Yeah, IF it was to be fulled, you can try that in a washing machine, but it will also cause some shrinkage.
I fill my washer on low, using the hottest water (since heat over time in the water heater destroys the chlorine) and then let the water sit and come to room temp.
Then I add the woolite, let it mix for a few seconds, then add the blanket and let it soak in the water in the machine, with the machine turned off. Let it set about 30 minutes, then I move the dial to spin dry, and let the washer spin dry the blanket. The machine will then refill for the rinse. Now that's cold, chlorinated water, but you only let it sit for about five minutes, then move the dial to spin dry and spin dry it again.
Spinning uses centrifugal force, not agitation..,
I remove it from the washer, and then as the guys have said, you hang it over a line, a 1/2" rope is better, but over a bare, wooden closet rod is even better as it won't form any sort of crease in the blanket. Then fold it up after 24 hours after checking if the ends are damp.
LD