There will nevertheless be some oceans of water stuck around the concrete compounds, but they will not come down and soon you are properly near or above 2000F, aluminum touches at about 1100F, depending on the mix, and you often get it up to about 1300 to 1400F to dump it. At these temps, once your mold has been cooked by you, you will be just good.
Someday you might figure out that you need something specific, and you'll create a shape and after that pour metal involved with it, permit it neat, then you'll take your punch and report (or grinder) to it and make it to the final form of what you desired.
Proceeding further, you should study on mold producing, you will make your own cope (prime of mold) and move (bottom of mold) for a mold, get some foundry sand, ram it over your object you wish to http://uid.me/hubert_torrain mold, subsequently separate the deal and also the lug and make a sprue (what your pour the aluminum into) along with a riser (the exit for your aluminum within the mold) and you will pour in your metal.
The water droplet along with the molten 1400F aluminum can increase to over 1800 TIMES its fluid size into water and it will do this in milliseconds which vapor explosion is prompt and can expand to the molten metal exactly like you shot a topic to the molten material.
