CN107986691A - The technique that red mud slag prepares vapour barrier - Google Patents

The technique that red mud slag prepares vapour barrier Download PDF

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Publication number
CN107986691A
CN107986691A CN201711268806.9A CN201711268806A CN107986691A CN 107986691 A CN107986691 A CN 107986691A CN 201711268806 A CN201711268806 A CN 201711268806A CN 107986691 A CN107986691 A CN 107986691A
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CN
China
Prior art keywords
red mud
defoamer
vapour barrier
mud slag
technique
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
Application number
CN201711268806.9A
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Chinese (zh)
Inventor
张付申
苏屹
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Research Center for Eco Environmental Sciences of CAS
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Research Center for Eco Environmental Sciences of CAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Research Center for Eco Environmental Sciences of CAS filed Critical Research Center for Eco Environmental Sciences of CAS
Priority to CN201711268806.9A priority Critical patent/CN107986691A/en
Publication of CN107986691A publication Critical patent/CN107986691A/en
Pending legal-status Critical Current

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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
    • 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
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • 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
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
    • 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
    • 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)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The present invention is using the slag after red mud extracting metals as main raw material(s), coordinate and utilize polymer emulsion modified cement material, a kind of easy to operate, of low cost, significant effect, environmentally protective vapour barrier preparation method are established, specifically includes crushing and screening, dispensing modulation, the several processes of homogenate spraying.The product stability of production is good, environment-protecting and non-poisonous, environmental suitability is strong, is easy to construct in practical operation, prevents the fields such as spontaneous combustion of coal seam, freezer construction, heat-preserving wall structure from having broad application prospects in colliery.

Description

The technique that red mud slag prepares vapour barrier
Technical field
The present invention relates to a kind of method that vapour barrier is prepared using red mud slag, belongs to environmental protection and resource comprehensive profit New technology is handled with the solid waste in field, is particularly suitable for the ring of waste residue after the secondary extracting metals of metallurgy of aluminium discarded object Border friendly resource recycling utilizes.
Background technology
Red mud slag is that remaining residue after iron or non-ferrous metal is refined from red mud.With the hair of China's aluminum oxide industry Exhibition, the discharge capacity of China's red mud in 2013 is up to 73,000,000 tons.The air storage of red mud causes serious soil degradation, water ring The environmental problems such as the heavy metal pollution and atmosphere pollution in border.Recycling for red mud is main including two aspects, is on the one hand back Iron, the valuable metal such as aluminium in red mud are received, is used directly as the raw material of construction material.China at present Red mud reuse ratio only has 4%, and there is an urgent need for a kind of recoverying and utilizing method that can largely dissolve red mud.Red mud is recycled by iron The main composition of slag is Si oxide, aluminum oxide and ferriferous oxide afterwards, has certain pozzolanic activity, can be with cement Blending uses, and participates in the hydration reaction of cement.Therefore red mud slag and cement, organic polymer can be coordinated, prepare organic-nothing The trapping fire proofing material of machine component.This method is easy to operate, of low cost, and heavy metal to containing in red mud slag etc. has Evil material has solidification, can reduce environmental risk, be the quite varied technology of an application prospect.Coal-mine fire is harm Keep the safety in production one of five big disasters, the mine about 51.3% of freely burning fire easily occurs for China emphasis colliery, and fire occurs In shortest only 20 days or so of period, have in sum occurs for fire and 90% is just accounted for caused by spontaneous combustion, such as due to Mine Fire Calamity induces the accident such as gas and coal-dust explosion, serious to threaten mining area people's life and property safety, hinders coal industry can Sustainable and healthy development.The safety problem in coal production work how is solved, is coal industry authorities and colliery manager An important topic for needing earnest analytical study to solve.The present invention is using red mud slag as main raw material(s), using polymer breast Liquid is modified cement-based material, establishes a kind of easy to operate, of low cost, significant effect, environmentally protective Industry Waste The method that gurry prepares colliery vapour barrier, the product of production prevent spontaneous combustion, freezer construction, heat-preserving wall structure etc. in colliery Field has broad application prospects.
The content of the invention
The present invention is modified cement-based material using polymer emulsion using red mud slag as main raw material(s), establishes A kind of method that easy to operate, of low cost, significant effect, environmentally protective trade waste prepare vapour barrier, production Product prevented in colliery spontaneous combustion of coal seam, freezer construction, heat-preserving wall structure etc. field have broad application prospects.
The present invention completes according to the following steps：
1. red mud slag is dried, it is spare to cross 80 mesh sieves after crushing；
2. it is 1 in mass ratio by the red mud slag after above-mentioned screening and cement:The ratio of 0.5-1 is mixed evenly, system For into dry powder, individually package spare；
3. during site operation, polymer emulsion and water are first pressed 1：1 ratio after mixing, it is mixed to add defoamer stirring Close uniformly, the dosage of defoamer is the 0.1-0.15% of slurry gross mass, mixed emulsion is made, the polymer emulsion is second Alkene-Vinyl Acetate Copolymer Emulsion, styrene-acrylic emulsion, acrylic emulsion, the one or more in polyvinyl acetate emulsion are mixed Compound, the defoamer are phosphate defoamer, polyethers defoamer, one or more of mixing in organic silicon defoamer Thing；
4. the dry powder prepared in 2 is mixed with the lotion prepared in 3, lotion and dry powder quality ratio are 0.5-0.8：1, then Defoamer is added again, and the dosage of defoamer is the 0.1-0.15% of slurry gross mass, is mixed slowly 1-4 minutes；
5. with flush coater by slurry even application in protection face, coating thickness 2-5mm, such as once spraying fail to reach It is required that thickness, need be sprayed again after 24h.
This method possesses following characteristics：
1 uses red mud slag effectively to dissolve industrial solid castoff for raw material, has good environmental benefit；
2. fire proofing material has good crack penetrating power, the filling crack of degree that can be maximum and hole, reach good Good trapping flameproof effect；
3. coating layer thickness is only 2-5mm, materials are few, and easy construction is of low cost；
4. fire proofing material tensile resistance is good, the deformation in coal seam itself is adapted to, without cracking after curing, durability is good, just Exploitation again in coal seam；
With reference to Figure of description and the embodiment content that the present invention is further explained.
Brief description of the drawings
To further appreciate that the present invention, the specific shape characteristic of present invention process flow and material is described with attached drawing below.
Fig. 1 is the process flow chart that red mud slag prepares vapour barrier.
Fig. 2 is the apparent form photo of red mud slag vapour barrier.(a) pictorial diagram of sample；(b) scanning electron microscope of sample Figure.
Embodiment
Example given below is intended making the present invention 3 further explanations, but is not to be construed as protecting model to the present invention The limitation enclosed, some nonessential modifications and adaptations that person skilled in art makes the present invention according to the above, still So belong to protection scope of the present invention.
Embodiment 1：
Red mud slag prepares the technique of vapour barrier, specifically includes the following steps：
According to Fig. 1 flow charts, using red mud slag as raw material, it is spare that 80 mesh sieves are crossed after suitably crushing.By red mud slag With cement in mass ratio 1:0.5 ratio is mixed evenly, and is prepared into dry powder.Again by polymer emulsion, suitable water, defoaming Agent is mixed evenly.According to lotion and dry powder quality 0.7：Dry powder is uniformly mixed by 1 ratio with lotion, and second of addition disappears Infusion, and mix slowly 1 minute i.e. sprayable, coating thickness 2mm.Test the gas permeability coefficient of vapour barrier for 3.12 × 10-7m2/ s, no processing tensile strength is 2.14MPa, and elongation at break 48.90%, its intensity meets GB/T 23445-2009 The requirement of middle type III coating.The fire proofing material obtained cures the smooth free from flaw of rear surface (Fig. 2 (a)), its microstructure is tight Close, (Fig. 2 (b)), has good trapping effect.
Embodiment 2：
According to Fig. 1 flow charts, using red mud slag as raw material, it is spare that 80 mesh sieves are crossed after suitably crushing.By red mud slag With cement in mass ratio 1:1 ratio is mixed evenly, and is prepared into dry powder.Again by polymer emulsion, suitable water, defoamer It is mixed evenly.According to lotion and dry powder quality 0.6：Dry powder is uniformly mixed by 1 ratio with lotion, second of addition defoaming Agent, and mix slowly 1 minute i.e. sprayable, coating thickness 2mm.Test the gas permeability coefficient of vapour barrier for 1.28 × 10-7m2/ s, no processing tensile strength is 1.93MPa, and elongation at break 39.53%, intensity meets in GB/T 23445-2009 The requirement of type III coating.The fire proofing material obtained cures the smooth free from flaw of rear surface, its microstructure is close, has good Trapping flameproof effect.
In examples detailed above, raw material can be but be not limited only to red mud slag, and other industrial solid castoffs equally can be real Apply.The invention is not restricted to above-described embodiment, the content of the invention can be implemented, and have good effect.

Claims (4)

1. red mud slag prepares the technique of vapour barrier, the following steps are specifically included：
(1) by red mud slag it is dry, it is broken after cross 80 mesh sieves, be then 1 in mass ratio with cement:The ratio mixing of 0.5-1, is stirred Mix uniformly, be prepared into dry powder；
(2) polymer emulsion and water are pressed 1：1 ratio after mixing, adds defoamer and is uniformly mixed, defoamer Dosage is the 0.10-0.15% of slurry gross mass, and mixed emulsion is made；
(3) dry powder prepared in (1) is mixed with the lotion prepared in (2), lotion and dry powder quality ratio are 0.5-0.8：1, so Add defoamer again afterwards, the dosage of defoamer is the 0.10-0.15% of slurry gross mass, mixes slowly 1-5 minutes, slurry is made Material；
(4) with flush coater by slurry even application in (3) in protection face, coating thickness be 2-5 millimeter, such as once spray fail Reach the thickness of requirement, need to be sprayed again.
2. red mud slag according to claim 1 prepares the technique of vapour barrier, it is characterized in that：Described in step (2) Polymer emulsion is ethylene-vinyl acetate copolymer lotion, in styrene-acrylic emulsion, acrylic emulsion, polyvinyl acetate emulsion One or more of mixtures, the defoamer is phosphate defoamer.
3. red mud slag according to claim 1 prepares the technique of vapour barrier, it is characterized in that：Described in step (3) Defoamer is one or both of polyethers defoamer, organic silicon defoamer mixture.
4. red mud slag according to claim 1 prepares the technique of vapour barrier, it is characterized in that：Described in step (4) Sprayed again, it is necessary to interior implementation when 24-32 is small after being sprayed in last time.
CN201711268806.9A 2017-12-05 2017-12-05 The technique that red mud slag prepares vapour barrier Pending CN107986691A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101759407A (en) * 2009-12-01 2010-06-30 山西大学 Fire retardant coating for underground coal seam of coal mine
CN103159439A (en) * 2011-12-16 2013-06-19 山东固安特工程材料有限公司 Spray-coating sealing material for coal rock mass
CN104046771A (en) * 2014-06-04 2014-09-17 吉林吉恩镍业股份有限公司 Method for producing high-strength and high-flexibility heatproof mineral wool and iron by using red mud

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101759407A (en) * 2009-12-01 2010-06-30 山西大学 Fire retardant coating for underground coal seam of coal mine
CN103159439A (en) * 2011-12-16 2013-06-19 山东固安特工程材料有限公司 Spray-coating sealing material for coal rock mass
CN104046771A (en) * 2014-06-04 2014-09-17 吉林吉恩镍业股份有限公司 Method for producing high-strength and high-flexibility heatproof mineral wool and iron by using red mud

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
张能武等: "《材料员岗位技能必读》", 30 April 2015, 湖南科学技术出版社 *
沈春林等: "《预拌砂浆的生产与施工》", 31 August 2015, 中国建材工业出版社 *

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Application publication date: 20180504