Category Archives: Faq

FAQ (frequently asked questions) related to industrial heat, foundry, aluminium and refractory products.

Why does corundum appear?

Corundum formation and its subsequent destruction of the furnace lining can be a constant worry [...]

WHAT IS PLASMA?

 Without going any further, the Sun is, in itself, a gigantic plasma, full of atoms [...]

What is the natural mechanism of wear away of silicon lining?

The carbon reduction of the silica is a natural reaction accentuated with temperature. SiO2 lining [...]

Why do vertical cracks appear in the cooling?

The formation of cracks is inherent in the nature of the raw material quartzite when [...]

Does the induction influence the wear of the lining?

Yes. The electromagnetic agitation provokes the movement of the metal inside the crucible. The speed [...]

Why slag may appear adhered to the lining?

The slag adhered to the silicon lining carries an inefficient running of the furnace. It [...]

Why do horizontal cracks appear in the lining?

There is no single answer. There are several possible reasons that we can number as [...]

Why does Zn appear against the mica during the demolition of the lining?

The presence of Zn in the demolition is associated with its presence in the used [...]

What is the difference between acid and boric oxide?

Boric acid is the hydrated form (it contains water) of boric oxide (anhydrous form or [...]

At what temperature should I sinter a silicon lining?

It is recommended to sinter the lining 50ºC above the working temperature. Keep this temperature [...]

Why does the lining appear pale pink or reddish colour?

Normally  it is associated with traces of elements accompanying quartzite. What can happen? Nothing. What [...]

Why do small black balls appear in the lining when it is demolished?

Carbon monoxide produced of the oxidation of the carbon of the metal spreads across the [...]