CN104291539B - One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize - Google Patents
One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize Download PDFInfo
- Publication number
- CN104291539B CN104291539B CN201310295802.5A CN201310295802A CN104291539B CN 104291539 B CN104291539 B CN 104291539B CN 201310295802 A CN201310295802 A CN 201310295802A CN 104291539 B CN104291539 B CN 104291539B
- Authority
- CN
- China
- Prior art keywords
- red mud
- bayer process
- process red
- solidliquid mixture
- dealkalize
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
Abstract
The invention discloses one and utilize CO2With the method for spent acid Combined Treatment Bayer process red mud dealkalize, this process method step is: is pulverized by Bayer process red mud, mixes with water, and Bayer process red mud and water weight ratio example are 1: 3～10；After grinding, red mud granularity is at 160～200 mesh, forms solidliquid mixture, is passed through CO in Bayer process red mud2Carry out acidification reaction；It is passed through CO2Flow is 0.2～1L/min, and reaction temperature is 60 DEG C～80 DEG C, and the time is 0.5～2h；In the solidliquid mixture that the first step obtains, adding the waste hydrochloric acid that mass concentration is 20% and react, Bayer process red mud is 2～4: 1 with the waste hydrochloric acid mass ratio of interpolation, and reaction temperature is 60 DEG C～80 DEG C, and the time is 0.5～2h, obtains solidliquid mixture；The solidliquid mixture sucking filtration obtained is separated, the residue after separating treatment, be used for reclaiming aluminum, ferrum.The method processes Bayer process red mud, provides solution route for the application of red mud building materials aspect.
Description
Technical field
The present invention relates to the processing method of a kind of Bayer process red mud dealkalize, belong to technical field of resource comprehensive utilization.
Background technology
China is the big producing country of aluminium oxide, and Bayer process red mud is that alumina producing is according to the garbage in bayer process route production process.Often produce 1 ton of aluminium oxide by-product 1.0～1.4 tons of red muds.China's aluminium oxide yield is about 30,000,000 tons of red muds at present.
The red mud comprehensive utilization ratio of China is relatively low at present.Along with China's aluminium oxide yield increases and being gradually lowered of bauxite grade year by year, the volume of cargo in storage of red mud also will be continuously increased.Red mud comprehensive utilization still belongs to global problem, and red mud mainly uses disposal options in the world that store up earthing.At present, red mud is mostly carried stockyard by domestic and international alumina producer, and wet method of building a dam is stored up, and this method easily makes a large amount of spent lye penetrate into neighbouring farmland, causes alkalization of soils, bogginess, polluted surface underground water source；Another kind of conventional method is dry method after red mud drying dehydration and evaporation to be stored up, although this decreases volume of cargo in storage, but processing cost increases, and still needs to land occupation, simultaneously some local rainfall is plentiful, also easily cause soil alkalization and the pollution of water system.
Numerous studies are carried out both at home and abroad according to the performance characteristics of red mud different aspect.Red mud is utilized to produce construction material, such as cement, concrete, novel wall material, fired brick, non-burning brick, environment-friendly type wall brick；Red mud is utilized to produce devitrified glass, plastic filler, impervious material, paveio(u)r, valuable metal is reclaimed from red mud, such as Fe, Al, Ti, red mud application in environmental project, as red mud does siliceous fertilizer, improvement soil, administers containing waste water such as Cd, As, Cr, Cu, Pb, Zn, F, P, COD, ammonia nitrogens.
Especially, as producing building materials aspect, because red mud alkali content is higher, there will be " scum " phenomenon for a long time, red mud is utilized and adversely affects.Red mud need to do dealkalize process, make alkali content be reduced to certain scope.
Patent No. US4668485, invention entitled Recovery of sodium aluminate from Bayer process red mud utilizes SO2Processing red mud dealkalization, after dealkalize, the desiliconization of red mud precipitation, rear quaternization, sintering, obtain CaO, SO2, CaO is used for circulating quaternization, SO2Circular treatment dealkalize.This invention processes red mud dealkalization, and red mud alkali content can be reduced to less than 1%, but complex process, pilot process needs sintering, high-temperature service.
Publication number CN101423318A, the method for a kind of red mud dealkalization of denomination of invention, it is divided into dilute sulfuric acid dealkalize stage and pressure oxidation calcium dealkalize stage.Adding reaction dealkalize with a certain amount of acid red mud liquid-solid ratio, dealkalize red mud is 95-150 DEG C in condition of high voltage, temperature, response time 0.5h.Publication number CN1141264A, invention entitled sinter method for red mud dealkalization and processing technology for surface modification thereof, invention describes one in atmospheric conditions, utilize active calcium oxide that red mud is carried out dealkalize, after dealkalize, red mud alkali content is reduced to less than 1%, and above dealkalize needs the long period, and dealkalize cost is high.
Publication number CN101469966A, entitled a kind of normal atmosphere dealkalizing method by sintering, utilize suspension and carbonation dealkalization method to process red mud dealkalization, Na in red mud2The content of O drops to less than 1%.According to pertinent literature, red mud is to CO2Absorbance relatively low, the method, to high-alkali red mud dealkalization, takes time longer.
The present invention overcomes the imperfection of prior art, and technical problem to be solved provides a kind of method processing red mud dealkalization that raw material easily obtains, production cost is low.The present invention utilizes CO2With spent acid Combined Treatment red mud dealkalization, utilize red mud water soluble alkali at waste hydrochloric acid, meanwhile, change red mud wherein crystalline texture, it is simple under walk CO2Process red mud dealkalization.Utilize CO2Processing red mud dealkalization further, reach dealkalize effect, dealkalize efficiency is more than 80%.
Summary of the invention
The problem that the present invention solves is to provide one and utilizes CO2Method with acid Combined Treatment red mud dealkalization.
The invention provides a kind of method utilizing flue gas and spent acid Combined Treatment Bayer process red mud dealkalize, the method includes step in detailed below:
The first step, pulverizes red mud, and after grinding, red mud granularity is at 160～200 mesh, mixes with water, and Bayer process red mud and water weight ratio example are 1:3～10；CO it is passed through in Bayer process red mud2Carry out acidification reaction and obtain solidliquid mixture (1)；It is passed through CO2Flow is 0.2～1L/min, and reaction temperature is 60 DEG C～80 DEG C, and the time is 0.5～2h；
Second step, the solidliquid mixture (1) obtained to first step acidification reaction, add the waste hydrochloric acid that mass concentration is 20% to react, Bayer process red mud is 2～4:1 with the waste hydrochloric acid mass ratio of interpolation, reaction temperature is 60 DEG C～80 DEG C, time is 0.5～2h, obtains solidliquid mixture (2)；
3rd step, solidliquid mixture (2) sucking filtration that second step obtains after processing separates, and the residue after separating treatment is used for reclaiming aluminum, ferrum.
The present invention compared with prior art has the advantages that.
Red mud is the garbage of aluminum oxide industry, very big to environmental hazard, containing recyclable elements such as substantial amounts of Fe and Al in red mud.Simultaneously, it is considered to containing CO in flue gas2Sour gas, is used for processing red mud, can reach the effect processing Bayer process red mud dealkalize.Therefore, CO is utilized2With spent acid Combined Treatment Bayer process red mud dealkalize, not only utilize application prospect in red mud dealkalization process and off-gas recovery, and there is the biggest potential age deduction.
Detailed description of the invention:
Following instance, for further illustrating the present invention, is not limiting as present disclosure.
Example one:
The first step, pulverizes red mud, and after grinding, red mud granularity is at 160 mesh, mixes with water, and Bayer process red mud and water weight ratio example are 1:10；CO it is passed through in Bayer process red mud2Carry out acidification reaction and obtain solidliquid mixture (1)；It is passed through CO2Flow is 1L/min, and reaction temperature is 80 DEG C, and the time is 0.5h；Second step, the solidliquid mixture (1) obtained to first step acidification reaction, add the waste hydrochloric acid that mass concentration is 20% and react, Bayer process red mud is 4:1 with the waste hydrochloric acid mass ratio of interpolation, reaction temperature is 80 DEG C, and the time is 2h, obtains solidliquid mixture (2)；3rd step, solidliquid mixture (2) sucking filtration that second step obtains after processing separates, and the residue after separating treatment is used for reclaiming aluminum, ferrum.Detecting alkali content in low alkali red mud by conventional method, analyzing alkali content in low alkali red mud is 1.8%.
Example two:
The first step, pulverizes red mud, and after grinding, red mud granularity is at 160 mesh, mixes with water, and Bayer process red mud and water weight ratio example are 1:9；CO it is passed through in Bayer process red mud2Carry out acidification reaction and obtain solidliquid mixture (1)；It is passed through CO2Flow is 1L/min, and reaction temperature is 60 DEG C, and the time is 1h；Second step, the solidliquid mixture (1) obtained to first step acidification reaction, add the waste hydrochloric acid that mass concentration is 20% and react, Bayer process red mud is 3:1 with the waste hydrochloric acid mass ratio of interpolation, reaction temperature is 60 DEG C, and the time is 1h, obtains solidliquid mixture (2)；3rd step, solidliquid mixture (2) sucking filtration that second step obtains after processing separates, and the residue after separating treatment is used for reclaiming aluminum, ferrum.Detecting alkali content in low alkali red mud by conventional method, analyzing alkali content in low alkali red mud is 2.1%.
Example three；
The first step, pulverizes red mud, and after grinding, red mud granularity is at 180 mesh, mixes with water, and Bayer process red mud and water weight ratio example are 1:8；CO it is passed through in Bayer process red mud2Carry out acidification reaction and obtain solidliquid mixture (1)；It is passed through CO2Flow is 0.8L/min, and reaction temperature is 70 DEG C, and the time is 1.5h；Second step, the solidliquid mixture (1) obtained to first step acidification reaction, add the waste hydrochloric acid that mass concentration is 20% and react, Bayer process red mud is 3:1 with the waste hydrochloric acid mass ratio of interpolation, reaction temperature is 60 DEG C, and the time is 1h, obtains solidliquid mixture (2)；3rd step, solidliquid mixture (2) sucking filtration that second step obtains after processing separates, and the residue after separating treatment is used for reclaiming aluminum, ferrum.Detecting alkali content in low alkali red mud by conventional method, analyzing alkali content in low alkali red mud is 1.6%.
Example four:
The first step, pulverizes red mud, and after grinding, red mud granularity is at 180 mesh, mixes with water, and Bayer process red mud and water weight ratio example are 1:8；CO it is passed through in Bayer process red mud2Carry out acidification reaction and obtain solidliquid mixture (1)；It is passed through CO2Flow is 0.8L/min, and reaction temperature is 70 DEG C, and the time is 1.5h；Second step, the solidliquid mixture (1) obtained to first step acidification reaction, add the waste hydrochloric acid that mass concentration is 20% and react, Bayer process red mud is 3:1 with the waste hydrochloric acid mass ratio of interpolation, reaction temperature is 60 DEG C, and the time is 1h, obtains solidliquid mixture (2)；3rd step, solidliquid mixture (2) sucking filtration that second step obtains after processing separates, and the residue after separating treatment is used for reclaiming aluminum, ferrum.Detecting alkali content in low alkali red mud by conventional method, analyzing alkali content in low alkali red mud is 2.1%.
Claims (1)
1. one kind utilizes CO2Method with spent acid Combined Treatment Bayer process red mud dealkalize, it is characterised in that the step of its processing procedure
Including:
(1) being pulverized by Bayer process red mud, Bayer process red mud grinding mesh number, 180, mixes with water, Bayer process red mud and water weight
Ratio is 1: 8, is passed through CO2Gas carries out acidification reaction, is passed through CO2Throughput is 0.8L/min, and reaction temperature is 70 DEG C,
Time is 1.5h, obtains solidliquid mixture 1.；
(2) react to the waste hydrochloric acid that solidliquid mixture 1. middle addition mass concentration is 20%, red mud and the waste hydrochloric acid matter of interpolation
Amount ratio is 3: 1, and reaction temperature is 60 DEG C, and the time is 1h, obtains solidliquid mixture 2.；
(3) after step (2) reaction, 2. the solidliquid mixture that obtains filters separation, the residue after separating treatment be used for reclaiming aluminum,
Ferrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310295802.5A CN104291539B (en) | 2013-07-16 | 2013-07-16 | One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310295802.5A CN104291539B (en) | 2013-07-16 | 2013-07-16 | One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104291539A CN104291539A (en) | 2015-01-21 |
| CN104291539B true CN104291539B (en) | 2016-09-28 |
Family
ID=52311532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310295802.5A Active CN104291539B (en) | 2013-07-16 | 2013-07-16 | One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104291539B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130142B (en) * | 2015-09-10 | 2018-01-05 | 中国科学院重庆绿色智能技术研究院 | A kind of method of non-Bayer process red mud depth dealkalize stage by stage |
| CN110354671A (en) * | 2019-07-30 | 2019-10-22 | 天津理工大学 | A kind of method of red mud and the processing of lime kiln exhaust gas common resourceization |
| CN111234350B (en) * | 2020-03-03 | 2021-04-20 | 中国地质大学（北京） | Composite board prepared from red mud, waste plastic and rice paper waste residues and preparation method thereof |
| CN112546529B (en) * | 2020-11-18 | 2022-03-11 | 洲际环境科学研究院(广州)有限公司 | Process for realizing dealkalization of high-alkalinity red mud by utilizing industrial waste residues and waste gases |
| CN114573253B (en) * | 2022-02-23 | 2023-05-16 | 山东大学 | Method for improving activity of physically activated, acidified and thermally activated red mud |
| CN114573199B (en) * | 2022-03-17 | 2023-04-25 | 山东省科学院能源研究所 | Fenton iron mud dealkalization and carbon dioxide capturing cooperative treatment system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU563304B2 (en) * | 1984-12-21 | 1987-07-02 | Comalco Aluminium Limited | Soz leach to recover soda and alumina from red mud with recycle to bayer process |
| CN101468866B (en) * | 2007-12-27 | 2011-04-20 | 中国科学院生态环境研究中心 | Normal atmosphere dealkalizing method by sintering |
-
2013
- 2013-07-16 CN CN201310295802.5A patent/CN104291539B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 动力学因素对拜尔法赤泥使用CO2脱钠的影响;庞永刚等;《四川大学学报（工程科学版）》;20120630;第44卷;第235-238页第1-4节 * |
| 拜耳法赤泥不同脱碱工艺的对比分析;张国立等;《无机盐工业》;20120831;第44卷(第8期);第41页第2.1-2.2节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104291539A (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104445844B (en) | Method for dealkalizing red mud by uniting smoke and basic material | |
| CN104291539B (en) | One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize | |
| CN104495899A (en) | Method for synergic resource utilization of acetylene sludge and coal ash | |
| US20200299145A1 (en) | Method for aluminum-enhanced dealkalization of red mud and separation and recovery of aluminum and iron | |
| CN101475194B (en) | Method for recycling ammonia from low concentration ammonium chloride wastewater | |
| CN103214201B (en) | Method for comprehensively utilizing electrolytic manganese residues | |
| CN102172598B (en) | Red mud slurrying multistage circulating dealkalization method | |
| CN108238832B (en) | Method for preparing soluble potassium and calcium silicate soil conditioner by alkali-activated potassium feldspar | |
| CN104310836A (en) | Modified phosphogypsum as well as preparation method and use of modified phosphogypsum | |
| CN103288116A (en) | Method for preparing high-purity calcium hydroxide from carbide slag | |
| CN102627309A (en) | Method for fixing CO2 in industrial waste gas by using calcium-based bulk industrial solid waste phosphogypsum through strengthening and carbonating | |
| CN101306819B (en) | Process for abstracting white carbon black from fly ash or slag | |
| CN104891855A (en) | A method of extracting rare earth sulfate from coal gangue and applying the rare earth sulfate as a concrete additive | |
| CN107188209A (en) | The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide | |
| CN102070287A (en) | Process for reducing chloride ions in white mud from ammonia soda plants | |
| CN111994937B (en) | Method for recycling calcium fluoride from fluorine-containing sludge | |
| CN103408050B (en) | Method of efficient extraction of aluminum, iron, and titanium in coal gangue | |
| CN101700894A (en) | Technology for preparing and synthesizing potassium sulphate by beneficiating method | |
| CN111072054A (en) | Preparation of high-purity gypsum powder and byproduct NH from phosphogypsum4Cl process | |
| CN101885504A (en) | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slag | |
| CN104528745A (en) | Method for preparing synthetic wollastonite with fly ash | |
| CN111689788B (en) | Alkali mud-based ceramsite and preparation method thereof | |
| CN111484081B (en) | Method for preparing manganese carbonate, ammonium sulfate and dry powder building coating by using electrolytic manganese leaching residues | |
| CN1298848A (en) | Process for preparing K fertilizer from non-soluble potassium ore and waste ammonia-soda solution | |
| CN206793393U (en) | Green ardealite solid waste processing reutilization system |
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 |