초록 ▼

The melting tub for producing the molten mass from a mixture of raw material is associated with an additional melting unit by means of which a recycled molten mass is obtained from mineral wool waste largely corresponding to the molten mass obtained from the mixture of raw materials in quality and c

The melting tub for producing the molten mass from a mixture of raw material is associated with an additional melting unit by means of which a recycled molten mass is obtained from mineral wool waste largely corresponding to the molten mass obtained from the mixture of raw materials in quality and composition. The recycled molten mass is supplied to the molten mass in the melting tub through a suitable introduction device. The recycling exhaust gas from the additional melting unit is fed to the tub exhaust gas, and the mixture of exhaust gas is utilised for pre-heating combustion air and mixture of raw materials. Due to dividing "preparation of molten mass" into conventional production of molten mass from the mixture of raw materials in the melting tub and concurrent production of molten mass from mineral wool waste in an additional melting unit, molten products and exhaust gas of which are directly supplied to the melting tub, it is possible to utilise mineral wool waste as a recycled starting material in a cost-effective manner without affecting the complicated control of process parameters in conventional production of molten mass.

대표청구항 ▼

[ We claim:] [1.] A method for producing mineral wool including the steps of:introducing mineral wool waste, fuel and air into a combustion fuel melting unit,combusting the fuel and air in the melting unit to melt the mineral wool waste to form a recycled molten material thereby producing a first ex

[ We claim:] [1.] A method for producing mineral wool including the steps of:introducing mineral wool waste, fuel and air into a combustion fuel melting unit,combusting the fuel and air in the melting unit to melt the mineral wool waste to form a recycled molten material thereby producing a first exhaust gas,introducing air, fuel and a raw material into a melting tub,combusting the fuel and air in said melting tub to melt the raw material and produce a molten mass and tub exhaust gas,introducing the recycled molten material and said first exhaust gas into the melting tub such that the molten material mixes with the molten mass and the first exhaust gas mixes with the tub exhaust gas,using the exhaust gas discharged from said melting tub to heat the air introduced into the melting tub,attenuating the molten mass into discontinuous fibers and depositing the fibers to form mineral wool in random orientation, anddiverting a portion of the air heated by the exhaust gas discharged from said melting tub, channelling the portion of air in heat exchange relation with additional air so as to heat the additional air and introducing at least a portion of additional air into said melting unit.