How long can the graphite crucible of the copper melting furnace be used?

How long can the graphite crucible of the copper melting furnace be used? Many users who are used to smelt copper are more concerned. The use time of graphite crucibles in copper melting furnaces is related to the material of the smelting metal. The temperature reached when brass and bronze are melted is different, so the better time is not complete. Similarly, common problems and cracks in graphite crucibles of copper melting furnaces are:

1. Problem description: near the bottom of the graphite crucible of the copper melting furnace (it may cause the bottom of the crucible to fall off)

Reason analysis: 1. The temperature rises too fast during the preheating process.

2. Knock the bottom with a hard object such as an iron rod.

3. The thermal expansion of the metal remaining at the bottom of the graphite crucible of the copper melting furnace can also cause this kind of damage.

4. It may be caused by a hard object hitting the inside of the crucible, such as throwing the casting material into the crucible

2. Description of the problem: approximately in the general position of the crucible

Reason analysis: 1. Place the crucible on the slag or unsuitable base of the crucible

2. When taking the graphite crucible of the copper melting furnace, if the position of the crucible clamp is too high and the force is too strong, it will cause the crucible

Cracks appeared on the surface of the crucible at the bottom of the crucible clamp.

3. The burner control is not correct, part of the graphite crucible of the copper melting furnace is overheated, and part of the graphite crucible is not heated effectively, and thermal stress causes the crucible

Cracking

3. Description of the problem: When using a dump type (with a mouth) crucible, there is a transverse crack at the bottom of the mouth of the crucible

Reason analysis: 1. It is not installed correctly.

2. When installing the graphite crucible of a new copper melting furnace, if the refractory soil is tightly squeezed under the crucible mouth, during use,

When the crucible cools and shrinks, the stress point will be concentrated on the mouth of the crucible, and cracks will occur.

3. The graphite crucible base of the copper melting furnace is not suitable