CN113562993A - Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag - Google Patents
Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag Download PDFInfo
- Publication number
- CN113562993A CN113562993A CN202110828352.6A CN202110828352A CN113562993A CN 113562993 A CN113562993 A CN 113562993A CN 202110828352 A CN202110828352 A CN 202110828352A CN 113562993 A CN113562993 A CN 113562993A
- Authority
- CN
- China
- Prior art keywords
- fly ash
- sodium bicarbonate
- carbide slag
- water treatment
- treatment agent
- 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.)
- Pending
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 48
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000002893 slag Substances 0.000 title claims abstract description 25
- 150000004645 aluminates Chemical class 0.000 title claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 24
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 22
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000000643 oven drying Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 18
- 239000002253 acid Substances 0.000 abstract description 15
- 229960000907 methylthioninium chloride Drugs 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 10
- 239000003513 alkali Substances 0.000 abstract description 7
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 abstract 1
- 239000010908 plant waste Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 11
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 10
- 239000010883 coal ash Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 238000011978 dissolution method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004965 Silica aerogel Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 description 1
- 229940063656 aluminum chloride Drugs 0.000 description 1
- 229940009861 aluminum chloride hexahydrate Drugs 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910021331 inorganic silicon compound Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention relates to a method for preparing an aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag. Drying the fly ash, sodium bicarbonate and carbide slag in an oven; the mass fraction of the fly ash, the sodium bicarbonate and the carbide slag is 1: (0.4-1.2): (0.8-1.6) grinding and fully mixing; transferring the uniformly mixed and ground materials into a ceramic crucible, and roasting in a muffle furnace; setting the roasting temperature of a muffle furnace (700-; the obtained material is the aluminate water treatment agent. The removal efficiency of methylene blue is researched and can reach more than 90%. In the process of the invention, a large amount of alkali and acid are not needed, and the raw materials are two kinds of power plant waste residues. The purpose of making waste by waste is achieved, and the raw material cost is greatly saved; and the economic benefit is great, and the environment is not polluted.
Description
Technical Field
The invention belongs to the field of water treatment, and particularly relates to a method for preparing an aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag.
Background
The coal powder furnace coal ash is formed by quickly cooling coal after high-temperature combustion (1300-1400 ℃), and the main components of the coal powder furnace coal ash comprise aluminum oxide, ferric oxide, calcium oxide, aluminum oxide and the like. The alumina content in the high-alumina pulverized coal furnace fly ash can reach about 50 percent. The phase mainly comprises mullite, quartz, vitreous body and other inert substances, the particles are in a regular spherical shape, the structure is compact, the activity is poor, the particles are difficult to be directly extracted and utilized by an acid-soluble or alkali-soluble method, the inert substances in the fly ash need to be pretreated by a physical/chemical method and then alumina is extracted. However, the reserves of high-quality bauxite in China are small, and on the other hand, the high-quality bauxite is increasingly scarce in recent years due to the exploitation of the bauxite. The content of alumina in the fly ash is generally 17-35%, and the content of alumina in the fly ash in partial areas can be as high as 40-60%, so that the fly ash is an important non-traditional alumina resource.
In recent years, in order to solve the problems of precious and poor bauxite resources, environmental pollution caused by fly ash and the like in China, high-value utilization of fly ash becomes a research hotspot of various domestic colleges and schools and scientific research institutions.
Chinese patent N201710197423.0 discloses a process for extracting alumina from pulverized coal furnace fly ash by an acid method, which relates to a process for extracting alumina from pulverized coal furnace fly ash by an acid method, ammonium sulfate is added into the pulverized coal furnace fly ash for activation, then high-temperature calcination is carried out to obtain activated pulverized coal ash clinker, hydrochloric acid is added for heating and dissolution, and aluminum chloride dissolution liquid is obtained; and (3) introducing hydrogen chloride gas into the dissolution liquid for crystallization, carrying out solid-liquid separation and washing to obtain high-purity aluminum chloride hexahydrate crystals and waste acid liquid, and calcining the crystals to generate metallurgical-grade aluminum oxide. And adding inorganic salt chlorides such as calcium chloride or magnesium chloride into the waste acid, heating, extracting, distilling and recovering hydrochloric acid and hydrogen chloride gas, and reusing the hydrochloric acid and the hydrogen chloride gas in the dissolution and crystallization processes.
Chinese patent CN101041450B "clean production process for preparing alumina and white carbon black by using high alumina fly ash" takes sodium carbonate as ingredient, decomposes high alumina fly ash at medium temperature to generate acid-soluble aluminosilicate material, acid-soaks the sinter material with dilute sulphuric acid to separate alumina and silica in the high alumina fly ash; the obtained aluminum-containing liquid part is further processed to generate aluminum hydroxide precipitate, the aluminum hydroxide precipitate is calcined to prepare aluminum oxide, and the silica-containing colloidal part is purified, washed, dried and calcined to prepare inorganic silicon compound products such as white carbon black, silica aerogel, superfine silica, porous silica and the like.
Chinese patent CN101759210B, a method for extracting high-purity alumina and silica gel from fly ash, adopts the steps of cyclic activation, leaching, carbon separation, sodium carbonate and water recovery, silicon-aluminum separation, pyrolysis, hydrochloric acid recovery and the like to obtain the high-purity alumina and silica gel from the fly ash, and similarly Chinese patent CN101254933B, a method for extracting the high-purity alumina and silica gel from the fly ash, wherein the process can ensure that the extraction rate of the alumina and the silica gel in the fly ash reaches more than 90 percent.
The inventive methods in the above patents all suffer from the same problems: the consumption of acid and alkali is very large due to the limitation of chemical conditions, waste acid and waste alkali liquor are generated in the process and cannot be recycled, and the cost of raw materials is very high, so that the technologies are difficult to industrialize.
In conclusion, the method for extracting the aluminum salt from the fly ash by using the sodium bicarbonate and the carbide slag and preparing the aluminate water treatment agent can get rid of the problem that the traditional acid dissolution method for preparing the aluminate water treatment agent from the fly ash has low acid and alkali consumption, greatly saves the raw material cost, basically does not generate waste acid and waste lye in the process, and achieves the purpose of preparing waste by using waste.
Disclosure of Invention
Aiming at the technical defects that the technologies are difficult to industrialize due to the fact that acid and alkali are consumed in a large amount, cannot be recycled and high in raw material cost, the invention aims to solve the technical problems that: how to provide a method for preparing aluminate water treatment agent from fly ash industrially to the greatest extent by utilizing high added value of fly ash and saving acid and alkali consumption and reducing cost.
In order to solve the problems, the invention adopts the following technical scheme:
the method for preparing the aluminate water treatment agent from the fly ash by using the sodium bicarbonate and the carbide slag comprises the following steps:
(1) pretreatment of materials:
drying: drying the fly ash, sodium bicarbonate and carbide slag in an oven;
mixing and grinding: the mass fraction of the fly ash, the sodium bicarbonate and the carbide slag is 1: (0.4-1.2): (0.8-1.6) grinding and fully mixing;
(2) preparing aluminate water treatment agent:
roasting in a muffle furnace: transferring the uniformly mixed and ground material in the step (1) into a ceramic crucible, and roasting in a muffle furnace; setting the roasting temperature of a muffle furnace (700-; the obtained material is the aluminate water treatment agent.
Preferably, the drying conditions in the step (1) are as follows: the drying temperature of the oven is 60-100 ℃; the drying time is 1-5 h.
Preferably, the temperature rise rate in the muffle furnace in the step (2) is (5-10) DEG C/min.
A process for preparing aluminate water treating agent from powdered coal ash by use of sodium bicarbonate and calcium carbide dregs includes such steps as destroying and modifying the internal structure of powdered coal ash, extracting Al from powdered coal ash, and using Si element in powdered coal ash, and features that the sodium bicarbonate can destroy the mullite and quartz structure of powdered coal ash during high-temp calcining and the calcium carbide dregs can transform silicon dioxide into calcium silicate for producing cement. The method can get rid of the traditional acid dissolution method for preparing the aluminate water treatment agent from the fly ash. In the process of the invention, a large amount of alkali and acid are not needed, and the raw materials are two kinds of waste residues. The purpose of using waste to prepare waste is achieved, and the raw material cost is greatly saved.
The invention carries out the removal experiment on methylene blue: preparing (0.03-0.05) g/L methylene blue solution and (1-2) g/L Polyacrylamide (PAM) solution, and degrading the methylene blue by using the prepared aluminate water treatment agent; weighing (0.1-0.5) g of aluminate water treatment agent, adding into the prepared methylene blue solution, stirring for dissolving (0.5-1) h, and adding (1-3) mL of prepared PAM solution. After the precipitation is completed, the absorbance after and before degradation is measured by a spectrophotometer, and the removal rate is calculated.
Removal rate ═ (initial absorbance-absorbance after removal)/initial absorbance.
The invention can remove more than 90% of methylene blue.
In conclusion, the invention is optimized in that the aluminate water treatment agent is prepared from the fly ash, and the fly ash and the carbide slag which are used as raw materials are all waste residues of a power plant, so that the cost of the raw materials is greatly saved, and the aim of preparing waste by using waste is fulfilled. And the problem of pollution of solid waste of a thermal power plant is solved, products with high added values are extracted from the waste, and the economic benefit is greatly improved. Compared with the traditional alkaline method and acid method, the method does not produce red mud and desilication waste liquid, and contributes more to environmental protection.
In the invention, sodium bicarbonate and carbide slag are used for preparing the aluminate water treatment agent from the fly ash. The ratio of the materials has the greatest influence on the result.
In the invention, the roasting temperature is 700-1000 ℃, and the methylene blue removing efficiency is researched by changing the roasting temperature. The removal rate can reach more than 90 percent.
The method is characterized in that the heating roasting time is (1-5) h, and the roasting time is changed to research the removal efficiency of the methylene blue. The removal rate can reach more than 90 percent.
The method for preparing the aluminate water treatment agent from the fly ash greatly saves the raw material cost, has great economic benefit and does not pollute the environment.
Detailed Description
Example 1
Drying: respectively putting the fly ash, the sodium bicarbonate and the carbide slag into a clean beaker, putting the beaker into an oven, and setting the temperature and time of the oven; drying for 1h at 60 ℃. And drying the moisture in the materials, cooling to room temperature, and taking out to obtain the materials. Then 5g of fly ash and 8g of carbide slag are weighed, wherein the fly ash and the carbide slag are dried.
Mixing: 6g of the dried sodium bicarbonate in the step (1) is weighed, mixed with 5g of the fly ash and 8g of the carbide slag in the step (1), transferred to a mortar and fully ground. And then roasting the ground material at high temperature.
Thirdly, roasting: transferring the material to a ceramic crucible, covering the crucible with a cover, roasting in a muffle furnace, heating to 5 ℃/min at 700 ℃, roasting for 1h, naturally cooling to room temperature after roasting, and taking out a sample.
And step (iv) the material obtained after roasting is an aluminate water treatment agent which is used for removing methylene blue. The removal efficiency is 91 percent
Example 2
Drying: respectively putting the fly ash, the sodium bicarbonate and the carbide slag into a clean beaker, putting the beaker into an oven, and setting the temperature and time of the oven; drying for 2h at 80 ℃. And drying the moisture in the materials, cooling to room temperature, and taking out to obtain the materials. Then 5g of fly ash and 6g of carbide slag with dried moisture are weighed for later use.
Mixing: 3.5g of dried sodium bicarbonate in the step (i) is weighed, mixed with 5g of fly ash and 6g of carbide slag in the step (i), transferred into a mortar and fully ground. And then roasting the ground material at high temperature.
Thirdly, roasting: transferring the medium material to a ceramic crucible, covering the crucible with a cover, roasting in a muffle furnace, heating to 8 ℃/min, setting the temperature to 850 ℃, roasting for 3h, naturally cooling to room temperature after roasting, and taking out a sample.
And step (iv) the material obtained after roasting is an aluminate water treatment agent which is used for removing methylene blue. The removal efficiency is 92%.
Example 3
Drying: respectively putting the fly ash, the sodium bicarbonate and the carbide slag into a clean beaker, putting the beaker into an oven, and setting the temperature and time of the oven; drying for 5h at 100 ℃. And drying the moisture in the materials, cooling to room temperature, and taking out to obtain the materials. Then 5g of fly ash and 4g of carbide slag with dried moisture are weighed for later use.
Mixing: weighing 2g of dried sodium bicarbonate in the step I, mixing with 5g of fly ash and 4g of carbide slag in the step I, transferring into a mortar, and fully grinding. And then roasting the ground material at high temperature.
Thirdly, roasting: transferring the material to a ceramic crucible, covering the crucible with a cover, roasting in a muffle furnace, heating to 10 ℃/min at 1000 ℃, roasting for 5 hours, naturally cooling to room temperature after roasting, and taking out a sample.
And step (iv) the material obtained after roasting is an aluminate water treatment agent which is used for removing methylene blue. The removal efficiency is 95%.
While the methods and techniques of the present invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and/or modifications of the methods and techniques described herein may be made without departing from the spirit and scope of the invention. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and content of the invention.
Claims (3)
1. The method for preparing the aluminate water treatment agent from the fly ash by using the sodium bicarbonate and the carbide slag is characterized by comprising the following steps of:
(1) pretreatment of materials:
drying: drying the fly ash, sodium bicarbonate and carbide slag in an oven;
mixing and grinding: the mass fraction of the fly ash, the sodium bicarbonate and the carbide slag is 1: (0.4-1.2): (0.8-1.6) grinding and fully mixing;
(2) preparing aluminate water treatment agent:
roasting in a muffle furnace: transferring the uniformly mixed and ground material in the step (1) into a ceramic crucible, and roasting in a muffle furnace; setting the roasting temperature of a muffle furnace (700-; the obtained material is the aluminate water treatment agent.
2. The method of claim 1, wherein the oven drying temperature (60-100) degrees centigrade; the drying time is 1-5 h.
3. The method of claim 1, wherein the muffle is heated at a rate of (5-10) C/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828352.6A CN113562993A (en) | 2021-07-22 | 2021-07-22 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828352.6A CN113562993A (en) | 2021-07-22 | 2021-07-22 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113562993A true CN113562993A (en) | 2021-10-29 |
Family
ID=78166095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110828352.6A Pending CN113562993A (en) | 2021-07-22 | 2021-07-22 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113562993A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570109A (en) * | 2017-10-20 | 2018-01-12 | 新疆大学 | A kind of method that carbide slag treated coal ash realizes its recycling |
| CN107930576A (en) * | 2017-11-27 | 2018-04-20 | 吉林大学 | A kind of preparation method of fly ash micro-sphere porous material and obtained porous material |
| CN111592001A (en) * | 2020-05-31 | 2020-08-28 | 佛山经纬纳科环境科技有限公司 | Method for preparing layered double hydroxide and white carbon black from fly ash |
-
2021
- 2021-07-22 CN CN202110828352.6A patent/CN113562993A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570109A (en) * | 2017-10-20 | 2018-01-12 | 新疆大学 | A kind of method that carbide slag treated coal ash realizes its recycling |
| CN107930576A (en) * | 2017-11-27 | 2018-04-20 | 吉林大学 | A kind of preparation method of fly ash micro-sphere porous material and obtained porous material |
| CN111592001A (en) * | 2020-05-31 | 2020-08-28 | 佛山经纬纳科环境科技有限公司 | Method for preparing layered double hydroxide and white carbon black from fly ash |
Non-Patent Citations (1)
| Title |
|---|
| 郑峰伟: "《粉煤灰中铝铁浸出过程及动力学研究》", 《中国优秀硕士学位论文电子期刊 工程科技Ⅰ辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104386720B (en) | Method for acid-alkali combined extraction of alumina from high-silicon aluminum-containing mineral raw material | |
| CN102515279B (en) | Comprehensive extraction method of ferro-silico-aluminum in gangue | |
| CN103172095B (en) | Method for producing ultrawhite aluminum hydroxide and by-products from high-alumina fly ash by using high-temperature alkaline leaching | |
| CN109516484B (en) | Method for producing alumina by sintering carbide slurry fly ash and coal gangue | |
| WO2013040862A1 (en) | Method for producing aluminium oxide by processing fly ash with ammonia process | |
| CN102351226B (en) | Method for producing aluminum oxide from fly ash | |
| WO2012151767A1 (en) | Method for preparing alumina from high alumina fly ash and co-producing active calcium silicate | |
| WO2008119212A1 (en) | A method of extracting silica at first and then extracting alumina from fly ash | |
| CN104445313B (en) | Method for extracting aluminum oxide from fly ash by acid-base combination | |
| CN108866678B (en) | Method for preparing continuous alumina fiber from coal gangue | |
| CN106477609B (en) | Method for producing alumina by coal ash sulfuric acid curing | |
| CN101767807B (en) | Method for extracting high-purity aluminum oxide and silica gel from beauxite | |
| CN109384254B (en) | Method for preparing crystalline aluminum chloride and white carbon black from fly ash or coal gangue | |
| CN104787788B (en) | Method for producing alumina from high-alumina fly ash | |
| CN103130254A (en) | Method for producing aluminum oxide by using alkaline method | |
| CN104817099A (en) | Improved method for extracting alkali metal compound from solid fluorine reconstruction lepidolite | |
| CN109835932A (en) | The method that two step acid extractings extract aluminium oxide in high aluminum mineral | |
| CN103952557A (en) | Method for secondary acid leaching of alumina in coal ash residues | |
| CN103936045B (en) | A kind of method extracting aluminum oxide from flyash | |
| CN101306928A (en) | Pre- desiliconizing method from fly ash or slag | |
| CN104743565A (en) | Method for preparing zeolite molecular sieve through coal ash | |
| CN102659155A (en) | Low-temperature acid soluble method for leaching alumina from fly ash | |
| CN113562993A (en) | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag | |
| CN107381585B (en) | Method for extracting aluminum silicon by pyrolyzing fly ash ammonium sulfate roasted clinker | |
| CN106698490B (en) | A kind of method that aluminium predecessor is prepared from flyash and its prepares nano aluminium oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211029 |
|
| RJ01 | Rejection of invention patent application after publication |