Method and device for preheating and initially melting glass raw materials

Abstract

The invention provides a method and device for preheating and melting glass raw materials. The preheating and initially melting method comprises the following steps: placing glass particles inside a cold crucible furnace body, placing a conductor heating body on the glass particles, and sleeving the cold crucible furnace body with an induction coil; starting a high-frequency power supply electrically connected with the induction coil to generate a high-frequency electromagnetic field; gradually increasing the output power of the high-frequency power supply, so that the conductor heating body in a cold crucible is gradually heated up under the action of the high-frequency electromagnetic field until the conductor heating body burns and releases a large amount of heat, thereby melting glassparticles after absorbing the heat and forming a molten pool, wherein the molten pool is continuously expanded until all glass particles in the cold crucible are completely molten. According to the invention, the conductor heating body is arranged on the glass particles in the cold crucible as a starting material, and the conductor heating body is rapidly heated up and burned under the action of ahigh-frequency electromagnetic field, so that the released heat not only forms the glass molten pool, but also accelerates the whole starting process, and no additional heating equipment is needed for the cold crucible.

Description

technical field [0001] The invention relates to the technical field of nuclear applications, in particular to a method for preheating and starting a glass raw material, and a device for preheating and starting a glass raw material. Background technique [0002] In the process of nuclear energy utilization, it is necessary to properly dispose of a large amount of radioactive waste, especially high-level radioactive liquid waste, so as to minimize its impact on the environment. The usual practice is to reduce the volume of these radioactive wastes and solidify them, and then bury them in deep geological disposal sites far away from the human living circle. Among them, the cold crucible vitrification technology is one of the currently used solidification technologies. Its basic principle is to use high-frequency induction heating to melt the calcined radioactive waste liquid and the glass material to form a vitrified body. Because this kind of solidified waste has good chemica...

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Problems solved by technology

[0005] However, the inventors have found that in the prior art, additional heating equipment is required for the cold crucible to preheat and start melting glass raw materials, which has problems such as high energy consumption, long time consumption, and high cost.

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