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Induction furnace and method for treating metal waste to be stored

A technology of scrap and metal shell, applied in the field of induction furnace, can solve problems such as increasing accidents

Active Publication Date: 2015-10-14
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Said first process leads to undesired mixing between the metal and its slag during pouring, while the second process based on the use of cold crucibles involves the solidification of the metal close to the ingot extraction hole, thus melting the metal and cooling The water has to be very close to each other and therefore the risk of accidents increases due to a failure of the crucible

Method used

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  • Induction furnace and method for treating metal waste to be stored
  • Induction furnace and method for treating metal waste to be stored
  • Induction furnace and method for treating metal waste to be stored

Examples

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Embodiment Construction

[0016] The melting device comprises a multilayer crucible 1 comprising a cylindrical side wall 2 and a bottom 3 adjacent to said side wall 2 . The side walls 2 and the bottom 3 each consist of three layers, functioning from the inside towards the outside first of all the inner layer 4 which is formed by the metal melt present in the crucible 1 during the entire operation (usually several hours). 20 corrosion resistant material; the material must be a poor conductor of electricity to avoid undue weakening of the induced electromagnetic field used to heat the contents of the crucible. The crucible 1 also comprises an intermediate layer 5 made of thermally insulating material to limit the heat flux towards the outside; the insulating layer is slightly compressible without loss of its thermal insulating Inhomogeneous expansion between the outer layer 6 (the middle layer 5 is inserted between the inner layer 4 and the outer layer 6); the middle layer 5 can be a felt made of refract...

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Abstract

The invention relates to an induction melting furnace comprising shell (7) and a lower sole (11) forming the main part of the structure. In addition, the furnace comprises a removable inner crucible (1) formed by an inner layer (4) that is resistant to heat and to the aggressive nature of the molten bath (20), an outer layer (6) defining the crucible, and an intermediate insulating layer (5). The crucible (1) is a single-use crucible and can be stored, together with its charge, in a suitable container. Heat losses are low, even if the shell (7) is cooled. In addition, stresses due to differential thermal expansions are also very low.

Description

technical field [0001] The present invention relates to an induction furnace designed to melt metal scrap and to a treatment method for the same. Background technique [0002] Some metal scrap or other waste materials may be stored in proper containers for extended periods of time due to the hazardous, polluting or toxic components they contain. It is advantageous to pre-melt the scrap in order to reduce its volume. Pre-melting also disperses the more reducible than metal contaminants throughout the volume of the finally obtained ingot and by appropriate compounds (if possible, oxide-based slags) more oxidizable contaminants than metal transferred to the slag. The result obtained is thus a good confinement by reducing the free surface of the metal exposed to corrosion and thus reducing the risk of further oxidation of hazardous elements. [0003] There are many types of melting furnaces. Induction heating is most often used, whereby an excitation coil is arranged around ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/06F27B14/10F27B14/14F27D11/06
CPCF27B14/061F27B14/10F27B14/14F27D11/06F27B2014/0843F27B2014/104F27B14/06B09B3/40
Inventor 罗歇·博恩阿曼德·博纳迪尔
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES