CN106477976A - A kind of Application way of red mud - Google Patents
A kind of Application way of red mud Download PDFInfo
- Publication number
- CN106477976A CN106477976A CN201610918459.9A CN201610918459A CN106477976A CN 106477976 A CN106477976 A CN 106477976A CN 201610918459 A CN201610918459 A CN 201610918459A CN 106477976 A CN106477976 A CN 106477976A
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- CN
- China
- Prior art keywords
- red mud
- filter pressing
- coal cinder
- powdered coal
- application way
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- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0409—Waste from the purification of bauxite, e.g. red mud
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A kind of Application way of red mud, is related to a kind of method of comprehensive utilization of the red mud waste of generation in aluminum oxide production process.It is characterized in that it is included using the step of process：(1) red mud is carried out filter pressing；(2) powdered coal cinder is crushed：(3) the powdered coal cinder mixing after crushing red mud after the filter pressing of step (1) and step (2), adds pitch prill to carry out kneading；(4) material obtaining after the kneading of step (3) is carried out molding；(5) material obtaining after the molding of step (4) is sintered.The method of the present invention, the product producing can be applicable to construction of reclamation, sea wall construction, islands and reefs construction, control of desert, the build of rivers embankment, bank protection construction, park, street, road and insulation etc. etc., huge building resource can be saved, be that red mud comprehensive utilization opens effective way.
Description
Technical field
A kind of Application way of red mud, is related to a kind of comprehensive utilization side of the red mud waste of generation in aluminum oxide production process
Method.
Background technology
Red mud be with bauxite for raw material production alumina process in the fines strong basicity that produces with necessarily putting
Penetrating property solid waste.China is the maximum country of world's alumina producing, and national aluminium oxide yield reaches 58,980,000 tons within 2015, red mud
About 70,000,000 tons of yield；China is accumulative to produce about 5.2 hundred million tons of red mud, and the utilization rate of red mud is less than 5%.
Because bauxite is different with process for making alumina, the property producing red mud is also different.Usually will be using Bayer process
Produce red mud produced by aluminium oxide and claim Bayer process red mud；Will be using sintering process, sintering process and Bayer process Joint Production aluminium oxide
Produced red mud is referred to as red mud from sintering process, combines and send out red mud.
Red mud chemical composition is approximately as table
Unit:%
Contain the alkali metal oxide of about 3%-14% in red mud, and major part is weak binding alkali and half free alkali；Sintering
The main chemical compositions that method red mud contains are silicon oxide and calcium oxide, account for the 50% of total amount；Bayer process red mud chemical composition has
There is sodium content high, calcium oxide content is low, the higher feature of iron content.
The granularity of red mud is substantially：
Red mud radiological measuring result is substantially：
Unit：Bq/kg
China does not have ready-made standard, be not used in Muscovite cement building house, public and productivity building special
With allowing in cement to be less than 740Bq/kg, usually do not allow more than 370Bq/kg.
The moisture content of red mud filter pressing material is typically in 25%--35%.
Red mud, as the red mud producing in aluminum oxide production process, mainly has following harm：(1) storing up red mud needs to take
Substantial amounts of land resource.At present, up to 80,000,000 tons of China's red mud annual emissions, by the high 10 meters of calculating of heap, take up an area about 712 public
Hectare, if storing up 10 years, 10 yuan of calculating per ton every year pressed by stockyard construction cost and maintenance cost, and only building maintenance cost just needs cost
8000000000 yuan.(2) pollution that in red mud, alkali liquor and stockyard airborne dust produce to surrounding enviroment is on the rise, and red mud has become harm area
The important polluter of environment, drastically influence the sustainable development of ecological balance and the mankind.(3) red mud pilling technical difficulty big,
High cost, hidden danger are big.Red mud from sintering process and mixed combining method red mud, according to itself congealing property, can build a dam in a wet process and store up, but difficult
To solve quickly storing up of a large amount of red muds, once occurring the produced loss of dam break to be huge；Bayer process red mud generally requires
Dry method is stored up, and red mud, through the operation such as being dehydrated, conveying, tedding, being compacted, needs larger stockyard space, stores up maintenance cost high
High.(4) red mud comprehensive utilization technique is global problem.Because of the presence of alkali, radioactive impact, impact of cost etc., red
Large Utilizing question of mud is not solved so far at all.(5) radiological hazard.Bauxite is through process for making alumina
Afterwards, produced red mud, its radioactive substance is enriched with, and brings certain harm to the health of environment and people.
Red mud comprehensive utilization at present is global problem, abroad mostly takes to store up and contain and fills out sea；China is through 60
Years of researches are developed although having made some progress, such as Bayer process red mud carry ferrum, non-burning brick, sintering ceramsite, build the road, made ground,
Devitrified glass, desulfurizing agent etc., but generally still fall within and do not solve at all, current China red mud utilization rate less than 5% it would be highly desirable to
Solve.
Content of the invention
The purpose of the present invention is aiming at the deficiency that above-mentioned prior art exists, and provides a kind of energy effectively solving that red mud is oozed
A difficult problem for saturating or attachment the permanently effective consolidation of alkaloid substance, consolidates alkali and prevents making good use of of alkali infiltration, and will not be right
The Application way of the red mud that underground, ground environment work the mischief.
The purpose of the present invention is achieved through the following technical solutions.
A kind of Application way of red mud is it is characterised in that it is included using the step of process：
(1) red mud is carried out filter pressing；
(2) powdered coal cinder is crushed：
(3) the powdered coal cinder mixing after will be broken to red mud after the filter pressing of step (1) and step (2), adds Colophonium to carry out kneading；
(4) material obtaining after the kneading of step (3) is obtained molding mass block for building through vibration moulding or extruding.
A kind of Application way of red mud of the present invention is it is characterised in that it obtains molding for building through vibration moulding or extruding
Material block, is also sintered.
A kind of Application way of the red mud of the present invention it is characterised in that after the described filter pressing of step (1) red mud aqueous
Rate is：1% 39%.
A kind of Application way of the red mud of the present invention it is characterised in that described step (2) crush after powdered coal cinder
Granularity is less than 110mm.
A kind of Application way of red mud of the present invention is it is characterised in that red mud and step (1) after described step (3) filter pressing
The ratio of the powdered coal cinder mixing after broken is 1:0‐1:5, add Colophonium amount be：5% 35%.
A kind of Application way of red mud of the present invention is it is characterised in that the material obtaining after described step (4) molding enters
The temperature of row sintering is 300 DEG C 1350 DEG C, and the time of sintering is 5 hours to 40 hours.
A kind of Application way of red mud of the present invention, is the basis in long term production, theoretical research and scientific experimentss
On, make full use of " two negatives make a positive " principle, produce when the red mud producing waste is generated electricity with steam power plant in aluminum oxide production process
The waste such as powdered coal cinder as aggregate, the pitch as binder being produced with Coal Chemical Industry or petrochemical industry, through kneading, molding etc.
Various useful materials of different shapes are obtained after technical process.
The present invention utilizes Colophonium organic macromolecule to surround red mud granule, successfully solves to red mud infiltration or attachment alkali
This global problem of permanently effective consolidation of material.Effect red mud product being served with consolidation alkali and preventing alkali infiltration,
Can store up for a long time and use, more can be in sea wall construction, bank protection, rivers flood control, build embankment, islands and reefs construction, Desert Control etc.
Numerous areas play good effect, and underground, ground environment will not be worked the mischief, and have fully demonstrated and have turned waste into wealth, have benefited
The mankind.
Further, since the interpolation of the waste such as the encirclement of Colophonium organic macromolecule and powdered coal cinder, effectively alleviate and dilute
The activity of radioactive substance in red mud, reaches the radiation activity of environment permission, efficiently solves radioactive harm.
Meanwhile, using Colophonium organic macromolecule material be hydrone effective deadening material, efficiently solve overseas
Interpenetrate exchange between water and red mud product, prevent pollution problem again；And Colophonium is good binding material, by red mud
Closely bond together in waste, make the various physical properties of product good；The inventive method can utilize red mud in a large number, big rule
Mould produces red mud product, process is simple, reduced investment, products application extensively, " eat dry squeeze net " of achievable red mud, benefit enterprise and
The mankind, economic benefit and social benefit are especially huge.
Brief description
Fig. 1 is a kind of process chart of the Application way of red mud of the present invention.
Specific embodiment
A kind of Application way of red mud, it is included using the step of process：(1) red mud is carried out filter pressing；Red mud after filter pressing
Moisture content be：1% 39%；(2) powdered coal cinder is crushed：The granularity of the powdered coal cinder after broken is less than 110mm；
(3) the powdered coal cinder mixing after crushing red mud after the filter pressing of step (1) and step (2), adds pitch prill to carry out kneading；Its filter pressing
The ratio of the powdered coal cinder mixing after red mud and step (2) crush afterwards is 1:0‐1:5, add Colophonium amount be：5% 35%；
(4) material obtaining after the kneading of step (3) is carried out being shaped to molding for building using vibration moulding or extrusion process
Material block；The material obtaining after the molding of step (4) can also be sintered, and improves its performance, and the temperature of its sintering is 300
DEG C 1350 DEG C, the time of sintering is 5 hours to 40 hours.
A kind of Application way of the red mud of the present invention, the product after sintering, not only eliminate original red mud and contain alkali and contain
Necessarily radioactive harm, and through Colophonium organic macromolecule as binding agent and vibration moulding or extrusion molding (according to need
Determine whether to sinter) after, its product strength, corrosion resistance, excellent, subject range of putting the various index of permeability, waterproof etc.
Extensively, main usess field is as follows：
1. fill out the construction of sea, sea wall and islands and reefs
There are 1.8 ten thousand kilometers of coastlines and many islands and reefs in China, it is desirable to have resistant to sea water corrodes and has the building body of good strength
Material, the mixing material such as large-scale, medium-sized, small-sized that the application present invention produces, go for reclamation completely, sea wall is built
If, islands and reefs construction, not only enable twice laid, and efficiently solve a pollution difficult problem, save a lot of other simultaneously and build
Build material resources, have low production cost, construction speed fast the features such as.
2. rivers embankment is built
China great river, river are numerous, and big flood has generation over the years, and the life giving people and property cause huge disaster,
Make full use of the red mud composite of the present invention, reinforce or building dam of river, it is extraordinary for resisting and enhancing the capacity of preventing floods
Cheap material, neither causes new pollution, saves ample resources again, realizes waste synthesis effectively utilizes, promotes the well-being of mankind.
3. slop protection material
China is vast in territory, and geologic structure is complicated, and natural disaster takes place frequently.For more effectively reinforcing various dangerous slopes, anti-on-slip
The natural disasters such as slope, mud-rock flow, the product that application the inventive method produces is effectively reduced disaster and occurs.
4. Desert Control
Northern China desert region is wide, administers slow, annual sandstorm all has generation, the life to people and environment band
To have a strong impact on.For effective Desert Control and the generation preventing or reducing sandstorm, application product of the present invention can be in desert depth
New " desertification Great Wall " is built in area, also creates favorable conditions for effective control of desert of carrying out.
5. the construction of park, street, road etc.
According to the construction requirements of park, street, road etc., available the inventive method produces the construction material of all kinds of demands
Material, meets construction of park, street is built, the needs of road construction.
6. insulation building materials
According to the needs built, apply the present invention, through stirring, compressing, can with manufactured Board, pipe, block, special-shaped make
Product, be applied to pipeline, about body of wall, about equipment etc. thermal insulation building material.
7. enclosure wall construction
It is adapted to the enclosure walls such as various places, factory construction etc..
A kind of Application way of the red mud of the present invention, various Colophoniumes (including but not limited to coal tar pitch, the oil drip of employing
Green grass or young crops, bitumen etc.) it is used in mixed way technology as binding agent and red mud.Using various Colophoniumes (including but not limited to coal tar pitch, stone
Oil asphalt, bitumen etc.) as effectively anti-pollution material, consolidate the alkali in red mud, put the technology such as infiltration, LP blades.Using
Various Colophoniumes (including but not limited to selected from coal tar pitch and petroleum asphalt, bitumen etc.) are as binding agent and with red mud, powdered coal cinder etc.
The mixture of all proportions that waste material mixes as aggregate is formed through the mode such as vibration moulding or extrusion molding or calendering
Variously-shaped material.The block technology of large-scale red mud mixing is produced using the kneading machine of aluminium cathode industry, vibrating forming machine.
Embodiment 1
Red mud is carried out filter pressing；After filter pressing, the moisture content of red mud is：10%；Powdered coal cinder is crushed：After broken
The granularity of powdered coal cinder is less than 30mm；After filter pressing red mud and broken after powdered coal cinder press red mud and powdered coal cinder part by weight
For 1:0.5 is mixed, and adds the 15% of red mud and powdered coal cinder weight Colophonium to carry out kneading；Using vibration moulding or extruding
Forming method carries out being shaped to rectangular block；The rectangular block obtaining after molding is sintered 35 hours at a temperature of 600 DEG C, obtains rectangle
Block is built by laying bricks or stones for factory's enclosure wall, and application effect is good.
Embodiment 2
Red mud is carried out filter pressing；After filter pressing, the moisture content of red mud is：15%；Powdered coal cinder is crushed：After broken
The granularity of powdered coal cinder is less than 30mm；After filter pressing red mud and broken after powdered coal cinder press red mud and powdered coal cinder part by weight
For 1：0.8 is mixed, and adds the 16% of red mud and powdered coal cinder weight Colophonium to carry out kneading；Using vibration moulding or extruding
Forming method carries out being shaped to rectangular block；The rectangular block obtaining after molding is sintered 30 hours at a temperature of 800 DEG C, sintering obtains
Rectangular block be used for earth works engineer applied effect good.
Embodiment 3
Red mud is carried out filter pressing；After filter pressing, the moisture content of red mud is：20%；Powdered coal cinder is crushed：After broken
The granularity of powdered coal cinder is less than 40mm；After filter pressing red mud and broken after powdered coal cinder press red mud and powdered coal cinder part by weight
For 1：1 is mixed, and adds the 18% of red mud and powdered coal cinder weight Colophonium to carry out kneading；Carried out using extrusion process
It is shaped to floor tile；Floor tile will be obtained it will be directly used in the construction of river levee construction pond related with park dykes and dams, dykes and dams after molding
Firm.
Embodiment 4
Red mud is carried out filter pressing；After filter pressing, the moisture content of red mud is：30%；Powdered coal cinder is crushed：After broken
The granularity of powdered coal cinder is less than 35mm；After filter pressing red mud and broken after powdered coal cinder press red mud and powdered coal cinder part by weight
For 1：2 are mixed, and add the 20% of red mud and powdered coal cinder weight Colophonium to carry out kneading；Carried out using extrusion process
It is shaped to rectangle adobe；20 hours that rectangle adobe is sintered at a temperature of 1100 DEG C, the fragment of brick that sintering is obtained is used for sea wall, river
Dike and park enclosure wall are built, and application effect is good.
Embodiment 5
Red mud is carried out filter pressing；After filter pressing, the moisture content of red mud is：39%；Powdered coal cinder is crushed：After broken
The granularity of powdered coal cinder is less than 110mm；After filter pressing red mud and broken after powdered coal cinder press red mud and powdered coal cinder weight ratio
Example is 1：5 are mixed, and add the 5% of red mud and powdered coal cinder weight Colophonium to carry out kneading；Entered using extrusion process
Row is shaped to rectangle adobe；5 hours that rectangle adobe is sintered at a temperature of 1360 DEG C, sintering be obtained fragment of brick be used for sea wall,
River levee and park enclosure wall are built, and application effect is good.
Embodiment 6
Red mud is carried out filter pressing；After filter pressing, the moisture content (weight) of red mud is：1%；After filter pressing, red mud adds red mud weight
35% Colophonium carry out kneading；Carry out being shaped to rectangle adobe using extrusion process；By rectangle adobe in 300 DEG C of temperature
40 hours of lower sintering, the fragment of brick that sintering is obtained is used for sea wall, river levee and park enclosure wall and builds, and application effect is good.
Claims (6)
1. a kind of Application way of red mud is it is characterised in that it is included using the step of process：
(1) red mud is carried out filter pressing；
(2) powdered coal cinder is crushed：
(3) the powdered coal cinder mixing after crushing red mud after the filter pressing of step (1) and step (2), adds Colophonium to carry out kneading；
(4) material obtaining after the kneading of step (3) is obtained molding mass block for building through vibration moulding or extruding.
2. a kind of Application way of red mud according to claim 1 is it is characterised in that it obtains through vibration moulding or extruding
Molding mass block for building, is also sintered.
3. a kind of Application way of red mud according to claim 1 is it is characterised in that red after the described filter pressing of step (1)
The moisture content of mud is：1% 39%.
4. a kind of red mud according to claim 1 Application way it is characterised in that described step (2) crush after powder
The granularity of coal ash is less than 110mm.
5. a kind of Application way of red mud according to claim 1 is it is characterised in that red mud after described step (3) filter pressing
The ratio of the powdered coal cinder mixing after crushing with step (1) is 1:0‐1:5, add Colophonium amount be：5% 35%.
6. a kind of Application way of red mud according to claim 2 is it is characterised in that obtain after described step (4) molding
The temperature that is sintered of molding mass block for building be 300 DEG C 1350 DEG C, the time of sintering is 5 hours 40 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610918459.9A CN106477976A (en) | 2016-10-21 | 2016-10-21 | A kind of Application way of red mud |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610918459.9A CN106477976A (en) | 2016-10-21 | 2016-10-21 | A kind of Application way of red mud |
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| CN106477976A true CN106477976A (en) | 2017-03-08 |
Family
ID=58270991
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| CN201610918459.9A Pending CN106477976A (en) | 2016-10-21 | 2016-10-21 | A kind of Application way of red mud |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109053145A (en) * | 2018-10-17 | 2018-12-21 | 沈阳航空航天大学 | A kind of sludge mixing lightweight aggregate and its preparation process |
| CN110219217A (en) * | 2019-06-19 | 2019-09-10 | 山东省交通科学研究院 | A kind of Bituminous stabilized silt base light traffic pavement structure |
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| CN101747018A (en) * | 2009-12-21 | 2010-06-23 | 郑洪建 | Formula of sintered brick with red mud |
| CN101830707A (en) * | 2010-03-29 | 2010-09-15 | 郑州市磊鑫实业有限公司 | Method for producing baked bricks from alumina red mud |
| CN104891920A (en) * | 2015-05-07 | 2015-09-09 | 刘林 | Anti-freezing fly ash brick and manufacturing method thereof |
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- 2016-10-21 CN CN201610918459.9A patent/CN106477976A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004071987A1 (en) * | 2003-02-17 | 2004-08-26 | Greenbuild Group | Building materials made from waste materials and method for making same |
| CN101205126A (en) * | 2006-12-22 | 2008-06-25 | 洛阳中超非金属材料有限公司 | Red-mud coal ash baking-free brick |
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| CN101747018A (en) * | 2009-12-21 | 2010-06-23 | 郑洪建 | Formula of sintered brick with red mud |
| CN101830707A (en) * | 2010-03-29 | 2010-09-15 | 郑州市磊鑫实业有限公司 | Method for producing baked bricks from alumina red mud |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109053145A (en) * | 2018-10-17 | 2018-12-21 | 沈阳航空航天大学 | A kind of sludge mixing lightweight aggregate and its preparation process |
| CN110219217A (en) * | 2019-06-19 | 2019-09-10 | 山东省交通科学研究院 | A kind of Bituminous stabilized silt base light traffic pavement structure |
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