I want to make a thermite factory by putting brel and brmt together and heating them (in a diamond box). Whenever i try it is either not hot enough or it just ignites the thermite that gets made. What could i use to heat it to the right temperture?

I tried using TNT but the pressure it made just flung the metal all around rather than heating it. I am considering using heated glow. `update: it turns out glow didnt work

ok i got the heating down but now i just need a way to get the brel and brmt to have the same amount and be touching eachother, i tried using stor but it didnt seem to work