What are the design features of a box-type furnace?
2024-04-07
Box furnace Also known as a muffle furnace, it is a type of heating furnace with a box-shaped furnace chamber. This furnace is easy to operate and maintain, and is equipped with a controllable chimney at the rear. It is suitable for applications across a wide range of industries and sectors, including chemical analysis of coal, coking products, and chemical raw materials, as well as power generation, papermaking, petrochemicals, cement production, agriculture and animal husbandry, pharmaceutical research, and education and teaching.
The box-type furnace is characterized by a furnace chamber constructed from stainless steel plates, which enclose the heating and hot-air circulation zone. The circulating hot air within the chamber significantly enhances temperature uniformity. The furnace chamber and the furnace frame are designed as separate components: the chamber rests on load-bearing rollers at the base of the frame and can slide freely in both the front–back direction. When heated, the chamber is able to expand freely along its longitudinal axis. In addition, to prevent leakage of hot gas from the chamber, the furnace door is equipped with a double-layer sealing system—two seals arranged from the inside outward—and features a multi-point handwheel-operated locking mechanism. A door-fixing device is mounted on the end face of the furnace chamber and employs a movable double-hinge mechanism, allowing it to move in tandem with the chamber’s longitudinal expansion and thereby ensuring superior sealing performance.
The box-type electric furnace employs a reliable integrated circuit design, ensuring a favorable operating environment and strong anti-interference capability. At the maximum temperature, the furnace shell temperature remains ≤50°C, significantly enhancing the working conditions. Equipped with microcomputer program control, it supports up to two sets of 16-segment heating/cooling profiles, enabling fully automatic temperature ramping and plateau maintenance. During operation, temperature-control parameters and programs can be modified, offering flexible, convenient, and straightforward operation. In addition, the furnace delivers temperature-control accuracy and temperature-holding stability both within ±1°C, with a rapid heating rate of up to 45°C per minute. Its well-designed structure features a double-layer inner-and-outer furnace jacket and air-cooling heat dissipation, which substantially shortens the test cycle.
In general, both box furnaces and muffle furnaces are heating furnaces with a box-shaped furnace chamber, making them suitable for a wide range of industrial and institutional applications. Box electric furnaces, in particular, are electrically heated furnaces that offer superior operating environments and more precise temperature control. These devices play a vital role in research, education, and industrial production.
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