CN109609778A - A method of primary aluminum, which is carried out, using metal extraction removes gallium - Google Patents
A method of primary aluminum, which is carried out, using metal extraction removes gallium Download PDFInfo
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- CN109609778A CN109609778A CN201910122195.XA CN201910122195A CN109609778A CN 109609778 A CN109609778 A CN 109609778A CN 201910122195 A CN201910122195 A CN 201910122195A CN 109609778 A CN109609778 A CN 109609778A
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- aluminium
- gallium
- lead
- primary aluminum
- solidification
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0084—Obtaining aluminium melting and handling molten aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Manufacture And Refinement Of Metals (AREA)
Abstract
A method of primary aluminum is carried out using metal extraction and removes gallium, comprising the following steps: (1) primary aluminum and metallic lead is put into graphite crucible；(2) crucible is placed in heating furnace, is passed through nitrogen and drives away air；Being warming up to 700~900 DEG C melts primary aluminum and metallic lead all, forms blend melt；(3) stirring makes liquid aluminium and liquid lead is top-down mixes step by step；(4) it is stood after stirring 10~60min, furnace cooling；The aluminium on upper layer is initially formed solidification aluminium layer；Solidification aluminium layer is formed and in the case that lead do not solidify, solidification aluminium layer is taken out；(5) purification aluminium is formed after the aluminium layer solidified is cooled to room temperature.Method of the invention has simple process, time-consuming short, easy to operate, except the good advantage of gallium effect.
Description
Technical field
It is the invention belongs to metallurgical technology field, in particular to a kind of that the method that primary aluminum removes gallium is carried out using metal extraction.
Background technique
The primary aluminum produced from electrolytic cell casts aluminium ingot after purification, clarification and slagging-off, and purity generally exists
Between 99.5%~99.8%, wherein the major impurity contained includes iron, silicon, copper, vanadium, gallium, calcium and a small amount of nonmetallic inclusion
Deng.
Impurity gallium is brought by raw alumina；Gallium is often entered in aluminum-containing mineral in the form of isomorphous replacement,
Close symbiosis in bauxite；Gallium is mainly subjected to enrichment point in the seed precipitation solution of alumina producing in existing production technology
From avoiding gallium from entering in alumina product；Gallium has very high solid solubility in aluminium, reaches as high as 20%；Chemically due to gallium
Matter is similar with aluminium, is then difficult to remove it in aluminium when gallium enters as impurity；Impurity gallium, which enters in electrolytic cell, has electrolytic aluminium
Negative effect, on the one hand reduces the current efficiency of electrolytic process, and still further aspect reduces the purity of primary aluminum, adds for subsequent aluminium
Work and had an adverse effect using quality；Micro gallium can reduce the corrosion resistance of aluminium, improve aluminium to the sensibility of chloride ion, also
The electric conductivity of aluminium can be reduced.
Since gallium is similar in chemical property with aluminium, general aluminium purification method such as chloridising, oxidizing process, the precipitation method, flux
Method of purification etc. is all difficult to remove impurity gallium in aluminium；And the cost of the methods of electrorefining, segregation melting is relatively high, it is difficult to real
Existing large-scale industrial application；For the impurity-removing method of the gallium in primary aluminum, there are no document reports at present.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of gallium in extraction primary aluminum, at high temperature using lead, aluminium plus gallium three
The sequencing of dissolve each other relationship and the cooling solidification of liquid phase while simplifying operation, is reduced by lead extraction and separation gallium
The content of gallium in aluminium.
The method of the present invention includes the following steps:
1, primary aluminum and metallic lead are put into graphite crucible；The mass ratio of primary aluminum and metallic lead is 1:(5~10)；
2, crucible is placed in heating furnace, nitrogen is passed through into heating furnace and drives away air；Heating furnace is warming up to 700~
900 DEG C melt primary aluminum and metallic lead all, form blend melt；
3, blend melt is stirred under heat-retaining condition, makes liquid aluminium and liquid lead is top-down mixes step by step,
Gallium is evenly distributed in aluminium and lead；
4, it is stood after stirring 10~60min, and stops keeping the temperature, make blend melt furnace cooling；In standing and cooling procedure
In, lead and aluminium are gradually layered, and the aluminium on upper layer first occurs solidification and forms solidification aluminium layer；When the formation of solidification aluminium layer, lead does not coagulate
In the case where Gu, solidification aluminium layer is taken out, part gallium is extracted into the liquid lead of lower layer；
5, purification aluminium is formed after the aluminium layer solidified is cooled to room temperature.
The content of gallium is less than 50ppm in above-mentioned purification aluminium.
The content of gallium is in 200~500ppm in above-mentioned primary aluminum.
The principle of the present invention is: since aluminium element and lead element cannot dissolve each other, and the two density variation is larger, from liquid
It can be gradually layered during being cooled down to solid, lead can be in lower layer, and aluminium is on upper layer；Due to freezing point difference, in cooling procedure on
Layer aluminium first solidifies, and solidifies after lower layer's lead；During lead cooled and solidified, gallium can be due to reducing gradually in solubility wherein
It is precipitated；Therefore it needs to take out aluminium layer before lead is cooling, gallium content in aluminium is made to be down to 50ppm or less.
Method of the invention has simple process, time-consuming short, easy to operate, except the good advantage of gallium effect.
Specific embodiment
The mass content of aluminium is 99.75% in the primary aluminum used in the embodiment of the present invention, and the content of gallium is 200~
500ppm。
The purity 99.5% of the metallic lead used in the embodiment of the present invention.
The test method of gallium content is inductively coupled plasma mass spectrometry (ICP-MS) in the embodiment of the present invention.
Embodiment 1
The content of gallium is in 233ppm in the primary aluminum of use；Primary aluminum and metallic lead are put into graphite crucible；Primary aluminum and metal
The mass ratio of lead is 1:10；
Crucible is placed in heating furnace, nitrogen is passed through into heating furnace and drives away air；Heating furnace, which is warming up to 700 DEG C, to be made
Primary aluminum and metallic lead all melt, and form blend melt；
Blend melt is stirred under heat-retaining condition, makes liquid aluminium and liquid lead is top-down mixes step by step, gallium
It is evenly distributed in aluminium and lead；
It is stood after stirring 60min, and stops keeping the temperature, make blend melt furnace cooling；Stand and cooling procedure in, lead and
Aluminium is gradually layered, and the aluminium on upper layer first occurs solidification and forms solidification aluminium layer；When solidification aluminium layer is formed and feelings that lead does not solidify
Under condition, solidification aluminium layer is taken out, part gallium element is extracted into the liquid lead of lower layer；
The aluminium layer of solidification forms purification aluminium after being cooled to room temperature, purify the content 41ppm of gallium in aluminium.
Embodiment 2
With embodiment 1, difference is method:
(1) use primary aluminum in gallium content in 361ppm；The mass ratio of primary aluminum and metallic lead is 1:8；
(2) heating furnace is warming up to 800 DEG C；
(3) it is stood after stirring 30, min；
(4) the content 26ppm of gallium in aluminium is purified.
Embodiment 3
With embodiment 1, difference is method:
(1) use primary aluminum in gallium content in 483ppm；The mass ratio of primary aluminum and metallic lead is 1:5；
(2) heating furnace is warming up to 900 DEG C；
(3) it is stood after stirring 10min；
(4) the content 39ppm of gallium in aluminium is purified.
Claims (3)
1. a kind of carry out the method that primary aluminum removes gallium using metal extraction, it is characterised in that the following steps are included:
(1) primary aluminum and metallic lead are put into graphite crucible；The mass ratio of primary aluminum and metallic lead is 1:(5~10)；
(2) crucible is placed in heating furnace, nitrogen is passed through into heating furnace and drives away air；Heating furnace is warming up to 700~900
It melts primary aluminum and metallic lead all, forms blend melt；
(3) blend melt is stirred under heat-retaining condition, makes liquid aluminium and liquid lead is top-down mixes step by step, gallium is equal
It is even to be distributed in aluminium and lead；
(4) it is stood after stirring 10~60min, and stops keeping the temperature, make blend melt furnace cooling；In standing and cooling procedure,
Lead and aluminium are gradually layered, and the aluminium on upper layer first occurs solidification and forms solidification aluminium layer；When the formation of solidification aluminium layer, lead does not solidify
In the case where, solidification aluminium layer is taken out, part gallium is extracted into the liquid lead of lower layer；
(5) purification aluminium is formed after the aluminium layer solidified is cooled to room temperature.
2. a kind of method for removing gallium using metal extraction progress primary aluminum according to claim 1, it is characterised in that described
The content for purifying gallium in aluminium is less than 50ppm.
3. a kind of method for removing gallium using metal extraction progress primary aluminum according to claim 1, it is characterised in that described
The content of gallium is in 200~500ppm in primary aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910122195.XA CN109609778B (en) | 2019-02-19 | 2019-02-19 | Method for removing gallium from primary aluminum by utilizing metal extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910122195.XA CN109609778B (en) | 2019-02-19 | 2019-02-19 | Method for removing gallium from primary aluminum by utilizing metal extraction |
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| CN109609778A true CN109609778A (en) | 2019-04-12 |
| CN109609778B CN109609778B (en) | 2020-10-09 |
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Citations (6)
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|---|---|---|---|---|
| CN1760389A (en) * | 2005-09-26 | 2006-04-19 | 吕杏根 | Method for regenerating 6063 aluminum alloy by melting and purifying worn-out 6063 material |
| CN102464320A (en) * | 2010-11-18 | 2012-05-23 | 赵钧永 | Metallurgical chemical refining method of silicon |
| CN102464319A (en) * | 2010-11-18 | 2012-05-23 | 赵钧永 | Metallurgical chemical purification method of silicon |
| CN103898338A (en) * | 2012-12-26 | 2014-07-02 | 东莞市长安东阳光铝业研发有限公司 | Method and apparatus for separation and purification of high-purity aluminum |
| CN105018733A (en) * | 2015-07-09 | 2015-11-04 | 中国科学院金属研究所 | Method for enriching and separating bismuth elements in polymetallic mixed resource of waste printed circuit boards |
| CN105039710A (en) * | 2015-07-09 | 2015-11-11 | 中国科学院金属研究所 | Enrichment and separation method of cadmium in waste circuit board multi-metal hybrid resources |
-
2019
- 2019-02-19 CN CN201910122195.XA patent/CN109609778B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760389A (en) * | 2005-09-26 | 2006-04-19 | 吕杏根 | Method for regenerating 6063 aluminum alloy by melting and purifying worn-out 6063 material |
| CN102464320A (en) * | 2010-11-18 | 2012-05-23 | 赵钧永 | Metallurgical chemical refining method of silicon |
| CN102464319A (en) * | 2010-11-18 | 2012-05-23 | 赵钧永 | Metallurgical chemical purification method of silicon |
| CN103898338A (en) * | 2012-12-26 | 2014-07-02 | 东莞市长安东阳光铝业研发有限公司 | Method and apparatus for separation and purification of high-purity aluminum |
| CN105018733A (en) * | 2015-07-09 | 2015-11-04 | 中国科学院金属研究所 | Method for enriching and separating bismuth elements in polymetallic mixed resource of waste printed circuit boards |
| CN105039710A (en) * | 2015-07-09 | 2015-11-11 | 中国科学院金属研究所 | Enrichment and separation method of cadmium in waste circuit board multi-metal hybrid resources |
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| CN109609778B (en) | 2020-10-09 |
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