Structural Features of High-Temperature Tube Furnaces
2019-08-05
I. Appearance
1.1. Materials: Manufactured from cold-rolled steel sheet through precision machining on CNC equipment, with a high-temperature baking finish on the exterior surface for an aesthetically pleasing, elegant appearance and harmonious color scheme.
1.2. Door-opening method: top-opening, suitable for a variety of experiments, such as calcination, etc.
1.3. Structure: The furnace features a double-shell design, with a fan installed between the two shells to enable rapid heating and cooling; the outer surface of the furnace shell is low-profile.
II. Electrical Components
2.1 Thermocouples: Utilizing nationally standardized precious-metal thermocouple wires as raw materials, these thermocouples deliver accurate and stable temperature measurements that remain consistent across the entire range. The thermocouple type is matched to the selected furnace temperature: K-type (0–1200°C), S-type (0–1600°C), and B-type (0–1820°C).
2.2 Temperature Controller: A fully intelligent, 16- or 32-segment PID temperature controller from a Taiwanese brand is employed. The controller features a dual-line LED display and is primarily used for precise temperature control, with rapid response and programmable 16- or 32-segment automatic heating, holding, and cooling temperature profiles. It supports unattended operation, PID control, deviation monitoring, and over-temperature power-off alarms, thereby ensuring consistency and reproducibility in any test or experiment.
It features automatic temperature恒ing and time control, as well as a two-level over-temperature automatic protection function, ensuring reliable control and safe operation.
2.3 Electrical Components: Standard-compliant components are used, featuring phase-shift triggering and thyristor control, assembled into an intelligent electrical system that is perfectly matched to the electric furnace. This system boasts a long service life, excellent shock resistance, high safety, and zero noise, thereby replacing outdated relay-based circuits.
2.4 Transformer: Employs a fully isolated, silent copper-wire transformer with low noise and minimal heat generation, ensuring a high safety factor (provided for silicon-molybdenum rod furnaces and molybdenum wire furnaces).
Three, Furnace Chamber
3.1 Internal Walls: Constructed from high-temperature fiber boards or high-temperature bricks meticulously assembled in multiple layers, these walls exhibit exceptional resistance to high temperatures, acids, alkalis, and oxidation; they are crack-resistant, long-lasting, have low thermal conductivity for energy savings, and feature a unique furnace chamber design that ensures durability and structural integrity without collapse. (The specific refractory material for the internal walls is selected based on the furnace temperature.)
3.2 Intermediate-layer insulation: Ceramic fiber materials such as standard alumina, high-alumina, and high-alumina-zirconia are selected for insulation due to their excellent high-temperature resistance, low thermal conductivity, and non-polluting properties (insulation materials are chosen based on the specific operating temperature).
3.3 Outer Thermal Insulation: High-temperature felt or nanofiber board (select insulation material based on the specific temperature).
Contact Information
Address: No. 11 Shuangchuan Road, Tianjin Beichen Science and Technology Park
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