metalresearcher
National Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 737
Registered: 7-9-2010
Member Is Offline
Mood: Reactive
|
|
Making ferrosilicon
For iron casting I want to use Ferrosilicon and I made it in small quantities by heating pieces of iron, aluminum and SiO2 sand.
Unfortunately I cannot analyze the result, but it should be 70%Fe and 30%Si.
It is based on the fact that at high temperatures (> 1500 C) Al reacts with SiO2 and makes silicon, which I heated with an electric arc to reach
extreme temperatures. I don't know why it is so 'boiling' (3:15). In the result it is to see, beside the chunk of frozen FeSi (5:38) , some dark gray
crystals can be seen (silicon ?).
Here a video:
http://www.metallab.net/jwplayer/video.php?f=/clips/Ferrosil...
|
|
macckone
Dispenser of practical lab wisdom
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 2168
Registered: 1-3-2013
Location: Over a mile high
Member Is Offline
Mood: Electrical
|
|
Profesional metalurgist would make the silicon purify it then dissolve it in pure iron under an argon atmosphere. The iron and silicon would be
ground for the second reaction.
|
|
DeIonizedPlasma
Harmless
Posts: 21
Registered: 28-9-2014
Member Is Offline
Mood: No Mood
|
|
I do not know much about alloy making, but is there a reason you did this in one step rather than making silicon and isolating it to the best of your
ability, then making the alloy? The sand would seem to add an unnecessary element of possible failure or loss of efficiency.
|
|
Texium
|
Thread Moved 22-11-2023 at 19:56 |