Bell-type furnace is a discontinuous & variable temperature furnace, the furnace combustion chamber has no segmentation, the furnace temperature varies along with time according to heating process. The heated workpiece in bell-type is mostly: rolled strips and wires, tied bars and tubes, stacked plates and allotypes whose size is small and form is complex.

Application:

1）Bright annealing of workpieces

2）General heat treatment of workpieces

Structure characteristic: Bell-type furnace is composed of external bell, internal bell and furnace stand. Bell-type furnace needs neither furnace door and its lifting mechanism, nor mechanical transmission, so the investment is lower. During the production, generally, many charged furnace stands combine a group to share a external bell (heating bell). After heating process, the external bell is installed on the other furnace stand, in order to start a new heat treatment heating process.

Furnace classification:

Heat schedule: bright annealing furnace, heat treatment furnace.

External bell form: circle and rectangle form.

Advantages:

1）Don’t need various mechanical transmissions, lower investment.

2）Occupation area is small, but production capacity is bigger.

3）Because of good tightness, it can have the protection atmosphere.

Fuel: Coal-gas, blast furnace gas, mixed gas of blast furnace & coker, natural gas, electricity and light fuel etc.