CN106311715B - A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry - Google Patents
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry Download PDFInfo
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- CN106311715B CN106311715B CN201610119528.XA CN201610119528A CN106311715B CN 106311715 B CN106311715 B CN 106311715B CN 201610119528 A CN201610119528 A CN 201610119528A CN 106311715 B CN106311715 B CN 106311715B
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- red mud
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- monazite
- mineral aggregate
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- 239000002002 slurry Substances 0.000 title claims abstract description 64
- 150000003839 salts Chemical class 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004566 building material Substances 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 39
- 239000011707 mineral Substances 0.000 claims abstract description 39
- 229910052742 iron Inorganic materials 0.000 claims abstract description 30
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 claims abstract description 28
- 229910052590 monazite Inorganic materials 0.000 claims abstract description 28
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 20
- 238000007885 magnetic separation Methods 0.000 claims abstract description 20
- 230000018044 dehydration Effects 0.000 claims abstract description 19
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012024 dehydrating agents Substances 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 6
- 230000005307 ferromagnetism Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 239000000941 radioactive substance Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000004131 Bayer process Methods 0.000 description 3
- HCWPIIXVSYCSAN-IGMARMGPSA-N Radium-226 Chemical compound [226Ra] HCWPIIXVSYCSAN-IGMARMGPSA-N 0.000 description 3
- 229910052776 Thorium Inorganic materials 0.000 description 3
- 229910052770 Uranium Inorganic materials 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000009866 aluminium metallurgy Methods 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910019598 RePO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910004369 ThO2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(IV) oxide Inorganic materials O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052585 phosphate mineral Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- ZSLUVFAKFWKJRC-UHFFFAOYSA-N thorium Chemical compound [Th] ZSLUVFAKFWKJRC-UHFFFAOYSA-N 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry, is included the following steps：A, red mud is spent into ionized water slurrying, slurry carries out magnetic separation with permanent-magnet material, selects radioactivity mineral aggregate therein, including ilmenite, iron ore and monazite；B, remaining slurry removes heavy metal therein by dehydration.The present invention is by the mineral analysis to red mud, according to the physical difference of different minerals, by the way that by red mud slurry permanent magnetism, radioactivity mineral aggregate therein, including iron ore, ilmenite, monazite and other substances are separated.After radioactivity in red mud is eliminated, magneticly elect the ilmenite, iron ore, monazite come, and the mineral aggregates such as heavy metal, it can also recycle, eat it is dry bleed red mud useful value while, the environmental pollution and security risk that red mud dam is brought not only are completely eliminated, resource is also alleviated, the pressure that environment is brought, realizes the unification of economic benefit, social benefit and environmental benefit.
Description
Technical field
It is the method for building materials that the present invention relates to a kind of using permanent-magnet material and salt slurry disposition red mud, belongs to environmental protection neck
Domain.
Background technology
Red mud is the industrial solid wastes in aluminum oxide production process, generally often production 1t aluminium oxide just generate 1.0~
1.8t red muds have the characteristics that strong basicity and high radioactivity two.According to the different process of alumina producing, red mud is divided into Bayer process
With two kinds of different types of sintering process.Aluminium content is high in bauxite, and using Bayer process aluminium metallurgy, generated red mud claims Bayer process red
Mud；Aluminium content is low in bauxite, and with sintering process aluminium metallurgy, generated red mud is known as red mud from sintering process.The disposition of red mud at present
Method is mainly stacked in stockyard for a long time.The construction of red mud dump can utilize the landform such as mountain valley, dell in mountain area, be stacked with dell；
Coastal area directly inputs deep-sea with pipeline, and natural sediment is in seabed.Above method will occupy a large amount of soils, and in red mud
Chemical composition infiltrates soil, causes the ecological environment problems such as soil alkalization, underground water pollution.The comprehensive utilization of red mud, although having
Many people carried out research, were such as used as building additive for building material field, be also useful for production sulfate cement brick,
The construction materials such as ceramic tile, insulating brick, microporous calcium silicate；Adaptation to local conditions, the geographical conditions residing for aluminium manufacturer carry out soil filling
With reclaim wasteland, with red mud filling stone pit, making roadbed, build sill may, neutralize acid soil etc.；It is prepared using red mud inorganic
Chemical material, water purification adsorbent etc.；Recycle Al contained in red mud2O3、TiO2、SiO2、Na2O, the oxides such as CaO, and contain
The metallic elements such as elements K, Mg, Ni, Zr, Sc, REE, radioactive element.But the above method rests on laboratory research more
Stage is not implemented scale and utilizes.Currently, red mud utilization rate, less than 10%, the accumulative volume of cargo in storage in the country is more than 50,000,000 t.
Currently, the maximum field that can dispose red mud completely is building material industry, but high radioactivity is to restrict application
Problem.There are strict demand in countries in the world to the specific radioactivity of construction material." radioactive material nucleic limits in China
Amount " (GB656622001) provides that the specific radioactivity of natural radionuclide 226Ra, 232Th and 40K are lived in construction main body material
When spending while meeting External Exposure Index IRa≤1.0 and Outreach services Ir≤1.0, production and marketing is unrestricted with use scope；Dress
Repair in material the specific radioactivity of natural radionuclide 226Ra, 232Th and 40K at the same meet External Exposure Index IRa≤
1.0 and Outreach services Ir≤1.3 requirements are A class finishing materials；A class finishing material production and marketing and use scope are unrestricted.
The radioactive elements preservations such as bauxite usually contained U, Th are in heavy metal and monazite.Heavy metal theoretical content is
ZrO267.2%, SiO232.8%, usually contain 0.5%~4%HfO2, 0.35%Fe2O3, 0.05%~4%CaO and a small amount of
The elements such as Re, Nb, Ta, Th, U.Monazite (RePO4) it is the phosphate mineral containing light rare earth elements, in addition to containing Th, U, still contain
ZrO2、SiO2Equal impurity, mainly organizing becomes:Re2O3About 60%, ThO2About 12%, UO3With micro Ra (0.1%~0.3%)；
Hardness 5.0~5.5,4.6~5.4g/cm of density3.In aluminum oxide production process, 90% or more radioactive element is enriched to
It is the universal higher basic reason of radioactivity in red mud in red mud.
Invention content
It is the method for building materials, Neng Gouhuan that the purpose of the present invention is to provide a kind of using permanent-magnet material and salt slurry disposition red mud
It protects, at low cost detach the radioactive substance (heavy metal and monazite) in red mud from red mud slurry, being enriched with and come out, to reach
It reduces, even be eliminated the radioactive purpose of red mud.
The present invention adopts the following technical scheme that：
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry, is included the following steps：A, red mud is spent
Ionized water slurrying, slurry carry out magnetic separation with permanent-magnet material, select radioactivity mineral aggregate therein, including ilmenite, iron ore and solely
Occupy stone；B, remaining slurry removes heavy metal therein by dehydration.
Further, the magnetic separation in the step a is that slurry passes through the permanent magnetism system that magnetic field intensity is 6500-6800 Gausses
System, selects radioactivity mineral aggregate therein, including ilmenite, iron ore, monazite, the mineral aggregate selected is less than by magnetic field intensity again
The magnetic separation system of 6500 Gausses selects mineral aggregate containing ferromagnetism, including iron ore, ilmenite, makes monazite and iron content radioactivity mineral aggregate
Separation, makes monazite further be enriched with.
Further, the dehydration in the step b is：By weight, it is added by 50-150 in 1000 parts of slurries
Part salt slurry, the dehydrating agent of 100-200 parts of ferric trichlorides composition, is dehydrated in the medium of pH >=12, will be weighed after mixing
Metal is separated.
Further, the salt slurry that the dehydrating agent uses is chlor-alkali plant salt slurry.
Further, the pH value of the dehydration mediators is 12-12.5.
By the above-mentioned description of this invention it is found that compared to the prior art, the invention has the advantages that：
The present invention is by the mineral analysis to red mud, according to the physical difference of different minerals, by the way that red mud slurry is strong
Magnetic separation (is more than 6500 Gausses), and radioactivity mineral aggregate therein, including iron ore, ilmenite, monazite and other substances are isolated
Come, select ilmenite and iron ore using low intensity magnetic separation so that monazite separation, enrichment come out, and then will contain heavy metal
The combination medicament that slurry is added based on salt slurry is dehydrated in high alkalinity (pH ＞ 12) medium, and heavy metal is therefrom divided
From, enrichment, with reduce even thoroughly eliminate red mud radioactivity, so that the radioactivity of its slag charge is reached radioactivity of building materials national standard
A class building standards, production and marketing need not be restricted with use scope, carry forward vigorously red mud answering in building material field
With.Tested through applicant, according to the method for the present invention treated red mud slurries, detect its radionuclide radium-226, thorium -232,
Radiation specific activity Ira≤1.0, Ir≤1.0 of kalium-40.After radioactivity in red mud is eliminated, the ilmenite come, iron are magneticly elected
The mineral aggregates such as mine, monazite and heavy metal, additionally it is possible to recycle, eat it is dry bleed red mud useful value while, it is not only thorough
Bottom eliminates the environmental pollution and security risk that red mud dam is brought, and also alleviates resource, the pressure that environment is brought, realize through
The unification for the benefit, social benefit and environmental benefit of helping.
Specific implementation mode
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry, is included the following steps：A, red mud is spent
Ionized water slurrying, slurry carry out magnetic separation with permanent-magnet material, select radioactivity mineral aggregate therein, including ilmenite, iron ore and solely
Occupy stone；B, remaining slurry removes heavy metal therein by dehydration.It can be by the radioactive substance in red mud by the above method
Separation, enrichment, reduce the radioactivity of red mud.
Magnetic separation in the step a is slurry by the permanent magnet system that magnetic field intensity is 6500-6800 Gausses, is selected wherein
Radioactivity mineral aggregate, including ilmenite, iron ore, monazite, the mineral aggregate selected is less than the magnetic of 6500 Gausses by magnetic field intensity again
System is selected, mineral aggregate containing ferromagnetism, including iron ore, ilmenite are selected, so that monazite is detached with iron content radioactivity mineral aggregate, makes monazite
Further enrichment.
Dehydration in the step b is：By weight, it is added in 1000 parts of slurries by 50-150 parts of salt slurries,
The dehydrating agent of 100-200 parts of ferric trichlorides composition, is dehydrated in the medium of pH >=12, heavy metal is detached after mixing
Out, it is chlor-alkali plant salt slurry to state the salt slurry that dehydrating agent uses.It is tested through applicant, is directly added into salt slurry, can also select a huge sum of money
Belong to, but effect is not ideal enough.The proportioning of dehydrating agent of the present invention can be dehydrated in high alkalinity medium, and dehydration mediators
PH value reach 12-12.5, dehydrating effect is best, to improve the pH value of dehydration mediators, reaches best dehydrating effect.Through application
People tests, and the heavy metal dehydration rate of recovery in red mud can reach 80% or more.
Embodiment one
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry, is included the following steps：A, red mud is spent
Ionized water slurrying, slurry carry out magnetic separation with permanent-magnet material, select radioactivity mineral aggregate therein, including ilmenite, iron ore and solely
Occupy stone；B, remaining slurry removes heavy metal therein by dehydration.It can be by the radioactive substance in red mud by the above method
Separation, enrichment, reduce the radioactivity of red mud.
Magnetic separation in the step a is slurry by the permanent magnet system that magnetic field intensity is 6600 Gausses, selects therein put
Penetrating property mineral aggregate, including ilmenite, iron ore, monazite, the mineral aggregate selected are less than the magnetic separation system of 6500 Gausses by magnetic field intensity again
System, selects mineral aggregate containing ferromagnetism, including iron ore, ilmenite, so that monazite is detached with iron content radioactivity mineral aggregate, make monazite into one
Step enrichment.
Dehydration in the step b is：By weight, it is added in 1000 parts of slurries by 50 parts of salt slurries, 100 part three
The dehydrating agent of iron chloride composition, is dehydrated in the medium of pH=12, heavy metal is separated, state dehydration after mixing
The salt slurry that agent uses is chlor-alkali plant salt slurry.
Embodiment two
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry, is included the following steps：A, red mud is spent
Ionized water slurrying, slurry carry out magnetic separation with permanent-magnet material, select radioactivity mineral aggregate therein, including ilmenite, iron ore and solely
Occupy stone；B, remaining slurry removes heavy metal therein by dehydration.It can be by the radioactive substance in red mud by the above method
Separation, enrichment, reduce the radioactivity of red mud.
Magnetic separation in the step a is slurry by the permanent magnet system that magnetic field intensity is 6700 Gausses, selects therein put
Penetrating property mineral aggregate, including ilmenite, iron ore, monazite, the mineral aggregate selected are less than the magnetic separation system of 6500 Gausses by magnetic field intensity again
System, selects mineral aggregate containing ferromagnetism, including iron ore, ilmenite, so that monazite is detached with iron content radioactivity mineral aggregate, make monazite into one
Step enrichment.
Dehydration in the step b is：By weight, it is added in 1000 parts of slurries by 100 parts of salt slurries, 150 parts
The dehydrating agent of ferric trichloride composition, is dehydrated in the medium of pH=12.25, heavy metal is separated after mixing,
It is chlor-alkali plant salt slurry to state the salt slurry that dehydrating agent uses.
Embodiment three
A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry, is included the following steps：A, red mud is spent
Ionized water slurrying, slurry carry out magnetic separation with permanent-magnet material, select radioactivity mineral aggregate therein, including ilmenite, iron ore and solely
Occupy stone；B, remaining slurry removes heavy metal therein by dehydration.It can be by the radioactive substance in red mud by the above method
Separation, enrichment, reduce the radioactivity of red mud.
Magnetic separation in the step a is slurry by the permanent magnet system that magnetic field intensity is 6800 Gausses, selects therein put
Penetrating property mineral aggregate, including ilmenite, iron ore, monazite, the mineral aggregate selected are less than the magnetic separation system of 6500 Gausses by magnetic field intensity again
System, selects mineral aggregate containing ferromagnetism, including iron ore, ilmenite, so that monazite is detached with iron content radioactivity mineral aggregate, make monazite into one
Step enrichment.
Dehydration in the step b is：By weight, it is added in 1000 parts of slurries by 150 parts of salt slurries, 200 parts
The dehydrating agent of ferric trichloride composition, is dehydrated in the medium of pH=12.5, heavy metal is separated, stated after mixing
The salt slurry that dehydrating agent uses is chlor-alkali plant salt slurry.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, Ren Hewei
Be detached from technical solution of the present invention content, according to the technical essence of the invention to made by above example it is any it is simple modification, etc.
With variation and modification, in the range of still falling within technical solution of the present invention.
Claims (3)
1. a kind of disposing the method that red mud is building materials using permanent-magnet material and salt slurry, it is characterised in that：Include the following steps：A, will
Red mud spends ionized water slurrying, and slurry carries out magnetic separation with permanent-magnet material, selects radioactivity mineral aggregate therein, including ilmenite,
Iron ore and monazite；B, remaining slurry removes heavy metal therein by dehydration；Dehydration in the step b is：By weight
Gauge is added in 1000 parts of slurries by 50-150 parts of salt slurries, and the dehydrating agent of 100-200 parts of ferric trichlorides composition is uniformly mixed
It is dehydrated in the medium of pH >=12 afterwards, heavy metal is separated；The pH value of the dehydration mediators is 12-12.5.
2. according to claim 1 a kind of using permanent-magnet material and method that salt slurry disposition red mud is building materials, feature exists
In：Magnetic separation in the step a is slurry by the permanent magnet system that magnetic field intensity is 6500-6800 Gausses, selects therein put
Penetrating property mineral aggregate, including ilmenite, iron ore, monazite, the mineral aggregate selected are less than the magnetic separation system of 6500 Gausses by magnetic field intensity again
System, selects mineral aggregate containing ferromagnetism, including iron ore, ilmenite, so that monazite is detached with iron content radioactivity mineral aggregate, make monazite into one
Step enrichment.
3. according to claim 1 a kind of using permanent-magnet material and method that salt slurry disposition red mud is building materials, feature exists
In：The salt slurry that the dehydrating agent uses is chlor-alkali plant salt slurry.
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| CN201610119528.XA CN106311715B (en) | 2016-03-03 | 2016-03-03 | A method of it is building materials to dispose red mud using permanent-magnet material and salt slurry |
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| CN106311715B true CN106311715B (en) | 2018-10-16 |
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| CN102992378A (en) * | 2012-09-29 | 2013-03-27 | 贵州绿水青山环保科技有限公司 | Red mud material treating method |
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| CN101773925A (en) * | 2010-02-03 | 2010-07-14 | 河南易道科技有限公司 | Treatment method for recycling waste red mud residues |
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