Aluminum alloy deironing method

A technology of aluminum alloy and iron remover, which is applied in the field of iron removal of aluminum alloy, can solve the problems of difficult reaction control, unsuitability for industrial production, and difficult operation in the iron removal process, so as to improve the efficiency of slag removal, less harmful gas and low cost Effect

Inactive Publication Date: 2020-09-11
大侠铝业科技(湖州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to design a method for removing iron from aluminum alloys, which overcomes the problems of singleness, difficult operation, and pollution in the current iron removal methods, and overcomes the problems that the iron removal process is difficult to control the reaction and is not suitable for industrial production.

Method used

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  • Aluminum alloy deironing method
  • Aluminum alloy deironing method
  • Aluminum alloy deironing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 Shown, a kind of aluminum alloy iron removal method comprises the steps:

[0033] Step 1, weighing the refining agent, die-casting into blocks and baking:

[0034] Weigh an aluminum block with a mass of 10kg, weigh 20g of refining agent, die-cast the refining agent into a refining agent block, put the refining agent block in an oven, raise the temperature of the oven to 250°C and keep it warm for 60 minutes; the AlF in the refining agent 3 、Na 2 SO 4 、Na 2 AlF 6 、C 2 Cl 6 The mass-number ratio with C powder is 2.75:7.2:6.5:3.25:1.

[0035] Step 2, weigh the modifier and bake:

[0036] Take by weighing 40g of the aluminum-chromium master alloy modifier, put the aluminum-chromium master alloy modifier in the oven, make the temperature of the oven rise to 200°C and keep it warm for 40min; the amount of chromium in the aluminum-chromium master alloy modifier in the modifier The content is 9%.

[0037] Step 3, weigh the iron remover and bake it:

...

Embodiment 2

[0049] A method for removing iron from an aluminum alloy, comprising the steps of:

[0050] Step 1, weighing the refining agent, die-casting into blocks and baking:

[0051] Weigh an aluminum block with a mass of 10kg, weigh 35g of refining agent, die-cast the refining agent into a refining agent block, put the refining agent block in an oven, raise the temperature of the oven to 350°C and keep it warm for 90 minutes; the AlF in the refining agent 3 、Na 2 SO 4 、Na 2 AlF 6 、C 2 Cl 6 The mass-number ratio with C powder is 7.25:8:8.5:4.25:1.5.

[0052] Step 2, weigh the modifier and bake:

[0053] Take by weighing 60g of the aluminum-chromium master alloy modifier, put the aluminum-chromium master alloy modifier in the oven, make the temperature of the oven rise to 300°C and keep it warm for 70min; the amount of chromium in the aluminum-chromium master alloy modifier in the modifier The content is 11%.

[0054] Step 3, weigh the iron remover and bake it:

[0055] Weigh ...

Embodiment 3

[0065] A method for removing iron from an aluminum alloy, comprising the steps of:

[0066] Step 1, weighing the refining agent, die-casting into blocks and baking:

[0067] Weigh an aluminum block with a mass of 10kg, weigh 30g of refining agent, die-cast the refining agent into a refining agent block, put the refining agent block in an oven, raise the temperature of the oven to 300°C and keep it warm for 75 minutes; the AlF in the refining agent 3 、Na 2 SO 4 、Na 2 AlF 6 、C 2 Cl 6 The mass-number ratio with C powder is 5.25:7.5:7.5:3.85:1.25.

[0068] Step 2, weigh the modifier and bake:

[0069] Take by weighing 50g of the aluminum-chromium master alloy modifier, put the aluminum-chromium master alloy modifier in the oven, make the temperature of the oven rise to 250°C and keep it warm for 55min; the amount of chromium in the aluminum-chromium master alloy modifier in the modifier The content is 10%.

[0070] Step 3, weigh the iron remover and bake it:

[0071] Wei...

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Abstract

The invention provides an aluminum alloy deironing method. Chromium is added in a deironing process for modification. As chromium atoms and iron atoms are close in size, the chromium atoms can replaceiron element in a (AlFeSi) phase and a (AlFe) phase to play a role of inhibiting growth of a beta-Fe phase, and the needlelike beta-Fe phase is broken and decomposed; cobalt can enable an iron-enriched phase grows toward a spherical direction, so that it is favorable for reaction of titanium and iron to generate a precipitate of a FeTi(Fe2Ti) compound; a lot of heat is released by magnesium reaction to play a role of catalyzing reaction of titanium and iron. Titanium and impurity iron are reacted to generate a high smelting point and high density FeTi(Fe2Ti) compound, and these iron-enrichedphases are precipitated to the bottom of a crucible under the action of gravity, so that a deironing effect is achieved. The method overcomes the problems that an existing deironing method is single,difficult to operate, pollutant and the like and overcomes the problems that the method is not prone to control reactions in the deironing process and is not suitable for industrial production and thelike.

Description

technical field [0001] The invention relates to the field of iron removal from alloys, in particular to a method for iron removal from aluminum alloys. Background technique [0002] Industrial pure aluminum is a casting alloy raw material with aluminum as the main component, and the Fe content is generally required to be less than 0.2%. However, in actual industrial production, the composition of cast aluminum alloy will inevitably contain a certain amount of impurity Fe, which reduces the performance of the material. [0003] The impurity Fe comes from the raw materials firstly, and secondly because most of the crucibles, smelting tools and molds used in the melting and casting process are Fe-based, so that Fe is brought into the Al liquid. In addition, every remelting of the returned charge will increase the Fe content in the aluminum alloy. After repeated reuse, the Fe content of the alloy will gradually increase, which is particularly prominent in metal mold casting and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06
Inventor 周成双张林李晓韩勇董学民
Owner 大侠铝业科技(湖州)有限公司
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