I have looked at copies of the relevant phase diagrams. But, they only deal
with the situation after the limestone flux has decomposed. At what temperature
does limestone decompose?
Thanks
Jamie
Peter Hutchison wrote:
> You cannot melt limestone or dolomite because they decompose before they
> melt. The melting point of the resultant lime is 2570 deg C. It sublimes at
> 2850 deg C. I believe the melting point of burned dolomite is well above
> 1750 deg C. They are of course very reactive and dissolve fairly readily in
> an iron silicate slag displacing the iron. Dolomite refractories only work
> in contact with slag when the slag is high in lime.
>
> Peter Hutchison.
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