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Preparation of lithium-lead alloy

A lithium-lead alloy and alloy technology, applied in the field of lithium-lead alloy smelting, can solve problems such as difficult temperature control, difficult local temperature control, and difficult control of Li content in the alloy, so as to promote mass transfer and heat transfer, small diffusion resistance, Eliminates the effect of macrosegregation

Inactive Publication Date: 2009-05-27
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to solve the problem of local temperature control difficulties in the preparation process; to avoid macro segregation and the formation of high melting point compounds in the alloy ; Solve the problem that the content of Li in the alloy is difficult to control
[0005] In the alloy preparation process, the present invention adopts an online temperature detection system and electromagnetic stirring technology, which solves the technical problem that the local temperature is difficult to control in the alloy preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Put the raw material Pb in a closed alumina crucible and pass it with high-purity hydrogen, heat it to 500°C, and keep it warm for 8 hours; do the ingredients according to the design composition of Li and Pb, put Pb into the Mo crucible and put it in a vacuum induction furnace, Li into the vacuum alloy hopper; after the induction furnace is evacuated to 0.5Pa, it is filled with 0.08MPa high-purity argon (>99.999%), and then heated with the furnace to 420 ° C for 30 minutes; through the alloy hopper into the Pb melt in batches Add raw material Li, conduct continuous electromagnetic stirring during the addition process, and ensure that the melt temperature does not exceed 600°C; maintain electromagnetic stirring for 20 minutes after the addition is completed, and then let the melt stand at 550°C for 2.5 hours; online detection of Li and Pb components And add alloy elements according to the test results and return to the previous step, and perform vacuum casting at 300°C af...

example 2

[0010] The raw material Pb was placed in a closed alumina crucible and passed through high-purity hydrogen, heated to 700 ° C, and kept for 9 hours; the ingredients were prepared according to the design composition of Li and Pb, and Pb was loaded into a Mo crucible and placed in a vacuum induction furnace. Put into the vacuum alloy hopper; after the induction furnace is evacuated to 0.8Pa, fill it with 0.1MPa high-purity argon gas (>99.999%), heat the Pb with the furnace to 450 ° C for 40 minutes; add raw material Li to the Pb melt in batches, At the same time, carry out continuous electromagnetic stirring, and ensure that the melt temperature does not exceed 600°C; keep stirring for 15 minutes after the addition is completed, and then let the melt stand at 600°C for 3 hours; detect Li and Pb components online and supplement alloy elements according to the test results And return to the previous step, vacuum casting is carried out at 340°C after the ingredients are qualified.

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PUM

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Abstract

The method relates to a method for smelting lithium-lead alloy, and solves the key problems of difficult control of temperature, component segregation, difficult control of content of Li, and the like during alloy preparation. The method comprises the following steps: 1) putting a raw material Pb into a sealed aluminum oxide crucible, and introducing high-purity hydrogen into the crucible to carry out pretreatment; 2) blending materials according to design components of the Li and the Pb, loading the Pb along with the crucible, and loading the Li into an alloy hopper; 3) introducing high-purity argon gas into a vacuumized smelting furnace, and heating the furnace to melt the raw material Pb; 4) adding the raw material Li in batch, and continuously and electromagnetically stirring the melt at the same time; 5) after the Li is added, stirring the mixture for 10 to 20 minutes, and then keeping the smelt standing for 2 to 4 hours at a temperature of between 550 and 600 DEG C; and 6) detecting components of the melt on line and supplementing alloy elements according to the detected results, pouring the melt in vacuum at a temperature of between 280 and 350 DEG C after the components are qualified, so as to obtain alloy cast ingots according with requirements.

Description

technical field [0001] The invention relates to a lithium-lead alloy smelting method. Background technique [0002] The preparation of lithium-lead alloys that meet the requirements of the nuclear industry, especially the fusion reactor industry, is the first condition for studying key scientific and technical issues of fusion reactors. All countries have carried out the preparation of lithium-lead alloys on an experimental scale and a semi-industrial production scale. However, there are many difficulties in the preparation of lithium-lead alloys, such as the metal Li is very active, easy to oxidize, and violently reacts with water; the alloying rate of Li and Pb is extremely fast during the mixing process, and a large amount of heat is released at the same time, making the temperature of the melt during the preparation process Control becomes difficult; the density difference between Li and Pb is large, and during the preparation process, component segregation or high melt...

Claims

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Application Information

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IPC IPC(8): C22C1/02B22D11/115B22D18/00
Inventor 高胜黄群英陈雅萍朱志强吴宜灿
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI