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Boron-10 zirconium target material decomposition recycling method

A technology of boric acid and powder, which is applied in the chemical field, can solve the problems affecting the decomposition of zirconium boride and the strong corrosion effect of boron-10 acid, and achieve the effects of high recovery rate, convenient operation and high product purity

Active Publication Date: 2019-07-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that below 1300°C, zirconium boride decomposes to form a dense zirconia protective film, which affects the further decomposition of zirconium boride
[0007] In addition, when the temperature is higher than 1300°C, boron-10 acid cannot be recovered due to the strong corrosion effect of boron-10 acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Break the boron-10 zirconium target material and pass through a 160-mesh sieve. The particle size of the boron-10 zirconium powder is less than 0.1mm. Take 200g of boron-10 zirconium powder after sieving and put it into a quartz crucible. The quartz crucible filled with boron-10 zirconium is placed in the constant temperature zone of the quartz tube furnace, and the two ends are kept warm with zirconia sheets;

[0043] Raise the temperature to 900°C at a heating rate of 100°C / h;

[0044] Quickly pass 10ml of deionized water to make it gasify, then continue to pass the water, and adjust the water flow to 1-5ml / min;

[0045] Introduce oxygen, the oxygen flow rate is 3ml / min;

[0046] Constant temperature 60h;

[0047] Cool down to room temperature at a cooling rate of 100°C / h;

[0048] Take out the zirconia sheet and quartz crucible in the reverse order of the installation procedure;

[0049] Clean the quartz tube and zirconia sheet with deionized water, and recover t...

Embodiment 2

[0055] Break the boron-10 zirconium target material and pass through a 160-mesh sieve. The particle size of the boron-10 zirconium powder is less than 0.1mm. Take 200g of boron-10 zirconium powder after sieving and put it into a quartz crucible. The quartz crucible filled with boron-10 zirconium is placed in the constant temperature zone of the quartz tube furnace, and the two ends are kept warm with zirconia sheets;

[0056] Raise the temperature to 800°C at a heating rate of 100°C / h;

[0057]Quickly pass 10ml of deionized water to make it gasify, then continue to pass the water, and adjust the water flow to 1-5ml / min;

[0058] Introduce oxygen, the oxygen flow rate is 3ml / min;

[0059] Constant temperature 60h;

[0060] Cool down to room temperature at a cooling rate of 100°C / h;

[0061] Take out the zirconia sheet and quartz crucible in the reverse order of the installation procedure;

[0062] Clean the quartz tube and zirconia sheet with deionized water, and recover th...

Embodiment 3

[0068] The boron-10 zirconium target is crushed and passed through a 160-mesh sieve. The particle size of the boron-10 zirconium powder is less than 0.1 mm. Take 200 g of boron-10 zirconium powder after sieving and put it into a quartz crucible. The quartz crucible filled with boron-10 zirconium is placed in the constant temperature zone of the quartz tube furnace, and the two ends are kept warm with zirconia sheets;

[0069] Heat up to 1000°C at a heating rate of 100°C / h;

[0070] Quickly pass 10ml of deionized water to make it gasify, then continue to pass the water, and adjust the water flow to 1-5ml / min;

[0071] Introduce oxygen, the oxygen flow rate is 3ml / min;

[0072] Constant temperature 60h;

[0073] Cool down to room temperature at a cooling rate of 100°C / h;

[0074] Take out the zirconia sheet and quartz crucible in the reverse order of the installation procedure;

[0075] Clean the quartz tube and zirconia sheet with deionized water, and recover the cleaning s...

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Abstract

The invention provides a boron-10 zirconium target material decomposition recycling method. The boron-10 zirconium target material decomposition recycling method comprises following steps: boron-10 zirconium is introduced into a device not reactive with boric acid, and thermal insulation treatment is carried out for 40 to 60h at 800 to 1000 DEG C at steam and oxygen environment. Based on the boron-10 zirconium target material decomposition recycling method, decomposition of boron-10 zirconium at a low temperature can be realized, and boron-10 acid is obtained. The process of the method is simple; operation is convenient; and yield and product purity are high.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to a low-temperature decomposition method of boron-10 zirconium. Background technique [0002] Boron-10 zirconium (Zr 10 B 2 ) is one of the key components in the core-related components of AP1000 and AP1400. It has the functions of controlling the reactivity of the core and providing the neutron source required for core start-up, so as to realize the stable and safe start-up, operation (regulation) of the nuclear power plant, and Stop the function of the reactor. [0003] At present, the core-related components of the AP1000 nuclear power plant under construction are all purchased from Westinghouse in the United States. With the continuous increase of domestic AP1000 nuclear power plants, if the import method continues to be adopted in the future, my country's AP1000 nuclear power development award will continue to be severely restricted by the United States. , is not conduci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10C01B35/04
CPCC01B35/1054C01B35/04C01P2006/88Y02P10/20
Inventor 邹宇琦张兆泉范武刚
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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