Its unfortunate, but a standard woodburning fireplace in a house creates minimal, if any, heat gain to the home itself, unless it is a very small house. An open fireplace uses most of its heat to maintain draft, so while the room you are in may seem warm from the radiant heat, outlying rooms in the house are actually getting colder, as cold air is sucked in from outside to feed the air requirement for the fireplace draft. That said, you may be able to get by burning bituminous in a grate in a small fireplace, but certainly not anthracite.
I have burned anthracite and bituminous in my Jotul Kennebec fireplace insert, but very small amounts. My method was to pile 5-6 large pieces of stove coal immediately in front of the air inlet for the stove, with the remainder of the firebox burning wood. The intention was to increase the length of time that I had hot coals in the stove to restart a fire. I can tell you from trying this numerous times over several years, while interesting to watch, it made absolutely no appreciable difference in the heat from my fire, or the length of time I had coals. It's just not designed for it.
If you have any questions, feel free to ask.