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I'm performing an experiment based on slag corrosion behavior of the refractory material. I need to store molten metal at $\approx$ 1600-1700 K for that.

Specifically, I'm working on slag corrosion and penetration behaviour of refractory (MgO-MgAl2O4). I'm going to use immersion method, so in this method "Cylindrical or square pillar shaped samples are held in the corrosive liquid(slag) in a furnace. Immersion time, temperature and atmosphere can be varied" So, for storing slag+molten metal, I need to use a crucible.

Please suggest what would be the best choice of material for crucible. What is a crucible material?

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    $\begingroup$ What have you found so far? What gets used in foundries? $\endgroup$
    – Solar Mike
    Jan 15 '18 at 8:30
  • $\begingroup$ Have you looked at any table of element melting points (and/or alloys)? $\endgroup$ Jan 15 '18 at 16:08
  • $\begingroup$ Refractory lined steel crucible. $\endgroup$ Jan 15 '18 at 17:28
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I would suggest a silicon carbide crucible. The melting point is like 3000k which should serve your purposes. Also as I recall, it is inert to most molten metals.

You say you are testing slag with molten metal. What is the metal? Do you know what the slag is composed of?

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  • $\begingroup$ mostly molten steel slag CaO-Al2O3-SiO2 basicity approx 1.7-1.8 $\endgroup$ Jan 16 '18 at 14:21
  • $\begingroup$ If you check literature , I think you will find small amount of " bad actors" like Fl and Zn cause most of the refractory deterioration. Not my area, but I have read that "acid" slag or "basic" slag is important. Look at " Making and Shaping of Steel" by USSteel. $\endgroup$ Feb 15 '18 at 16:46

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