Arrangement for recycling mineral wool waste to mineral wool production

An arrangement for recycling mineral wool waste to mineral wool production, the arrangement comprising:

• at least one melting furnace for melting virgin mineral wool raw material, the at least one melting furnace comprising an inlet for virgin mineral wool raw material and an outlet for molten mineral wool material;
• a mineral wool production line connected to the outlet for molten mineral wool material for producing a mineral wool product from the molten mineral wool material, wherein the mineral wool production line comprises a curing oven;
• and
• a fluidized bed reactor comprising an exhaust gas duct, an inlet for predetermined primary fuel, an inlet for predetermined bed material, and an outlet for an ash material, the ash material comprising bottom ash discharged via a bottom outlet from the fluidized bed reactor or fly ash separated by a particle separator from exhaust gas in the exhaust gas duct or a mixture of the bottom ash and the fly ash, together with particles of bed material removed from the fluidized bed reactor, the fluidized bed reactor further comprising an inlet for mineral wool waste, whereby the ash material comprises fine mineral wool material powdered from the mineral wool waste in the fluidized bed reactor,
• wherein the at least one melting furnace has a further inlet for the ash material so as to use the ash material as a further mineral wool raw material.