hello i to am haveing trouble with claying and makeing a refractory for my forge. Sounds like you have a coal forge. I am useing a gas forge and the mix i put together has melted it is goo at forge temp it took quite a while to get to the goo point. So any ways i am looking for a good refractory mix too what i used last time was 20 to 25lbs of fire clay and 25 lbs of morter mix and One small bag of vermiculite and proubly too much H2O. i am going to try something diffrent i think i still got 30lbs of fire caly left.