Bright annealing of non-ferrous metals such as copper, aluminum alloy and ferrous metal, plain carbon steel, silicon steel, alloy steel, coil, wire, etc. in gas-fired bell type furnace.

The natural gas bell type furnace is mainly composed of heating hood, hearth, inner tank, combustion system, pipeline system, smoke exhaust system, automatic control system, power control system, etc. The heating cover is welded with section steel and steel plate to form a rigid structure with good air tightness. In the design, the influence of thermal expansion and the stability of lifting are fully considered, so that the steel structure is light and durable without deformation.

The combustion system of natural gas bell type furnace heating hood consists of several high-speed burners arranged along the circumference of the heating hood. The burner is automatically monitored by PLC process ignition system. The flame detector uses UV sensor head. Each burner failure and flame error are recorded separately. If necessary, one burner can be removed manually, and the annealing process will continue without one burner. The heating process is protected by two monitoring loops: one is monitored by PLC and the other is monitored by a separate temperature monitor.