CN101725206B - Iron ore tailing wall body autoclaved brick and preparation method thereof - Google Patents
Iron ore tailing wall body autoclaved brick and preparation method thereof Download PDFInfo
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- CN101725206B CN101725206B CN2009101857459A CN200910185745A CN101725206B CN 101725206 B CN101725206 B CN 101725206B CN 2009101857459 A CN2009101857459 A CN 2009101857459A CN 200910185745 A CN200910185745 A CN 200910185745A CN 101725206 B CN101725206 B CN 101725206B
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- China
- Prior art keywords
- iron ore
- wall body
- autoclaved brick
- ore tailings
- preparation
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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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an iron ore tailing wall body autoclaved brick and a preparation method thereof. The autoclaved brick comprises the following components in part by weight: 70 to 90 parts of iron ore tailing, 5 to 15 parts of quicklime, 3 to 8 parts of cement and 3 to 8 parts of skeletal material; and the preparation method comprises the following steps: raw material smashing, ingredient stirring, digesting, rolling, press forming and steam press maintenance. The iron ore tailing wall body autoclaved brick prepared by the method can reach level MU 10 to 25 and has the properties of low density, high intensity and the like and an industrial residue utilization ratio of as high as 80 percent; the autoclaved brick is a high-quality novel wall body material for replacing a sintered clay material; and the autoclaved brick uses the iron ore tailing as a main material, so that the environment pollution is reduced and the utilization ratio is enhanced.
Description
Technical field
The tailings that the present invention relates in the iron ore slag is handled, and specifically is a kind of iron ore tailing wall body autoclaved brick and preparation method thereof.
Background technology
Wall body autoclaved brick is to utilize flyash to be the raw material New Building Materials that stream curing forms after proportioning processing.Raw material mainly shows three aspects of grain composition of chemical compound, mineral composition and the compound of raw material to the performance impact of steam-pressing brisk.Adopting iron ore tailings belongs to the inert mineral raw material, does not have activity basically, and the wall body autoclaved brick of directly producing with the tailings proportioning is difficult for producing gelling aquation material, and is to use flyash or yellow sand to form as main raw materials in proportion at present mostly.
Summary of the invention
The invention provides a kind of iron ore tailing wall body autoclaved brick and preparation method thereof, is the main material production wall body autoclaved brick with the adopting iron ore tailings, reduced adopting iron ore tailings because of accumulation has taken a large amount of arable lands; Reduced environment pollution; Can " turn waste into wealth, turn harm into good ", meet national industrial policies.
Technical scheme of the present invention is:
A kind of iron ore tailing wall body autoclaved brick is characterized in that: each raw material components is by weight than being: adopting iron ore tailings 70-90, quicklime 5-15, cement 3-8, aggregate 3-8.
Described iron ore tailing wall body autoclaved brick is characterized in that: described aggregate is selected rubble for use, and particle diameter is 2.5-5.0mm.
Described iron ore tailing wall body autoclaved brick is characterized in that: the mass percent of the main chemical constituent of described adopting iron ore tailings is:
| Composition | SiO 2 | Al 2O 3 | Fe 2O 3 | MgO | CaO | K 2O | TiO 2 | FeO | MnO | The LOI loss on ignition | Total |
| ％ | 68.22 | 8.07 | 2.41 | 3.66 | 3.63 | 3.31 | 0.22 | 7.85 | 0.11 | 1.02 | 98.6 |
The preparation method of described iron ore tailing wall body autoclaved brick is characterized in that: may further comprise the steps:
(1), raw material is handled: lump lime is carried out Mechanical Crushing, and ball mill carries out grinding;
(2), batching with stir: by weight than with each raw material components: the quicklime behind the grinding, adopting iron ore tailings, cement and aggregate add water and evenly mix, stirring;
(3), digestion: the compound after the stirring gets into the continous way slaking silos and digests;
(4), rolling: postdigestive compound through rolling, is added water and carries out the secondary moisturizing;
(5), compression moulding: the compound behind the rolling becomes adobe through the compression moulding of hydraulic brick press machine;
(6), steam press maintenance: green brick forming carries out the high temperature steam press maintenance after finishing, and gets finished product.
The preparation method of described iron ore tailing wall body autoclaved brick is characterized in that: the operating pressure 1-2MPa of described high temperature steam press maintenance.
A kind of iron ore tailing wall body autoclaved brick: each composition is by weight than being adopting iron ore tailings 80%, cement 5%, lime 10%, aggregate (2.5-5.0mm) 5% in the raw material.
Described each raw material components mixing and water adding amount is 10%; Described secondary rate of water make-up is 2.0%.
Adopting iron ore tailings of the present invention is the tailings that utilizes Anhui Da Chang Mining Group exploitation iron ore in the Huoqiu County.
The mineral composition of adopting iron ore tailings according to the invention: the essential mineral of adopting iron ore tailings consists of: hornblende, quartz, feldspar, mica etc.Its structure is the silicate mineral structure, wherein, the hornblende iron content, mica contains potassium.
Adopting iron ore tailings particle size analysis table:
Domestic and international research proves, exists some mineral colloids in the mine tailing, they have certain electrically, absorbability and bigger surface can, under alkaline excitation, this colloidal substance can produce ion-exchange with the hydrated product of cement paste, forms new agglomerate.Simultaneously, under the effect of high temperature water thermal medium, the part silica of mine tailing is dissolved in the liquid phase in the batch, can be combined into various types of hydrated calcium silicates with the calcium hydroxide that is dissolved in the liquid phase.Therefore these aquation mineral all are the lower materials of solubility, are easy to make liquid phase to reach capacity and separate out.Be connected the crystallization intergrowth of formation between the knot grain of separating out through the crystallization contact point.Along with crystalline solid newly-generated in the liquid phase is constantly separated out, the crystallization intergrowth will further be filled, closely knit and reinforcement.Certainly these agglomerates all are to rely on more intense chemical bond to combine the net structure that forms.Because steam-pressing brisk is at certain forming under the pressure, and the tight ness rating of contact surface all increases between cement, calcium hydroxide and the mineral, adds hydration reaction, make it strong gelling quartz particles and other material simultaneously.
Research shows: cement not only can more closely combine with quartz particles in hydration process, can solidify some non-persistent components in the mine tailing simultaneously.But the quartz so that crystal form exists need have this character in the side in the water under high pressure thermal environment, and therefore, this programme proposes, and should adopt the high temperature maintaining process behind the green brick forming.
Adopting iron ore tailings of the present invention is as solid waste SiO
2Content belongs to medium silicone content waste residue greater than 65%, has value.
From last table, find out; The mine tailing results of grain size analysis can see that the particle diameter of mine tailing concentrates on below the 0.16mm, because particle diameter reaches 47% less than the 0.074mm particle, fine powder content is very big; Overall particle size is thinner; When making steam-pressing brisk, should rationally adjust the ratio of cementitious material, cementitious matter introducing amount is bigger; And that should adjust compound rationally joins level, needs to introduce the part aggregate, to gain in strength.
The prepared iron tailings wall body autoclaved brick of the present invention can reach the MU10-25 level, has characteristics such as density is low, intensity height, and the industrial residue utilization rate reaches 80%, is the high-quality novel wall material that substitutes sintered clay product; And utilize adopting iron ore tailings to be primary raw material, reduced environment pollution, improved utilization rate.
The specific embodiment
The percentage by weight of each raw material components: adopting iron ore tailings 80%, quicklime 10%, cement 5%, particle diameter are the rubble 5% of 2.5-5.0mm.
The preparation method of iron ore tailing wall body autoclaved brick:
1, raw material is handled: lump lime is carried out Mechanical Crushing through jaw crusher, be stored in the feed bin behind the ball mill grinding;
2, batching and stirring: by weight than carrying out even batching accurately, the material after the batching is transported to the continous way slaking silos to each raw material components after the metering of batch (-type) twin-shaft mixer adds the water stirring by feeder, electronic measuring scale; Each raw material components mixing and water adding amount is 10%;
3, digestion: the compound after the stirring gets into the continous way slaking silos and digests, and makes material uniform motion in slaking silos, can guarantee digestion time, can avoid tying the storehouse phenomenon again;
4, rolling: postdigestive material rolls through forcing the rolling mixer to mix, and mainly plays activation, stirring, crushing, plasticising and compaction, and adds water and carry out the secondary moisturizing; Described secondary rate of water make-up is 2.0%.
5, compression moulding: pass through ZY1200 hydraulic forming machine compression moulding adobe behind the rolling;
6, steam press maintenance: under the operating pressure of 1.5Mpa, carry out the high temperature steam press maintenance behind the green brick forming, the finished product that maintenance is good is pulled out still by hoist engine, and anchor clamps are discharged into the finished product stockyard and store up respectively.
Claims (3)
1. an adopting iron ore tailings steams and presses wall body brick, and it is characterized in that: each raw material components is by weight than being: adopting iron ore tailings 70-90, quicklime 5-15, cement 3-8, aggregate 3-8;
Described aggregate is selected rubble for use, and particle diameter is 2.5-5.0mm,
The mass percent of the main chemical constituent of described adopting iron ore tailings is:
2. adopting iron ore tailings according to claim 1 steams the preparation method who presses wall body brick, it is characterized in that: may further comprise the steps:
(1), raw material is handled: lump lime is carried out Mechanical Crushing, and ball mill carries out grinding;
(2), batching with stir: by weight than with each raw material components: the quicklime behind the grinding, adopting iron ore tailings, cement and aggregate add water and evenly mix, stirring;
(3), digestion: the compound after the stirring gets into the continous way slaking silos and digests;
(4), rolling: postdigestive compound through rolling, is added water and carries out the secondary moisturizing;
(5), compression moulding: the compound behind the rolling becomes adobe through the compression moulding of hydraulic brick press machine;
(6), steam press maintenance: green brick forming carries out the high temperature steam press maintenance after finishing, and gets finished product.
3. adopting iron ore tailings according to claim 2 steams the preparation method who presses wall body brick, it is characterized in that: the operating pressure 1-2MPa of described high temperature steam press maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101857459A CN101725206B (en) | 2009-11-30 | 2009-11-30 | Iron ore tailing wall body autoclaved brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101857459A CN101725206B (en) | 2009-11-30 | 2009-11-30 | Iron ore tailing wall body autoclaved brick and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101725206A CN101725206A (en) | 2010-06-09 |
| CN101725206B true CN101725206B (en) | 2012-01-04 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336550B (en) * | 2011-07-20 | 2014-08-27 | 武汉钢铁(集团)公司 | Non-steamed brick and preparation method thereof |
| CN102390944B (en) * | 2011-07-29 | 2013-01-02 | 武汉理工大学 | Gradation design method of tailing autoclaved bricks |
| CN103449839B (en) * | 2013-02-04 | 2015-12-23 | 李伟波 | Make composition of building block and preparation method thereof |
| CN103396074A (en) * | 2013-08-08 | 2013-11-20 | 太原钢铁(集团)有限公司 | Aerated concrete building block and manufacturing method thereof |
| CN103896554B (en) * | 2014-02-28 | 2016-08-17 | 武汉理工大学 | A kind of with dolomite mine tailing and iron tailings steam-pressing brisk as primary raw material and preparation method thereof |
| CN104926254A (en) * | 2015-06-02 | 2015-09-23 | 马鞍山南山开发公司 | Method for producing autoclaved bricks from iron tailings |
| CN105439521A (en) * | 2015-11-24 | 2016-03-30 | 河南誉金技术服务有限公司 | Method for preparing autoclaved bricks from silicone-series iron alloy dust |
| CN105776983B (en) * | 2016-02-03 | 2018-06-22 | 中国地质大学（北京） | A kind of iron tailings steam-pressing brisk and preparation method thereof |
| CN107100669B (en) * | 2017-04-25 | 2023-09-12 | 贵州理工学院 | Double-tube combined rotary jet sand setting liquefying device |
| CN107010913A (en) * | 2017-05-18 | 2017-08-04 | 安徽省润乾节能建材科技股份有限公司 | A kind of steam pressure Antique Imitation Tiles and its processing technology |
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2009
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