CN103866128B - Carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium - Google Patents
Carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium Download PDFInfo
- Publication number
- CN103866128B CN103866128B CN201410084910.2A CN201410084910A CN103866128B CN 103866128 B CN103866128 B CN 103866128B CN 201410084910 A CN201410084910 A CN 201410084910A CN 103866128 B CN103866128 B CN 103866128B
- Authority
- CN
- China
- Prior art keywords
- red mud
- ferroaluminium
- dealkalize
- aluminium
- melting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention is the method for a kind of carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium, belongs to technical field of iron alloy.The present invention's red mud by a certain percentage, iron ore are raw material, melting in electric furnace, striking is heated to molten metal liquid, add appropriate reductive agent carbon, needing if desired to add certain aluminium ingot, efficiently obtain ferroaluminium, does is its institute's alloy composition that obtains (quality %): C? 1 ~ 5%, Al? 35 ~ 60%, Fe? 35 ~ 60%.An original creation point of this production technique is exactly by adding appropriate iron ore, reduces the Gibbs free energy of aluminium reducing, thus realizes the method for ore direct production ferroaluminium.
Description
Technical field
The invention belongs to ferroalloy smelting technical field, is the method for a kind of carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium.
Background technology
The contaminative waste residue of discharging when red mud is Aluminium industry extraction aluminum oxide, average often produces 1 ton of aluminum oxide, incidentally produces 1 ~ 2 ton of red mud, and its mineralogical composition is complicated.The red mud that the whole world produces every year about 7,000 ten thousand tons, the red mud that China produces every year is more than 3,000 ten thousand tons.A large amount of red muds can not fully effectively utilize, and large-area stockyard can only be relied on to stack, occupy a large amount of soil, also cause serious pollution to environment.The production of the mankind, life are caused directly many-sided and indirectly affected, so reduce output and the harm of red mud to greatest extent, realizes by all kinds of means, the resource utilization of large quantity is extremely urgent.
Recently, the comprehensive utilization of red mud has caused attention both domestic and external and concern, about the comprehensive utilization of red mud is reported: use the metal etc. that red mud does paving cement, plastic filler, soil improvement agent, roadbed material and reclaims wherein, but great majority research is all because utilization is few, efficiency is not high or Financial cost is high and be difficult to operation industrialization.And be all directly adopt aluminium ingot and iron smelting aluminum iron alloy owing to producing now ferroaluminium, its cost is higher.
Summary of the invention
The object of this invention is to provide a kind of method of novel employing carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium.The method can process bulk deposition red mud, makes full use of solid waste, environmental protect; Simple to operate, the relatively existing technology of production cost is lower.
The object of the present invention is achieved like this: directly smelt production ferroaluminium with electric furnace.According to the reduction characteristic of aluminium, the avidity of oxygen and aluminium, by Gibbs Free energy equation Shi Ke get:
Calculate the reduction reaction equilibrium temperature T=2342K of aluminum oxide, and the reduction reaction equilibrium temperature T=911K of ferric oxide.The reduction temperature of aluminium is far above the reduction temperature of iron.At a lower temperature, reactive aluminum is difficult to carry out, and needs other means auxiliary to reduce temperature of reaction.After above-mentioned two reduction reactions are coupled by a certain percentage, obviously can reduce the reduction temperature of aluminum oxide, for carbothermy reduction bauxite and iron ore direct production High-carbon aluminum-iron alloy provide a theoretical foundation.
A characteristic part of the present invention is to utilize in the smelting process of carbothermy reduction red mud direct production ferroaluminium and adds the reduction reaction that iron ore promotes aluminium, reduces energy consumption, reduce costs than existing red mud comprehensive utilization technique.
The basic step of carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium of the present invention is as follows: the quality composition % of described ferroaluminium is: C1 ~ 5%, Al35 ~ 65%, Fe30 ~ 60%, P≤0.1%, S≤0.04%
(1) adopt the mode of lime dealkalize to carry out dealkalize pre-treatment to aluminium metallurgy red mud, and adopt K, Na ion of flame photometer to stripping to detect, make Na concentration of element in solution after being less than 25mg/ml, namely obtain qualified dealkalize red mud;
(2) dealkalize red mud adopts Leaching by strong acid curing to obtain aluminum oxide, ensures that the quality of alumina of stripping is not less than 90% of aluminum oxide total mass in red mud;
(3) calculate the proportioning material quantity of aluminum oxide, iron ore in desired product ferroaluminium, and take for subsequent use;
(4) material quantity taken loads electrosmelting, and striking heating raw, to molten metal bath;
(5) taking appropriate reduction carbon joins in molten metal bath, remains in 1450 ~ 1700 DEG C of temperature ranges, melting 2 ~ 4h;
(6) if when the need of production of this ferroaluminium adds part aluminium ingot, then after melting, take aluminium ingot add in melting pond, continue melting 1 ~ 1.5h; Otherwise, directly enter step (7);
(7) detect P, S up to standard after, cast molding, obtains qualified ferroaluminium ingot.
Advantage of the present invention be following some:
(1) adopt carbothermy reduction red mud direct production ferroaluminium, than directly taking aluminium ingot and iron to produce ferroaluminium technique at present, reducing production cost, and ensureing high-quality ferroaluminium performance requriements;
(2) add iron ore in smelting ferroaluminium process, promote the carrying out of aluminium reducing reaction, this technology is also an innovative point of the present invention in existing technique.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation:
Embodiment 1(feeds intake red mud 300kg, iron ore 30kg, aluminium ingot 93kg, reductive agent carbon 60kg, lime 30kg, and always feed intake 513kg)
Reductive agent carbon main component: C80%(mass percent)
300kg red mud is in small, broken bits, load in a stripping pond, add 30kg lime and 900L clear water, stir and maintain the temperature in 90 DEG C, after about 6h, supernatant liquor is poured in wastewater disposal basin, after throw out repeated washing 5 times, use flame photometer to carry out Na detection to solution, rear filtering-depositing up to standard, this is precipitated as dealkalize red mud.Dealkalize red mud is put into Ore Leaching molten bath, passes into CO
2, leach aluminum oxide, ensure that leaching rate of alumina is to 90%.Leaching aluminum oxide is dried and 30kg iron ore is encased in electric furnace, striking is heated to fused solution, taking 60kg reductive agent carbon adds in fused solution, control fused solution temperature at 1500 DEG C, after melting 3h, then add 93kg aluminium ingot, continue melting 1h, detect P, S up to standard, cast molding, can obtain ferroaluminium.The main component of this alloy is C2%, Al58%, Fe40%.
Embodiment 2(feeds intake red mud 100kg, iron ore 40kg, aluminium ingot 0kg, reductive agent carbon 19kg, lime 10kg, and always feed intake 169kg)
Reductive agent carbon main component: C80%(mass percent)
100kg red mud is in small, broken bits, load in a stripping pond, add 10kg lime and 300L clear water, stir and maintain the temperature in 90 DEG C, after about 6h, supernatant liquor is poured in wastewater disposal basin, after throw out repeated washing 5 times, use flame photometer to carry out Na detection to solution, rear filtering-depositing up to standard, this is precipitated as dealkalize red mud.Dealkalize red mud is put into Ore Leaching molten bath, passes into CO
2, leach aluminum oxide, ensure that leaching rate of alumina is to 90%.Leaching aluminum oxide is dried and 40kg iron ore is encased in electric furnace, and striking is heated to fused solution, takes 19kg reductive agent carbon and adds in fused solution, controls fused solution temperature at 1650 DEG C, and after melting 3h, detect P, S up to standard, cast molding, can obtain ferroaluminium.The main component of this alloy is C1%, Al45%, Fe54%.
Embodiment 3(feeds intake red mud 120kg, iron ore 20kg, aluminium ingot 8kg, reductive agent carbon 26kg, lime 12kg, and always feed intake 186kg)
Reductive agent carbon main component: C80%(mass percent)
120kg red mud is in small, broken bits, load in a stripping pond, add 12kg lime and 360L clear water, stir and maintain the temperature in 90 DEG C, after about 6h, supernatant liquor is poured in wastewater disposal basin, after throw out repeated washing 5 times, use flame photometer to carry out Na detection to solution, rear filtering-depositing up to standard, this is precipitated as dealkalize red mud.Dealkalize red mud is put into Ore Leaching molten bath, passes into CO
2, leach aluminum oxide, ensure that leaching rate of alumina is to 90%.Leaching aluminum oxide is dried and 20kg iron ore is encased in electric furnace, striking is heated to fused solution, taking 26kg reductive agent carbon adds in fused solution, control fused solution temperature at 1625 DEG C, after melting 3h, then add 8kg aluminium ingot, continue melting 1h, detect P, S up to standard, cast molding, can obtain ferroaluminium.The main component of this alloy is C4%, Al38%, Fe58%.
Claims (6)
1. a method for carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium, is characterized in that the quality group of described ferroaluminium becomes: C1 ~ 5%, Al35 ~ 65%, Fe30 ~ 60%, P≤0.1%, S≤0.04%
The basic step of carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium is as follows:
(1) mode of lime dealkalize is adopted to carry out dealkalize pre-treatment to aluminium metallurgy red mud, and adopt K, Na ion of flame photometer to stripping to detect, Na concentration of element in solution is made after being less than 25mg/ml, namely to obtain qualified dealkalize red mud, in dealkalize solution, Na is less than 25mg/ml, just stop the washing of red mud, filter;
(2) dealkalize red mud adopts concentrated acid immersion to go out to obtain aluminum oxide, ensures that the quality of alumina of stripping is not less than 90% of aluminum oxide total mass in red mud;
(3) calculate the proportioning material quantity of aluminum oxide, iron ore in desired product ferroaluminium, and take for subsequent use;
(4) material quantity taken loads electrosmelting, and striking heating raw, to molten metal bath;
(5) taking appropriate reduction carbon joins in molten metal bath, remains in 1450 ~ 1700 DEG C of temperature ranges, melting 2 ~ 4h;
(6) if when this ferroaluminium need of production adds part aluminium ingot, then after melting, take aluminium ingot add in melting pond, continue melting 1 ~ 1.5h; Otherwise, directly enter step (7);
(7) detect P, S up to standard after, cast molding, obtains qualified ferroaluminium ingot.
2. the method for claim 1, is characterized in that: aluminium metallurgy red mud is before carrying out dealkalize, and red mud is in small, broken bits, and particle diameter accounts for overall more than 90% at the red mud of 2 ~ 4cm.
3. the method for claim 1, is characterized in that: control lime in red mud dealkalization treating processes and account for red mud quality 12%, and temperature controls at 90 ~ 100 DEG C, treatment time 5 ~ 7h.
4. the method for claim 1, is characterized in that: in order to ensure the carrying out of reduction reaction, must add the iron ore of certain content, and described iron ore accounts for 6 ~ 30% of reduction reaction desired raw material amount total mass.
5. the method for claim 1, is characterized in that: detect molten metal bath P≤0.1%, carry out shaping casting after S≤0.04%.
6. the method according to any one of claim 1-5, is characterized in that: pouring temperature controls at 1150 ~ 1200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410084910.2A CN103866128B (en) | 2014-03-10 | 2014-03-10 | Carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410084910.2A CN103866128B (en) | 2014-03-10 | 2014-03-10 | Carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103866128A CN103866128A (en) | 2014-06-18 |
| CN103866128B true CN103866128B (en) | 2016-01-20 |
Family
ID=50905125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410084910.2A Expired - Fee Related CN103866128B (en) | 2014-03-10 | 2014-03-10 | Carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103866128B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331799A (en) * | 2015-10-20 | 2016-02-17 | 山东建筑大学 | Integrated calcination method for dealkalization and magnetization of Bayer process red mud |
| CN107083485B (en) * | 2017-04-28 | 2018-09-07 | 东北大学 | A kind of method of comprehensive utilization of alumina laterite |
| CN107365933A (en) * | 2017-06-27 | 2017-11-21 | 太仓市雅兴精密冲压件厂 | A kind of shock proof die casting of high abrasion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066687A (en) * | 1991-05-13 | 1992-12-02 | 包头市联营合金冶炼厂 | With the direct smelting Si-Al-Fe alloy of ore |
| CN101456573A (en) * | 2008-12-29 | 2009-06-17 | 中国铝业股份有限公司 | Method for processing red mud from Bayer process |
| CN102994757A (en) * | 2012-11-27 | 2013-03-27 | 淄博旭德环境工程技术有限公司 | Method for preparing ferro-silico-aluminum alloy by using Bayer process red mud |
-
2014
- 2014-03-10 CN CN201410084910.2A patent/CN103866128B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066687A (en) * | 1991-05-13 | 1992-12-02 | 包头市联营合金冶炼厂 | With the direct smelting Si-Al-Fe alloy of ore |
| CN101456573A (en) * | 2008-12-29 | 2009-06-17 | 中国铝业股份有限公司 | Method for processing red mud from Bayer process |
| CN102994757A (en) * | 2012-11-27 | 2013-03-27 | 淄博旭德环境工程技术有限公司 | Method for preparing ferro-silico-aluminum alloy by using Bayer process red mud |
Non-Patent Citations (2)
| Title |
|---|
| 国外氧化铝赤泥脱钠的进展;梅贤功等;《轻金属》;19920731;第21-24页 * |
| 碳热还原法生产铝铁合金;杨跃先;《轻金属》;19880131;第62页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103866128A (en) | 2014-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2005304190B2 (en) | A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace | |
| AU2005299184B2 (en) | A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace | |
| CN105256152A (en) | Method for quick reduction smelting of titaniferous furnace slag | |
| CN1730684A (en) | Bessemer matte production method using nickel sulfide materials | |
| CN101638704A (en) | Method for extracting iron from copper smelting waste residue | |
| CN105087842B (en) | A kind of method of high-iron bauxite production molten iron and aluminum oxide | |
| CN104726715A (en) | Recycling method for vanadium-chromium waste residues | |
| CN103866128B (en) | Carbothermy reduction aluminium metallurgy red mud direct production ferroaluminium | |
| Jiao et al. | Recovery of chromium and magnesium from spent magnesia-chrome refractories by acid leaching combined with alkali precipitation and evaporation | |
| CN107868872A (en) | The method that vanadium chromium reducing slag two step method reduction melting prepares vanadium ferrochrome | |
| CN102337408A (en) | Two-step reduction method for recycling stainless steel scales | |
| CN105237013A (en) | Anti-sticking slag gunning material for hot-metal bottle | |
| CN102994757A (en) | Method for preparing ferro-silico-aluminum alloy by using Bayer process red mud | |
| CN100487141C (en) | Technique for extracting titanium slag form red mud | |
| CN104630566B (en) | Ferro-nickel alloy and preparation method thereof | |
| CN103468856A (en) | Method for steel molybdenum alloying | |
| CN105018736B (en) | Magnesium, aluminium, chromium, the method for iron synthetical recovery in a kind of carbon ferrochrome metallurgical slag | |
| CN101476047B (en) | Method for preparing metal aluminum from aluminum-containing raw material | |
| CN106544456A (en) | A kind of method that iron produces coverter pig cold pressing block in utilization blast furnace granulated slag | |
| CN106319209B (en) | A kind of rotary hearth furnace processing lead cadmia iron-extracting process | |
| CN104711428A (en) | Method for preparing and recovering noble metal in pickling sludge | |
| CN106636680B (en) | Large-scale accumulation carbonization method for extracting vanadium from high-silica coal | |
| CN108796236A (en) | A kind of method of valuable constituent element comprehensive reutilization in copper ashes | |
| CN114058762A (en) | Method for smelting vanadium-containing steel slag by treating zinc-containing fly ash in blast furnace | |
| CN206985741U (en) | A kind of device that PAFC is prepared using hot metallurgical slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |