Public Tor exit nodes are banned on the network due to abuse.
The AnonOps IRC Network does allow access through a Tor hidden service leaf server which users have to be manually added to by network administrators, but only after prerequisites are met by a user. Simply connecting to a standard server or via the webchat to the IRC network will result in an error message and a failed connection.
In order to be added to the Tor leaf, a user need to register its nickname and actively use it for a day or so to show an interest in using the network regularly.
The user is also asked to develop a basic knowledge of usage commands needed for IRC networks which includes learning the connecting user's identification string in the format nickname!username@hostname and understanding what each part means. To see an example of this simply /whois yourself. The first line displays your nick, username(ident)@AN-l33.k38.9vuj2o.IP (your cloaked ip/hostname - it will be random).
When, and only when, these prerequisites are met, a user can request the tor leaf access.
Unlike help given for other topics, setup and configuration of IRC clients to work correctly with Tor is considered a more advanced subject and it is therefore up to the user to self-educate in these matters as step-by-step help will generally not be given.