CN116023076A - Preparation method of high-mixing-amount slag fly ash brick - Google Patents
Preparation method of high-mixing-amount slag fly ash brick Download PDFInfo
- Publication number
- CN116023076A CN116023076A CN202211660072.XA CN202211660072A CN116023076A CN 116023076 A CN116023076 A CN 116023076A CN 202211660072 A CN202211660072 A CN 202211660072A CN 116023076 A CN116023076 A CN 116023076A
- Authority
- CN
- China
- Prior art keywords
- slag
- fly ash
- parts
- fine
- coarse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 139
- 239000010881 fly ash Substances 0.000 title claims abstract description 50
- 239000011449 brick Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000748 compression moulding Methods 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 3
- 239000002910 solid waste Substances 0.000 abstract description 12
- 239000004566 building material Substances 0.000 abstract description 2
- 230000029087 digestion Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000003245 coal Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000011499 joint compound Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 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 1
Classifications
-
- 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
- Processing Of Solid Wastes (AREA)
Abstract
A preparation method of a high-mixing slag fly ash brick belongs to the technical field of comprehensive utilization of coal-fired solid wastes and novel energy-saving building materials, solves the technical problem of utilization of slag solid wastes, and comprises the following steps: 1. one part of slag is screened by a vibrating screen and is used as coarse slag for standby, and the other part of slag and slag which does not pass through the vibrating screen are crushed by a vertical crusher and are used as fine slag for standby; 2. weighing 15-25 parts of coarse slag, 15-25 parts of fine slag, 33-55 parts of fly ash, 0-7 parts of blast furnace slag and 10 parts of cementing material according to the weight ratio, and fully mixing to prepare a mixture containing high-doping slag; 3. and sequentially carrying out digestion, compression molding and steam curing on the mixture containing the high-doping slag to obtain the finished high-doping slag fly ash brick. The invention realizes the crushing treatment of partial slag and the matching use of coarse slag and fine slag, can optimize the grain composition of the mixture, improve the performance of autoclaved fly ash brick blanks, improve the blending proportion of slag and reduce the solid waste dumping treatment of slag.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of coal-fired solid wastes and novel energy-saving building materials, and particularly relates to a preparation method of a high-mixing slag fly ash brick.
Background
The autoclaved fly ash brick is prepared by taking fly ash and aggregate as main raw materials, adding a proper amount of lime and gypsum, stirring, mixing, digesting, press forming and medium-pressure curing, wherein the strength can reach more than MU10 grade, and the autoclaved fly ash standard brick is completely consistent with the common solid clay brick. The common aggregate mainly comprises broken stone, river sand, stone powder, blast furnace slag, slag and the like. The raw materials commonly used in the industry at present are quicklime or calcium carbide mud, fly ash, slag, broken stone, a small amount of gypsum and the like.
At present, the comprehensive utilization technology of the fly ash is more mature than that of the slag, the utilization way is wider, the fly ash can be used for preparing ultrafine fly ash through sorting or ball milling besides the fly ash bricks, the fly ash can be used for concrete production, and the usable range of the slag is narrower.
The ash content is different due to the different coal quality of the upstream power plant, and the production amount of the fly ash and the slag correspondingly fluctuates. If the quality of the coal is poor and the ash content is large, the amount of generated slag is increased, the disposal contradiction of the slag compared with the fly ash is more prominent in the building construction season, and the slag cannot be fully utilized under the condition of limited yield of the fly ash bricks.
Because the fly ash and the slag are industrial solid wastes generated after the pulverized coal of the boiler of the generator set is combusted, the main components of the fly ash and the slag are basically the same, and the difference is that the fly ash has smaller fineness (15-45% of 4900-hole sieve allowance), the slag particles are coarser (see table 1 below) and contain more than about 25% of water.
The main components of the slag are similar to fly ash, and proper amount of slag is added as light aggregate to effectively improve the gradation of the mixture, so that the slag can be replaced with each other in principle from the reaction of autoclaved fly ash brick materials, but is limited by factors such as loss on ignition, larger particles, large moisture content of wet slag, and the like, so that the fly ash cannot be completely replaced, the gradation of the mixture can be adversely affected by directly using the untreated slag with high mixing amount, the coarse and fine materials can generate serious segregation phenomenon in the transportation process of the materials in each process link, the uniformity of the materials is poor, the compactness of formed brick blanks is insufficient, and the strength of finished products is finally affected.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and solve the technical problem of solid waste utilization of slag, and provides a preparation method of a high-mixing-amount slag fly ash brick.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the preparation method of the high-mixing slag fly ash brick comprises the following steps:
s1, transporting wet discharged slag to a production site, and respectively treating the slag through two systems: screening a part of slag by a vibrating screen with the aperture of 30mm, taking the screened slag as coarse slag, and conveying the coarse slag to a coarse slag bin for later use by adopting a bucket elevator; the screen hole diameter of the vibrating screen is optimal, if the screen hole is too small, the fluidity of wet slag is poor, the screening efficiency is low, and if the screen hole is too large, the screening effect is poor; the other part of slag and slag with the grain diameter of more than 30mm which does not pass through the vibrating screen are crushed by the vertical crusher and then are used as fine slag, the fine slag is conveyed to a fine slag bin for standby by adopting a bucket elevator, and the grain diameter distribution condition of the crushed fine slag is as follows: 34.3% of slag with the grain diameter less than 0.75mm, 44.8% of slag with the grain diameter less than or equal to 0.75mm and less than 1.25mm, 13.2% of slag with the grain diameter less than or equal to 1.25mm and less than 2.5mm, 7.7% of slag with the grain diameter less than or equal to 2.5mm and 0% of slag with the grain diameter more than or equal to 5 mm;
s2, weighing 15-25 parts of coarse slag and 15-25 parts of fine slag prepared in the step S1 according to weight proportions, and feeding 33-55 parts of fly ash, 0-7 parts of blast furnace slag and 10 parts of cementing material into a stirrer for fully mixing to prepare a mixture containing high-doping slag; it should be noted that slag enters the fine slag bin after being crushed, and blocking and unsmooth discharging are easy to occur in the discharging metering process of the fine slag bin, so that a simple arch breaking device is arranged at a fine slag discharging opening, and the effects of loosening materials and promoting smooth discharging are achieved;
s3, the mixture containing the high-content slag is digested and then sent to a brick making machine for compression molding, and the green bricks are sent to a steam curing kettle for steam curing after compression molding, so that the finished high-content slag fly ash bricks are obtained.
Because the slag is loose porous particles, the stacking density is small, the water saturation capacity is strong, but the water content is much hidden in the slag particles, the molding water content of the fly ash brick requires that the free water content of the mixture is 11% -13%, and the water content detection data of the mixture is increased in order to ensure the molding water content along with the increase of the slag doping amount, and the water content control standard is properly improved at the moment so as to obtain the water content required by the optimal molding effect.
Further, in the step S1, the gap between the hammer head and the lining plate of the vertical crusher is adjusted to be 1cm, if the gap is too large, the crushing effect is poor, and if the gap is too small, the blanking of the crusher is not smooth, and overload tripping and shutdown of the crusher are easily caused.
In the step S2, the weight ratio of the coarse slag to the fine slag is (0.5-1): 1.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the matching and use of coarse and fine slag according to the proportion by crushing part of slag, which not only can optimize the grain composition of the mixture and improve the performance of autoclaved fly ash brick blanks, but also can improve the blending proportion of slag and reduce the dumping disposal of solid waste of slag. Taking a fly ash standard brick (240 mm is 115mm is 53 mm) as an example, about 4.5 tons of slag can be consumed in every ten thousands of standard bricks, the production line of autoclaved fly ash standard bricks with 1 hundred million autoclaved fly ash per year can increase the consumption of slag by 4.5 ten thousand tons, and if the cost is calculated by 50 yuan/ton dumping disposal, the economic benefit can be created by 225 ten thousand yuan per year; if the same amount of fly ash is replaced, commodity fly ash can be directly sold, and the benefit can be created to be 135 ten thousand yuan in terms of 30 yuan/ton. Besides the direct economic benefit, the method can bring great environmental protection benefit. According to the change of the coal quality and the combustion process of the upstream coal-fired power plant, the process can be flexibly adjusted, and the maximization of the utilization benefit of solid waste is realized.
2. In order to cope with the change of the solid waste production of the upstream coal-fired power plant, the invention has strong practical guidance significance on the comprehensive utilization of the solid waste of the power plant; according to the invention, when the loss on ignition of the fly ash and the coarse slag is lower than 6%, the total amount of the fly ash and the slag in the preparation of the autoclaved fly ash brick reaches more than 90% of the process proportion, and when the loss on ignition of the fly ash and the coarse slag is higher than 6%, 0-7 parts of blast furnace slag is added, so that the defect of insufficient strength caused by large influence on the loss on ignition can be solved, and if solid wastes such as carbide mud are used as cementing materials, the production of the autoclaved fly ash brick from all solid wastes can be realized, and the autoclaved fly ash brick has higher popularization and application values.
Detailed Description
The present invention will be described in further detail with reference to examples.
The preparation method of the high-mixing slag fly ash brick comprises the following steps:
s1, transporting wet discharged slag to a production site, and respectively treating the slag through two systems: screening a part of slag by a vibrating screen with the aperture of 30mm, taking the screened slag as coarse slag, and conveying the coarse slag to a coarse slag bin for later use by adopting a bucket elevator; the other part of slag and slag with the grain diameter of more than 30mm which does not pass through the vibrating screen are crushed by a vertical crusher (the clearance between the hammer head and the lining plate is adjusted to be 1 cm) and then are used as fine slag, the fine slag is conveyed to a fine slag bin by a bucket elevator for standby, and the grain diameter distribution condition of the fine slag after crushing is as follows: 34.3% of slag with the grain diameter less than 0.75mm, 44.8% of slag with the grain diameter less than or equal to 0.75mm and less than 1.25mm, 13.2% of slag with the grain diameter less than or equal to 1.25mm and less than 2.5mm, 7.7% of slag with the grain diameter less than or equal to 2.5mm and 0% of slag with the grain diameter more than or equal to 5 mm;
s2, weighing 15-25 parts of coarse slag and 15-25 parts of fine slag prepared in the step S1 according to the weight ratio, and mixing 33-55 parts of fly ash, 0-7 parts of blast furnace slag and 10 parts of cementing material in a (0.5-1) weight ratio of 1, and sending the mixture into a stirrer for fully mixing to prepare a mixture containing high-doping slag;
s3, the mixture containing the high-content slag is digested and then sent to a brick making machine for compression molding, and the green bricks are sent to a steam curing kettle for steam curing after compression molding, so that the finished high-content slag fly ash bricks are obtained.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The preparation method of the high-mixing slag fly ash brick is characterized by comprising the following steps of:
s1, transporting wet discharged slag to a production site, and respectively treating the slag through two systems: screening a part of slag by a vibrating screen with the aperture of 30mm, taking the screened slag as coarse slag, and conveying the coarse slag to a coarse slag bin for later use by adopting a bucket elevator; the other part of slag and slag with the grain diameter of more than 30mm which does not pass through the vibrating screen are crushed by the vertical crusher and then are used as fine slag, the fine slag is conveyed to a fine slag bin for standby by adopting a bucket elevator, and the grain diameter distribution condition of the crushed fine slag is as follows: 34.3% of slag with the grain diameter less than 0.75mm, 44.8% of slag with the grain diameter less than or equal to 0.75mm and less than 1.25mm, 13.2% of slag with the grain diameter less than or equal to 1.25mm and less than 2.5mm, 7.7% of slag with the grain diameter less than or equal to 2.5mm and 0% of slag with the grain diameter more than or equal to 5 mm;
s2, weighing 15-25 parts of coarse slag and 15-25 parts of fine slag prepared in the step S1 according to weight proportions, and feeding 33-55 parts of fly ash, 0-7 parts of blast furnace slag and 10 parts of cementing material into a stirrer for fully mixing to prepare a mixture containing high-doping slag;
s3, the mixture containing the high-content slag is digested and then sent to a brick making machine for compression molding, and the green bricks are sent to a steam curing kettle for steam curing after compression molding, so that the finished high-content slag fly ash bricks are obtained.
2. The method for preparing the high-content slag fly ash brick according to claim 1, which is characterized in that: in the step S1, the gap between the hammer head of the vertical crusher and the lining plate is adjusted to be 1cm.
3. The method for preparing the high-content slag fly ash brick according to claim 1, which is characterized in that: in the step S2, the weight ratio of the coarse slag to the fine slag is (0.5-1): 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211660072.XA CN116023076A (en) | 2022-12-23 | 2022-12-23 | Preparation method of high-mixing-amount slag fly ash brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211660072.XA CN116023076A (en) | 2022-12-23 | 2022-12-23 | Preparation method of high-mixing-amount slag fly ash brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116023076A true CN116023076A (en) | 2023-04-28 |
Family
ID=86069883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211660072.XA Pending CN116023076A (en) | 2022-12-23 | 2022-12-23 | Preparation method of high-mixing-amount slag fly ash brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116023076A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276219A (en) * | 2011-05-26 | 2011-12-14 | 四川方大新型建材科技开发有限责任公司 | Autoclaved red mud brick and preparation method thereof |
| CN103664108A (en) * | 2013-09-22 | 2014-03-26 | 广东环兴环保节能科技有限公司 | Novel environment-friendly building brick and preparation method |
| CN107162518A (en) * | 2017-07-12 | 2017-09-15 | 包头市晟泰环保科技建材有限责任公司 | Concrete solid brick and preparation method thereof |
| CN112608046A (en) * | 2020-11-21 | 2021-04-06 | 河北京兰水泥有限公司 | Coal-fired furnace slag composite mixed material and preparation method and application thereof |
| CN113501700A (en) * | 2021-01-12 | 2021-10-15 | 山西鼎正环保建材有限公司 | Method for preparing autoclaved building blocks by comprehensively utilizing solid sulfur ash of circulating fluidized bed |
-
2022
- 2022-12-23 CN CN202211660072.XA patent/CN116023076A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276219A (en) * | 2011-05-26 | 2011-12-14 | 四川方大新型建材科技开发有限责任公司 | Autoclaved red mud brick and preparation method thereof |
| CN103664108A (en) * | 2013-09-22 | 2014-03-26 | 广东环兴环保节能科技有限公司 | Novel environment-friendly building brick and preparation method |
| CN107162518A (en) * | 2017-07-12 | 2017-09-15 | 包头市晟泰环保科技建材有限责任公司 | Concrete solid brick and preparation method thereof |
| CN112608046A (en) * | 2020-11-21 | 2021-04-06 | 河北京兰水泥有限公司 | Coal-fired furnace slag composite mixed material and preparation method and application thereof |
| CN113501700A (en) * | 2021-01-12 | 2021-10-15 | 山西鼎正环保建材有限公司 | Method for preparing autoclaved building blocks by comprehensively utilizing solid sulfur ash of circulating fluidized bed |
Non-Patent Citations (1)
| Title |
|---|
| 董恒瑞;邓铃夕;王海标;: "以炉底渣和破碎加气混凝土为轻骨料制备轻质混凝土的试验研究", 重庆建筑, no. 04, 25 April 2020 (2020-04-25) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110683774B (en) | Cementing material taking slag-steel slag-gypsum as raw material and preparation method thereof | |
| CN102311240B (en) | Technology for manufacturing brick by using dried sludge | |
| CN103755378B (en) | A kind of air-entrained concrete building block and preparation method thereof | |
| CN109664406A (en) | A kind of building castoff recycling treatment system | |
| CN101666129A (en) | Construction waste sintering brick and production method thereof | |
| CN104876519B (en) | A kind of Pb-Zn tailings and Aggregate of recycled concrete prepare autoclaved lime-sand brick method | |
| CN110330303B (en) | Filling material and using method thereof | |
| CN107913777B (en) | It is a kind of using CHARACTERISTICS OF TAILINGS SAND as the Machine-made Sand of primary raw material and dry fabrication technique | |
| CN104876523A (en) | Autoclaved flyash-lime brick and preparation method thereof | |
| CN110204275B (en) | Sludge waste concrete mortar non-sintered ceramsite and preparation method thereof | |
| CN109675906A (en) | A kind of wholly-owned source recycling and reusing system of building castoff | |
| CN113213802A (en) | High-performance concrete admixture and production method thereof | |
| CN104108892B (en) | A kind of method of producing light partition board with industrial slags and construction refuse regenerated utilization | |
| CN114477803A (en) | Production method of carbide slag cement | |
| CN1810700A (en) | No-baking bearing brick of hydraulic steel slag and its production process | |
| CN213596170U (en) | Production line for producing cement clinker by solid-waste blending | |
| CN113563035A (en) | Preparation method of biomass ash autoclaved baking-free brick | |
| CN102627435B (en) | Paper pulp waste residue steam-pressing brick and preparation method thereof | |
| CN103224336A (en) | Modified treatment method of discarded papermaking white mud and technology for preparing cement admixture through single-step process | |
| CN113087487A (en) | Construction process for red mud coal gangue aggregate pavement base course stabilized by carbide slag and coal ash | |
| CN105217987A (en) | The complex slag utilizing electric arc furnace restored slag and flyash to produce and preparation technology thereof | |
| CN116023076A (en) | Preparation method of high-mixing-amount slag fly ash brick | |
| CN106495623A (en) | A kind of method that utilization molybdic tailing prepares steam-pressing brisk | |
| CN113998910A (en) | Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof | |
| CN103342490A (en) | Composite household garbage incinerator bottom slag coal ash for concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |