Abstract: An arrangement for producing a bulk material consisting substantially of foamed or blown mineral or oxide particles by thermal treatment of a bulk material of basic particles. The arrangement includes NIR halogen radiators for generating a NIR radiation field of radiation with an active component in a near infrared, NIR, range having a wavelength in a range between 0.8 ?m and 1.5 ?m and which has a power density of at least 50 kW/m2 for thermally treating the basic particles, a conveying device for transporting a layer or stream of the bed of basic particles through the radiation field, and a controller that controls heating of the bed of basic particles such that a maximum temperature in the layer or stream is in a temperature range between 600 and 1500° C.

Abstract: A method for producing a bulk material consisting substantially of foamed or blown mineral or oxide particles by thermal treatment of a bulk material of basic particles, characterized in that the thermal treatment includes transport of a transversely conveyed or horizontal layer or of a free flow of the bulk material through a radiation field, the substantial active component of which lies in the near infrared range (NIR), and which has a power density of at least 50 kW/m2.

Abstract: A method for producing a bulk material consisting substantially of foamed or blown mineral or oxide particles by thermal treatment of a bulk material of basic particles, characterized in that the thermal treatment includes transport of a transversely conveyed or horizontal layer or of a free flow of the bulk material through a radiation field, the substantial active component of which lies in the near infrared range (NIR), and which has a power density of at least 50 kW/m2.