The known technique provides for making a mixture by stirring, within a mixing zone, of radioactive ion-exchange resins with powdered metallized fuel which comes in the form of a metallized charge containing the calcium-silicon alloy and the aluminum-magnesium alloy, both powdered, and 2-10 percent of the total mass of the metallized charge of the sodium nitrate or potassium nitrate in which 2-4 percent of the industrial oil of the total mass of the powdered metallized fuel has been added. This is followed by feeding the mixture to the thermal decomposition zone, applying, to the surface of the mixture, the layer of the powdered low-gas contact warming compound or the mixture of powdered aluminum with ВаО₂ and КСlО₃ in amount of 1-2 percent of the total mass of the mixture, igniting this layer provided the oxidizer is present in the thermal decomposition zone, separating the gases outgoing from the accumulating slag within the zone of thermal decomposition and, finally, taking them from the thermal decomposition zone over for filter cleaning.

The new technique is different in that the metallized charge has a specific area of 100-500 m/kg and contains additionally the powered aluminum in amount of 3-10 percent of the total mass of the metallized charge and the powdered silicon in the form of its mixture in any proportion with the powdered silicocalcium, the silicon-silicocalcium mixture content being 50-65 percent of the total mass of the metallized charge, while the powdered aluminum-magnesium alloy content is 30-40 percent of the total mass of the metallized charge. Additionally, a blowing agent is added to the mixture of the radioactive ion-exchange resins and powdered metallized fuel that is being stirred in the mixing zone. The mass percentage of the composition of the mixture resulting therein should be as follows:

the radioactive ion-exchange resins – 75-85 percent;

the powdered metallized fuel – 5-19 percent; and

the blowing agent – 5-10 percent.

The layer to be ignited is applied to cover the entire surface of the mixture, and the air is used as an oxidizer whose presence in the thermal decomposition zone is ensured by making it go down through the layer of the powdered low-gas contact warming composition, or the composition of the powdered aluminum with ВаО₂ and КСlО₃, and the mixture of the radioactive ion-exchange resins, powdered metallized fuel and blowing agent.

The slag produced after its separation from the outgoing gases in the thermal decomposition zone is further fed to the final oxidation zone, the outgoing gases are, then, taken from the thermal decomposition zone, mixed with air and, before being sent for filtering, the resultant gas mixture is fed to the final oxidation zone where it is blown through the slag brought thereto.

The second variant of the technique proposed provides for a specified composition of the blowing agent which can be either dry wood sawdust or Aerosil.

The patent gives a detailed description of the equipment required for the technique proposed.

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