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Device and method for removing impurity in uranium metal effectively

An impurity and metal technology, applied in the field of uranium metal purification, can solve the problems of no research, high impurity content, no refining and purification process, etc., and achieve the effects of high impurity removal efficiency, reduction of impurity content, and high utilization rate of materials

Active Publication Date: 2016-09-21
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there have been related studies on electron beam smelting of uranium metal, there is no detailed report on the refining and purification process. The metal-type nuclear fuel prepared by vacuum induction melting method has a high impurity content, and the use of electron beam refining is expected to greatly reduce the impurity content and improve the alloy. quality, but there is no related research

Method used

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  • Device and method for removing impurity in uranium metal effectively
  • Device and method for removing impurity in uranium metal effectively
  • Device and method for removing impurity in uranium metal effectively

Examples

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Effect test

example 1

[0063] In the device of this example, the diameter of the melting chamber of the water-cooled copper crucible is 100mm and the outer diameter of the water-cooled copper crucible is 130mm, the depth of the melting chamber is 30mm, the inner surface roughness of the melting chamber is Ra 0.8, and the height of the water-cooled copper crucible is 70mm The outer circumference of the water-cooled copper crucible is provided with a graphite ring, which includes two graphite rings and each graphite ring is spliced ​​by two fan-shaped graphite blocks. The thickness of a single graphite ring is 20mm, and the inner diameter of the graphite ring is 130mm. The outer diameter is 390mm, the graphite ring is 40mm higher than the upper edge of the crucible, the ash content of the graphite ring is not more than 0.08% and the porosity is not more than 22%.

[0064] Carry out smelting purification according to the following steps:

[0065] (1) Furnace loading: the raw material is uranium ingot p...

example 2

[0072] In the device of this example, the diameter of the melting chamber of the water-cooled copper crucible is 100mm and the outer diameter of the water-cooled copper crucible is 130mm, the depth of the melting chamber is 30mm, the inner surface roughness of the melting chamber is Ra 0.8, and the height of the water-cooled copper crucible is 70mm The outer circumference of the water-cooled copper crucible is provided with a graphite ring, which only includes a graphite ring and is spliced ​​by four fan-shaped graphite blocks. The thickness of the graphite ring is 30mm, the inner diameter of the graphite ring is 130mm, and the outer diameter of the graphite ring is 650mm. The graphite ring is 30mm higher than the upper edge of the crucible, the ash content of the graphite ring is not more than 0.08% and the porosity is not more than 22%.

[0073] Follow these steps:

[0074] (1) Furnace loading: the raw material is uranium ingot pre-doped with 1000 μg / g impurity element Al, w...

example 3

[0081] In the device of this example, the diameter of the melting chamber of the water-cooled copper crucible is 160mm and the outer diameter of the water-cooled copper crucible is 200mm, the depth of the melting chamber is 40mm, the inner surface roughness of the melting chamber is Ra 0.8, and the height of the water-cooled copper crucible is 90mm The outer circumference of the water-cooled copper crucible is provided with a graphite ring, which only includes a graphite ring and is spliced ​​by four fan-shaped graphite blocks. The thickness of the graphite ring is 20mm, the inner diameter of the graphite ring is 200mm, and the outer diameter of the graphite ring is 600mm. The graphite ring is 20mm higher than the upper edge of the crucible, the ash content of the graphite ring is not more than 0.08%, and the porosity is not more than 22%.

[0082] Follow these steps:

[0083] (1) Furnace loading: the raw material is uranium ingot pre-doped with 1000 μg / g impurity element Al, ...

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Abstract

The invention discloses a device and method for removing impurity in uranium metal effectively. The device includes an electron-beam melting furnace and a melting crucible, wherein the melting crucible is disposed in a furnace chamber of the electron-beam melting furnace. The melting crucible includes a water cooled copper crucible and a graphite ring sleeved surrounding the water cooled copper crucible, wherein the water cooled copper crucible has a hemispherical smelting chamber. The method uses the device for removing impurity in uranium metal effectively, and includes a plurality of steps such as charging furnace, preforming preheating, preforming smelting, and discharging furnace. Finally, the uranium ingot with low impurity is prepared.

Description

technical field [0001] The invention relates to the technical field of uranium metal purification, more specifically, to a device and method for effectively removing impurities in uranium metal. Background technique [0002] Due to its unique physical and chemical properties, uranium and its alloys play an increasingly important role in the fields of aerospace, energy, and medicine. In terms of energy, nuclear energy has become one of the important solutions to my country's energy crisis, and in-depth research on nuclear materials has become an important guarantee for the development of nuclear energy in my country. However, impurity elements in uranium and its alloys will directly affect the performance of uranium metal, resulting in low material utilization, unstable performance, and increased corrosion. Most of the literatures that can be consulted do not introduce the refining and purification technology of uranium and its alloys in detail, and the prepared uranium and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/02C22B60/02
CPCC22B9/02C22B60/0286
Inventor 陈道明李鱼飞苏斌胡贵超魏怡芸马荣阳家文曾刚
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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