Dear Mr Dita.

Linnings for a arch furnaces depend largely ion the type of material being melted , and the pH of the slagg.

But I am sure you are aware of that.

I wonder if you want a slagg chutte or something similar.

As our friend has mentioned you can use silicon carbide , has high thermal conductivity and low expansion coefficient , this will make it resistant to thermal shock , what normally is the killer in ceramic applications.

It is also very resistant to wear. there were some limitations on its use in oxigen bearing and Co atmospheres, but i am sure this can be better explained by the manufacturer.

Try ROJAN CERAMICS in KWINANA AUSTRALIA , they have done work for me and they do a good job . Carborundum might be able to supply also .

This are expensive items....

If you can do with carbon can you try graphite? , it also exibits high thermal shock resistivity and cand stand most atmospheres except of course oxidicing ones. Not extremely wear resitant but it can cope with impact.

If yours is an arch furnace you are alrready using graphite in your electrodes , there are some suppliers for graphite bricks worlwide. Give them a call.

Regards

marco ■

Many years ago I worked on the design of a magnesium furnace and its 2200 C MgO liner. Here is a squib from this website:

http://pharmamanufacturing.globalspe...lup&comp=3719

Magnesia ceramics or refractories are based on compounds magnesium and oxygen. Magnesite or magnesia refractories or minerals are also known as magnesium oxide, magnesium carbonate, deadburned magnesite, calcined magnesite, periclase or magnesia clinker. Depending on the origin and processing, magnesia is divided into caustic, dead-burnt, fused, precipitated, sintered or calcined and synthetic magnesia forms. The high melting point (2800°C) and the heat resistance (1700°C in the reducing and 2300 °C in oxidizing atmosphere) of magnesium oxide make it suitable for the production of refractories. Magnesite is the naturally occurring mineral or ore used to produce magnesium oxide based refractories. Magnesite often contains iron, manganese or other activator elements. Magnesium oxide refractories with a carbon bond are frequently used in the steel industry. Magnesite refractories have good resistance to molten iron and steel. ■