CN105418035B - The method for making cement brick using slurrying alkali collection green mud and boiler ash - Google Patents
The method for making cement brick using slurrying alkali collection green mud and boiler ash Download PDFInfo
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- CN105418035B CN105418035B CN201511009550.0A CN201511009550A CN105418035B CN 105418035 B CN105418035 B CN 105418035B CN 201511009550 A CN201511009550 A CN 201511009550A CN 105418035 B CN105418035 B CN 105418035B
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- green mud
- cement
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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
- C04B28/04—Portland cements
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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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of method that utilization slurrying alkali collection green mud and boiler ash make cement brick, 1) weigh the raw material of following percentage by weight：By green mud 25~30%, boiler ash 18~38%, stone flour 35~55% and cement 1~1.5%, above-mentioned raw materials are mixed, batch mixing is obtained；2) by batch mixing in 40~50MPa forming under the pressure, adobe is obtained；3) adobe is conserved, obtains cement brick.The green mud that the present invention is used, without dropping alkali, greatlys save energy consumption without dehydration, brick making cost is reduced, and green mud incorporation is higher, and cement mixing content is well below conventional levels, salvage value is substantially increased, cement spending has been saved, reduce further brick making cost.
Description
Technical field
The present invention relates to a kind of preparation method of cement brick, and in particular to one kind utilizes slurrying alkali collection green mud and Boiler Ash
The method that slag makes cement brick.
Background technology
In pulping and paper-making production process, various solid wastes can be produced, it is such as mishandling, it will to cause pole to environment
Big pollution.The solid waste lime-ash that mainly green mud and power boiler including alkali collection workshop are produced.During green mud is paper technology
The discarded object produced after caustic room alkali collection, is about 5% or so containing alkali content, predominantly Ca (OH)2And NaOH, moisture content height
Up to 70~80%, even more high, green mud complicated component, main chemical compositions and weight content in green mud butt are respectively：CaO
40~45%, MgO 3.8~4.2%, NaO 5~6%, SiO24~6%, Al2O31.0~2.0%, K2O 0.3~0.6%,
Fe2O30.5~1.0%, loss on ignition is 35~45%.Green mud quality is fine and smooth, and viscosity is big, and granularity is small, and dehydration property is poor, is not easy to
Filter dehydrating operations.Alkali collection causticization output green mud quantity is about 10kg/t slurries, is such as arbitrarily toppled over, other side or landfill can make to environment
Into great harm.Boiler ash includes flyash and clinker, is mainly discharged from pulp and paper making power boiler, its quantity
Fuel used and combustion technology is depended on composition, China's majority pit ash content is higher, the lime-ash that general coal combustion leaves
Content accounts for the 20~35% of coal consumption, wherein 80~90% be flyash, 10~20% be clinker.
Green mud and boiler ash all can as cement brick, concrete material, such as Publication No. CN102627435A invention
Patent discloses a kind of pulping waste residues steam-pressing brisk and preparation method thereof, the steam-pressing brisk be less than with moisture content 2% green mud, aqueous
White clay, flyash, basalt powder, blast-furnace cinder and the Portland cement that rate is less than 2% are raw material, the weight of each raw material
Percentage is：Green mud 10~20%, white clay 5~10%, flyash 15~25%, basalt powder 35~55%, blast-furnace cinder 8
~12%, Portland cement 5%, the steam-pressing brisk compression strength being made is 18.8MPa.The green mud that the steam-pressing brisk is used
Moisture content is less than 2%, and almost dry mud, dehydration difficulty is high, and energy resource consumption is big, in addition, the steam-pressing brisk cement consumption is larger, significantly
Add brick making cost.And for example Publication No. CN102503198A patent of invention discloses concrete compound green mud fine coal
Ash, the compound green mud coal ash be by particle diameter be less than 50mm Black Warrior rubble and moisture content 15~25% wet-discharged coal ash,
Bottom slag and green mud co-grinding to powder fineness are that 45 microns of square hole screens are tailed over less than 15%, are carried out in grinding process at drying
Reason uses milling material moisture content and is less than 0.5%.In terms of butt, each component is respectively by weight percentage：Basalt 30~
75%th, wet-discharged coal ash 10~50%, bottom slag 10~30%, green mud 1~10%.The compound green mud coal ash for concrete is adopted
It is the dry mud of green mud, drying green mud needs to consume the substantial amounts of energy, meanwhile, the consumption of green mud is relatively low, it is impossible to realize waste
At utmost utilize.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind cement is made using slurrying alkali collection green mud with boiler ash
The method of brick, this method is not required to directly utilize green mud progress dewater treatment, and the volume of green mud is larger, can significantly save
About brick making cost.
The technical scheme that the present invention is provided is a kind of method that use slurrying alkali collection green mud makes cement brick with boiler ash,
1) raw material of following percentage by weight is weighed：By green mud 25~30%, boiler ash 18~38%, stone flour 35~
55% and cement 1~2%, above-mentioned raw materials are mixed, batch mixing is obtained；
2) by batch mixing in 40~50MPa forming under the pressure, adobe is obtained；
3) adobe is conserved, obtains cement brick.
After the particles such as green mud and boiler ash, stone flour, cement are mixed, substantial amounts of water is contained in green mud, these water are wrapped in
Little particle surface forms a thin layer of hydration shell, and two have the public moisture film that there is superposition between the little particle of hydration shell, due to
Little particle top layer hydration shell effect so that Al-O keys and Si-O keys are broken, and generate AlO2 -And SiO3 2-Ion, and then formed
The internal layer and the counter-ion layet of electric double layer of little particle electric double layer so that little particle has charging property, absorbability and huge
Surface energy.Each mineralogical composition 3CaOSiO in cement2、2CaO·SiO2、3CaO·Al2O3、4CaO·Al2O3·Fe2O3Rapidly
Occur hydration, generation gelinite and Ca (OH) with little particle top layer moisture film2, Ca (OH)2The Ca of dissociation2+And immediately with small
The ion of grain top layer counter-ion layet carries out alkali exchange, changes short grained electric potential, forms agglomerate small one by one,
Promote SiO contained in agglomerate2、Al2O3、Fe2O3Lateral reactivity Deng oxide is played, and is continued and hydrolysis product of cement
Ca(OH)2Reaction generation hydrated calcium silicate, drated calcium aluminate and hydrated calcium ferrite, produce consolidation strength.Due to containing in green mud
There is a certain amount of Ca (OH)2The Ca of dissociation2+Alkali can be carried out with the ion of little particle top layer counter-ion layet to exchange, form cohesion
Body, and promote the SiO in agglomerate2、Al2O3、Fe2O3Lateral reactivity Deng oxide is played, and is continued and the Ca in green mud
(OH)2Reaction generation aquation agglomerate, can not only greatly enhance the intensity of product brick, the consumption of cement is also greatly decreased.With
The synchronous progress of hydrated cementitious and alkali exchange interaction, hyrate just generates between moisture film and gradually finishes water consumption,
The gelinite of generation and complete or incomplete crystal, have promoted the development of cement umburned brick intensity.
CaO content is high in green mud, SiO in flyash2、Al2O3Content is higher, CaO and SiO2、Al2O3Both compoundings, so that
Batch mixing is set to reach appropriate alkali coefficient and vivacity, so as to greatly strengthen the intensity of finished bricks.
The moisture content of above-mentioned green mud is NaOH and Ca (OH) in 70~80%, green mud2Weight content be 4~5%.
Further, NaOH and Ca (OH) in green mud2Weight compare 1：2~3, this proportioning may be such that in batch mixing have enough
Ca (OH)2With enough Ca2+, it is ensured that comprehensive progress of hydration and alkali exchange interaction, improves the intensity of finished bricks.
The content of flyash is 80~90% in above-mentioned boiler ash, and cinders content is 10~20%.
Further, the content of flyash is 85~90% in boiler ash, and cinders content is 10~15%.
Above-mentioned cement is portland cement.
Compared with prior art, the invention has the advantages that：
1) green mud that the present invention is used without dropping alkali, greatlys save energy consumption, reduces brick making cost without dehydration.
2) green mud incorporation of the invention is higher, and cement mixing content substantially increases waste profit well below conventional levels
With rate, cement spending is saved, brick making cost is reduce further.
3) due in green mud moisture content it is higher, therefore be not required to additionally add water, reduce water consume.
4) the cement brick compression strength that the present invention is made is big, good endurance.
Embodiment
The present invention is further elaborated for specific examples below, but not as a limitation of the invention.
Embodiment 1
1) raw material of following percentage by weight is weighed：By green mud 25%, boiler ash 19%, stone flour 55% and common silicic acid
Salt cement 1%, above-mentioned raw materials are mixed, and obtain batch mixing；
The moisture content of the green mud is NaOH and Ca (OH) in 70%, green mud2Weight content be 4%；The Boiler Ash
The content of flyash is 80% in slag, and cinders content is 20%；NaOH and Ca (OH)2Weight compare 2：1.
2) by batch mixing in 40MPa forming under the pressure, adobe is obtained.
3) adobe is subjected to maintenance 28 days, obtains cement brick.
Embodiment 2
1) raw material of following percentage by weight is weighed：By green mud 28%, boiler ash 18%, stone flour 52.8% and ordinary silicon
Acid salt cement 1.2%, above-mentioned raw materials are mixed, and obtain batch mixing；
The moisture content of the green mud is NaOH and Ca (OH) in 80%, green mud2Weight content be 5%；The Boiler Ash
The content of flyash is 90% in slag, and cinders content is 10%；NaOH and Ca (OH)2Weight compare 1：1.
2) by batch mixing in 50MPa forming under the pressure, adobe is obtained.
3) adobe is subjected to maintenance 28 days, obtains cement brick.
Embodiment 3
1) raw material of following percentage by weight is weighed：By green mud 26%, boiler ash 38%, stone flour 35% and common silicic acid
Salt cement 1%, above-mentioned raw materials are mixed, and obtain batch mixing；
The moisture content of the green mud is NaOH and Ca (OH) in 75%, green mud2Weight content be 4.5%；NaOH and Ca
(OH)2Weight compare 1：2.
The content of flyash is 80% in the boiler ash, and cinders content is 20%.
2) by batch mixing in 45MPa forming under the pressure, adobe is obtained.
3) adobe is subjected to maintenance 28 days, obtains cement brick.
Embodiment 4
1) raw material of following percentage by weight is weighed：By green mud 26%, boiler ash 38%, stone flour 35% and common silicic acid
Salt cement 1%, above-mentioned raw materials are mixed, and obtain batch mixing；
The moisture content of the green mud is NaOH and Ca (OH) in 75%, green mud2Weight content be 4.5%；NaOH and Ca
(OH)2Weight compare 1：3.
The content of flyash is 90% in the boiler ash, and cinders content is 10%.
2) by batch mixing in 45MPa forming under the pressure, adobe is obtained.
3) adobe is subjected to maintenance 28 days, obtains cement brick.
Embodiment 5
1) raw material of following percentage by weight is weighed：By green mud 30%, boiler ash 33.5%, stone flour 35% and ordinary silicon
Acid salt cement 1.5%, above-mentioned raw materials are mixed, and obtain batch mixing；
The moisture content of the green mud is NaOH and Ca (OH) in 75%, green mud2Weight content be 4.5%；NaOH and Ca
(OH)2Weight compare 1：2.5.
The content of flyash is 85% in the boiler ash, and cinders content is 15%.
2) by batch mixing in 40MPa forming under the pressure, adobe is obtained.
3) adobe is subjected to maintenance 28 days, obtains cement brick.
Experimental example
1st, the measure of water absorption rate
Respectively from embodiment 1~5 cement brick is made in respectively select 5 pieces (240 × 115 × 53mm of standard size), by every group 5
Block brick body test specimen is as one group, and brick body test specimen is dried to constant weight in an oven first, and oven temperature is at 105~110 DEG C, and the time is
The quality of test specimen is the dry mass m of test specimen after 2h, cooling.By the test specimen top surface after Drying and cooling down, it is put into water tank, water
Face is highly the 1/3 of height of specimen, often by 12h, adds height for 1/3 water of height of specimen until more than summit.Immersion
Test specimen is taken out after 24h, surface of test piece Free water is wiped away, now the quality of test specimen is the mass M after water suction saturation.The water absorption rate of brick
Represented with the average value of 5 sample test results.
ε=(M-m)/m × 100%
| Group | ε (%) |
| Embodiment 1 | 13.12 |
| Embodiment 2 | 13.20 |
| Embodiment 3 | 11.08 |
| Embodiment 4 | 11.13 |
| Embodiment 5 | 11.11 |
2nd, compression strength fcu measure
1 piece (240 × 115 × 53mm of standard size) is respectively selected in the cement brick being made from embodiment 1~5 respectively to be soaked in
In water, it is desirable to which about 2.5mm at the top of test specimen should be higher by by soaking the water surface, and test specimen is removed, wiped by pumping after carrying out saturation, 24h from water
Go the Free water on brick body surface.With reference in GB/T3810.4-1999《The measurement of the modulus of rupture and breakdown strength》, using WE-10A
Type universal hydraulic testing machine is detected to brick body compression strength.
Compression strength is calculated：Fcu=P/A
In formula：Fcu- unconfined compressive strengths, MPa；
P--- failing loads, N；
A--- test specimen compression areas, mm2。
| Group | fcu(MPa) |
| Embodiment 1 | 16.80 |
| Embodiment 2 | 17.20 |
| Embodiment 3 | 19.68 |
| Embodiment 4 | 19.92 |
| Embodiment 5 | 19.89 |
3rd, brick Leaching Heavy Metals are studied
According to《Solid waste Leaching leaching method：Horizontal vibration method》(HJ557-2010) carry out：Respectively from implementation
1 piece (240 × 115 × 53mm of standard size) is respectively selected in the cement brick that example 1~5 is made, is crushed, 0.5mm sieves are crossed, respectively
Centre sample 15g is weighed, is placed in tool lid wide mouth polyethylene bottles, distilled water 150ml is added respectively, it is 1 to make solid-to-liquid ratio:10.
Bottles vertical is fixed on reciprocating oscillator, frequency of oscillation value 110 ± 10 times/min, amplitude 40mm is adjusted, at room temperature
8h is vibrated, 16h is stood, is filtered with middling speed quantitative filter paper, whole leachates are collected ,-Atomic absorption point is cleared up using microwave high pressure
Light photometry determines leachate Cu, Zn, Cr, Cd, Pb, Ni respectively.Testing result is as follows：
Claims (4)
1. the method for cement brick is made with boiler ash using slurrying alkali collection green mud, it is characterised in that：Comprise the following steps：
1) raw material of following percentage by weight is weighed：By green mud 25~30%, boiler ash 18~38%, the and of stone flour 35~55%
Cement 1~1.5%, above-mentioned raw materials are mixed, and obtain batch mixing；The moisture content of the green mud is 70~80%, in green mud NaOH and
Ca(OH)2Weight content be 4~5%, NaOH and Ca (OH)2Weight compare 1：2~3；
2) by batch mixing in 40~50MPa forming under the pressure, adobe is obtained；
3) adobe is conserved, obtains cement brick.
2. utilization slurrying alkali collection green mud according to claim 1 makes the method for cement brick, its feature with boiler ash
It is：The content of flyash is 80~90% in boiler ash, and cinders content is 10~20%.
3. utilization slurrying alkali collection green mud according to claim 2 makes the method for cement brick, its feature with boiler ash
It is：The content of flyash is 85~90% in boiler ash, and cinders content is 10~15%.
4. utilization slurrying alkali collection green mud according to claim 1 makes the method for cement brick, its feature with boiler ash
It is：The cement is portland cement.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106673525A (en) * | 2016-12-30 | 2017-05-17 | 海南金海浆纸业有限公司 | Method for preparing lime sand brick by utilizing green slurrying mud and prepared lime sand brick |
| CN107266108A (en) * | 2017-06-29 | 2017-10-20 | 合肥达户电线电缆科技有限公司 | A kind of air-entrained concrete building block and preparation method thereof |
| CN111439969A (en) * | 2020-04-07 | 2020-07-24 | 亚太森博（山东）浆纸有限公司 | Resource treatment method for green mud of pulp mill |
| CN111439968B (en) * | 2020-04-07 | 2022-02-01 | 亚太森博（山东）浆纸有限公司 | Resourceful treatment method for slurry plant air-floated sludge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439947A (en) * | 2007-11-22 | 2009-05-27 | 黄志鹏 | Aerated concrete building block and manufacturing method thereof |
| CN102503198A (en) * | 2011-11-08 | 2012-06-20 | 海南蓝岛环保产业股份有限公司 | Compound green mud coal ash for concrete |
| CN102627435A (en) * | 2012-04-20 | 2012-08-08 | 海南蓝岛环保产业股份有限公司 | Paper pulp waste residue steam-pressing brick and preparation method thereof |
| CN103011706A (en) * | 2012-12-14 | 2013-04-03 | 海南蓝岛环保产业股份有限公司 | Concrete taking green mud and white mud as admixtures and preparation method for concrete |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439947A (en) * | 2007-11-22 | 2009-05-27 | 黄志鹏 | Aerated concrete building block and manufacturing method thereof |
| CN102503198A (en) * | 2011-11-08 | 2012-06-20 | 海南蓝岛环保产业股份有限公司 | Compound green mud coal ash for concrete |
| CN102627435A (en) * | 2012-04-20 | 2012-08-08 | 海南蓝岛环保产业股份有限公司 | Paper pulp waste residue steam-pressing brick and preparation method thereof |
| CN103011706A (en) * | 2012-12-14 | 2013-04-03 | 海南蓝岛环保产业股份有限公司 | Concrete taking green mud and white mud as admixtures and preparation method for concrete |
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