tantalum tubes (EB/TIG welding, post-weld cleaning to remove oxide layer); thin-walled coils commonly use seamless tubes. Filling: Wrinkle-resistant thin-walled tubes are often filled with fine sand/inert powder and sealed at both ends to prevent tube wall collapse or excessive ellipticity during coil forming (a commonly used patented process). Forming: Spiral mold + positioner winding; after cold forming, vacuum annealing is performed to eliminate residual stress and restore plasticity; then pickling, degreasing, and helium leak testing are performed. End Treatment: Welded flanges/joints, or expansion joints, require strict control of the welding atmosphere.
Condensers, evaporators, and reaction vessel coils for highly corrosive media such as hydrochloric acid and sulfuric acid in the chemical and pharmaceutical industries; purification equipment for high-purity reagents. Cooling coils for etching systems in metallurgy and electronics/semiconductor industries; heat exchange components for high-temperature vacuum furnaces. Sampling tubes and thermostatic/temperature-controlled coils for highly corrosive environments in laboratories; corrosion-resistant heat exchange piping for the nuclear industry. Key advantages:
1. Extremely corrosion resistant: At room temperature, it can withstand corrosion from almost all strong acids (such as nitric acid, sulfuric acid, and hydrochloric acid) and strong alkalis, except for hydrofluoric acid.
2. Ultra-high melting point: With a melting point as high as 2996℃, it can easily cope with high-temperature conditions of thousands of degrees Celsius.
3. Good thermal conductivity: High thermal conductivity ensures rapid heat transfer and improves heat exchange efficiency.
In the chemical industry, it is used for heating, cooling, and condensation in chlor-alkali industries and acid production. In the energy and power industry, it is used as a key heat exchange component in nuclear power plants and solar thermal power generation systems. In the electronics and information industry, it is used in the heat dissipation systems of high-end chip manufacturing, servers, and other precision equipment. In the pharmaceutical industry, tantalum is used for precise temperature control in aseptic production workshops. Tantalum is relatively soft, with lower strength and rigidity. When manufactured using thin-walled tubes, it is prone to deformation, and dimensional control is difficult, requiring specialized processes such as three-roller coiling to ensure quality. The appropriate tube diameter, wall thickness, and coil shape must be selected based on the specific application scenario (such as temperature, pressure, and medium). For extremely demanding operating conditions, tantalum coils are almost irreplaceable. Due to the softness of tantalum, extra care must be taken during manufacturing and installation to prevent scratches and deformation, as this is crucial to the performance of the final product.
