CN1465749A - Spinel type nickel aluminate base metal ceramic inert electrode - Google Patents

Spinel type nickel aluminate base metal ceramic inert electrode Download PDF

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Publication number
CN1465749A
CN1465749A CNA021324875A CN02132487A CN1465749A CN 1465749 A CN1465749 A CN 1465749A CN A021324875 A CNA021324875 A CN A021324875A CN 02132487 A CN02132487 A CN 02132487A CN 1465749 A CN1465749 A CN 1465749A
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nickel
nial
nife
alloy
base metal
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CN1301344C (en
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邱竹贤
王兆文
高炳亮
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Northeastern University China
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Northeastern University China
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Abstract

The present invention relates to a spinelle type nickel aluminate base metal ceramic indifferent electrode for aluminium electrolysis. Said indifferent electrode component includes nickel aluminte base metal ceramics or nickel aluminate and nickel ferrite composite metal ceramics and copper-nickel series multicomponent alloy powder, and the above-mentioned materials and undergone the process of cold-press sintering or hot pressing method so as to obtain the indifferent anode with a certain size and thickness. The purity of said aluminium product is 99.6% Al.

Description

Spinel type nickel aluminate base metal ceramic inert electrode
Affiliated technical field
The invention belongs to the used for aluminium electrolysis electrode, particularly a kind of spinel type nickel aluminate base metal ceramic inert electrode.
Background technology
Existing metallurgy method for aluminum is still sodium aluminum fluoride one alumina molten salt electrolysis method; The main equipment of aluminium metallurgy is an electrolyzer, and itself still has many shortcomings its technology: capacity usage ratio is quite low, less than 50%; Negative electrode is consumptive, produces the carbon anode that aluminium per ton need consume 450～500kg; The carbonaceous sidewall is corroded easily, and the useful life period of electrolyzer is short; Have only a reaction surface to produce aluminium because its electrode is horizontally disposed, cause electrolyzer production efficiency very low, simultaneously also to a large amount of CO of environmental emission 2, obnoxious flavour such as CO and glance coal.The use of inert anode can be avoided above-mentioned shortcoming, and inert anode does not in use consume substantially, and expellant gas is oxygen rather than carbon dioxide, can also improve Aluminium Electrolysis and level of automation simultaneously.Existing inert anode is nickel ferrite based (NiFe mostly 2O 4) cermet material, this material is in use still by electrolyte corrosion, makes dissolved ferric iron in the anode in ionogen, and these iron are separated out at negative electrode again, and the purity of aluminium is affected.Therefore this material is restricted in industrial production.
Summary of the invention
Deficiency at prior art exists the invention provides a kind of spinel type nickel aluminate base metal ceramic inert electrode.
The present invention is a kind of spinel type nickel aluminate base metal ceramic inert electrode material powder, makes aluminum electrolysis inertia anode through cold-rolled sintered or hot press molding method, uses in aluminium cell.
Its composition of this inert anode comprises nickel aluminate (NiAl 2O 4) based ceramic metal or nickel aluminate and nickel ferrite based magnetic loaded (NiFe 2O 4) composite cermet and copper-nickel (Cu-Ni) alloy or compositions such as copper-Yin-nickel (Cu-Ag-Ni), copper-Yin-nickel-aluminium (Cu-Ag-Ni-Al) alloy; Wherein the weight percent of the composite cermet of nickel aluminate and nickel ferrite based magnetic loaded formation is: NiAl 2O 4: NiFe 2O 4=30-70%: 30-70%, both sums are 100, and above-mentioned sintering metal and copper nickel series alloy will be ground to form the use of 150～320 order powder, and it has 6 kinds of Different Weight per-cent prescriptions, and both weight sums are 100, that is:
a.(NiAl 2O 4)∶(Cu-Ni)＝75-95％∶5-25％
b.(NiAl 2O 4)∶(Cu-Ag-Ni)＝75-95％∶5-25％
c.(NiAl 2O 4)∶(Cu-Ag-Ni-Al)＝75-95％∶5-25％
d.(NiAl 2O 4+NiFe 2O 4)∶(Cu-Ni)＝75-95％∶5-25％
e.(NiAl 2O 4+NiFe 2O 4)∶(Cu-Ag-Ni)＝75-95％∶5-25％
f.(NiAl 2O 4+NiFe 2O 4)∶(Cu-Ag-Ni-Al)＝75-95％∶5-25％
Above-mentioned prescription interalloy is basic Ni 10-50% with Cu
Ag 0-20％
Al 0-20% presses above-mentioned composite metal ceramic behind the certainweight per-cent uniform mixing and the alloy powder of certain weight ratio uniform mixing more at last again, adopt cold-rolled sintered or hot pressed method to make the crucible type of certain size, wall thickness or the aluminum electrolyzing cell used inert anode of other solid shapes then, be spinel type nickel aluminate base metal ceramic inert electrode of the present invention.
Owing to adopt the inert anode of above-mentioned this composition, thereby overcome the deficiencies in the prior art.Inert anode in use corrodes slightly, substantially do not consume, the chemical reaction expellant gas is an oxygen, rather than harmful smokes such as carbon monoxide, carbonic acid gas, also improved the level of automation and the labour productivity of Aluminium Electrolysis simultaneously, prolonged the life-span of electrolyzer, Energy resources have been saved, reduced production cost, guaranteed the quality of aluminium product, the purity of aluminium can reach 99.6%.
Embodiment example 1
With NiAl 2O 4Powder: NiFe 2O 4Powder=60%: 40% mixes, and with the 200 purpose Cu-Ag-Ni alloy powder uniform mixing that make, weight percent is NiAl again 2O 4And NiFe 2O 4Composite metal ceramic: Cu-Ag-Ni alloy powder=88%: 12%, adopt cold-rolled sintered method to make to be of a size of the crucible type electrode of 60*60mm, wall thickness 5mm then, in homemade electrolyzer, carry out electrolysis, electrolyte ingredient: Al 2O 35%, CaF 23%, MgF 23%, NaCl3%, all the other are that molecular ratio is 2.1 industrial sodium aluminum fluoride.Electrolysis temperature is 900 ℃, and anodic current density is 0.85A/cm 2Electrolysis 24 hours; Anodic corrosion is slight, and the purity that obtains aluminium is 99.6%Al.Example 2
With NiAl 2O 4Powder: NiFe 2O 4Powder=50%: 50% uniform mixing, with the 200 order Cu-Ag-Ni alloy powder uniform mixing that make, its weight percent is NiAl again 2O 4And NiFe 2O 4Composite metal ceramic: Cu-Ag-Ni alloy powder=80%: 20%, then, adopt cold-rolled sintered method to make and be of a size of 60*60mm, wall thickness is the crucible type electrode of 5mm, carries out electrolysis in homemade electrolyzer, electrolyte ingredient is: Al 2O 33%, CaF 23%, MgF 25%, LiF3%,
All the other are that molecular ratio is 2.1 industrial sodium aluminum fluoride.
Electrolysis temperature is 900 ℃
Anodic current density is 0.85A/cm 2
Electrolysis 48 hours
Anodic corrosion is slight, the purity 99.6%Al of aluminium.

Claims (3)

1. a spinel type nickel aluminate base metal ceramic inert electrode is characterized in that this noble electrode composition comprises nickel aluminate base metal ceramic (NiAl 2O 4) or nickel aluminate and nickel ferrite based magnetic loaded (NiFe 2O 4) composite cermet and copper-nickel (Cu-Ni) alloy or copper-Yin-nickel (Cu-Ag-Ni), copper-Yin-nickel-aluminium (Cu-Ag-Ni-Al) alloy composition; Wherein the weight percent of the composite cermet of nickel aluminate and nickel ferrite based magnetic loaded formation is: NiAl 2O 4: NiFe 2O 4=30-70%: 70-30%, both sums are 100, and above-mentioned sintering metal and copper nickel series alloy will be ground to form the use of 150～320 order powder, and it has 6 kinds of Different Weight per-cent prescriptions, and both weight sums are 100, that is:
a.(NiAl 2O 4)∶(Cu-Ni)＝75-95％∶5-25％
b.(NiAl 2O 4)∶(Cu-Ag-Ni)＝75-95％∶5-25％
c.(NiAl 2O 4)∶(Cu-Ag-Ni-Al)＝75-95％∶5-25％
d.(NiAl 2O 4+NiFe 2O 4)∶(Cu-Ni)＝75-95％∶5-25％
e.(NiAl 2O 4+NiFe 2O 4)∶(Cu-Ag-Ni)＝75-95％∶5-25％
F. (NiAl 2O 4+ NiFe 2O 4): (Cu-Ag-Ni-Al)=75-95%: 5-25% is last, with above-mentioned meet the sintering metal powder by certainweight per-cent uniform mixing after again with the alloy powder of certain weight ratio uniform mixing again, adopt cold-rolled sintered or hot pressed method to make the crucible type of certain size, wall thickness or the aluminum electrolyzing cell used inert anode of other solid shape then, be used for aluminium cell.
2. spinel type nickel aluminate base metal ceramic inert electrode according to claim 1 is characterized in that the composite cermet anodic weight percent that nickel aluminate and nickel ferrite based magnetic loaded are made into is: NiAl 2O 4: NiFe 2O 4=30-70%: 30-70%,
3. spinel type nickel aluminate base metal ceramic inert electrode according to claim 1 is characterized in that the weight percent of the Cu-Ni base system row alloy that adopts in sintering metal anode and the anodic metallographic phase is: NiAl 2O 4Based ceramic metal: Cu-Ni base system row multicomponent alloy=80-88%: 12-20%, NiAl 2O 4With NiFe 2O 4Composite cermet: Cu-Ni base system row multicomponent alloy=80-88%: 12-20%.
CNB021324875A 2002-06-28 2002-06-28 Spinel type nickel aluminate base metal ceramic inert electrode Expired - Fee Related CN1301344C (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100507091C (en) * 2005-11-10 2009-07-01 东北大学 Metal-base composite material inert anode for aluminium electrolysis and preparation method thereof
CN101713083B (en) * 2008-06-02 2011-09-28 王飚 Molten-salt electrolytic aluminum inert anode, preparation method and application thereof
CN102732765A (en) * 2012-07-18 2012-10-17 武汉科技大学 Metal ceramic matrix used as aluminium electrolyzing inert anode and preparation method thereof
CN103030387A (en) * 2013-01-08 2013-04-10 武汉科技大学 NiFe2O4 ceramic substrate and preparation method thereof
CN103526273A (en) * 2013-09-27 2014-01-22 华侨大学 Novel alkaline zincate electrogalvanizing anode and preparation method thereof
CN107532251A (en) * 2015-04-03 2018-01-02 力拓艾尔坎国际有限公司 Cermet electrodes material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1256457A (en) * 1985-05-20 1989-06-27 Michel Chevigne Production of reaction-sintered articles and reaction- sintered articles
ATE70094T1 (en) * 1986-08-21 1991-12-15 Moltech Invent Sa METAL-CERAMIC COMPOSITE MATERIAL, MOLDING AND METHOD OF PRODUCTION.
US4871437A (en) * 1987-11-03 1989-10-03 Battelle Memorial Institute Cermet anode with continuously dispersed alloy phase and process for making
US6423204B1 (en) * 1997-06-26 2002-07-23 Alcoa Inc. For cermet inert anode containing oxide and metal phases useful for the electrolytic production of metals

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100507091C (en) * 2005-11-10 2009-07-01 东北大学 Metal-base composite material inert anode for aluminium electrolysis and preparation method thereof
CN101713083B (en) * 2008-06-02 2011-09-28 王飚 Molten-salt electrolytic aluminum inert anode, preparation method and application thereof
CN102732765A (en) * 2012-07-18 2012-10-17 武汉科技大学 Metal ceramic matrix used as aluminium electrolyzing inert anode and preparation method thereof
CN103030387A (en) * 2013-01-08 2013-04-10 武汉科技大学 NiFe2O4 ceramic substrate and preparation method thereof
CN103526273A (en) * 2013-09-27 2014-01-22 华侨大学 Novel alkaline zincate electrogalvanizing anode and preparation method thereof
CN107532251A (en) * 2015-04-03 2018-01-02 力拓艾尔坎国际有限公司 Cermet electrodes material
CN107532251B (en) * 2015-04-03 2019-08-06 力拓艾尔坎国际有限公司 Cermet electrodes material
US10415122B2 (en) 2015-04-03 2019-09-17 Elysis Limited Partnership Cermet electrode material

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