If you want to export your Loved tracks out of Deezer, you have to do it via the API.
You need to:
– create an app (https://developers.deezer.com/myapps)
– go through the oauth dance (https://developers.deezer.com/api/oauth)
– find the id of your ‘Loved tracks’ playlist (https://developers.deezer.com/api/explorer -> user -> playlists)
– get the tracks for that playlist (https://developers.deezer.com/api/explorer -> playlist)