Melting agent for refining alloy in rare earth class and fabrication method

A rare earth compound and rare earth technology, applied in the field of metal materials and metallurgy, to achieve the effect of improving slagging ability, removal rate and strong activity

Active Publication Date: 2006-10-04
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the existing magnesium alloy refining agents, and propose a special purification flux for magnesium rare earth alloys that can effectively remove non-metallic inclusions in the magnesium rare earth alloy melt without increasing the loss of rare earth elements in the alloy , to solve the purification problem of magnesium rare earth alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Magnesium rare earth alloy refining flux composition (mass percentage): 40% calcium chloride (CaCl 2 ), 20% potassium chloride (KCl), 10% sodium chloride (NaCl), 15% barium chloride (BaCl 2 ), 2% calcium fluoride (CaF 2 ), 3% cryolite (Na 3 AlF 6 ), 10% rare earth chloride (RECl 3 ).

[0014] The production method of the magnesium rare earth alloy refining flux is as follows: after the crucible is heated to about 350 ° C, potassium chloride, sodium chloride, calcium chloride, barium chloride and cryolite are added, and after the temperature is partially melted, calcium fluoride is added , heated up to about 770°C, stirred evenly, and poured into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 20 sieve. Then rare earth chloride was added and mixed with a ball mill. Prepared flux should be put into airtight container for standby.

[0015] When in use, when the magnesium alloy is smelted in the resistance crucible f...

Embodiment 2

[0017] Magnesium rare earth alloy refining flux composition (mass percentage): 20% calcium chloride (CaCl 2 ), 10% potassium chloride (KCl), 20% sodium chloride (NaCl), 25% barium chloride (BaCl 2 ), 5% calcium fluoride (CaF 2 ), 10% cryolite (Na 3 AlF 6 ), 10% rare earth fluoride (REF 3 ).

[0018] The production method of the magnesium rare earth alloy refining flux is as follows: after the crucible is heated to about 400 ° C, potassium chloride, sodium chloride, calcium chloride, barium chloride and cryolite are added, and after the temperature is partially melted, calcium fluoride is added , heated up to about 760°C, stirred evenly, and poured into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 30 sieve. Then rare earth fluoride is added and mixed with a ball mill. Prepared flux should be put into airtight container for standby.

[0019] When in use, when the magnesium alloy is smelted in the resistance crucible fu...

Embodiment 3

[0021] Magnesium rare earth alloy refining flux composition (mass percentage): 30% calcium chloride (CaCl 2 ), 25% potassium chloride (KCl), 15% sodium chloride (NaCl), 20% barium chloride (BaCl 2 ), 4% calcium fluoride (CaF 2 ), 3% cryolite (Na 3 AlF 6 ), 3% rare earth carbonate (RE 2 (CO 3 ) 3 ).

[0022] The production method of the magnesium rare earth alloy refining flux is as follows: after the crucible is heated to about 300 °C, potassium chloride, sodium chloride, calcium chloride, barium chloride and cryolite are added, and after the temperature is partially melted, calcium fluoride is added , heated up to about 780°C, stirred evenly, and poured into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 40 sieve. Then rare earth carbonate is added and mixed with a ball mill. Prepared flux should be put into airtight container for standby.

[0023] When in use, when the magnesium alloy is smelted in the resistance c...

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Abstract

This invention provides a Mg rare earth alloy refinery fusing agent and its production method, the sphere of which mass percentage ratio of its chemical components is : 20-40% CaCl, 10-25% KCl, 10-25% NaCl, 15-25% BaCl, 2-5% CaF 3-10% sodium and 3-10% active rare compound which can be: rare earth chloride, rare earth fluoride or rare earth carbonate. This invention regulates the proportion of Cl and F salts and add the slagging constituent sodium and active rare compound, so the fusing agent has a good fusing point, viscosity and humectants and greatly increase its slag eliminating ability.

Description

technical field [0001] The invention relates to a magnesium-rare-earth alloy refining flux and a production method thereof, which are used for removing impurity elements and non-metallic inclusions mixed into the alloy during the smelting process of the magnesium-rare-earth alloy, and belong to the field of metal materials and metallurgy. Background technique [0002] Magnesium alloy is the lightest metal structural material in practical application, and has the characteristics of low density, high specific strength and rigidity, good vibration damping, strong electromagnetic shielding ability and easy recycling. Since the 1990s, industrially developed countries have attached great importance to the research and development of magnesium alloys, and magnesium alloys have been widely used in the fields of national defense, aerospace, automobiles and electronic information industries, and have very broad market prospects. [0003] Magnesium is chemically active, and magnesium a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C23/06
Inventor 吴国华丁文江高洪涛
Owner SHANGHAI JIAOTONG UNIV
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