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Composite molten salt purification agent and preparation method thereof

A purification agent and molten salt technology, which is applied in the field of compound molten salt purification agent and its preparation, can solve the problems such as the rare research on purification agents, and achieve the effect of good purification ability and reduced surface tension

Inactive Publication Date: 2014-03-19
QINGDAO BAIZHONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But so far, there are still very few research reports on the deep subcooling obtained by purifying superalloys with molten glass purification method and cyclic superheating method, and the research on purifying agents is even rarer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take the following substances: CaF 2 30 parts; AlF 3 25 parts; NagAlF 6 13 parts; 5 parts of NaCl; 8 parts of KCl; 3 parts of CaO; 0.1 part of rare earth.

[0015] Prepare the composite molten salt purifier according to the following method: prepare the molten salt raw material according to the formula, place it in a corundum crucible after stirring evenly, and sinter it in a resistance furnace at 1100K for 4 hours, and pulverize the sintered block purifier Place in a desiccator for later use.

Embodiment 2

[0016] Embodiment 2 gets following material: CaF 2 40 parts; AlF 3 30 parts; NagAlF 6 15 parts; 5 parts of NaCl; 5 parts of KCl; 5 parts of CaO; 0.7 parts of rare earth.

[0017] Prepare the composite molten salt purifying agent according to the following method: prepare the molten salt raw material according to the formula, place it in a corundum crucible after stirring evenly, sinter it in a resistance furnace at 1200K for 5 hours, and pulverize the sintered block purifying agent Place in a desiccator for later use.

Embodiment 3

[0019] CaF 2 42 parts; AlF 3 35 parts; NagAlF 6 17 parts; 7 parts of NaCl; 8 parts of KCl; 5 parts of CaO; 2 servings.

[0020] Prepare the composite molten salt purifier according to the following method: prepare the molten salt raw material according to the formula, place it in a corundum crucible after stirring evenly, and sinter it in a resistance furnace at 1100K for 4 hours, and pulverize the sintered block purifier Store in a desiccator for later use.

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PUM

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Abstract

The present invention discloses a composite molten salt purification agent, which comprises, by weight, 60-70 parts of CaF2 and 35-50 parts of AlF3, and further comprises, by weight, 5-10 parts of Al2O3 and 0.1-2 parts of rare earth. The composite molten salt purification agent preparation method comprises: a, preparing a molten salt raw material according to the formula, and uniformly stirring; and b, placing the uniformly stirred raw material into a corundum crucible, sintering in an electric resistance furnace, crushing the sintered massive purification agent, and placing into a drier to spare. According to the present invention, good purification capability is provided for alloys.

Description

technical field [0001] The invention relates to a composite molten salt purifying agent and a preparation method thereof. Background technique [0002] At present, the alloy purification mostly adopts B 2 o 3 as the main component of molten glass, the reason is B 2 o 3 The melt is relatively clear, and the experiment process is easy to observe. At the same time, it has good fluidity, and the bubbles in the melt can be discharged smoothly. But DZ125 superalloy adopts B 2 o 3 The effect of glass purification is very unsatisfactory. The molten glass purification method and the cyclic superheating method start with the elimination of heterogeneous crystal nuclei in the liquid metal, and can realize deep supercooling of kilogram-level large-volume samples. Therefore, in material research and preparation , has obvious advantages. [0003] But so far, there are very few research reports on the deep subcooling obtained by purifying superalloys with molten glass purification m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH