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Fine grained aluminum ingot and method for manufacturing the same

An aluminum ingot and fine-grain technology, applied in the field of aluminum alloy manufacturing, can solve the problems of source limitation, the number of days and methods of titanium oxide addition, and the inability to guarantee the impurity content of low-titanium aluminum alloys.

Inactive Publication Date: 2007-08-22
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] "Feasibility analysis and research on the production of low-titanium aluminum alloys by electrolysis" (Song Tianfu, Journal of Zhengzhou University (Natural Science Edition), 2004, 36(1): 37-40) introduces a low-titanium aluminum alloy produced by electrolysis. The addition of titanium oxide in the production process was not added according to the number of days and methods of this technology, and the selection of titanium oxide was not carried out in accordance with the requirements of this technology. Therefore, the source of raw material titanium oxide is limited, and the low-titanium aluminum alloy cannot be guaranteed Impurity content in medium≤0.3%

Method used

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  • Fine grained aluminum ingot and method for manufacturing the same
  • Fine grained aluminum ingot and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] By adding titanium dioxide pigment (TiO 2 98%) and alumina to produce a fine-grained aluminum ingot with a titanium mass fraction of 0.03%. The titanium dioxide pigment is added in one day, and the titanium dioxide pigment should be added to the feed box of the electrolytic cell after the aluminum is tapped, and fully mixed with the alumina. The mass fraction of the chemical composition of the mixture of titanium dioxide pigment and aluminum oxide used for electrolysis is:

[0050] Alumina (Al 2 o 3 ) 98.185%

[0051] Titanium oxide (TiO 2 ) 0.214%

[0052] Impurities in alumina 1.596%

[0053] Impurities in titanium oxide 0.005%

[0054] The mass fraction of each component of the electrolyte in the cryolite system is:

[0055] Molecular ratio (NaF:AlF 3 ) 2.36

[0056]Sodium Fluoride (NaF) 46.97%

[0057] Aluminum fluoride (AlF 3 ) 39.81%

[0058] Calcium Fluoride (CaF 2 ) 3.56%

[0059] Magnesium fluoride (MgF 2 ) 1.14%

[0060] The electrolytic proce...

Embodiment 2

[0070] By adding natural rutile concentrate (TiO 2 94%) and alumina to produce a fine-grained aluminum ingot with a mass fraction of titanium of 0.10%. The natural rutile concentrate is added in two days, and should be added to the feed box of the electrolytic cell after the aluminum is tapped, and fully mixed with the alumina.

[0071] The mass fraction of each component of the electrolyte in the cryolite system is:

[0072] Molecular ratio (NaF:AlF 3 ) 2.39

[0073] Sodium Fluoride (NaF) 46.96%

[0074] Aluminum fluoride (AlF 3 ) 39.34%

[0075] Calcium Fluoride (CaF 2 ) 3.90%

[0076] Magnesium fluoride (MgF 2 ) 0.90%

[0077] The electrolytic process parameters are:

[0078] Electrolysis temperature 948℃

[0079] Electrolyzer working voltage 4.28V

[0080] Aluminum liquid height 19cm

[0081] Electrolyte height 23cm

[0082] The mass fraction target value of titanium in molten aluminum on the first day is 0.05%. Natural rutile concentrate (TiO 2 94%) and th...

Embodiment 3

[0101] By adding artificial rutile (TiO 2 90%) and alumina to produce a fine-grained aluminum ingot with a titanium mass fraction of 0.08%. The synthetic rutile was added over two days and mixed well with the alumina.

[0102] The mass fraction of each component of the electrolyte in the cryolite system is:

[0103] Molecular ratio (NaF:AlF 3 ) 2.40

[0104] Sodium Fluoride (NaF) 47.92%

[0105] Aluminum fluoride (AlF 3 ) 39.99%

[0106] Calcium Fluoride (CaF 2 ) 3.86%

[0107] Magnesium fluoride (MgF 2 ) 2.14%

[0108] The electrolytic process parameters are:

[0109] Electrolysis temperature 940℃

[0110] Electrolyzer working voltage 4.41V

[0111] Aluminum liquid height 20cm

[0112] Electrolyte height 21cm.

[0113] The mass fraction target value of titanium in molten aluminum on the first day is 0.05%. Artificial rutile (TiO 2 90%) and the mass fraction of the chemical composition of the mixture of aluminum oxide is:

[0114] Alumina (Al 2 o 3 ) 97.854%...

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Abstract

This invention provides a cryptomere aluminum ingot, its components quality fraction is that Al 99.5~99.9%, Ti 0.01~0.20%, impurity<=0.03%. it also provides method of preparing cryptomere aluminum ingot. On the condition of electrolytic aluminum production facility and manufacturing technique not changed, a certain rate titanium oxide is added to electrolyte, through different titanium adding days, cryptomere aluminum ingot of quality fraction is 0.01~0.20% of titanium is got by using alumina-titanium oxide-cryolite fusion electrolysis eutectrol process. Because of its special titanium adding mode, the production cost is cheap, product crystal grain thinning capability is strong, high temperature resistant capability is strong, long residual action is good, heritability is good and titanium recovery is high.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy manufacturing, and in particular relates to a method for manufacturing fine-grained aluminum ingots. Background technique [0002] Aluminum is one of the most abundant elements on the earth. The development and utilization of aluminum has a very profound impact on the development of human society. It has long been discovered that aluminum can form alloys with many metals, and some aluminum alloys have high tensile strength, which can even exceed structural steel, and still maintain the advantages of light weight. Especially with the development of modern civilization, the status of aluminum alloy in industrial manufacturing, construction, and automobile industry is getting higher and higher, and the consumption is increasing. According to the statistics of the aluminum alloy grades in GB / T 3190 "Chemical Composition of Deformed Aluminum and Aluminum Alloys" and GB / T 8733 "Casting Aluminum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C25C3/06
Inventor 左秀荣刘忠侠宋天福王明星翁永刚刘志勇杨昇
Owner ZHENGZHOU UNIV
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