초록 ▼

A system and apparatus for separating different types of particulate materials selectively by subjecting a moving mixture of said materials to a combined applied direct current (D.C.) voltage and radio frequency (RF) electric field, thereby causing the particles to become differentially heated in ac

A system and apparatus for separating different types of particulate materials selectively by subjecting a moving mixture of said materials to a combined applied direct current (D.C.) voltage and radio frequency (RF) electric field, thereby causing the particles to become differentially heated in accordance with the respective dielectric constants and loss factors of the various particles. The separation is accomplished as a result of the differential loss of electrostatic charges impressed upon the different types of materials in accordance with their respective physical and chemical characteristics. During this process, there is no permanent or irreversible alteration in the chemical and physical properties of the particulate materials.

대표청구항 ▼

The method for selectively separating different homogeneous types of particulate materials from a random heterogeneous mixture of two or more of said homogeneous types of materials where the combination dielectric constant and loss factor of each homogeneous type of material is different from that o

The method for selectively separating different homogeneous types of particulate materials from a random heterogeneous mixture of two or more of said homogeneous types of materials where the combination dielectric constant and loss factor of each homogeneous type of material is different from that of the other homogeneous types of material in said mixture, which comprises placing a mass of said heterogeneous materials in motion on a materials carrier and subjecting said moving mass both to an electrostatic charge and to a radio frequency electric field, said materials becoming electrostatically charged and differentially heated in said fields in accordance with their respective combination dielectric constants and loss factors, said materials losing their respective electrostatic charges differentially in different intervals of time proportional to their respective combined dielectric constants and loss factors and consequently falling off said carrier into separate successive receptacles.