Ice is a fatbike nemesis. No matter how fat a tire you are running, if you hit a patch of ice you are going down. There are studded tires on the market, however Grip Studs provide a viable option. They install as easily as the company says and they do not destroy your tire in the process. Grip Studs are very durable and even do double duty as boot studs.
Check out the video of the install and stay tuned for a field test and a couple of very icy trail rides.