NOVELTY - Electrothermal treatment of waste materials involves combined simultaneous plasma arc and direct induction heating of preliminary biquetted waste.    USE - For electrothermal treatment of waste materials, including outworn tires, municipal solid waste and medical waste, for regeneration of secondary and natural resources (claimed). For destruction of organic and inorganic waste, containing low or reduced quantities of oxygen and to the large scale conversion of heterogeneous waste.    ADVANTAGE - The method greatly reduces air pollution to meet air quality standards. The waste conversion system is a robust and easy to operate, which minimizes hazardous gaseous emissions and maximizes conversion of a wide range of solid waste into useful energy and produces a product stream that is in a safe, stable form for commercial use or that does not require special toxic waste considerations for desirable. The method is user friendly and highly flexible. The minimal power requirements to treatment of municipal solid waste, outworn truck and vehicle tires, hospital waste with the use of steam plasma optionally with simultaneous oxygen feed into the molten pool to syngas containing predominantly hydrogen and carbon monoxide and low-ash residue of waste inorganic ingredients is not less 1.4, not less 4.1, not less 1.3 kW-h/kg MSW respectively and decrease further as steam plasma is substituted with pure oxygen, thus decreases a required electrical power of a technological line, especially a plasma reactor. The method can handle a wide range of waste, containing metallic, ceramic, salt of inorganic and organic constituents in varying sizes and aggregates states, with those of the plasma arc, which melts the solid constituents of the waste, destroys any molecular structure of hazardous organic waste, sustains a required electric conductivity of the melt in the frequency melter. The method converts waste material using tunable, rapid pyrolysis to provide high purity gases for combustion and can provide a given level of electricity for outside use by utilizing an auxiliary fuel e.g. natural gas, diesel in the gas turbine or internal combustion engine. The method lowers exploitation expenses at the expense of removing of lining capacitive equipment and eliminates secondary waste; eliminates potential probability of exit of hazardous pollutant e.g. dioxins, furans and their derivatives; eliminates potential probability of exit of technological dust including aerosols beyond a technological apparatus zone; simplifies purification of syngas of hazardous mixtures e.g. fluorine, chlorine oxides of sulfur and nitrogen; decreases consumption of construction materials at the expense of full rejection of contact heating of waste at the stages of gasification ad removing melt of inorganic ingredients of waste and increases quality of inorganic products e.g. metals, oxides obtained in the process.    DETAILED DESCRIPTION - Electrothermal treatment of waste materials involves: preparation of arc plasmotrons operating on steam plasma; preparation of molten metal pool for electrothermal treatment of waste material by direct induction heating of ferrous metal scrap or of metal oxide by direct induction heating from a coil of frequency power source; preparation of bottom oxygen lance(s) for transportation of oxygen into the molten pool; briquetting of waste material for electrothermal treatment; transportation of briquetted waste material into electrothermal treatment zone; plasma treatment of briquetted waste material by descending streams of steam plasma, gasification of organic ingredients of waste, melting and transportation of resistant organic and inorganic ingredients of waste into direct induction heating zone; mixing of the waste material with the molten pool, followed by homogenization; electrothermal treatment of waste material briquettes in molten metal pool; permanent excitation of electrical conductivity of melt pool by arc heating to a level required for continuous direct induction heating of the condensed ingredients of the waste material from the coil of frequency power source; continuous unloading of the condensed metallic, ceramic and salt product of electrothermal treatment of the waste material in the form of molten metal and slag; continuous removing of syngas from the waste material electrothermal treatment; rapid cooling of syngas outflow, synthesized during electrothermal treatment of waste material to temperature of 70 - 90degreesC; cleaning of syngas synthesized of technological dust; purification of syngas of toxic mixtures and its isolation in the form of chemical products possessing with commercial cost; transportation of purified combustible gases (syngas) to utilization; utilization of syngas by combustion in gas turbine or in internal combustion engine. An INDEPENDENT CLAIM is included for an apparatus for electrothermal treatment of waste materials and for regeneration of natural resources, including a preparation device comprising a loading hopper and a receptacle for dosing, densification and briquetting of waste material located under the loading hopper; briquetting and transportation device comprising a horizontally arranged hydraulic press; a transportation device comprising a horizontally disposed conduit for transportation of the waste material into the electrothermal treatment zone; an electrothermal treatment device comprising a plasma reactor equipped arc plasmotrons and frequency melter of direct induction heating filled in molten pool installed vertically in line; a power supply comprising controlled thyristorized rectifiers for power supply of arc plasmotrons; a power supply comprising a frequency generator for heating and melting inorganic ingredients of waste materials; oxygen injection device comprising bottom oxygen lance(s) for transportation of oxygen into the molten pool; a mixer for the step (g); an excitation device for reestablishing of electrical conductivity of melt pool after feeding waste material briquettes inside molten metal; a treatment device for removing soot floating up from the molten pool volume by oxygen-containing plasmas; continuous unloading means for pouring off the metallic, ceramic and salt ingredients of the waste material from the molten pool; a cooling and quenching device of outflow of syngas synthesized; a cleaning device for separation of syngas synthesized of technological dust and aerosols; a separation device for extraction of the low-melting hazardous ingredients of the waste material (preferably mercury, zinc, lead, cadmium) from the syngas flow; a purification device to provide fine extraction of toxic mixtures to syngas, such as hydrogen fluoride, hydrogen chloride, oxides of sulfur and nitrogen in the form of chemical products for utilization and for using the syngas for generation of electrical and/or heat energy and a transportation device of syngas to utilization zone.