Graphite crucible has good thermal conductivity and high temperature resistance. In the process of high temperature use, the coefficient of thermal expansion is small, and it has certain strain resistance performance for rapid heating and cooling. It has strong corrosion resistance to acid and alkaline solution and excellent chemical stability.
Graphite crucible is widely used in smelting alloy tool steel and nonferrous metals and alloys in metallurgy, casting, machinery, chemical industry and other industrial sectors because of its excellent properties. It has a good technical and economic effect.
The production technology level of domestic graphite crucible has reached or even exceeded that of imported crucible. The high-quality domestic crucible has the following characteristics:
1. The high density of graphite crucible makes the crucible have the best thermal conductivity, and its heat conduction effect is obviously better than other imported crucibles;
2. The graphite crucible has a special glaze layer and dense molding material on the surface, which greatly improves the corrosion resistance of the product and prolongs its service life;
3. The graphite in graphite crucible is made of natural graphite, which has good thermal conductivity. The graphite crucible should not be placed on the cold metal table immediately after heating, so as to prevent it from cracking due to rapid cooling.
The crucible is the most suitable melting pot for many kinds of alloys with small quantity. In order to change the type of alloy, only the graphite crucible needs to be exchanged. Other melting methods, such as reverberatory furnace and non crucible induction furnace, are suitable for a large number of single alloy melting. If the type of melting alloy is changed and the refractory lining is not replaced, metal pollution will occur.
