The invention relates to an electromagnetic wave irradiation reactor (fixed, mobile or portable) suitable for the physical, dynamic, continuous conditioning of materials having the ability to absorb electromagnetic radiation, which need to be treated through electromagnetic irradiation, without coming into contact with the electromagnetic source. In particular, this invention aims to treat those materials which tend to reflect such radiations, which are translucent or difficult to penetrate to irradiation or simply dirty. The invention mainly exploits the postulates of Lambert, and Stefan-Boltzmann, that is, the physical assumptions of the transmission of electromagnetic energy by radiation and in particular the angle, concentration and proximity of the emission of energy between emitter and receiver (which varies with the square of the distance) and the intensity of the emission (which varies with the 4th power of the temperature).