Jiuyang purple casserole is a traditional cooking tool, which is made of purple clay and has the characteristics of heat preservation, freshness preservation and taste preservation. Under normal circumstances, as long as it is properly maintained, the service life of Jiuyang purple casserole is relatively long.

According to the information you provided, the Jiuyang purple casserole in 2009 has been used for quite a long time. Whether you can continue to use it, you need to consider the following factors:

1. pot maintenance: the service life of Jiuyang purple casserole is affected by maintenance. If you maintain the pot regularly and use it correctly, such as cleaning it regularly and avoiding excessive high temperature heating, even the pot you bought a few years ago can still be used normally.

2. Condition of the pot: Please check the pot for cracks, wear or other damage. If the surface of the pot is obviously scratched, damaged or deformed, there may be problems in using the pot. In particular, the damage of the bottom of the pot will affect its heat conduction performance and use effect. At this time, it is best to buy a new pot.

3. Safety: If the pot is seriously damaged, such as broken or leaking, then using the pot may bring potential safety hazards. In this case, I suggest you stop using it and buy a new pot in time.

Generally speaking, the Jiuyang purple casserole in 2009 should still be used in general. But please check the condition of the pot, and judge whether it is safe or not based on the above factors. If you have any doubts about the safety of the pot, I suggest you buy a new pot to ensure your safety.