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Aluminium-alloy iron-removing solvent

A technology of aluminum alloy and flux, which is applied in the field of flux and aluminum alloy iron removal flux, can solve the problems of unsatisfactory removal effect, achieve good iron removal effect, good viscosity and surface tension, and reduce iron content

Active Publication Date: 2008-10-15
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It uses the extrusion force generated by the external electromagnetic field because the conductivity of the iron-rich phase is much smaller than that of the aluminum melt to separate the iron phase impurities in the aluminum melt, but it must be added after adding alloy elements (such as: Mn , Zr, etc.) on the basis of the pre-precipitation of the iron-rich phase in the melt, it can be successfully removed by electromagnetic field, and the iron content after iron removal still reaches 0.41%, and the removal effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Aluminum alloy iron-removing flux of the present invention, its batching quality percentage is composed of:

[0017] 40% sodium chloride, 40% potassium chloride, 5% cryolite, 5% sodium fluoride, 10% boron oxide.

[0018] Preparation method: Put various raw materials of the flux to be prepared into stainless steel containers respectively, then put the container into an oven, heat up to 300°C with the furnace, keep it warm for 3 hours, take it out and directly conduct ball milling. Weigh various batching raw materials according to the batching composition and put them into a ball mill, the ball mill rotates at 200 rpm, ball mills for 2 hours, then dries at a temperature of 200° C. and keeps warm for 3 hours.

[0019] When in use, add 1% of the iron-removing flux of the quality of the aluminum alloy melt according to the above adding method (spray the iron-removing flux into the melt with the gas through a powder sprayer), and leave it to settle for 40 minutes after refini...

Embodiment 2

[0021] Aluminum alloy iron-removing flux of the present invention, its batching quality percentage is composed of:

[0022] 30% Sodium Chloride, 30% Potassium Chloride, 8% Cryolite, 2% Sodium Fluoride, 30% Sodium Borate.

[0023] Preparation method: Put various raw materials of the flux to be prepared into stainless steel containers respectively, then put the container into an oven, heat up to 250°C with the furnace, keep it warm for 3.5 hours, take it out and directly conduct ball milling. Weigh various batching raw materials according to batch composition and load into ball mill, ball mill rotating speed 210 rev / min, ball mill 2 hours, subsequently, dry at 150 ℃ temperature, keep warm for 2.5 hours.

[0024] When in use, add iron-removing flux of 2% of the mass of the aluminum alloy melt according to the adding method above, and leave to settle for 40 minutes after refining. For an aluminum alloy with an iron content of 0.33%, the iron content is reduced from 0.33% to 0.12%...

Embodiment 3

[0026] Aluminum alloy iron-removing flux of the present invention, its batching quality percentage is composed of:

[0027] 25% Sodium Chloride, 34% Potassium Chloride, 7% Cryolite, 10% Sodium Fluoride, 24% Sodium Borate.

[0028] Preparation method: Put the various raw materials of the flux to be prepared into stainless steel containers respectively, then put the container into an oven, heat up to 250°C with the furnace, keep it warm for 4 hours, take it out and directly carry out ball milling. Weigh various batching raw materials according to the batching composition and put them into a ball mill, the speed of the ball mill is 200 rpm, ball milling for 2 hours, then drying at 150° C., and keeping warm for 2.5 hours.

[0029] When in use, add iron-removing flux of 2% of the mass of the aluminum alloy melt according to the adding method above, and leave to settle for 40 minutes after refining. For aluminum alloys with an iron content of 0.33%, the iron content is reduced from...

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PUM

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Abstract

An aluminum alloy deironing flux consists of sodium chloride 20-40wt%, potassium chloride 20-40wt%, cryolite 1-10wt%, sodium fluoride 0-10wt%, boron oxide and / or sodium borate 9-30wt%. It's simple, convenient and cheap and has better effect.

Description

technical field [0001] The invention relates to a flux in the technical field of metal materials, in particular to a flux for removing iron from aluminum alloys using borides. Background technique [0002] Aluminum and its alloys occupy an increasingly important position in industrial production, but due to the process of smelting aluminum, industrial smelting and casting processes, and the increase in waste aluminum and alloys in production and life, there are high levels of impurities in aluminum alloys. iron. Generally speaking, the value of aluminum and its alloys is inversely proportional to its iron content. From the perspective of physical properties, the presence of iron reduces the thermal conductivity and linear expansion coefficient of aluminum alloy; from the perspective of chemical properties, aluminum has a strong affinity with oxygen, but the potential difference between aluminum and iron is large, so the presence of iron reduces the aluminum alloy Corrosion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C21/00
Inventor 曹新乐崔华清刘俊东张雁刘温奎王娟红高建卫疏达王俊孙宝德
Owner SHANGHAI JIAOTONG UNIV
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