The answer is that it depends…In many applications it is possible to reuse the cages once or possibly more. But in many other applications it may not be wise to reuse the cages.

Baghouse cage damaged by corrosion and improper handling

The two main types of cage damage we see are physical damage (bending, breaking, warping, etc.) and chemical corrosion. Over time, filter cages are often inadvertently bent or damaged by maintenance personnel during replacement and maintenance work. Other times, cages can also be damaged when they are stored in stacks. Additionally, fire or temperature excursions can deform the cage.
Due to chemical attack or abnormal conditions in the system, the dust filter bag may be damaged and corroded due to the breakage of the support filter cage. In some applications, high moisture levels can rapidly promote corrosion of metal cages. Sometimes cages are stored outside and exposed.

So reusing a damaged cage will cause your baghouse to fail faster!

Damaged or corroded cages can cause dust filter bags to fail in three ways:
Curved baghouse cages have worn holes in the filter.
A bent or warped cage can eventually wear holes in your bag and cause massive leaks. Using damaged or corroded cages with a new baghouse can damage your filters and cause them to fail. This means that you will experience leaks or even complete filter failure sooner than normal. Such failures can be costly in terms of maintenance, possible system shutdowns, lost production, and the cost of purchasing replacement filters earlier than normal.
When the pulse bends the cage, it causes the filters to rub against each other or the sides of the collector, causing the bag to tear.
Bent, twisted, or broken cages will have many sharp edges that quickly cut holes in the fabric when pulsed.
Rusted or corroded cages can corrode the fabric of the bag, and holes can quickly appear.

In corrosive environments
(acid/base compounds, high humidity, condensation, etc.) applications such as foundries, dryers, chemical processing, etc., where repeated use of damaged or corroded cages must be avoided.
Even in milder applications, frequent handling of cages and repeated cage replacements can eventually lead to cage damage. Using cages in good condition can extend filter life and improve efficiency, preventing:
Tear or cut the filter on sharp edges
Damage from wear and tear on other bags or units
Corrosion will corrode the fabric on the bag (consider investing in galvanized, epoxy coated or stainless steel cages for improved corrosion resistance
Make sure the bag is properly installed on the cage, cleaning is not good (the bag needs to be installed correctly
Get the desired air pulse rebound over the entire cage... bending the cage is not possible.

Reusing a damaged cage can cost you dearly

Bent and rusted dust collector filter cage
Corroded (rusted) cages can cause early bag failure. If the cage is damaged or corroded in any way, avoid reusing the cage.

Even minor cracks, holes and tears in the bag can lead to exceeding emission limits. In many factories, such problems can cause emissions to spike and become "reportable incidents" that can lead to fines and sanctions from regulators. In addition, any baghouse failure has the potential to cause plant-wide problems, resulting in downtime, lost production, and other costs that far exceed the cost of replacing the cage.
You can avoid all of these problems and more by not using damaged or corroded cages in your baghouse. Also, if you keep spare cages on site at the factory, be sure to store them in a location that will prevent corrosion and avoid stacking them in rows to prevent buckling.