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Refining agent for aluminum or aluminum alloy smelting and application thereof

A refining agent and aluminum alloy technology, applied in the field of aluminum alloy smelting and processing, to achieve strong wetting ability, improve refining ability, and improve the effect of degassing

Inactive Publication Date: 2021-03-09
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a refining agent for aluminum or aluminum alloy smelting and its application, so as to solve the limitation problem that the refining agent in the prior art directly uses rare earth metal powder as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In terms of weight percentage, the aluminum alloy refining agent is: NaCl and KCl (equal molar ratio mixture) is 20%, KNO 3 25%, graphite powder 3%, 2.3NaF·AlF 3 20%, Na 2 SiF 6 22%, C 2 Cl 6 6.6%, 3.4% scandium (as ScF 3 form added).

[0041] The preparation method of the above-mentioned aluminum alloy refining agent is as follows: separately crush each component in the above-mentioned aluminum alloy refining agent, and pass through a 100-mesh screen; put each component in an oven, bake at 240°C for 3 hours, and cool to 50°C. After the temperature is below ℃, put them into airtight moisture-proof containers for later use; accurately weigh each component according to the above weight percentage, put it into a mixer, mix well, weigh and pack to obtain a refining agent.

[0042] Weigh each raw material according to the composition required by aluminum-magnesium alloy 5A06. The melting of the alloy is carried out in a medium-frequency induction furnace with a melting...

Embodiment 2

[0044] In terms of weight percentage, the aluminum alloy refining agent is: NaCl and KCl (equal molar ratio mixture) is 17%, KNO 3 29%, graphite powder 3.5%, 2.1NaF·AlF 3 18%, Na 2 SiF 6 25%, C 2 Cl 6 6.5%, 1% scandium (as ScF 3 form added).

[0045] During refining, 0.5% of the above-mentioned refining agent based on the weight of the aluminum-magnesium alloy melt was added, and the H content of the refined aluminum alloy melt was determined to be 0.093mL / 100.00g aluminum. The alloy ingot obtained after casting the melt has fine grains and uniform distribution without slag and inclusions.

Embodiment 3

[0047] In terms of weight percentage, the aluminum alloy refining agent is: NaCl and KCl (equal molar ratio mixture) is 18%, KNO 3 29%, graphite powder 3%, 2.8NaF·AlF 3 22%, Na 2 SiF 6 17%, C 2 Cl 6 6%, 5% Scandium (as ScF 3 form added).

[0048] During refining, 0.5% of the above-mentioned refining agent based on the weight of the aluminum-magnesium alloy melt was added, and the H content of the refined aluminum alloy melt was measured to be 0.068mL / 100.00g aluminum. The alloy ingot obtained after casting the melt has fine grains and uniform distribution without slag and inclusions.

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Abstract

The invention provides a refining agent for aluminum or aluminum alloy smelting and application thereof. The refining agent comprises NaCl, KCl, mNaF.AlF3 with the weight percentage of 10%-30%, Na2SiF6 with the weight percentage of 10%-30%, C2Cl6 with the weight percentage of 2%-8%, KNO3 with the weight percentage of 25%-45%, graphite powder with the weight percentage of 3%-8% and scandium with the weight percentage of 1%-5%, wherein the total weight percentage of NaCl and KCl is 10%-25%, scandium exists in the refining agent in the form of scandium salt which is a halogen-containing compound,and m in mNaF.AlF3 is 2.1-3.0. When the refining agent is applied to aluminum or aluminum alloy refining, the degassing and solid inclusion removing capacity of the refining agent can be remarkably improved through the synergistic effect of all the components in the refining agent.

Description

technical field [0001] The invention relates to the technical field of smelting and processing of aluminum alloys, in particular to a refining agent for smelting aluminum or aluminum alloys and an application thereof. Background technique [0002] During the process of electrolysis, smelting, and transfer, aluminum melt or aluminum alloy melt inevitably reacts with the medium it contacts to form gas and solid inclusions. The gas and solid inclusions in it will reduce the fluidity of aluminum melt or aluminum alloy melt, cause a series of defects such as casting pores, shrinkage cavities, and porosity, and reduce the mechanical properties and performance of castings. Therefore, the purification treatment of aluminum and aluminum alloy melts is one of the important means to ensure the quality of aluminum and aluminum alloy castings. [0003] The flux purification method is a common method for purifying aluminum and aluminum alloy melts, and the type of flux used directly affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/06C22B9/10C22C1/06
CPCC22B21/062C22C1/06
Inventor 杜尚超李诺韩国强姚心付云枫王玮玮吕东
Owner CHINA ENFI ENGINEERING CORPORATION
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