CN115159938A - Method for preparing aerated brick by combining red mud and sugar-making filter mud - Google Patents
Method for preparing aerated brick by combining red mud and sugar-making filter mud Download PDFInfo
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- CN115159938A CN115159938A CN202210359644.4A CN202210359644A CN115159938A CN 115159938 A CN115159938 A CN 115159938A CN 202210359644 A CN202210359644 A CN 202210359644A CN 115159938 A CN115159938 A CN 115159938A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000011449 brick Substances 0.000 title claims abstract description 44
- 239000002994 raw material Substances 0.000 claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 17
- 230000008719 thickening Effects 0.000 claims abstract description 5
- 239000004615 ingredient Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000011499 joint compound Substances 0.000 claims description 127
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 11
- 239000002551 biofuel Substances 0.000 claims description 10
- 238000001354 calcination Methods 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 7
- 239000010440 gypsum Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 239000010802 sludge Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 239000004567 concrete Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000005352 clarification Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 5
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 5
- 239000011268 mixed slurry Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 229910021532 Calcite Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 3
- 229930006000 Sucrose Natural products 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 229960004793 sucrose Drugs 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000003911 water pollution Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 235000007201 Saccharum officinarum Nutrition 0.000 description 2
- 240000000111 Saccharum officinarum Species 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000008395 clarifying agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 229910001679 gibbsite Inorganic materials 0.000 description 2
- 229910052598 goethite Inorganic materials 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011022 opal Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910021646 siderite Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000004813 Moessbauer spectroscopy Methods 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 241001625808 Trona Species 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012802 nanoclay Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002354 radioactive wastewater Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- 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
- C04B28/14—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 calcium sulfate 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0409—Waste from the purification of bauxite, e.g. red mud
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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
- C04B2111/40—Porous or lightweight 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The application relates to a method for preparing aerated bricks by combining red mud and sugar-making filter mud, which comprises the following steps: s10, preparing raw materials required by production of aerated bricks; s20, blending the raw materials in the step S10; s30, pouring the ingredients in the step S30 into a pouring machine to prepare slurry, and pouring the slurry into a mold; s40, expanding and thickening the poured slurry. The technical scheme of this application has solved the problem of red mud and sugar manufacturing filter mud polluted environment among the prior art effectively.
Description
Technical Field
The application relates to the technical field of aerated bricks, in particular to a method for preparing aerated bricks by combining red mud and sugar making filter mud.
Background
The red mud is industrial solid waste discharged when aluminum oxide is extracted in the aluminum industry, and is called red mud because of large iron oxide content and similar appearance to red mud. Due to different ore grades, production methods and technical levels, about 1.0-1.8 tons of red mud is discharged when 1 ton of alumina is produced. With the increasing stock quantity of the red mud and the increasing pollution to the environment, the resource utilization of the red mud to the maximum extent is reluctant.
The red mud is an insoluble residue which can be divided into sintering process red mud, bayer process red mud and combination process red mud, and the main component is SiO 2 、Al 2 O 3 、CaO、Fe 2 O 3 And the like. The red mud mineral composition is complex, and is analyzed by adopting a plurality of methods, and the method mainly comprises the following steps: the red mud is measured by seven methods, such as a polarizing microscope, a scanning microscope, a differential thermal analyzer, X diffraction, chemical total analysis, infrared absorption spectrum, mossbauer spectroscopy and the like, and the result is that the main minerals of the red mud are aragonite and calcite, the content of the aragonite and the calcite is 60% -65%, the red mud is opal, gibbsite and goethite, and the red mud is titanium ore, siderite, trona, water glass, sodium aluminate and caustic soda ash with the minimum content. The red mud has complex mineral components and does not conform to mineral combinations of natural soil. Among the ores, aragonite, calcite and siderite are not only skeletons, but also have a certain cementing function; and goethite, gibbsite, opal and water glass play a role in cementing and filling. The particle diameter of the red mud is 0.088-0.25 mm, the specific gravity is 2.7-2.9 g, the volume weight is 0.8-1.0 g/cm < 3 >, and the melting point is 1200-1250 ℃. The pH value of the red mud is very high, wherein: the pH value of the leaching solution is 12.1 to 13.0, and the fluoride content is 11.5 mg.L -1 ～26.7mg·L -1 (ii) a The pH value of the red mud is 10.29 to 11.83, and the fluoride content is 4.89 mg.L -1 ～ 8.6mg·L -1 。
Since the chemical alkali combined with the red mud is difficult to remove and has large content, and the chemical alkali also contains fluorine, aluminum and other various impurities, the harmless utilization of the red mud is difficult to carry out. Experts in various countries around the world carry out a great deal of scientific research on the comprehensive utilization of the red mud, but the research progress is not great. Therefore, the treatment and comprehensive utilization of the red mud waste residue become a great worldwide problem. The sales of the red mud mainly adopts a method of seabed or land stacking disposal, but with the development of the aluminum industry, the amount of the red mud discharged during the production of alumina is increasing day by day, and a series of problems caused by stacking disposal follow the red mud, thereby causing serious environmental problems.
Red mud is transported to a yard in most alumina factories, is piled up by a damming wet method, and part of alkali liquor is recycled by natural sedimentation and separation. The other method is to dry and dehydrate the red mud and then pile the red mud, and part of enterprises adopt dry piling, so that the treatment cost is increased and the land still needs to be occupied although the piling amount is reduced and the piling height can be increased, and meanwhile, the rainwater in the south is sufficient, so that the land alkalization and the water pollution are easily caused.
In addition to occupying a large amount of land in the stacking process of the red mud, chemical components in the red mud are easy to cause land alkalization and underground water pollution when entering the land, and people can certainly influence the body health after taking the substances for a long time. The main pollutants contained in the red mud are alkali, fluoride, sodium, aluminum and the like, and the content of the main pollutants is higher than the discharge standard (the standard for controlling solid waste pollution in nonferrous metal industry) regulated by China.
Because the red mud contains a large amount of strong alkaline chemical substances, the extremely high pH value determines the strong corrosivity of the red mud on organisms, metals and siliceous materials. The sewage with high alkalinity permeates underground or into surface water, so that the pH value of the water body is increased to exceed the corresponding national specified standard, and the toxicity of compounds in the water is often influenced by the pH value, so that more serious water pollution is caused. The increasing amount of red mud in the stockpiling field causes more and more serious environmental pollution, and the comprehensive utilization of the red mud becomes a difficult problem to be solved urgently in the aluminum industry.
Because the red mud contains SiO 2 、Al 2 O 3 、CaO、Fe 2 O 3 And the sub-clay property of the nano-clay can be used as raw materials of cement, bricks, ceramics, concrete, pavement materials, trace glass, plastics and the like. The red mud has good adsorption performance, and after being treated by water washing, acid washing, roasting, activating and the like, an inorganic adsorption material with good performance can be prepared, and can be used for adsorbing Cd in water 2+ 、Hg 2 + 、Pb 2+ 、Ni 2+ 、Cu 2+ The heavy metal ions can also be used for decoloring organic wastewater, removing COD (chemical oxygen demand) and treating radioactive wastewater. The red mud contains a large amount of aluminum, iron and silicate, so that the red mud can be used for preparing polyaluminium chloride and iron flocculating agents and novel polysilicate inorganic polymeric flocculating agents. The red mud contains a large amount of sulfur-fixing components such as Fe 2 O 3 、 Al 2 O 3 CaO, mgO and Na 2 O, etc. with large specific surface area, can be used for replacing lime milk wet desulphurization. The red mud contains a large amount of calcium, silicon, potassium and phosphorus elements, and also contains trace elements and certain alkalinity which are necessary for dozens of crops. The red mud is dehydrated, dried, activated and ground at high temperature to prepare the silicon-calcium agricultural fertilizer. The fertilizer has a certain regulating effect on acid soil and can be used as a base fertilizer to improve the soil; it has certain effect of increasing production of land which is lack of calcium, silicon, potassium, phosphorus and corresponding trace elements.
The cane juice extracted from sugar cane contains a large amount of cane sugar, and also contains various inorganic and organic non-sugar impurities. The presence of these non-sugar components affects the extraction of sucrose and the quality of the product. Therefore, in the cane sugar factory, for the cane juice of the pressed cane, clarification treatment is required, namely lime milk and the like are added into the cane juice to be used as a clarifying agent, some non-sugar parts are precipitated and separated to obtain clear juice which is sent to be steamed and cooked to prepare a sugar product, and the sediment obtained after cane juice clarification is dehydrated by a filter to be discharged as filter mud.
The composition of the sugar mill sludge varies depending on the clarification method. Because, in order to improve the clarification effect, the clarification operation is added with lime milk and CO is also introduced 2 Or SO 2 Therefore, depending on the clarification usedDifferent clarifying agents are used, and clarifying methods are respectively called a lime method, a carbonic acid method, a sub-acid method and the like. The filter mud discharged by various methods contains a large amount of water, fiber, sugar, waxy protein organic acid, iron, potassium, phosphorus, calcium compounds and the like.
Although there are many ways for using and treating the filter mud of sugar refinery according to different compositions, so far, the filter mud is mainly piled or poured into the sea, and the amount of the filter mud for producing sugar by using this useful resource is very small, and because the filter mud produced by carbonic acid method is large, 5 tons of filter mud can be produced per 100 tons of sugar cane treated, and the annual filter mud produced by medium or large sugar refinery can reach 5-10 ten thousand tons. The stacked filter mud occupies a large amount of soil and land, and is easy to mildew and smell due to the fact that the filter mud contains various organic matters and saccharides, flies are bred, air is polluted, sanitation is affected, even a river channel is silted up, and a water body is polluted.
In conclusion, the red mud and the filter mud of the sugar refinery are treated as wastes to pollute the environment.
Disclosure of Invention
The application provides a method for preparing aerated bricks by combining red mud and sugar making filter mud, which is used for solving the problem that the red mud and the sugar making filter mud in the prior art pollute the environment.
In order to solve the problems, the application provides a method for preparing an aerated brick by combining red mud and sugar making filter mud, which comprises the following steps: s10, preparing raw materials required by production of aerated bricks; s20, blending the raw materials in the step S10; s30, pouring the ingredients in the step S30 into a pouring machine to prepare slurry, and pouring the slurry into a mold; s40, expanding and thickening the poured slurry.
Further, step S30 includes adding an aluminum powder suspension to the slurry before casting.
Further, in step S30, the stirring speed is between 70r/min and 80r/min, the temperature is between 30 ℃ and 40 ℃, and the aluminum powder suspension is added 0.5min to 1min before pouring.
Further, in step S10, the raw materials include dried red mud, dried sugar-making filter mud, cement, gypsum, aluminum powder, triethanolamine, and water.
Furthermore, the moisture of the dried red mud and the dried sugar making filter mud is less than 10%, and the particle sizes of the dried red mud and the dried sugar making filter mud are more than or equal to 200 meshes.
Further, the red mud in the step S10 comprises the following components in percentage by mass: siO 2 2 30 to 45 percent of CaO, 30 to 50 percent of Al 2 O 3 Between 5% and 7%, fe 2 O 3 7-10%, naOH 4-6%, and Na 2 O is between 2 and 4 percent, and the integral pH value of the red mud is between 9 and 10.
Further, in step S10, the sugar refining sludge is a sludge obtained by carbonating sugar refining, and the calcined sludge contains the following components in percentage by mass: caO is between 60 and 70 percent, P 2 O 5 Between 5% and 10%, K 2 O is between 5 and 10 percent, mgO is between 2 and 3 percent, and SiO is 2 Between 10% and 20%.
Further, the calcination is carried out by means of a biofuel shaft kiln comprising: the kiln body comprises a feed inlet, a discharge outlet and an air inlet, wherein the feed inlet is arranged at the top of the kiln body, and the discharge outlet and the air inlet are both arranged at the bottom of the kiln body; the slow descending assembly is arranged inside the kiln body and used for burning the sludge with the biofuel introduced from the feed inlet and slowing down the descending of the sludge.
Further, the formula of the raw materials comprises the following components in percentage by mass: 10 percent of cement, 20 to 40 percent of sugar-making filter mud, 50 to 60 percent of red mud, 3 to 5 percent of gypsum, 6 to 8 percent of aluminum powder, 0 to 5 percent of triethanolamine and 0.6 to 0.65 percent of water.
Furthermore, the pouring temperature is between 30 ℃ and 40 ℃, and the raw materials can also comprise fly ash.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the technical scheme, the red mud and the sugar making filter mud are combined to prepare the aerated brick, so that the red mud and the sugar making filter mud can be reused, the environment pollution caused by the direct discharge of the red mud and the sugar making filter mud into the environment is avoided, and the slurry prepared from the red mud and the sugar making filter mud is thickened in an expansion mode, so that the aerated brick prepared from the red mud and the sugar making filter mud can be thickened in an expansion mode to reduce the quality of common bricks. The application effectively solves the problem of environmental pollution caused by directly discharging the red mud and the sugar-making filter mud in the prior art into the environment.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Figure 1 shows a schematic process flow diagram of an aerated brick according to an embodiment of the present application;
FIG. 2 shows a schematic structural view of a biofuel shaft kiln in the process of air-entrained bricks of FIG. 1;
FIG. 3 shows a schematic top view of the biofuel shaft kiln of FIG. 2;
fig. 4 shows a schematic view of the internal structure of the body of the biofuel shaft kiln of fig. 2.
Wherein the figures include the following reference numerals:
10. a kiln body; 11. a discharge port; 12. an air inlet; 20. a slow descent component; 21. a first slowly descending arc-shaped ring; 22. a second slowly descending arc-shaped ring; 30. a feeding structure; 40. a winch; 50. a skip car; 60. a bell-cap structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
As shown in fig. 1 to 4, the method for preparing an aerated brick by combining red mud and sugar manufacturing filter mud of the embodiment comprises the following steps: s10, preparing raw materials required by the production of the aerated brick. S20, the raw materials in the step S10 are proportioned. S30, adding the ingredients in the step S30 into a casting machine to prepare slurry, and casting the slurry into a mold. S40, expanding and thickening the poured slurry.
According to the technical scheme of the embodiment, the red mud and the sugar making filter mud are combined to prepare the aerated brick, so that the red mud and the sugar making filter mud can be reused, the red mud and the sugar making filter mud are prevented from being directly discharged into the environment to pollute the environment, and the slurry prepared from the red mud and the sugar making filter mud is expanded and thickened, so that the aerated brick prepared from the red mud and the sugar making filter mud can be expanded and thickened to reduce the quality of a common brick. The embodiment effectively solves the problem of environmental pollution caused by directly discharging the red mud and the sugar making filter mud in the prior art into the environment.
In the technical solution of this embodiment, step S30 further includes adding an aluminum powder suspension to the slurry before casting. Thus, pores are easily formed, and the following chemical reaction can occur when adding aluminum powder in the embodiment: 2Al 3Ca (OH) 2 +6H 2 0→ 3CaO·Al 2 O3·6H 2 0+3H 2 The raw material ↓ contains Ca (OH) 2 The aluminum powder reacts with the alkaline solution to generate hydrogen, which is rarely dissolved in water (1L of water dissolves only 0.0189L of hydrogen at t =20 ℃), and the volume increases with increasing temperature, thus inevitably expanding the mixed slurry.
In the technical scheme of the embodiment, in the step S30, the stirring speed is 70 r/min-80 r/min, the temperature is 30-40 ℃, and the aluminum powder suspension is added 0.5-1 min before pouring. The operation has better and more uniform stirring effect, longer putting time of the aluminum powder and is not favorable for the expansion of the mixed slurry.
As shown in fig. 1, in the technical solution of this embodiment, in step S10, the raw materials include dried red mud, dried sugar-making filter mud, cement, gypsum, aluminum powder, triethanolamine, and water. The raw materials reduce environmental pollution, and the supported aerated brick has better quality, lighter weight and wider application range.
In the technical scheme of the embodiment, the moisture content of the dried red mud and the dried sugar making filter mud is lower than 10%, and the particle sizes of the dried red mud and the dried sugar making filter mud are both larger than or equal to 200 meshes. The aerated brick has good quality, if the grain diameter is small, the grain diameters are not firmly combined, the mechanical strength is low, and the aerated brick is easy to damage.
In the technical scheme of this embodiment, the red mud in step S10 comprises the following components in percentage by mass: siO 2 2 30-45%, caO 30-50%, and Al 2 O 3 Between 5% and 7%, fe 2 O 3 7-10 percent of NaOH, 4-6 percent of NaOH and Na 2 O is between 2 and 4 percent, and the overall pH value of the red mud is between 9 and 10. The aerated brick prepared by the proportion has higher mechanical strength.
In the technical solution of this embodiment, the sugar refining sludge in step S10 is a sludge obtained by carbonating sugar refining, and the calcined sludge contains the following components in percentage by mass: caO between 60% and 70%, P 2 O 5 Between 5% and 10%, K 2 O is between 5 and 10 percent, mgO is between 2 and 3 percent, and SiO is 2 Between 10% and 20%. The aerated brick prepared by the proportion has higher mechanical strength.
As shown in fig. 2 to 4, in the solution of the present embodiment, the calcination is carried out by a biofuel shaft kiln comprising: a kiln body 10 and a slow descending assembly 20. The kiln body 10 comprises a feed inlet, a discharge outlet 11 and an air inlet 12, wherein the feed inlet is arranged at the top of the kiln body 10, and the discharge outlet and the air inlet are both arranged at the bottom of the kiln body 10. The descent control assembly 20 is disposed inside the kiln body 10, and is used for burning the sludge with biofuel introduced from the inlet and slowing down the descent of the sludge.
According to the technical scheme of the embodiment, the filter mud or the raw materials required to be calcined enter the kiln body through the feed inlet, the descending speed of the calcined raw materials can be reduced through the slow descending assembly in the kiln body, so that the time of the calcined raw materials in the kiln body is longer, the preheating, combustion and cooling time of the calcined raw materials is further guaranteed, the combustion effect of the calcined raw materials is better, and the carbon emission can be greatly reduced by adopting the combustion of the biofuel. This example effectively solved the problem of environmental pollution that the raw materials of calcination in the prior art caused.
As shown in fig. 4, in the technical solution of this embodiment, the slow descending assembly 20 includes a first slow descending arc-shaped ring 21, the first slow descending arc-shaped ring 21 is installed on the kiln body 10, a via hole is formed in the middle of the first slow descending arc-shaped ring 21, and the top of the first slow descending arc-shaped ring 21 facing the kiln body 10 is downward concave. The upper surface of the first descending arc-shaped ring 21 is concavely curved, which greatly reduces the descending speed of the calcined raw material, and the concavely curved shape provides a better speed buffer when falling than the inclined downward plane. It should be noted that the first slow descending arc-shaped ring 21 may be a closed arc-shaped ring, or may be formed by a plurality of first sub-slow descending arc-shaped rings at intervals.
As shown in fig. 4, in the technical solution of this embodiment, the mathematical model of the contour line of the first descent arc-shaped ring 21 cut through the central axis of the kiln body 10 is: y = aX2, X is the abscissa, Y is the ordinate, a is a constant greater than 0.001 and less than 0.9. Above-mentioned structure has guaranteed that the arc of the upper surface of first slowly falling arc ring 21 satisfies the requirement, and the upper surface of first slowly falling arc ring 21 is too steep can lead to the descending speed of the raw and other materials of calcination faster, preheats, burning etc. inadequately, and the upper surface of first slowly falling arc ring 21 is too gentle can lead to the raw and other materials of calcination to gather easily at the in-process that descends.
In the solution of this embodiment (not shown in the drawings), the upper arc-shaped surface of the first descending arc-shaped ring 21 has a plurality of protrusions. The arrangement of the plurality of protrusions makes the surface area of the calcined raw material easily increased, and further slows down the descending speed of the calcined raw material, and the calcined raw material is not easily accumulated on the upper surface of the first descending arc-shaped ring 21. It should be noted that the plurality of protrusions are also protrusions of the arc-shaped surface, so that the red mud is not stuck on the first descending arc-shaped ring 21 to cause accumulation of calcined raw materials.
As shown in fig. 4, in the technical solution of this embodiment, the slow descending assembly 20 further includes a second slow descending arc-shaped ring 22, a central axis of the second slow descending arc-shaped ring 22 coincides with the central axis of the kiln body 10, an upper surface of the second slow descending arc-shaped ring 22 is a concave arc, a height from a middle of an upper arc surface of the second slow descending arc-shaped ring 22 to an edge of the upper arc surface of the slow descending arc-shaped ring gradually decreases, and a projection of the first slow descending arc-shaped ring 21 along the central axis of the kiln body 10 coincides with a projection of the second slow descending arc-shaped ring 22 along the central axis of the kiln body 10. The structure not only prolongs the moving track of the calcined raw material in the kiln body 10, but also prolongs the retention time of the calcined raw material in the kiln body 10, which greatly improves the preheating and calcining effects. The calcined raw material moves on the first slowly falling arc-shaped ring 21 and then falls under the action of gravity onto the second slowly falling arc-shaped ring 22. It should be noted that when the raw material to be calcined reaches the first slowly descending arc-shaped ring 21, the raw material also passes through the uniform distributor in the kiln body 10, so that the raw material to be calcined more uniformly enters the first slowly descending arc-shaped ring 21. The projection of the first slow descending arc-shaped ring 21 along the central axis of the kiln body 10 coincides with the projection of the second slow descending arc-shaped ring 22 along the central axis of the kiln body 10, so that the situation that raw materials to be calcined directly drop to the bottom of the kiln body 10 from the first slow descending arc-shaped ring 21 does not occur. In addition, the falling speed of the raw material to be calcined can also be partially adjusted by the wind speed and the wind pressure of the wind inlet.
As shown in fig. 4, in the technical solution of this embodiment, an area where a projection of the first slow-falling arc-shaped ring 21 along the central axis of the kiln body 10 coincides with a projection of the second slow-falling arc-shaped ring 22 along the central axis of the kiln body 10 occupies between 1/5 and 4/5 of an area of the projection of the first slow-falling arc-shaped ring 21 along the central axis of the kiln body 10. The above structure enables the time and speed of the raw material to be calcined in the kiln body 10 to reach more optimum values. It should be noted that the vertical distance between the first slow descending arc-shaped ring 21 and the second slow descending arc-shaped ring 22 corresponding thereto can be adjusted, the first slow descending arc-shaped ring 21 is connected with the kiln body 10 through a fastener, and the second slow descending arc-shaped ring 22 is connected with the central column arranged on the kiln body 10 through a fastener. The overlapping area between the first descending arc-shaped ring 21 and the second descending arc-shaped ring 22 can also be adjusted. The upper arc surface of the second slow descending arc-shaped ring 22 is provided with a bulge, and the mathematical model of the upper surface of the second slow descending arc-shaped ring 22 cut by the cross section of the central axis of the kiln body 10 is a hyperbolic curve.
As shown in fig. 4, in the technical solution of this embodiment, a plurality of first slow-falling arc-shaped rings 21 are arranged along the height direction of the central axis of the kiln body 10, and a plurality of second slow-falling arc-shaped rings 22 are provided in one-to-one correspondence with the first slow-falling arc-shaped rings 21. The structure further prolongs the moving track of the raw materials to be calcined in the kiln body 10, and prolongs the retention time of the red mud in the kiln body 10.
In the technical scheme of the embodiment, the formula of the raw materials comprises the following components in percentage by mass: 10 percent of cement, 20 to 40 percent of sugar-making filter mud, 50 to 60 percent of red mud, 3 to 5 percent of gypsum, 6 to 8 percent of aluminum powder, 0 to 5 percent of triethanolamine and 0.6 to 0.65 percent of water.
In the technical scheme of the embodiment, the pouring temperature is between 30 ℃ and 40 ℃, and the raw materials can also comprise fly ash. The aerated brick has better mechanical strength.
From the above, the method for preparing the aerated brick by combining the red mud and the sugar making filter mud comprises the following steps: s10, preparing materials; preparing raw materials required by the production of aerated bricks, comprising: drying red mud, drying sugar-making filter mud, cement, gypsum, aluminum powder, triethanolamine, water and the like. Wherein, the water content of the dried red mud and the dried sugar manufacturing filter mud is required to be lower than 10 percent, and the grain diameter is required to pass through 200 meshes. S20, preparing materials; the prepared and stored raw materials are measured according to certain requirements, temporarily stored in matched containers, and then sequentially fed into stirring equipment according to the sequence required by the production process so as to carry out pouring operation. S30, pouring; the materials which are temporarily stored after the batching procedure is metered are processed according to the technologySequentially putting into a pouring truck, stirring by a pouring machine to prepare mixed slurry meeting the requirements of time, temperature and consistency specified by the production process, and then pouring into a mold. Wherein the stirring speed is 70-80 r/min, the temperature is 30-40 ℃, and the aluminum powder suspension is added before 0.5-1 min before pouring. The aluminum powder is easy to interact with the alkali solution and reacts as follows, 2Al +3Ca (OH) 2 +6H 2 0→ 3CaO·Al 2 O3·6H 2 0+3H 2 × > 1 (OH) generated at the end 3 And H 2 . The aluminum powder reacts with the alkali saturated solution to generate hydrogen, which is rarely dissolved in water (1L of water dissolves only 0.0189L of hydrogen at t =20 ℃), and the volume increases with increasing temperature, thus inevitably expanding the mixed slurry. S40, standing and maintaining; and (3) continuously aerating, expanding and thickening the mixed slurry after pouring, and finally finishing the high hardening of the blank in the die, so that the aerated concrete blank reaches a certain cutting strength and is convenient to cut and process. The temperature of the static curing is 50-60 ℃, and the curing time is 1-1.5 h. S50, cutting; and (3) cutting and processing the appearance of the aerated concrete blank to meet the requirement of the appearance size of an aerated concrete product. S60, steam pressure curing; curing the aerated concrete blank by saturated steam at proper temperature and pressure until the blank is hardened. S70, discharging from the kettle; and after the blank is hardened, taking the aerated concrete product out of the kettle, lifting, breaking off, inspecting, packaging and the like.
The process method for preparing the aerated brick by combining the red mud and the sugar-making filter mud is applied to the fields of building materials and environmental protection.
Compared with the prior art, the invention has the following advantages and beneficial effects:
in the embodiment, the red mud and the sugar making filter mud are combined to prepare the aerated brick, and the red mud and the sugar making filter mud are innovatively combined for resource utilization to produce the autoclaved aerated concrete block which meets the requirements of modern buildings and is also called the aerated brick. The aerated brick provided by the embodiment has the advantages that the process method is simple, the raw material cost adopts wastes of metallurgical industry and sugar making process, the cost is low, the raw material does not need to be subjected to complex treatment, the operation is simple, and great convenience is provided for the subsequent brick making process.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for preparing aerated bricks by combining red mud and sugar-making filter mud is characterized by comprising the following steps:
s10, preparing raw materials required by production of aerated bricks;
s20, blending the raw materials in the step S10;
s30, pouring the ingredients in the step S30 into a pouring machine to prepare slurry, and pouring the slurry into a mold;
s40, expanding and thickening the poured slurry.
2. The method for producing aerated bricks by combining red mud and sugar filter mud according to claim 1, wherein step S30 further comprises adding an aluminum powder suspension to the slurry before casting.
3. The method for preparing the aerated brick by combining the red mud and the sugar manufacturing filter mud according to claim 2, wherein in the step S30, the stirring speed is between 70r/min and 80r/min, the temperature is between 30 ℃ and 40 ℃, and the aluminum powder suspension is added 0.5min to 1min before pouring.
4. The method for making aerated bricks by combining red mud with sugar making filter mud according to claim 1, wherein in the step S10, the raw materials comprise dried red mud, dried sugar making filter mud, cement, gypsum, aluminum powder, triethanolamine and water.
5. The method for making the aerated brick by combining the red mud and the sugar making filter mud according to claim 4, wherein the moisture content of the dried red mud and the dried sugar making filter mud is less than 10%, and the particle size of the dried red mud and the particle size of the dried sugar making filter mud are both more than or equal to 200 meshes.
6. The method for preparing aerated bricks by combining the red mud and the sugar manufacturing filter mud according to claim 4, wherein the red mud in the step S10 comprises the following components in percentage by mass: siO 2 2 30 to 45 percent of CaO, 30 to 50 percent of Al 2 O 3 Between 5% and 7%, fe 2 O 3 7-10%, naOH 4-6%, and Na 2 O is between 2 and 4 percent, and the integral pH value of the red mud is between 9 and 10.
7. The method for preparing the aerated brick by combining the red mud and the sugar making filter mud according to claim 4, wherein the sugar making filter mud in the step S10 is the filter mud for making sugar by a carbonic acid method, and the filter mud comprises the following components in percentage by mass after calcination: caO between 60% and 70%, P 2 O 5 Between 5% and 10%, K 2 O is between 5 and 10 percent, and MgO is between 2 and 3 percent，SiO 2 Between 10% and 20%.
8. The method for producing aerated bricks from red mud combined with sugar filter mud according to claim 7, characterized in that the calcination is carried out by means of a biofuel shaft kiln comprising:
the kiln body comprises a kiln body (10), wherein the kiln body (10) comprises a feeding hole, a discharging hole (11) and an air inlet (12), the feeding hole is formed in the top of the kiln body (10), and the discharging hole and the air inlet are formed in the bottom of the kiln body (10);
slowly fall subassembly (20), slowly fall subassembly (20) setting is in the inside of kiln body (10), be used for the feed inlet introduce have biofuel the mud that strains burns and slows down the decline of mud.
9. The method for preparing the aerated brick by combining the red mud and the sugar making filter mud according to claim 4, wherein the formula of the raw materials comprises the following components in percentage by mass: 10 percent of cement, 20 to 40 percent of sugar-making filter mud, 50 to 60 percent of red mud, 3 to 5 percent of gypsum, 6 to 8 percent of aluminum powder, 0 to 5 percent of triethanolamine and 0.6 to 0.65 percent of water.
10. The method for preparing the aerated brick by combining the red mud and the sugar manufacturing filter mud according to claim 4, wherein the pouring temperature is between 30 ℃ and 40 ℃, and the raw materials can also comprise fly ash.
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