Bell Type Annealing Furnace

Danyang Dingfeng Industrial Furnace Co., Ltd. is one of the most reliable manufacturers and suppliers of bell type annealing furnace in China. If you're going to wholesale durable bell type annealing furnace made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.

Product Definition

 

Bell type annealing furnace. It's a batch furnace – not continuous. You'll see these a lot in the metallurgical industry. The setup has two main parts. One is the base, which stays put. That's where you load your workpieces. The other part is a movable bell shaped cover that goes over the top. The heating elements are inside the bell.

This thing is the industry standard for annealing steel coils, copper coils, aluminum foils, wire bundles. Improves ductility, gets rid of internal stress. Does the job.

Working Principle

 

Here's how it works. You put your material inside a sealed inner cover. That inner cover has a protective atmosphere – hydrogen or nitrogen, something to keep the oxygen out. Then you lower the heating hood over the whole thing. The hood heats up – electric, gas, or oil fired – and you follow your process curve. Heat, hold, cool. If you're doing bright annealing, the protective atmosphere keeps the surface clean.

• Good atmosphere sealing. You've got a sealed inner cover plus sand seals or mechanical clamps. That keeps the protective gas in and the air out. Your workpieces come out bright – no oxidation.
• High batch capacity. You stack coils vertically. The bell comes down over the whole stack. So you can process multiple heavy coils at once. Good for production.
• Energy efficient. A common setup is one base with two bells – a heating bell and a cooling bell. While the heating bell is doing its job on one load, the cooling bell is cooling another. You recover heat and save energy. Less waste.
• Even temperature. There's a high temperature circulation fan inside the inner cover. That fan moves the hot air around. Even through a tightly stacked pile of coils, the temperature stays consistent. Without the fan, you'd have hot spots and cold spots.
• Flexible operation. The bells move. You can share them across multiple bases. So if you have several bases, you move the heating bell from one to the next. Good for production scheduling.
• Safe. The heating elements are in the bell, separate from the workpiece chamber. Less chance of contamination. Safer for the operators.
• Low maintenance. The mechanical structure is simple and robust. No fancy moving parts. The modular design makes repairs easier.

Applications

 

Bell type annealing furnaces are used for a lot of different materials. Cold rolled steel strips, copper and copper alloy strips, wire rods, silicon steel sheets, steel wires, fastener coils.

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