CN107226676A - A kind of coal slime, coal gangue concrete and its modulator approach - Google Patents
A kind of coal slime, coal gangue concrete and its modulator approach Download PDFInfo
- Publication number
- CN107226676A CN107226676A CN201710454903.0A CN201710454903A CN107226676A CN 107226676 A CN107226676 A CN 107226676A CN 201710454903 A CN201710454903 A CN 201710454903A CN 107226676 A CN107226676 A CN 107226676A
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- CN
- China
- Prior art keywords
- gangue
- coal slime
- coal
- concrete
- magnesia
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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
- C04B28/30—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 magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of coal slime, coal gangue concrete and its modulator approach, including magnesia oxychloride cement, coal slime, gangue, its mixing ratio by weight is water：Magnesium chloride：Light burnt powder：Coal slime：Gangue=1:2:3.5:2.3:5.Water and magnesium chloride are first modulated into dissolving in the ratio in advance during preparation, made after it fully dissolves, is stirred in the ratio and coal slime, then is proportionally added into light burnt powder, gangue and be stirred, concrete is formed.According to the difference of environment temperature during modulation, retarder and coagulant are properly added.The beneficial effects of the invention are as follows：Concrete is made by adding coal slime and gangue inserts in magnesia oxychloride cement, eliminate the pernicious gas such as sulfur dioxide, nitrogen oxides pollution caused by gangue, coal slime spontaneous combustion, gangue and coal slime is set to turn waste into wealth, it can be used as concrete prefabricated element material, gunite material and roof flashing material, reach cost efficiency, the effect of energy-conserving and environment-protective.
Description
Technical field
The present invention relates to a kind of coal slime, coal gangue concrete and its modulator approach, belong to building material field.
Background technology
Gangue is the solid waste during mining and during coal washing, and its main component is Al2O3、SiO2, additionally
There is the Fe that quantity is not waited2O3、CaO、MgO、Na2O、K2O、P2O5、SO3With micro rare element gallium vanadium titanium cobalt etc..
There are many kinds currently for the comprehensive processing method of gangue, various regions are all according to respective particular situation and spy
Point, takes measures with suiting measures to local conditions.As for the utilization of current gangue, there are coal gangue power generation, making coal gangue brick, also gangue
The method of utilization and the comprehensive utilization of more gangues in terms of building trade, ceramic, quickly grows, innovation is not
It is disconnected.But, various regions comprehensively utilize the not perfectly flat weighing apparatus of development of gangue, in the area of energy relative shortage, to the synthesis of gangue
It is very fast using development, and in the area of coal resources relative abundance, the development of comprehensive utilization to gangue is slower, therefore, in coal
The slower area of spoil development of comprehensive utilization, the environmental pollution that gangue is brought is still very serious.Some coal enterprise are so far
Still using the traditional discharge refuse mode of China, gangue is moved at the top of hillock, then toppled over, and its is freely tumbled, it is larger
Spoil block roll down to the bottom of hillock side slope, less spoil block then piles up middle and upper part, makes to form air in hillock and leads to
Road, generates " stack effect ", is that spontaneous combus tion of waste heap creates condition.Topple over when spontaneous combus tion of waste heap, then on the surface of hillock
Loess, carries out covering fire extinguishing, but its effect extreme difference, it is that " chimney " cannot be solved thoroughly to trace it to its cause.
Therefore, the present invention is combined coal slime, gangue with traditional magnesia oxychloride cement, is prepared for a kind of coal slime, gangue
Concrete, is made the good blockwork of seal, and group builds terraced fields barricade, and the pollution-free processing of closed is carried out to hillock, can
Gully is changed into terraced fields, gully-slope land is changed into level land, disposably eliminate sulfur dioxide caused by spontaneous combus tion of waste heap, nitrogen oxides,
The haze such as oxycarbide and flue dust pernicious gas pollutes, and purifies air, economizes the land resource, reach cost efficiency, energy-conserving and environment-protective
Good result.In addition, carrying out the pollution-free processing of closed to townm refuse using coal slime, coal gangue concrete, also it can reach
Same effect.When using coal slime, coal gangue concrete material as roof waterpoof material, emulsified with SBS general at present
Asphalt felt waterproof material is compared, better.Therefore, coal enterprise's spoil is carried out using coal slime, coal gangue concrete material
Mountain closed is pollution-free to be handled, townm refuse closed is pollution-free processing and roof waterproof processing etc., are current optimal materials
One of material selection.
The content of the invention
It is an object of the invention to provide a kind of coal slime, coal gangue concrete, it is characterised in that including magnesia oxychloride cement, coal
Mud, gangue, its mixing ratio by weight are water：Magnesium chloride：Light burnt powder：Coal slime：Gangue=1:2:3.5:2.3:5.
Above-mentioned coal slime, the modulator approach of coal gangue concrete are as follows：Water and magnesium chloride are modulated molten in advance in the ratio
Solution, makes after it fully dissolves, to stir in the ratio and coal slime, then be proportionally added into light burnt powder, gangue progress
Stirring, forms concrete.
In addition, also needing to add additive, including retarder, coagulant, phase structure stabilizer, raising waterproof in modulated process
The additive of performance and distortion preventing.The retarder can be one kind in tertiary sodium phosphate, citric acid, and addition is magnesia
The 1% ~ 2% of effective active content, is used in more than 30 DEG C of environment.The coagulant can be calcium oxide-calcium chloride-nitrous acid
Sodium, its volume be calcium oxide be the 1.5% of magnesia effective active content, 1.5% that calcium chloride is magnesia effective active content,
Natrium nitrosum is the 1% of magnesia effective active content, is used when below 5 DEG C of environment temperature.The phase structure stabilizer can be with
For one kind in phosphate, ferrous aluminate, sulfate, fluosilicate, borate, addition is magnesia effective active content
1%~2%.The additive for improving water resistance can for emulsion type high polymer or curable resin, phosphate, sulfate,
One kind in aluminate, addition is the 1% ~ 2% of magnesia effective active content.The additive of the distortion preventing can be phosphorus
Acid or citric acid, addition are the 1% ~ 2% of magnesia effective active content.
The beneficial effects of the invention are as follows：Concrete is made by adding coal slime and gangue in magnesia oxychloride cement, eliminates
The pernicious gas such as sulfur dioxide, nitrogen oxides, oxycarbide pollution caused by gangue spontaneous combustion, makes gangue and coal slime become useless
For treasured, concrete prefabricated element material, gunite material, townm refuse closed is pollution-free processing material and roof waterproof can be used as
Materials'use, reaches cost efficiency, energy-conserving and environment-protective, the effect economized the land resource.
Embodiment
With reference to specific embodiment, the present invention is further elaborated, but it is only the preferable embodiment party of the present invention
Formula, therefore the equivalence changes that all features and principle according to described in present patent application scope are done, are included in patent of the present invention
In application range.
The coal slime of the present invention, coal gangue concrete, including traditional magnesia oxychloride cement, coal slime and gangue, its weight are matched somebody with somebody
Composition and division in a proportion is water：Magnesium chloride：Light burnt powder：Coal slime：Gangue=1:2:3.5:2.3:5.Its modulator approach is as follows：
（1）By water and magnesium chloride in proportion 1:2 modulation 8 ~ 12h of dissolving, make it fully dissolve；
（2）Above-mentioned solution is added in magnesite special-purpose stirring machine, the coal slime for adding 3.5 parts of ratios is stirred to pasty state；
（3）Light burnt powder, gangue are proportionally added into successively to be stirred, and form concrete.
（4）According to follow-up different purposes such as concrete prefabricated element, roof waterpoof material, fire-proof plate, whitewashing fire extinguishing material
Material etc. carries out production and application from different modes.
Additive in modulated process, will be selected according to different conditions.When such as environment temperature is more than 20 DEG C
1 day intensity of this concrete product is can reach 28 days intensity of normal concrete 40%~50%, when environment temperature 30 DEG C with
When upper, because setting rate is too fast, then needed to add retarding admixtures, such as tertiary sodium phosphate, citric acid additive have slow
Solidifying effect, reduces the freezing rate of concrete, in order to avoid damage equipment；When environment temperature is below 5 DEG C, then rush can be added solidifying
Agent, such as calcium oxide-calcium chloride-natrium nitrosum, its volume are the calcium oxide 1.5% of magnesia effective active content, calcium chloride
1.5%, natrium nitrosum 1% etc. improves concrete production efficiency.It is used as phase structure stabilizer, phosphate, ferrous aluminate, sulfuric acid
Salt, fluosilicate, borate etc. can promote magnesium oxychloride material 5.1.8 phase structures based on foliaceous crystal, increase 5.1.8 phases
The stability of structure, its addition is the 1% ~ 2% of magnesia effective active content.The additive for improving water resistance can be water
One kind in newborn type high polymer or curable resin, phosphate, sulfate, aluminate, can be with the hair of blockage structure after addition
Thin passage, interstitital texture hole, so as to improve the water resistance of material, its addition for magnesia effective active content 1% ~
2%.Concrete highly exothermic can cause volumetric expansion to deform in hardening process, add the distortion preventing such as phosphoric acid or citric acid
The heat of hydration can be reduced after additive, indissoluble salt is generated, it is to avoid local reaction excessive velocities, so as to avoid the change of concrete
Shape, its addition is the 1% ~ 2% of magnesia effective active content.
Coal slime, gangue are not only physics filling in chlorine O-Mg series, and even more activity chemistry is filled.Add containing activity
SiO2Industrial residue gangue after, generate stable indissoluble salt MgSiO3, overcome Mg2+Excessive negative effect, simultaneously
Also there are following functions：（1）Containing active SiO2With pozzolanic action, possess latent hydraulicity, can aquation generation silicate hydrate
Calcium gel, reduces the consumption of gel rubber material；（2）Improve using cement and magnesia oxychloride cement as the product later strength of binder materials,
Suppress alkali-aggregate reaction, to as reinforcing material being highly advantageous with glass fibre；（3）The heat of hydration is reduced, heated volume is reduced
Change, reduce concrete dries contraction；（4）Bleeding and segregation phenomenon are reduced, workability can be improved, with the anti-of increase product
Pressure, bending resistance, tensile strength, put forward high-quality effect.Therefore coal slime, gangue are identical with the effect of flyash in the system,
Physics filling is not only, Cl-O-Mg fault of construction is also changed, improves its function.In addition, concrete material inherits biography
The good characteristic of system magnesia oxychloride cement, such as air-setting, multicomponent, highly exothermic, high intensity, wearability, high temperature resistant low temperature properties, salt resistance
Halogen corrosivity, air stability and weatherability, low alkalinity low-corrosiveness, soon lightweight low-density, solidifying property, good impermeability and light
The features such as pool property, preparation process low energy, nonpoisonous and tasteless use safety, solid waste volume is big and utilization rate is high, can be low
Temperature shaping, the four seasons can all produce.Particularly high temperature resistant low temperature properties（Refractory temperature is more than 300 DEG C, without additional antifreezing agent
Under conditions of, it is resistant to -30 DEG C of low temperature）, high intensity（Compression strength can easily reach more than 62.5MPa）, lightweight low-density
Property, with good impermeability（Seal）The working environment of the closed processes such as coal gangue hill, rubbish is adapted to completely, and is not required to
Will moist maintenance.
Embodiment described above only expresses the embodiment of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.
Claims (8)
1. a kind of coal slime, coal gangue concrete, it is characterised in that including magnesia oxychloride cement, coal slime, gangue, its weight mix
Than for water：Magnesium chloride：Light burnt powder：Coal slime：Gangue=1:2:3.5:2.3:5.
2. a kind of coal slime according to claim 1, the modulator approach of coal gangue concrete, it is characterised in that：By water and chlorine
Change magnesium and modulate dissolving in advance in the ratio, make after it fully dissolves, to stir in the ratio and coal slime, then by than
Example adds light burnt powder, gangue and is stirred, and forms concrete.
3. a kind of coal slime according to claim 2, the modulator approach of coal gangue concrete, it is characterised in that：Modulated process
In also need to add additive, including retarder, coagulant, phase structure stabilizer, improve the additional of water resistance and distortion preventing
Agent.
4. a kind of coal slime according to claim 3, the modulator approach of coal gangue concrete, it is characterised in that：The slow setting
Agent is one kind in tertiary sodium phosphate, citric acid, and addition is the 1% ~ 2% of magnesia effective active content, in more than 30 DEG C of environment
When use.
5. a kind of coal slime according to claim 3, the modulator approach of coal gangue concrete, it is characterised in that：It is described to promote solidifying
Agent is calcium oxide-calcium chloride-natrium nitrosum, and its volume is 1.5% that calcium oxide is magnesia effective active content, and calcium chloride is
The 1.5% of magnesia effective active content, natrium nitrosum is the 1% of magnesia effective active content, when below 5 DEG C of environment temperature
Use.
6. a kind of coal slime according to claim 3, the modulator approach of coal gangue concrete, it is characterised in that：The phase knot
Structure stabilizer is one kind in phosphate, ferrous aluminate, sulfate, fluosilicate, borate, and addition is that magnesia is effectively lived
The 1% ~ 2% of property content.
7. a kind of coal slime according to claim 3, the modulator approach of coal gangue concrete, it is characterised in that：It is described to improve
The additive of water resistance is one kind in emulsion type high polymer or curable resin, phosphate, sulfate, aluminate, is added
Dosage is the 1% ~ 2% of magnesia effective active content.
8. a kind of coal slime according to claim 3, the modulator approach of coal gangue concrete, it is characterised in that：The prevention
The additive of deformation is phosphoric acid or citric acid, and addition is the 1% ~ 2% of magnesia effective active content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710454903.0A CN107226676A (en) | 2017-06-16 | 2017-06-16 | A kind of coal slime, coal gangue concrete and its modulator approach |
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| CN201710454903.0A CN107226676A (en) | 2017-06-16 | 2017-06-16 | A kind of coal slime, coal gangue concrete and its modulator approach |
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| CN107226676A true CN107226676A (en) | 2017-10-03 |
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| CN201710454903.0A Pending CN107226676A (en) | 2017-06-16 | 2017-06-16 | A kind of coal slime, coal gangue concrete and its modulator approach |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111116127A (en) * | 2019-12-09 | 2020-05-08 | 广州科源新材料有限公司 | Light partition board prepared from coal slime slurry and preparation method thereof |
| CN111517704A (en) * | 2020-04-30 | 2020-08-11 | 河南工业和信息化职业学院 | Coal slime-based roadway bottom paving material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058386A (en) * | 1991-04-29 | 1992-02-05 | 茹海龙 | Colour floor brick made of powdered coal ash and coal gangue |
| CN102432266A (en) * | 2011-09-01 | 2012-05-02 | 山发寿 | Manufacture method and application of baking-free coal gangue concrete |
-
2017
- 2017-06-16 CN CN201710454903.0A patent/CN107226676A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058386A (en) * | 1991-04-29 | 1992-02-05 | 茹海龙 | Colour floor brick made of powdered coal ash and coal gangue |
| CN102432266A (en) * | 2011-09-01 | 2012-05-02 | 山发寿 | Manufacture method and application of baking-free coal gangue concrete |
Non-Patent Citations (3)
| Title |
|---|
| 中国菱镁行业协会: "《镁质胶凝材料及制品技术》", 31 January 2016, 北京：中国建材工业出版社 * |
| 张瑞等: "《煤炭矿区循环经济发展模式及评价方法》", 30 April 2016, 吉林出版集团股份有限公司 * |
| 煤炭企业能源管理丛书编委会: "《节能技术》", 30 November 2014, 北京：煤炭工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111116127A (en) * | 2019-12-09 | 2020-05-08 | 广州科源新材料有限公司 | Light partition board prepared from coal slime slurry and preparation method thereof |
| CN111517704A (en) * | 2020-04-30 | 2020-08-11 | 河南工业和信息化职业学院 | Coal slime-based roadway bottom paving material and preparation method thereof |
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Application publication date: 20171003 |