The benefits of specifically purified cast iron, they are a symbol of strength and unity. The cast iron tea pot is intended for brewing and serving tea only.
Some guidelines to follow:
It’s best to have some liquid in the teapot before setting it on the heat source.
Fill the teapot about two thirds full of water so that when it boils it does not bubble over.
Add the tea leaves in after the water is heated (not a strict rule, just my personal experience here — you can always try added the tea leaves into the water first and then heating).
If you use the infuser basket that often comes with these teapots, put it in after heating the water. (Also, the rim will get very hot during steeping, so take care when lifting it out.)
These teapots can absorb some of the flavors of the teas you steep in them (not quite as readily a zisha clay teapots), so you may want to designate different teapots for different teas and “season” them by doing several steepings close together.