Oxy:fuel melting furnace

An oxy:fuel melting furnace comprising a rotatable furnace body, a normally stationary non-rotatable furnace roof for fitting on the furnace body, dynamic sealing means for dynamically sealing the furnace roof on the furnace body such that the furnace body can rotate with respect to the furnace roof, tiltable support means for supporting the furnace body such that tilting of the support means causes tilting of the furnace body for tapping and slagging, moving means for moving the furnace roof such that the furnace roof is able to be lowered onto the furnace body when the furnace body is to be titled for the tapping and slagging, and such that the furnace roof is able to be raised from the furnace body in order to allow the rotation of the furnace body relative to the furnace roof during melting of material introduced into the furnace body, heating means which is mounted on the furnace roof and which is for providing heat for the melting, and pre-heating means for pre-heating the material prior to its introduction into the furnace body, and the oxy:fuel melting furnace being such that at least one of the heating means and the pre-heating means burns oxy:fuel.