CN102492850A - Method for recycling iron alloy by smelting red mud - Google Patents
Method for recycling iron alloy by smelting red mud Download PDFInfo
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- CN102492850A CN102492850A CN2011104156848A CN201110415684A CN102492850A CN 102492850 A CN102492850 A CN 102492850A CN 2011104156848 A CN2011104156848 A CN 2011104156848A CN 201110415684 A CN201110415684 A CN 201110415684A CN 102492850 A CN102492850 A CN 102492850A
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- Prior art keywords
- melt
- slag
- red mud
- induction furnace
- burden
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000640 Fe alloy Inorganic materials 0.000 title claims abstract description 16
- 238000003723 Smelting Methods 0.000 title claims abstract description 12
- 238000004064 recycling Methods 0.000 title abstract description 4
- 239000002893 slag Substances 0.000 claims abstract description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- 230000002829 reductive effect Effects 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000004411 aluminium Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 235000021050 feed intake Nutrition 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000048 melt cooling Methods 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000000155 melt Substances 0.000 abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000470 constituent Substances 0.000 abstract 2
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000007499 fusion processing Methods 0.000 description 3
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- 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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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for recycling iron alloy by continuously smelting red mud, which comprises the following processing steps of: firstly, mixing the red mud with reducing agent, slag forming constituent and binding agent sufficiently and then forming spherical burden; then continuously feeding the spherical burden into a burden barrel so as to form a burden column, and continuously feeding a power frequency induction furnace with the burden; next, heating the burden by the power frequency induction furnace so as to form melt, and forming reducing atmosphere in the induction furnace; next, reducing iron in the oxidation state in the burden to be metallic melt; enabling aluminum in the oxidation state to form molten slag with the slag forming constituent still in the oxidation state; next, electromagnetically stirring the melt in the furnace by the power frequency induction furnace, mixing the melt with the molten slag uniformly, and pouring the mixture from a pouring port to a front bed; next, separating the reduced metal iron melt from the molten slag in the front bed; at last, cooling the metal melt, and obtaining iron alloy ingots and slag rich in aluminum oxide. The method disclosed by the invention solves the problem in expansion as the red mud is treated by the smelting method, and simplifies the process.
Description
Technical field
The present invention relates to a kind of smelting process, especially a kind of method that from red mud, reclaims iron alloy through melting.
Background technology
Red mud is also claimed red soil, the contaminative waste residue of discharging when mud is Aluminium industry extraction aluminum oxide, 1 ton of aluminum oxide of the every production of average, 1.0～2.0 tons of red muds of subsidiary generation.China is as the world the 4th big alumina producing state, and the red mud of annual discharging is up to millions of tons.A large amount of red muds can not fully effectively utilize, and can only rely on large-area stockyard to stack, and has taken a large amount of soils, owing to contain a large amount of strong alkaline substances in the red mud, adopts the landfill disposal mode that environment has been caused serious pollution.About 7,000 ten thousand tons of the annual red mud that produces in the whole world, the annual red mud that produces of China is more than 3,000 ten thousand tons.The generation of a large amount of red muds causes many-sided direct and indirect influence to Human's production, life, so reduce the output and the harm of red mud to greatest extent, realization by all kinds of means, the resource utilization of quantity is extremely urgent greatly.Generally contain multiple metal trace elements such as a large amount of iron and titanium in the red mud, therefore still have bigger value capable of using and economic worth.In order from red mud, to reclaim above-mentioned metallic element, can reclaim through methods such as physical separation, metallurgy, chemistry.Physical separation at first need carry out magnetic processing to red mud, and then adopts the magnetic preparator irony separating substances in the red mud to be come out complex process, poor practicability.Existing metallurgical method generally needs slag making; And then slag is pulled out slag through slag-drip opening handle; This method can't be applicable to the smelting of red mud, is that the raw material of red mud and slag can float on bath surface in the process of feeding intake because contained a large amount of slag charges and be Powdered in the red mud raw material; Thereby cause swollen material to form bulge, therefore can't produce.The method that adopts chemistry is to add acid solution, and with the reactive metal oxide formation metallic solution in the red mud, this method process method is complicated, owing to contain other a large amount of mineral in the red mud, therefore also can waste a large amount of reaction solutions.
Summary of the invention
The purpose of this invention is to provide a kind of red mud melting and reclaim the method for iron alloy, adopt the swollen material problem that melting method was caused, simplify technology to solve red mud.
The present invention realizes above-mentioned purpose through following technical scheme:
The method of iron alloy is reclaimed in red mud continuous smelting, comprises following process step:
A. with processing spherical furnace charge behind red mud and reductive agent, slag former, the tackiness agent thorough mixing;
B. spherical furnace charge is added in the barrel body continuously and forms stock column, and feed intake to line frequency induction furnace continuously;
C. line frequency induction furnace adds the thermosetting melt to furnace charge, and in induction furnace, forms reducing atmosphere;
D. the oxidation state iron in the furnace charge is reduced into metal melt; Oxidation state aluminium still forms slag with its oxidation state form and slag former;
E. line frequency induction furnace produces function composite by electromagnetic stirring to melt in the stove, makes melt and slag uniform mixing, is continuously pouring to external crucible from a sprue gate;
F. the metallic iron melt that is reduced is realized separating in external crucible with slag;
G. obtain iron alloy ingot and alumina rich slag after the metal melt cooling.
Wherein, the ferro element in the applying that melting is reclaimed is by weight percentage greater than 80%, and aluminium element is by weight percentage less than 1%.
Wherein, said line frequency induction furnace is the malleation reduction furnace, and the opening for feed of stove is provided with the syllogic feeding unit, also is provided with in the stove to be used to reclaim CO gas collection mouth, and the sprue gate of stove is provided with the liquid level that is lower than melt.
The invention has the beneficial effects as follows: adopt line frequency induction furnace that red mud is carried out melting; Line frequency induction furnace can generate an electromagnetic field in melt in fusion process, stirs thereby make melt self produce intensive, and whole melting need slag making in stove; But metal melt in the red mud and slag are mixed fully; Can promote the reduction reaction of MOX to carry out fully on the one hand, can avoid slag to float on the swollen material problem that the melt top is caused on the other hand, after reduction reaction is fully accomplished, again melt cast is incubated to external crucible; Slag gentlier floats and the metal melt sinking, thereby realizes both separation.Reclaim obtained metal alloy be the lower irony alloy of aluminum content, can have very high economic worth directly as the direct raw material of smelting iron and steel.And this technology simply can realize continuous dosing production, and is highly efficient in productivity and cost recovery is very low, can effectively solve the problem of the recycling of existing red mud.
Embodiment
The method of iron alloy is reclaimed in red mud continuous smelting, comprises following process step:
A. with processing spherical furnace charge behind red mud and reductive agent, slag former, the tackiness agent thorough mixing;
B. spherical furnace charge is added in the barrel body continuously and forms stock column, and feed intake to line frequency induction furnace continuously;
C. line frequency induction furnace adds the thermosetting melt to furnace charge, and in induction furnace, forms reducing atmosphere;
D. the oxidation state iron in the furnace charge is reduced into metal melt; Oxidation state aluminium still forms slag with its oxidation state form and slag former;
E. line frequency induction furnace produces function composite by electromagnetic stirring to melt in the stove, makes melt and slag uniform mixing, is continuously pouring to external crucible from a sprue gate;
F. the metallic iron melt that is reduced is realized separating in external crucible with slag;
G. obtain iron alloy ingot and alumina rich slag after the metal melt cooling.
Adopt line frequency induction furnace that red mud is carried out melting; Line frequency induction furnace can generate an electromagnetic field in melt in fusion process, stirs thereby make melt self produce intensive, and whole melting need slag making in stove; But metal melt in the red mud and slag are mixed fully; Reduction reaction that on the one hand can promotes oxidn attitude iron can be carried out fully, can avoid slag to float on the swollen material problem that the melt top is caused on the other hand, after reduction reaction is fully accomplished, melt cast is incubated to external crucible again; Slag gentlier floats and the metal melt sinking, thereby realizes both separation.Reclaim obtained metal alloy be the lower irony alloy of aluminum content, can have very high economic worth directly as the direct raw material of smelting iron and steel.And this technology simply can realize continuous dosing production, and is highly efficient in productivity and cost recovery is very low, can effectively solve the problem of the recycling of existing red mud.
Adopt ferro element in the metal alloy that above-mentioned technology melting reclaims by weight percentage greater than 80%, aluminium element is by weight percentage less than 1%.This is owing to aluminium element in red mud mainly is to exist with the aluminum oxide form, in fusion process, can not be reduced, so aluminium element only can be enriched in the slag; And in alloy content seldom, just this melting technology can realize the separation of ferro-aluminum element, what obtained is a kind of iron alloy; Except that ferro element; Also have some trace elements like elements such as titanium, lead, copper, nickel, silver, magnesium, silicon, this alloy is the raw material that is well suited for making steel, and has higher economic value.
For the reduction reaction of guaranteeing metal melt can fully be carried out, line frequency induction furnace adopts the malleation reduction furnace, and the opening for feed of stove is provided with the syllogic feeding unit, can prevent effectively that airborne oxygen from entering in the stove.Owing to added excessive reductive agent in the raw material; It generally is coke; Therefore be full of a large amount of carbon monoxide in the stove, to guarantee the reducing atmosphere in the stove, excessive carbon monoxide needs to discharge; Therefore also be provided with in the stove and be used to reclaim CO gas and collect mouthful, the carbon monoxide of collection can be used as combustion gas and uses.The sprue gate of stove is provided with the liquid level that is lower than melt, produces thereby fused mass after reaction meeting successive flows out the cast of realization successive by the sprue gate, can prevent that also air admission is in stove.
Claims (3)
1. the method for iron alloy is reclaimed in red mud continuous smelting, comprises following process step:
A. with processing spherical furnace charge behind red mud and reductive agent, slag former, the tackiness agent thorough mixing;
B. spherical furnace charge is added in the barrel body continuously and forms stock column, and feed intake to line frequency induction furnace continuously;
C. line frequency induction furnace adds the thermosetting melt to furnace charge, and in induction furnace, forms reducing atmosphere;
D. the oxidation state iron in the furnace charge is reduced into metal melt; Oxidation state aluminium still forms slag with its oxidation state form and slag former;
E. line frequency induction furnace produces function composite by electromagnetic stirring to melt in the stove, makes melt and slag uniform mixing, is continuously pouring to external crucible from a sprue gate;
F. the metallic iron melt that is reduced is realized separating in external crucible with slag;
G. obtain iron alloy ingot and alumina rich slag after the metal melt cooling.
2. the method for iron alloy is reclaimed in red mud continuous smelting according to claim 1, it is characterized in that: the ferro element in the iron alloy that melting is reclaimed is by weight percentage greater than 80%, and aluminium element is by weight percentage less than 1%.
3. the method for iron alloy is reclaimed in red mud continuous smelting according to claim 1; It is characterized in that: said line frequency induction furnace is the malleation reduction furnace; The opening for feed of stove is provided with the syllogic feeding unit; Also be provided with in the stove and be used to reclaim CO gas and collect mouthful, the sprue gate of stove is provided with the liquid level that is lower than melt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104156848A CN102492850B (en) | 2011-12-14 | 2011-12-14 | Method for recycling iron alloy by smelting red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104156848A CN102492850B (en) | 2011-12-14 | 2011-12-14 | Method for recycling iron alloy by smelting red mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102492850A true CN102492850A (en) | 2012-06-13 |
| CN102492850B CN102492850B (en) | 2013-08-21 |
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| CN2011104156848A Active CN102492850B (en) | 2011-12-14 | 2011-12-14 | Method for recycling iron alloy by smelting red mud |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117601A (en) * | 1977-03-23 | 1978-10-14 | Sumitomo Metal Ind Ltd | Recovering method for valuable metals in stainless steel slag |
| SU1735408A1 (en) * | 1990-04-10 | 1992-05-23 | Норильский горно-металлургический комбинат им.А.П.Завенягина | Process for treating slags for production of heavy nonferrous metals |
| KR20050109763A (en) * | 2004-05-17 | 2005-11-22 | 주식회사 포스코 | Method for recovery valuable metals from steel-making slag of stainless steel |
| CN1888102A (en) * | 2006-07-14 | 2007-01-03 | 中国铝业股份有限公司 | Direct Al-Si-Fe alloy smelting process in ore smelting furnace |
| CN101429582A (en) * | 2008-12-04 | 2009-05-13 | 武汉科技大学 | Method for producing ferro-silicon alloy and calcium aluminate material with red mud and aluminum ash |
-
2011
- 2011-12-14 CN CN2011104156848A patent/CN102492850B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117601A (en) * | 1977-03-23 | 1978-10-14 | Sumitomo Metal Ind Ltd | Recovering method for valuable metals in stainless steel slag |
| SU1735408A1 (en) * | 1990-04-10 | 1992-05-23 | Норильский горно-металлургический комбинат им.А.П.Завенягина | Process for treating slags for production of heavy nonferrous metals |
| KR20050109763A (en) * | 2004-05-17 | 2005-11-22 | 주식회사 포스코 | Method for recovery valuable metals from steel-making slag of stainless steel |
| CN1888102A (en) * | 2006-07-14 | 2007-01-03 | 中国铝业股份有限公司 | Direct Al-Si-Fe alloy smelting process in ore smelting furnace |
| CN101429582A (en) * | 2008-12-04 | 2009-05-13 | 武汉科技大学 | Method for producing ferro-silicon alloy and calcium aluminate material with red mud and aluminum ash |
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| CN102492850B (en) | 2013-08-21 |
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