CN107902966A - A kind of unburned red mud porcelain granule mixture and preparation method thereof - Google Patents

A kind of unburned red mud porcelain granule mixture and preparation method thereof Download PDF

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Publication number
CN107902966A
CN107902966A CN201711070830.1A CN201711070830A CN107902966A CN 107902966 A CN107902966 A CN 107902966A CN 201711070830 A CN201711070830 A CN 201711070830A CN 107902966 A CN107902966 A CN 107902966A
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China
Prior art keywords
red mud
parts
unburned
porcelain granule
granule mixture
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CN201711070830.1A
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Inventor
李灿华
程勇
刘思
韩斌
何明生
倪俊
康凌晨
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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Priority to CN201711070830.1A priority Critical patent/CN107902966A/en
Publication of CN107902966A publication Critical patent/CN107902966A/en
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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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C04B40/0042—Powdery mixtures
    • 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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
    • 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
    • C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
    • C04B12/005—Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Included the following steps the present invention provides one kind using red mud production baking-free ceramicite red mud mixture, its preparation method：(1) red mud is dried to mass water content≤15%, selects iron to Fe2O3Mass fraction≤15%, and dealkalize processing is carried out, the pH for making red mud is 8~10, obtains pretreatment red mud；(2) each raw material is weighed by proportioning, parts by weight shared by each raw material are：Pre-process 25~62 parts of red mud, 15~25 parts of flyash, 3~10 parts of expanded perlite, 20~40 parts of clay；Each raw material weighed is mixed and stirred for uniformly, then is ground, sieves, up to the unburned red mud porcelain granule mixture.Specific surface area that the present invention has given full play to red mud is big, alkalescence is strong, has the characteristics that certain gelling, effectively reduces the production cost of baking-free ceramicite, while the industrial wastes such as red mud is got utilization, and has important economy and environmental benefit.

Description

A kind of unburned red mud porcelain granule mixture and preparation method thereof
Technical field
The invention belongs to nonferrous metallurgy Slag treatment and application technology as the second resource field, and in particular to one kind is given birth to using aluminium oxide The method of the waste red mud production baking-free ceramicite produced during production.
Background technology
The waste residue discharged in aluminum oxide production process is red mud, its mineral composition mainly has Al2O3、Na2O、SiO2、CaO、 Fe2O3、TiO2Deng.The main oxious component of red mud is containing Na2The attached liquid of O, attached liquid 2~3g/L containing alkali, pH value is 12.2~13.0 Between, Al is contained in wastewater from red mud2O3、Na2O、SiO2、CO2、NaCl、H2O etc..The red mud chemistry of Henan Sanmenxia Gorge company into Divide and be shown in Table 1.
1 red mud main chemical compositions table of table/%
Wastewater from red mud chemical composition is shown in Table 2.
Wastewater from red mud chemical composition/(mg/L) (removes pH)
At present, the utilization of red mud needs to break through two big directions, when low cost extraction valuable material, second, after drop alkali Use it for the construction materials such as concrete.
According to early-stage study, iron-bearing mineral changes with aluminium oxide, and goethite, the ratio of bloodstone also change.Sample Bloodstone content fluctuates between 20-40% in mineral composition, and goethite content fluctuates between 18-27%, and goethite is hidden Brilliant or crystallite, more with other mineral cements, therefore more major generals of goethite content largely influence concentrate grade with returning Yield.On the other hand, sample grade is thin, and specific surface area is big, and has loose structure.Siderite in above-mentioned mineral, calcite and The existing skeleton of aragonite, and have certain cementation, and sodium silicoaluminate, diaspore, waterglass play cementing and packing action, cause Mutual consolidated fill between mini porous structures and mineral, makes the separation of valuable mineral very difficult.Therefore, low cost extraction There are technical difficulty for valuable material.
Red mud is since residual attached liquid alkalescence is strong, when it is used in ordinary cement base concrete alkali collection can easily occur with gathering materials Material reaction, seriously affects later concrete performance.And when red mud prepares bake-free brick tile-making when building materials, can be on the surface of building material " scum " phenomenon occurs, this is alkaline sodium and potassium ion and the SO in concrete in red mud4 2-With reference to generation is free on coagulation Soil gelling salt and be attached to the surface of building material product.
In conclusion how to overcome the shortcomings of that existing red mud utilizes, realize red mud industrialization, commercial application, there is weight The economy and environmental benefit wanted.
The content of the invention
The purpose of the present invention is pollute environment to solve the problems, such as that current red mud is accumulated, there is provided a kind of unburned red mud porcelain granule Mixture, the haydite prepared using the mixture are had excellent mechanical property, expansion character and heat-insulating property, can effectively improved The added value that red mud utilizes, and the preparation method simple process being related to is simple, of low cost, energy conservation and environmental protection, is adapted to promote and apply.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of unburned red mud porcelain granule mixture, each component and its shared parts by weight are：Pre-process 25~62 parts of red mud, powder 15~25 parts of coal ash, 3~10 parts of expanded perlite, 20~40 parts of clay.
In such scheme, the pretreatment red mud is dried to mass water content≤15% successively by red mud, selects iron extremely Fe2O3Mass fraction≤15%, and carrying out dealkalize processing makes its pH be formed for 8~10.
In such scheme, the flyash is power plant's level-one or second-level ash.
In such scheme, the expanded perlite is material, its density is less than 100kg/m3, expansion multiple is big In 10.
In such scheme, the clay for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder Body material, plasticity index is more than 17, and waste and old fireclay refractory is used through calcining, its densified sintering product performance is good, is conducive to Reduce the additive amount of binding material and promote the mechanical property of lifting gained haydite.
A kind of preparation method of above-mentioned unburned red mud porcelain granule mixture, includes the following steps：Each raw material is weighed by proportioning, respectively Parts by weight are shared by raw material：Pre-process 25~62 parts of red mud, 15~25 parts of flyash, 3~10 parts of expanded perlite, clay 20 ~40 parts；Each raw material weighed is mixed and stirred for uniformly, then is ground, sieves, up to the unburned red mud porcelain granule mixing Material.
In such scheme, the mixing speed is 200~250r/min, and the time is 20~70min.
In such scheme, the grinding technics is to be ground into 150~300 mesh powder.
Compared with prior art, beneficial effects of the present invention are：
(1) present invention prepares unburned red mud porcelain granule mixture using red mud, and it is big, alkaline to have given full play to red mud specific surface area The characteristics of strong and gelling；Its bigger serface has larger activity, may advantageously facilitate the combination between mixture each component； Its strong basicity, can excite in batch component the inert fraction of (flyash, clay etc.)；Its gelling, can reduce unburned pottery The additive amount of cementitious material needed for grain；Using red mud and waste and old fireclay refractory as the primary raw material for preparing haydite so that The industrial wastes such as red mud are recycled, and realize the recycling of the industrial wastes such as red mud, waste and old fireclay refractory, And effectively reduce the production cost of light ceramic.
(2) present invention prepares unburned red mud porcelain granule mixture using red mud, provide further relative savings the energy, can effectively prevent red mud Unordered outer row and pollute environment, destroy ecology, there is important economy and environmental benefit.
Embodiment
For a better understanding of the present invention, with reference to the specific embodiment content that the present invention is furture elucidated, but this hair Bright content is not limited solely to the following examples.
In following embodiments, for the expanded perlite used for material, its density is less than 100kg/m3, expansion times Number is more than 10；The clay used for waste and old fireclay refractory by sorting, it is broken after gained powder body material, plasticity index is big In 17.The red mud of use provides Bayer process red mud, its main component and its shared quality percentage by Henan Sanmenxia City company Than to be shown in Table 3.
3 red mud main chemical compositions table of table/%
Component SiO2 CaO Fe2O3 Al2O3 MgO TiO2 K2O Na2O Burn alkali
Content 19.99 45.2 11.42 10.82 2.1 4.57 1.2 5.46 7.9
Embodiment 1
A kind of unburned red mud porcelain granule mixture, its preparation method comprise the following steps：
1) by red mud naturally dry or using drying machine drying, it is 10% to control its mass water content；Then magnetic separation is carried out Iron is selected, controls it to Fe2O3Mass fraction is 14.5%, and carries out dealkalize processing, makes the pH=10 of red mud, obtains pretreatment red mud；
2) by gained pretreatment red mud and flyash, expanded perlite (density 80kg/m3, expansion multiple 15), it is viscous Native (plasticity index 18) presses 30:25:5:40 mass ratio is uniformly mixed (250r/min stirs 70min), then is ground 150 mesh, screening are milled to, up to the unburned red mud porcelain granule mixture.
Unburned red mud porcelain granule mixture obtained by the present embodiment is applied to prepare unburned red mud porcelain granule, and gained is unburned red Mud haydite carries out the performance indicators such as bulk density, compression strength and 1h water absorption rates and measures, its bulk density is 912kg/m3, Cylindrical compress strength is 2.2MPa, and 1h water absorption rates are 13.21%, and property indices are excellent.
Specific surface area that the present invention has given full play to red mud is big, alkalescence is strong and has the characteristics that certain gelling, largely makes With red mud, the solid waste such as resistance to material of giving up, baking-free ceramicite production cost, and gained haydite function admirable are effectively reduced, available for preparing Insulating brick.
Embodiment 2
A kind of unburned red mud porcelain granule mixture, its preparation method comprise the following steps：
1) by red mud naturally dry or using drying machine drying, it is 13.5wt% to control its moisture content；Then magnetic separation is carried out Iron is selected, controls it to Fe2O3Mass fraction is 4.5%, and carries out dealkalize processing, makes the pH=8 of red mud, obtains pretreatment red mud；
2) by gained pretreatment red mud and flyash, expanded perlite (density 70kg/m3, expansion multiple 15), it is viscous Native (plasticity index 18) presses 62:15:3:20 mass ratio is uniformly mixed (200r/min stirs 20min), then is ground (300 mesh powder), screening are ground, up to the unburned red mud porcelain granule mixture.
Unburned red mud porcelain granule mixture obtained by the present embodiment is applied to prepare unburned red mud porcelain granule, and gained is unburned red Mud haydite carries out the performance indicators such as bulk density, compression strength and 1h water absorption rates and measures, its bulk density is 1362kg/ m3, cylindrical compress strength 3.3MPa, 1h water absorption rate are 21.54%, and property indices are excellent.
Specific surface area that the present invention has given full play to red mud is big, alkalescence is strong and has the characteristics that certain gelling, largely makes With red mud, the solid wastes such as resistance to material of giving up, baking-free ceramicite production cost, and gained haydite function admirable are effectively reduced, available for gardens Greening.
Embodiment 3
A kind of unburned red mud porcelain granule mixture, its preparation method comprise the following steps：
1) by red mud naturally dry or using drying machine drying, it is 15wt% to control its moisture content；Then magnetic separation choosing is carried out Iron, controls it to Fe2O3Mass fraction is 8.5%, and carries out dealkalize processing, makes the pH=9 of red mud, obtains pretreatment red mud；
2) by gained pretreatment red mud and flyash, expanded perlite (density 60kg/m3, expansion multiple 16), it is viscous Native (plasticity index 19) presses 25:25:10:40 mass ratio is uniformly mixed (200r/min stirs 60min), then is ground (250 mesh powder), screening are ground, up to the unburned red mud porcelain granule mixture.
Unburned red mud porcelain granule mixture obtained by the present embodiment is applied to prepare unburned red mud porcelain granule, and gained is unburned red Mud haydite carries out the performance indicators such as bulk density, compression strength and 1h water absorption rates and measures, its bulk density is 1491kg/ m3, cylindrical compress strength 3.9MPa, 1h water absorption rate are 9.53%, and property indices are excellent.
Specific surface area that the present invention has given full play to red mud is big, alkalescence is strong and has the characteristics that certain gelling, largely makes With red mud, the solid wastes such as resistance to material of giving up, baking-free ceramicite production cost, and gained haydite function admirable are effectively reduced, available for sewage Processing.
Embodiment 4
A kind of unburned red mud porcelain granule mixture, its preparation method comprise the following steps：
1) by red mud naturally dry or using drying machine drying, it is 3.5wt% to control its moisture content；Then magnetic separation choosing is carried out Iron, controls it to Fe2O3Mass fraction is 11.5%, and carries out dealkalize processing, makes the pH=9.5 of red mud, obtains pretreatment red mud；
2) by gained pretreatment red mud and flyash, expanded perlite (density 80kg/m3, expansion multiple 12), it is viscous Native (plasticity index 20) presses 50:20:8:22 mass ratio is uniformly mixed (225r/min stirs 50min), then is ground (250 mesh powder), screening are ground, up to the unburned red mud porcelain granule mixture.
Unburned red mud porcelain granule mixture obtained by the present embodiment is applied to prepare unburned red mud porcelain granule, and gained is unburned red Mud haydite carries out the performance indicators such as bulk density, compression strength and 1h water absorption rates and measures, its bulk density is 934kg/m3, Cylindrical compress strength is 4.3MPa, and 1h water absorption rates are 11.48%, and property indices are excellent.
Specific surface area that the present invention has given full play to red mud is big, alkalescence is strong and has the characteristics that certain gelling, largely makes With red mud, the solid wastes such as resistance to material of giving up, baking-free ceramicite production cost, and gained haydite function admirable are effectively reduced, available for sponge Urban afforestation.
The above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to preferred embodiment to this hair It is bright to be described in detail, it will be understood by those of ordinary skill in the art that, it can modify to technical scheme Or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it should all cover the claim in the present invention Among scope.

Claims (7)

1. a kind of unburned red mud porcelain granule mixture, each component and its shared parts by weight are：Pre-process 25~62 parts of red mud, fine coal 15~25 parts of ash, 3~10 parts of expanded perlite, 20~40 parts of clay.
2. unburned red mud porcelain granule mixture according to claim 1, it is characterised in that it is described pretreatment red mud by red mud according to It is secondary to be dried to mass water content≤15%, iron is selected to Fe2O3Mass fraction≤15%, and carrying out dealkalize processing makes its pH be 8 ~10 form.
3. unburned red mud porcelain granule mixture according to claim 1, it is characterised in that the expanded perlite is precious for expansion Pearl rock sand, its density are less than 100kg/m3, expansion multiple is more than 10.
4. unburned red mud porcelain granule mixture according to claim 1, it is characterised in that the clay is waste and old clayey Refractory material by sorting, it is broken after gained powder body material, its plasticity index is more than 17.
5. the preparation method of any one of Claims 1 to 4 unburned red mud porcelain granule mixture, it is characterised in that including as follows Step：Each raw material is weighed by proportioning, parts by weight shared by each raw material are：Pre-process 25~62 parts of red mud, 15~25 parts of flyash, 3~10 parts of expanded perlite, 20~40 parts of clay；Each raw material weighed is mixed and stirred for uniformly, then is ground, sieves, Up to the unburned red mud porcelain granule mixture.
6. preparation method according to claim 5, it is characterised in that the mixing speed is 200~250r/min, the time For 20~70min.
7. preparation method according to claim 5, it is characterised in that the grinding technics is to be ground into 150~300 mesh powder End.
CN201711070830.1A 2017-11-03 2017-11-03 A kind of unburned red mud porcelain granule mixture and preparation method thereof Pending CN107902966A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111196713A (en) * 2020-01-09 2020-05-26 中南大学 Method for preparing high-strength support semi-vitrified ceramsite by using low-siliceous red mud raw material
CN111302746A (en) * 2020-02-27 2020-06-19 山东大学 Red mud-based ceramsite concrete and preparation method and application thereof
CN111548039A (en) * 2020-04-22 2020-08-18 深圳大学 Red mud geopolymer aggregate and preparation method thereof
CN114455868A (en) * 2020-11-09 2022-05-10 广东清大同科环保技术有限公司 Red mud baking-free aggregate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101514110A (en) * 2009-03-25 2009-08-26 阮克胜 Red mud and fly ash fireproof insulation brick
CN102336579A (en) * 2010-07-26 2012-02-01 贵州省建筑材料科学研究设计院 Method for producing high-performance haydite from red mud
CN103922670A (en) * 2014-03-28 2014-07-16 贵州中建建筑科研设计院有限公司 Preparation method of unfired haydite by using red mud as active material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101514110A (en) * 2009-03-25 2009-08-26 阮克胜 Red mud and fly ash fireproof insulation brick
CN102336579A (en) * 2010-07-26 2012-02-01 贵州省建筑材料科学研究设计院 Method for producing high-performance haydite from red mud
CN103922670A (en) * 2014-03-28 2014-07-16 贵州中建建筑科研设计院有限公司 Preparation method of unfired haydite by using red mud as active material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111196713A (en) * 2020-01-09 2020-05-26 中南大学 Method for preparing high-strength support semi-vitrified ceramsite by using low-siliceous red mud raw material
CN111302746A (en) * 2020-02-27 2020-06-19 山东大学 Red mud-based ceramsite concrete and preparation method and application thereof
CN111302746B (en) * 2020-02-27 2021-05-11 山东大学 Red mud-based ceramsite concrete and preparation method and application thereof
CN111548039A (en) * 2020-04-22 2020-08-18 深圳大学 Red mud geopolymer aggregate and preparation method thereof
CN111548039B (en) * 2020-04-22 2022-05-27 深圳大学 Red mud geopolymer aggregate and preparation method thereof
CN114455868A (en) * 2020-11-09 2022-05-10 广东清大同科环保技术有限公司 Red mud baking-free aggregate

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