Apparatus for impinging bulk material with accelerated electrons

An apparatus comprising at least one electron beam generator for generating accelerated electrons with which bulk material particles are impingeable during free fall, wherein

• the at least one electron beam generator is ring-shaped and has a ring axis, wherein the electrons emitted and accelerated by a ring-shaped cathode escape from an electron escape window in a direction of the ring axis;
• the at least one ring-shaped electron beam generator is disposed such that its ring axis is oriented vertically or with an angle deviating from vertical by up to 45°;
• and
• the apparatus further comprises a device for isolating bulk material particles disposed above the at least one ring-shaped electron beam generator, a base wall of the device includes at least one opening from which the bulk material particles fall out and, from there, fall through a ring formed by the at least one electron beam generator, wherein the at least one opening has a size such that always only one bulk material particle after the other falls through the at least one opening, and wherein the lower base wall includes a plurality of openings, which are disposed concentrically around the extended ring axis of the at least one ring-shaped electron beam generator.

An apparatus comprising at least one electron beam generator for generating accelerated electrons with which bulk material particles are impingeable during free fall, wherein

• the at least one electron beam generator is ring-shaped and has a ring axis, wherein the electrons emitted and accelerated by a ring-shaped cathode escape from an electron escape window in a direction of the ring axis;
• the at least one ring-shaped electron beam generator is disposed such that its ring axis is oriented vertically or with an angle deviating from vertical by up to 45°;
• and
• the apparatus further comprises a device for isolating bulk material particles disposed above the at least one ring-shaped electron beam generator, a base wall of the device includes at least one opening from which the bulk material particles fall out and, from there, fall through a ring formed by the at least one electron beam generator, wherein at least one cylindrical electron reflector that extends through the ring opening of the at least one ring-shaped electron beam generator.