Catelite:

You can't forget that glass insta-breaks above certain pressures. Lava -generates- pressure. Try applying vacuum to hot lava and watch what happens when you cool it.

 Sorry for bumping the thread, I'm new and wanted to attempt doing this sand => glass thing. So... how do you do it then? Yes, the vacuum sucks everything up, but that's not really helpful in terms of you starting out with sand and turning it into glass, as far as I can tell.

Candunc:

It turns into lava and hold it for a minute and it turns to glass. I am working on one right now, it works.

 Mine doesn't do anything. I just try to burn the sand and it stays as is. May be it needs higher temperature? Not sure how you control that. Fireworks? :P

HeyJD:

blizow
Do you mean in real life?

 Not sure if serious...

Yeah, sorry for the necro, couldn't really not-do that without getting more info on this. But hei, I'm at least trying to add something to the topic. Better than creating a new thread, asking the same question?

That seems like you would need to put in way more effort than you would in real life, I mean, you just burn sand and get glass and that's it. May be it's because the particles in the air cool the heated sand down? Also, I'm guessing I'll need to make the system have the sand pushed through the system, so what could I use to push it through without affecting the reaction?

EDIT: What are you using to heat up and cool the sand down? That doesn't look like fire and cold air, but more like some forms of liquid.

I've seen a thread on a science forum, which got accidentally necroed after 23 years.