CN111559899A - Recycled material terrace brick and preparation method thereof - Google Patents
Recycled material terrace brick and preparation method thereof Download PDFInfo
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- CN111559899A CN111559899A CN202010356648.8A CN202010356648A CN111559899A CN 111559899 A CN111559899 A CN 111559899A CN 202010356648 A CN202010356648 A CN 202010356648A CN 111559899 A CN111559899 A CN 111559899A
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- red mud
- petroleum coke
- slag
- brick
- desulfurization ash
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- 239000000463 material Substances 0.000 title claims abstract description 56
- 239000011449 brick Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 56
- 239000002006 petroleum coke Substances 0.000 claims abstract description 45
- 239000002994 raw material Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 25
- 230000023556 desulfurization Effects 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 10
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 9
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 9
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000004131 Bayer process Methods 0.000 claims description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 229910001385 heavy metal Inorganic materials 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 5
- 229910001570 bauxite Inorganic materials 0.000 claims description 5
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 5
- 238000002386 leaching Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 7
- 239000002910 solid waste Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000011454 mudbrick Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010257 thawing Methods 0.000 description 4
- 239000005997 Calcium carbide Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 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 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003541 multi-stage reaction Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a recycled material terrace brick and a preparation method thereof, wherein the raw materials comprise a cementing material and an aggregate, and the recycled material terrace brick is characterized in that: the cementing material accounts for 25-50% of the total mass of the raw materials, the aggregate accounts for 50-75% of the total mass of the raw materials, and the cementing material comprises the following components: red mud, petroleum coke desulfurization ash, carbide slag, slag powder, water glass and sodium sulfate; the aggregate is river sand. The preparation method comprises the following steps: weighing the raw materials according to the proportion for later use; drying and grinding the red mud, the petroleum coke desulfurization ash and the carbide slag, uniformly mixing the red mud, the petroleum coke desulfurization ash and the carbide slag with the slag powder, adding river sand to obtain a uniformly mixed mixture, putting the uniformly mixed mixture into a mortar stirring container, adding a proper amount of water, stirring, pouring and forming, placing the mixture indoors for 20-30 hours, removing a mold, and then curing for 25-30 days. The waste material resources are utilized, so that the environmental pollution can be reduced, and the manufacturing cost of the terrace brick is reduced; the preparation method is quick and simple, and is suitable for large-scale industrial production.
Description
Technical Field
The invention belongs to the fields of civil engineering, solid waste resource recycling and building materials, and particularly relates to a recycled material terrace brick and a preparation method thereof.
Background
In recent years, the yield of the aluminum oxide in China exceeds 50% of the global yield, the capacity of the aluminum oxide in China reaches 7071 million tons by 3 months in 2017, and the huge capacity simultaneously promotes the development of the aluminum industry in China. Currently, the mode of producing alumina is mainly Bayer process, the yield of the alumina accounts for about 90 percent of the total yield of the alumina worldwide, and the main advantage of the method is that the energy consumption can be effectively reduced. However, in the process of producing alumina by the bayer process, raw materials such as caustic soda, lime and the like are usually added, and other alkali-insoluble substances are filtered out while alumina is dissolved out, and the solid waste slag generated in the production process is the red mud. Because of the influence of factors such as alumina production process, raw materials and the like, Bayer process red mud has extremely fine particles, high alkalinity and easy generation of dust pollution, and alkali or other heavy metal substances separated out in the stacking process can also permeate underground and cause soil alkalization or pollution of underground water sources.
According to statistics, the discharge amount of red mud in China per year exceeds 7000 million tons, and the accumulated stock amount exceeds 3.5 million tons. Due to the fact that supervision is not in place, enterprises are difficult to carry out harmless treatment when stacking red mud, and serious environmental pollution is caused to the periphery of a yard and nearby areas; along with the development of urbanization construction, land resources are deficient, environmental problems become the first problem to be solved in social development, and for the alumina industry, the sustainable development can be better realized by solving the problem of comprehensive recycling of red mud. At present, the comprehensive utilization of red mud in China is to extract useful components in the red mud, such as valuable metals and the like; and secondly, the organic silicon is integrally utilized as a raw material, such as an environment repairing material or a building material. The process for recovering valuable metal components is complex, the cost is high, the process for using the material for environmental remediation is simple, the cost is relatively low, and secondary pollution can be generated in application. The two application modes reduce the discharge amount of the red mud to a certain extent, but the consumption of the red mud is still limited, and secondary pollution cannot be avoided in the application process.
Meanwhile, the contents of sulfur, nitrogen and metal elements in crude oil imported from the middle east, heavy crude oil and poor crude oil mainly by large-scale oil refineries in coastal areas of our province are increased continuously, so that petroleum coke can only be used as fuel. The current common high-sulfur petroleum coke treatment technology is to burn by a circulating fluidized bed boiler, and to generate CaSO by adding CaO decomposed by limestone at high temperature and sulfur burnt by petroleum coke4Thus achieving the aim of desulfurizing the petroleum coke, and the mixture of the desulfurized gypsum and other combustion products forms the desulfurization ash of the petroleum coke. Taking an oil refinery in a certain place as an example, the annual discharge amount of petroleum coke desulfurized gypsum residue is more than 50 million tons, at present, the petroleum coke desulfurized gypsum residue can only be stacked in the open air, and a proper way for large-scale treatment is not available, so that serious environmental pollution is caused. The desulfurized ash residue of petroleum coke is the ash residue formed by the water content in the fuel and the water content formed after the hydrogen element in the fuel is burnt together in a gaseous state on the heating surface of a boiler. The mineral impurities become ash, and are essentially present in the form of metallic and non-metallic oxides, such as oxides of silicon, aluminum, iron, calcium, potassium, sodium, nickel, magnesium, and the like. The resource utilization technology of the petroleum coke slag is always a hotspot and a difficult point of domestic and overseas research, although the achievement is more, the actual popularization and application are less, and the resource utilization level is to be improved urgently.
The method is difficult to realize the large utilization of the Bayer process red mud no matter the valuable metals are recycled or the method is used for environmental remediation and the like, and becomes a great difficulty in the comprehensive utilization of the red mud resource.
The method is to prepare the activity excitant of the Bayer process red mud by using the solid waste desulfurized petroleum coke residue in the oil refining industry as the main raw material and to prepare the floor brick by doping wastes such as carbide slag and the like. The thought of treating wastes with wastes is exerted, the cost is reduced, and the activation treatment is carried out on the Bayer process red mud by utilizing large-dosage petroleum coke desulfurization ash and other auxiliary materials, thereby achieving the purpose of dual resource utilization of alumina waste residues and solid wastes in the oil refining industry. This is a technical problem which is urgently to be solved at present.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a recycled material terrace brick and a preparation method thereof, which achieve the aim of dual resource utilization of aluminum oxide waste residues and oil refining industry solid wastes, can effectively reduce environmental pollution and reduce the manufacturing cost of the terrace brick, have easily available raw materials, are quick and simple in preparation method, and are suitable for large-scale industrial production.
In order to solve the above problems, the object of the present invention is achieved by the following technical solutions:
the recycled material terrace brick is characterized in that the raw materials of the recycled material terrace brick comprise a cementing material and an aggregate, the cementing material accounts for 25% -50% of the total mass of the raw materials, the aggregate accounts for 50% -75% of the total mass of the raw materials, and the cementing material comprises the following components in percentage by mass: 30-70% of red mud, 20-60% of petroleum coke desulfurization ash, 0-35% of carbide slag, 7.5-30% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate; the aggregate is river sand.
The improvement of the technical scheme is as follows: the cementing material comprises the following components in percentage by mass: 45-70% of red mud, 20-55% of petroleum coke desulfurization ash, 0-30% of carbide slag, 7.5-25% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate.
The technical scheme is further improved as follows: the dosage of the external water is 10-15% of the mass of the cementing material, and the external water is not counted in the mass percentage of the raw material of the regenerated material terrace brick.
The technical scheme is further improved as follows: the red mud is Bayer process red mud which is muddy residue discharged by leaching alumina in bauxite by using a Bayer process; the petroleum coke desulfurization ash is waste residue generated by burning heavy metal-containing petroleum coke in a boiler and mixing with lime powder; the carbide slag is a solid deposit generated after acetylene gas is hydrolyzed from carbide.
The invention also provides a preparation method of the recycled material terrace brick, which is characterized by comprising the following steps:
(1) weighing red mud, petroleum coke desulfurization ash, carbide slag, slag and river sand according to the raw material mixing ratio for later use;
(2) drying and grinding the red mud, the petroleum coke desulfurization ash, the carbide slag and the slag, mixing the materials in proportion, and adding river sand to obtain a uniformly mixed mixture;
(3) and putting the mixture into a mortar stirring container, adding a proper amount of water, stirring, pouring and forming after fully stirring, placing the mixture indoors for 20-30 hours, removing the mold, and then curing the mixture in a natural environment for 25-30 days to obtain the red mud baking-free tailing brick.
The improvement of the technical scheme is as follows: the cementing material accounts for 25-50% of the total mass of the raw materials, the aggregate accounts for 50-75% of the total mass of the raw materials, and the cementing material comprises the following components in percentage by mass: 30-70% of red mud, 20-60% of petroleum coke desulfurization ash, 0-35% of carbide slag, 7.5-30% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate.
The technical scheme is further improved as follows: the cementing material comprises the following components in percentage by mass: 45-70% of red mud, 20-55% of petroleum coke desulfurization ash, 0-30% of carbide slag, 7.5-25% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate.
The technical scheme is further improved as follows: the dosage of the external water is 10-15% of the mass of the cementing material, and the external water is not counted in the mass percentage of the raw material of the regenerated material terrace brick.
The technical scheme is further improved as follows: the red mud is Bayer process red mud which is muddy residue discharged by leaching alumina in bauxite by using a Bayer process; the petroleum coke desulfurization ash is waste residue generated by burning heavy metal-containing petroleum coke in a boiler and mixing with lime powder; the carbide slag is a solid deposit generated after acetylene gas is hydrolyzed from carbide.
Compared with the prior art, the invention has the following advantages and positive effects:
the Bayer process red mud activity excitant is prepared by using oil refining waste ash as a main raw material, and can be uniformly mixed with Bayer process red mud in a certain proportion to obtain better strength. The invention can achieve the purpose of dual resource utilization of the alumina waste residue and the oil refining industry solid waste, can reduce the pollution degree to the surrounding environment and the resource waste, and has great economic value, social value and environmental protection value. The preparation method can also reduce the manufacturing cost of the floor brick, has easily obtained raw materials, is quick and simple, and is suitable for large-scale industrial production.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The invention relates to a specific implementation mode of a recycled material terrace brick, wherein the recycled material terrace brick comprises raw materials of a cementing material and an aggregate, the cementing material accounts for 25-50% of the total mass of the raw materials, the aggregate accounts for 50-75% of the total mass of the raw materials, and the cementing material comprises the following components in percentage by mass: 30-70% of red mud, 20-60% of petroleum coke desulfurization ash, 0-35% of carbide slag, 7.5-30% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate; the aggregate is river sand.
Preferably, the mass percentages of the components in the cementing material are as follows: 45-70% of red mud, 20-55% of petroleum coke desulfurization ash, 0-30% of carbide slag, 7.5-25% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate.
Furthermore, the using amount of the external water is 10-15% of the mass of the cementing material, and the external water is not counted in the mass percentage of the raw material of the regenerated material terrace brick.
Specifically, the method comprises the following steps: the red mud is Bayer process red mud which is muddy residue discharged by leaching alumina in bauxite by using a Bayer process; the petroleum coke desulfurization ash is waste residue generated by burning heavy metal-containing petroleum coke in a boiler and mixing with lime powder; the carbide slag is a solid deposit generated after acetylene gas is hydrolyzed from carbide.
The invention also provides a specific implementation mode of the preparation method of the recycled material terrace brick, which comprises the following steps:
(1) weighing red mud, petroleum coke desulfurization ash, carbide slag, slag and river sand according to the raw material mixing ratio for later use;
(2) drying and grinding the red mud, the petroleum coke desulfurization ash, the carbide slag and the slag, mixing the materials in proportion, and adding river sand to obtain a uniformly mixed mixture;
(3) and putting the mixture into a mortar stirring container, adding a proper amount of water, stirring, pouring and forming after fully stirring, placing the mixture indoors for 20-30 hours, removing the mold, and then curing the mixture in a natural environment for 25-30 days to obtain the red mud baking-free tailing brick.
The following are specific examples of the recycled material terrace brick of the invention:
the tailing brick material is selected from Bayer process red mud, petroleum coke slag, carbide slag, slag and river sand. Two forming modes, namely static pouring forming and pressing forming, are adopted in the test. The test detection method refers to (GB/T4111-2013) concrete block and brick test method to detect the mechanical property, the drying shrinkage, the softening coefficient and the frost resistance. Each performance meets each index requirement specified in non-sintered refuse tailing bricks (JC/T422-2007).
Example 1:
the red mud brick is prepared with Bayer process red mud 12.25 wt%, petroleum coke slag 3.5 wt%, calcium carbide slag 1.75 wt%, slag 7.5 wt%, river sand 75 wt%, added polycarboxylic acid water reducing agent 0.2 wt% and water 12.5 wt% and through mixing, grinding, mixing in certain proportion, adding river sand, stirring in mortar stirring pot with water, casting to form, demolding after 1 day, and curing in natural environment to 28 days to obtain the red mud brick as the burning-free tailing brick3The pavement brick has the flexural strength of 6.6MPa and the compressive strength of 21.8MPa after 28 days, the average water absorption of 8.4 percent, the drying shrinkage of 0.512mm/m and the softening coefficient of 1.07, and the quality after 25 times of slow freezing and thawing cyclesThe loss rate of the amount was 0, and the loss rate of the strength was 9.05%.
Example 2:
the red mud brick is prepared with Bayer process red mud 24.5 wt%, petroleum coke slag 7 wt%, calcium carbide slag 3.5 wt%, slag 15 wt%, river sand 50 wt%, water 0.5 wt%, and casting 40 × 100 × 200mm in weight proportion3The 28d flexural strength of the pavement brick is 10.3MPa, the compressive strength is 43.0MPa, the average water absorption is 2.6%, the drying shrinkage is 0.465mm/m, the softening coefficient is 1.0, the mass loss rate after 25 times of slow freezing and thawing cycles is 0, and the strength loss rate is 1.88%.
Example 3:
the red mud brick is prepared with Bayer process red mud 24.5 wt%, petroleum coke slag 10.5 wt%, slag 15 wt%, river sand 50 wt%, added polycarboxylic acid water reducing agent 0.5 wt% and water 15 wt%, and through mixing, adding river sand and water in certain proportion, and curing in natural environment to 28 days3The 28d flexural strength of the pavement brick is 8.9MPa, the compressive strength is 36.9MPa, the average water absorption is 2.5 percent, the drying shrinkage is 0.467mm/m, the softening coefficient is 1.03, the mass loss rate after 25 times of slow freezing and thawing cycles is 0, and the strength loss rate is 1.12 percent.
Example 4:
drying and grinding the Bayer process red mud, the petroleum coke residue, the carbide slag and the slag, then mixing the materials in proportion, and adding part of river sand. Placing the mixture into a mortar stirring pot, adding appropriate amount of water, stirring, fully stirring, press-forming with a pressure tester 80KN, placing indoors for 1d, removing the mold, and curing in natural environment to 28d to obtain the final productThe red mud baking-free tailing brick is prepared with Bayer process red mud 12.25 wt%, petroleum coke desulfurizing cinder 3.5 wt%, calcium carbide slag 1.75 wt%, slag 7.5 wt%, river sand 75 wt% and 12.5 wt% water, and through pressing into 55 × 100-100 × 200mm size3The 28d flexural strength of the pavement brick is 8.4MPa, the compressive strength is 29.6MPa, the average water absorption is 11%, the drying shrinkage is 0.10mm/m, the softening coefficient is 0.95, the mass loss rate after 25 times of slow freezing and thawing cycles is 0.6%, and the strength loss rate is 7.92%.
According to the invention, the experiment is carried out according to the formula, the exciting agent is doped into the red mud, the die is removed after the maintenance is carried out for 24 hours, and the test block is cemented and molded, can be completely demoulded, has certain strength up to 25MPa, and can be directly used for hardening floors and floor tiles. In the test block, the activity of the red mud powder is further improved by the petroleum coke desulfurization ash, and active ingredients in auxiliary materials such as high belite cement, water glass and the like are subjected to composite reaction with the red mud to generate a substance with a gelling property, so that the compactness and the strength of the material are improved.
The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention as set forth in the appended claims.
Claims (6)
1. The recycled material terrace brick is characterized in that the raw materials of the recycled material terrace brick comprise a cementing material and an aggregate, the cementing material accounts for 25% -50% of the total mass of the raw materials, the aggregate accounts for 50% -75% of the total mass of the raw materials, and the cementing material comprises the following components in percentage by mass: 30-70% of red mud, 20-60% of petroleum coke desulfurization ash, 0-35% of carbide slag, 7.5-30% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate; the aggregate is river sand.
2. The recycled material floor tile of claim 1, wherein the cementitious material comprises the following components in percentage by mass: 45-70% of red mud, 20-55% of petroleum coke desulfurization ash, 0-30% of carbide slag, 7.5-25% of slag powder, 1-2% of water glass and 1-2% of sodium sulfate.
3. The recycled material terrace brick according to claim 1 or 2, wherein the amount of externally doped water is 10-15% of the mass of the cementing material, and the externally doped water is not counted in the mass percentage of the recycled material terrace brick raw material.
4. The recycled material floor tile according to claim 1 or 2, wherein the red mud is bayer process red mud, which is a sludge-like residue discharged from alumina leaching in bauxite by using a bayer process; the petroleum coke desulfurization ash is waste residue generated by burning heavy metal-containing petroleum coke in a boiler and mixing with lime powder; the carbide slag is a solid deposit generated after acetylene gas is hydrolyzed from carbide.
5. The recycled material floor tile of claim 3, wherein the red mud is Bayer process red mud, wherein the Bayer process red mud is a sludge-like residue discharged from the leaching of alumina from bauxite by using a Bayer process; the petroleum coke desulfurization ash is waste residue generated by burning heavy metal-containing petroleum coke in a boiler and mixing with lime powder; the carbide slag is a solid deposit generated after acetylene gas is hydrolyzed from carbide.
6. The preparation method of the recycled material floor tile according to any one of claims 1 to 5, characterized in that the preparation method comprises the following steps:
(1) weighing red mud, petroleum coke desulfurization ash, carbide slag, slag and river sand according to the raw material mixing ratio for later use;
(2) drying and grinding the red mud, the petroleum coke desulfurization ash, the carbide slag and the slag, mixing the materials in proportion, and adding river sand to obtain a uniformly mixed mixture;
(3) and putting the mixture into a mortar stirring container, adding a proper amount of water, stirring, pouring and forming after fully stirring, placing the mixture indoors for 20-30 hours, removing the mold, and then curing the mixture in a natural environment for 25-30 days to obtain the red mud baking-free tailing brick.
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| PCT/CN2021/090860 WO2021219058A1 (en) | 2020-04-29 | 2021-04-29 | Recycled material floor tile and preparation method therefor |
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| CN113582636A (en) * | 2021-07-30 | 2021-11-02 | 山东大学 | Red mud-based water bone stabilizing material and preparation method and application thereof |
| WO2021219058A1 (en) * | 2020-04-29 | 2021-11-04 | 青岛理工大学 | Recycled material floor tile and preparation method therefor |
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| CN114523559B (en) * | 2021-12-27 | 2024-02-13 | 昆明云能化工有限公司 | Comprehensive utilization system of carbide slag |
| CN114644476A (en) * | 2022-03-18 | 2022-06-21 | 青岛理工大学 | Concrete aggregate with core-shell structure and preparation method and application thereof |
| CN114620960B (en) * | 2022-04-26 | 2023-07-18 | 洛阳君江建材科技有限公司 | Method for preparing building material from red mud |
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Application publication date: 20200821 |