The hot body will be softened, expanded, dropped, laid down lapped first, then fused (melted) after long-term operation. In order to make the furnace wire have a certain strength at high temperature prevent softening, collapse sagging, the first thing is to design the structural dimension of the furnace wire, such as the spiral resistance wire, pay attention to the diameter, pitch pitch of the alloy element. The heating body shall be installed close to the furnace lining, the bricks shall be laid flat with expansion space properly reserved. The position of small hook shall be suitable, generally 400-600mm, it can be firmly hooked to prevent lying down. In addition, in order to prevent the contact between the furnace wires, the isolation piece shall be padded. Can be used 95 porcelain other high-temperature materials made of sheet insulation resistance wire, to prevent overlapping. In particular, the transition between the brick laying layer the layer in the furnace (when building the furnace, a gap of 50mm is generally reserved between the brick laying layer the front rear end walls, which is used for the turning installation of the resistance wire), the porcelain plate shall be pre padded, the furnace wire shall be covered with a porcelain tube (the porcelain tube shall be top to end). The thin slice of diatomite brick saw can be used to pad in the middle of furnace wire in high temperature furnace. Because diatomite brick has poor heat resistance, it can only be used below 900 ℃, it is easy to dissolve deteriorate in high temperature furnace.

The multi-purpose furnace heat treatment shall be applied to the furnace wire with lodging tendency, check whether the small hook of the furnace wire plays a role (the hook for erecting the resistance wire belt shall be firmly built, pressed, plugged, shall be loose), the furnace wire can be softened by gas welding torch baking, then its original shape size can be restored, as well as the porcelain tube (the core rod can be worn in the porcelain tube) can be worn in the furnace wire, etc. If two porcelain tubes are used at the same time, the end of the porcelain tube must be close to each other.

The heating body can be directly welded to repair the general broken ends. For serious collapse, non straightening partial over burning, the method of replacing repairing one section can be adopted. It is necessary to scrap the whole set because of the partial unqualified parts. It is necessary to note that the material, diameter, pitch length of the resistance wire used for repair welding shall meet the original technical requirements. The newly repaired resistance wire shall have cracks, rust, etc Defects shall be even dense. When using the old resistance wire, there should be no obvious uneven thickness, oxidation corrosion, crack deformation aging embrittlement. The old lead out rod shall be free serious oxidation corrosion.

The above is a multi-purpose furnace production line manufacturers to introduce the relevant content, I hope to help you.