CN115215622A - Application method of furnace slag in aerated concrete block production - Google Patents
Application method of furnace slag in aerated concrete block production Download PDFInfo
- Publication number
- CN115215622A CN115215622A CN202110408586.5A CN202110408586A CN115215622A CN 115215622 A CN115215622 A CN 115215622A CN 202110408586 A CN202110408586 A CN 202110408586A CN 115215622 A CN115215622 A CN 115215622A
- Authority
- CN
- China
- Prior art keywords
- slag
- grinding
- hours
- quicklime
- aerated concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002893 slag Substances 0.000 title claims abstract description 30
- 239000004567 concrete Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000000292 calcium oxide Substances 0.000 claims abstract description 16
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000004568 cement Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010883 coal ash Substances 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000012258 culturing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009400 out breeding Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 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
- C04B28/14—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
- C04B28/142—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 containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
-
- 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
Abstract
An application method of slag in aerated concrete block production comprises the following steps: grinding slag, grinding massive quicklime, proportioning, blending and steam curing; the invention takes the slag as the main siliceous material, has lower cost compared with other siliceous materials, simultaneously reduces the stacking of the slag, has good effect on environmental protection, changes the grading of particles of slurry, has uniform pore size of the building blocks, small density of the building blocks and high strength and durability.
Description
Technical Field
The invention relates to the technical field of autoclaved aerated concrete block production, in particular to an application method of furnace slag in aerated concrete block production.
Background
The autoclaved aerated concrete is a porous structure formed by taking a calcareous material and a siliceous material as basic components, taking aluminum powder as a gas generating material and adopting a chemical reaction gas generating mode, cutting to form a lightweight artificial stone which meets the market requirement and has a certain specification, and obtaining the physical strength through autoclaved curing. It is also believed that: the aerated concrete is a novel wall material which is prepared by using cement, lime, quartz sand (fly ash), a gas former, a bubble stabilizer, a regulator and other substances as main raw materials through the working procedures of grinding, metering and proportioning, stirring and pouring, gas forming and expanding, cutting, autoclaved curing, finished product processing and the like.
From the macroscopic physical composition, it has a large number of fine and uniform pore structures, which is described as belonging to the porous concrete class, from the viewpoint of the basic composition materials and the hydration reactions and products between these materials, it belongs to the silicate concrete class, from the viewpoint of the method of obtaining strength, it belongs to the autoclaved product, from the viewpoint of the method of forming the porous structure, it belongs to the gas generation by chemical reaction between the material components, so-called "air-entrapping" rather than the addition of foam, and therefore, it is called autoclaved aerated concrete block, also called air-entrapping brick.
Slag, one of industrial solid wastes, and waste residues discharged from coal-fired power plants, industrial and civil boilers and other equipment, which are also called coal residues. The main components are silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, magnesium oxide and the like. At present, the waste residues are widely distributed in China, the utilization amount is small, and sulfur-containing gas is discharged to pollute the atmosphere and harm the environment when the waste residues are accumulated; how to apply the slag in the production of the aerated concrete block, the production cost is reduced, the environmental quality is improved, and the technical problem which is difficult to solve for a long time is formed.
In view of the above, a method for applying slag in the production of aerated concrete blocks has been developed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an application method of slag in aerated concrete block production, wherein the slag is used as a main siliceous material, and has lower cost compared with other siliceous materials, meanwhile, the stacking of the slag is reduced, the slag has good effect on environmental protection, the gradation of particles of slurry is changed, the pore size of the block is uniform, the density of the block is small, and the strength and the durability are high.
In order to achieve the purpose, the invention adopts the following technical scheme: an application method of slag in aerated concrete block production comprises the following steps: grinding slag, grinding massive quicklime, proportioning, blending and steam curing.
Step one, slag levigating: conveying slag to a furnace by belt conveying
Milling with a wet ball mill to obtain a fineness of 0.08 and a square-hole sieve residue of 35%;
secondly, grinding the massive quicklime: grinding the massive quicklime to fine degree, wherein the fineness is 0.08, the screen residue of a square-hole screen is 15%, and storing the ground quicklime into a steel bin for later use;
thirdly, proportioning: finely ground slag: 54-60 percent of coal ash, 27-33 percent of fly ash, 7-13 percent of cutting waste slurry and 3 percent of desulfurized gypsum, wherein the sum of the weight of the components is one hundred percent; preparing the proportioned materials into finished product slurry, storing for later use, and continuously stirring for 2 hours to prevent the materials from precipitating and homogenize various materials;
step three, batching: adding cement, quicklime and aluminum powder into the finished product slurry in proportion, pouring at 45 ℃, culturing for 1.5 hours, and moving the blank to a cutting table for blank cutting after a blank with initial strength is formed; the ratio of the finished product slurry to the cement is 1;
fourthly, steam curing: cutting the grouped products, carrying out steam curing in an autoclave, raising the temperature for 2-3 hours to reach the temperature of more than 190 ℃, keeping the constant temperature for 7-9 hours in the steam curing, slowly lowering the temperature to the normal temperature for 2-3 hours, opening a kettle door, pulling the products out of the kettle for packaging, and stacking the finished products.
The beneficial effects of the invention are: the slag is used as a main siliceous material, so that the cost is lower compared with other siliceous materials, meanwhile, the stacking of the slag is reduced, the environment is protected, the grading of particles of slurry is changed, the pore size of the building block is uniform, the density of the building block is small, and the strength and the durability are high.
Detailed Description
The present invention is further illustrated in detail below with reference to examples and embodiments:
example 1
Grinding slag: conveying slag to a furnace by belt conveying
Milling with a wet ball mill to obtain a fineness of 0.08 and a square-hole sieve residue of 35%;
grinding the blocky quicklime: grinding the massive quicklime to a fineness of 0.08, sieving with a square-hole sieve to a residue of 15%, and storing the ground quicklime into a steel silo for later use;
proportioning: finely ground slag: 57 percent, 30 percent of fly ash, 10 percent of cutting waste slurry and 3 percent of desulfurized gypsum, wherein the sum of the weight of the components is one hundred percent; preparing the proportioned materials into finished product slurry, storing for later use, and continuously stirring for 2 hours to prevent the materials from precipitating and homogenize various materials;
preparing materials: adding 150KG of cement, 540KG of quick lime and 2.42KG of aluminum powder into 3600KG of finished product slurry, pouring at the temperature of 45 ℃, carrying out breeding for 1.5 hours, and moving the blank to a cutting table for blank cutting after a blank with initial strength is formed;
steaming: cutting the grouped products, carrying out steam curing in an autoclave, raising the temperature for 2-3 hours to reach the temperature of more than 190 ℃, keeping the constant temperature for 8 hours in the steam curing, slowly cooling to the normal temperature for 2-3 hours, opening the autoclave door, pulling the products out of the autoclave for packaging, and stacking the finished products.
Claims (2)
1. An application method of slag in aerated concrete block production is characterized in that: the process comprises the following steps: grinding slag, grinding massive quicklime, proportioning, blending and steam curing.
2. The application method of the slag in the production of aerated concrete blocks according to claim 1, characterized by comprising the following steps:
firstly, grinding slag: conveying slag to a furnace by belt conveying
Milling with a wet ball mill to obtain a fineness of 0.08 and a square-hole sieve residue of 35%;
secondly, grinding the massive quicklime: grinding the massive quicklime to fine degree, wherein the fineness is 0.08, the screen residue of a square-hole screen is 15%, and storing the ground quicklime into a steel bin for later use;
thirdly, proportioning: finely ground slag: 54-60% of coal ash, 27-33% of coal ash, 7-13% of cutting waste slurry and 3% of desulfurized gypsum, wherein the sum of the weight of the components is one hundred percent; preparing the proportioned materials into finished product slurry, storing for later use, and continuously stirring for 2 hours to prevent the materials from precipitating and simultaneously homogenizing various materials;
thirdly, preparing materials: adding cement, quicklime and aluminum powder into the finished product slurry in proportion, pouring at 45 ℃, culturing for 1.5 hours, and moving the blank to a cutting table for blank cutting after a blank with initial strength is formed; the ratio of the finished product slurry to the cement is 1;
step four, steam curing: cutting grouped products, carrying out steam curing in an autoclave, heating for 2-3 hours to reach the temperature of more than 190 ℃, keeping the constant temperature for 7-9 hours in steam curing, slowly cooling to the normal temperature for 2-3 hours, opening a kettle door, pulling the products out of the kettle for packaging, and stacking finished products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110408586.5A CN115215622A (en) | 2021-04-16 | 2021-04-16 | Application method of furnace slag in aerated concrete block production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110408586.5A CN115215622A (en) | 2021-04-16 | 2021-04-16 | Application method of furnace slag in aerated concrete block production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115215622A true CN115215622A (en) | 2022-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110408586.5A Pending CN115215622A (en) | 2021-04-16 | 2021-04-16 | Application method of furnace slag in aerated concrete block production |
Country Status (1)
| Country | Link |
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| CN (1) | CN115215622A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2378228C1 (en) * | 2008-08-28 | 2010-01-10 | Общество с ограниченной ответственностью "Комбинат пористых материалов" | Cellular concrete of autoclave hardening |
| CN102757211A (en) * | 2012-07-20 | 2012-10-31 | 泰州振昌工业废渣综合利用有限责任公司 | Aerated concrete block produced through using specially-made mineral waste residue and tailings steel slag and production method of aerated concrete block |
| CN104876520A (en) * | 2015-04-21 | 2015-09-02 | 太原钢铁(集团)有限公司 | Manufacturing method for powder ash air-entrained concrete blocks |
| CN105198315A (en) * | 2015-09-14 | 2015-12-30 | 河南兴安新型建筑材料有限公司 | Coal fired furnace slag autoclaved aerated concrete building block and preparation method of coal fired furnace slag autoclaved aerated concrete building block |
| CN105645991A (en) * | 2016-01-05 | 2016-06-08 | 重庆建工新型建材有限公司 | High-doping-amount furnace slag aerated concrete building block and preparation method thereof |
| CN111348880A (en) * | 2020-03-27 | 2020-06-30 | 福州大学 | Domestic garbage incinerator slag alkali slag aerated concrete building block and preparation method thereof |
| CN111978099A (en) * | 2020-09-02 | 2020-11-24 | 济南大学 | Aerated concrete and preparation method thereof |
-
2021
- 2021-04-16 CN CN202110408586.5A patent/CN115215622A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2378228C1 (en) * | 2008-08-28 | 2010-01-10 | Общество с ограниченной ответственностью "Комбинат пористых материалов" | Cellular concrete of autoclave hardening |
| CN102757211A (en) * | 2012-07-20 | 2012-10-31 | 泰州振昌工业废渣综合利用有限责任公司 | Aerated concrete block produced through using specially-made mineral waste residue and tailings steel slag and production method of aerated concrete block |
| CN104876520A (en) * | 2015-04-21 | 2015-09-02 | 太原钢铁(集团)有限公司 | Manufacturing method for powder ash air-entrained concrete blocks |
| CN105198315A (en) * | 2015-09-14 | 2015-12-30 | 河南兴安新型建筑材料有限公司 | Coal fired furnace slag autoclaved aerated concrete building block and preparation method of coal fired furnace slag autoclaved aerated concrete building block |
| CN105645991A (en) * | 2016-01-05 | 2016-06-08 | 重庆建工新型建材有限公司 | High-doping-amount furnace slag aerated concrete building block and preparation method thereof |
| CN111348880A (en) * | 2020-03-27 | 2020-06-30 | 福州大学 | Domestic garbage incinerator slag alkali slag aerated concrete building block and preparation method thereof |
| CN111978099A (en) * | 2020-09-02 | 2020-11-24 | 济南大学 | Aerated concrete and preparation method thereof |
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Application publication date: 20221021 |