CN102964075A - Production process of compound coal ash applied to cement and concrete - Google Patents

Production process of compound coal ash applied to cement and concrete Download PDF

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CN102964075A
CN102964075A CN201210528642XA CN201210528642A CN102964075A CN 102964075 A CN102964075 A CN 102964075A CN 201210528642X A CN201210528642X A CN 201210528642XA CN 201210528642 A CN201210528642 A CN 201210528642A CN 102964075 A CN102964075 A CN 102964075A
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slag
flyash
concrete
cement
coal ash
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CN102964075B (en
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黄凌
吴成菊
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Huang Ling
Wu Chengju
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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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Abstract

The invention discloses a production process of compound coal ash applied to cement and concrete, which relates to an auxiliary material for buildings. The compound coal ash comprises the following components in percentage by weight: 30% of yellow phosphorus slag, 10% of slag, 40% of Panzhihua coal ash and 20% of microelement slag. The production process comprises the steps of taking Panzhihua coal ash, mixing the components in proportion, and levigating the components, thus obtaining the compound first-grade coal ash. Compared with the prior art, the compound first-grade coal ash produced by the production process has a low water content ratio as well as low moisture content and ignition loss.

Description

The production technique that is used for the composite fly ash of cement and concrete
Technical field
The present invention relates to the auxiliary materials of a kind of building, particularly a kind of production technique of the composite fly ash for cement and concrete.
Background technology
Flyash is to receive the thin ash catch the flue gas behind coal combustion, and the main solid waste that the coal-burning power plant discharges is received the flue gas behind coal combustion and caught the thin ash that gets off and be called flyash.The combustion processes of flyash: coal dust is the suspended state burning in burner hearth, the most combustiblematerialss in the fire coal can both burnout in stove, and the incombustible substance in the coal dust (being mainly ash content) is mingled in the high-temperature flue gas in a large number.These incombustible substance are because being subject to the high temperature action partial melting, simultaneously because its capillary effect forms a large amount of tiny spheroidal particle.Under the air-extraction function of boiler tail induced draft fan, contain the flue gas flow direction stove tail of a large amount of ash contents.Along with the reduction of flue-gas temperature, the particulate of a part of melting is the vitreum state because of the chilling that is subject to a certain degree, thereby has higher lateral reactivity.Before induced draft fan enters atmosphere with flue gas, above-mentioned these tiny spheroidal particle, through fly-ash separator, separated, collection is flyash.
Flyash is one of larger industrial residue of the current discharge capacity of China, and along with the development of power industry, the flyash quantity discharged of coal-burning power plant increases year by year.A large amount of flyash does not add processing, will produce airborne dust, atmosphere pollution; Can cause the river to silt up if enter water system, and toxic chemical substance wherein also can work the mischief to human body and biology.But entirely turn waste into wealth through reasonably just fully utilizing, adding coal ash has been saved a large amount of cement and fine aggregate in concrete; Reduced water consumption; Improved the workability of mixing concrete thing; Strengthen concrete pumpability; Reduced creep of concrete; Reduce hydration heat, heat energy swelling property; Improve concrete impervious ability; Increase concrete modified.The guiding theory that flyash is administered has been the comprehensive regulation, recycling from the simple environment angle change in past; The approach of total utilization of PCA is with outside the application of the aspects such as the roadbed in past, embankment, concrete admixture, soil transformation, develops into present in advanced approach that utilizes such as cement raw material, cement mixture, Large Hydro-Junction engineering, pump concrete, mass concrete goods, senior fillers.
But, directly flyash being used for cement and concrete, its water demand ratio is 110, fineness is that 45 microns square hole sieves 50.5 and loss on ignition LOSS are 10.00.
Summary of the invention
Purpose of the present invention just is to provide a kind of production technique of the composite fly ash for cement and concrete, should be used for compound 1 grade of flyash that production technique of the composite fly ash of cement and concrete produces and be used for cement and concrete production, water demand ratio is low, water content and loss on ignition are all low.
Technical scheme of the present invention is: a kind of production technique of the composite fly ash for cement and concrete, and the production technique that should be used for the composite fly ash of cement and concrete may further comprise the steps:
A) get Flos Bombacis Malabarici flyash;
B) Phosphorus Slag 30%, slag 10%, Flos Bombacis Malabarici flyash 40% micro-slag 20% are mixed in proportion, described ratio is weight percentage;
C) levigate;
D) get compound 1 grade of flyash;
Described Flos Bombacis Malabarici flyash is comprised of flying dust and furnace bottom ash, and the composition weight ratio is flying dust: furnace bottom ash=80～90:10～20; Described flying dust contains SiO 2, Al 2O 3, Fe 2O 3, LOSS, MgO and SO 3, described SiO 2: Al 2O 3: Fe 2O 3: LOSS:MgO:SO 3Weight ratio is 47.31-50.00:19.72-22.00:5.00-6.00:10.00-18.00:3.34-4.96: 1.12-2.50, and 0.045 micron square hole sieve fineness of described flying dust 10.4-24.00, water content 0.6-1.0, need water compare 115-120; Described furnace bottom ash contains SiO 2, Al 2O 3, Fe 2O 3, MgO and SO 3, described SiO 2: Al 2O 3: Fe 2O 3: LOSS:MgO:SO 3Weight ratio is 46.41-57.21:19.00-22.00:5.32-6.00:7.0-16.91:3.34-4.96:0. 56-1.0, and 0.045 micron square hole sieve fineness of described furnace bottom ash about 80, need water are than about 108;
Described micro-slag is metallurgical slag, alkaline industrial waste water, calcium oxide slag.
Compared with prior art, beneficial effect of the present invention is: the compound 1 grade of flyash that adopts production technique of the present invention to produce, its fineness is even, be used for cement and concrete production, water demand ratio is that 92-94, water content 0.5-1.0, loss on ignition are 3.00-5.00, and intensity increases 5-15MPa on original basis; Concrete homogeneity is: in g/cm3, general aggregate (2.6g/cm3), light skeletal (0.9g/cm3) and heavy aggregate (4.0g/cm3) because of the difference of proportion, reach requirement after mixing with it, difficult control, but can solve preferably this difficult problem after adding 1 grade of composite fly ash.Because many-sided reasons such as the size of sand coarse aggregate ratio, gelling material, water, aggregate cause concrete poor water retention property, concrete delamination, water conservation does not cause workability poor, can solve preferably after adding compound 1 grade of flyash that production technique of the present invention produces.Because the reason of workyard and various raw materials causes concrete delamination, water conservation not, bring difficulty for construction and construction quality, but can greatly improve water-retentivity behind compound 1 grade of flyash that adding production technique of the present invention is produced.
Vocabulary of terms is explained
Phosphorus Slag is among the present invention: Phosphorus Slag be in the industrial production by Rock Phosphate (72Min BPL), silica, coke electric furnace distillation (about 1400 ℃) obtain when producing yellow phosphorus take Calucium Silicate powder as main industrial residue.
Slag is among the present invention: the waste residue that coal was discharged from grate furnace and chamber burner bottom in when burning.
Metallurgical slag is among the present invention: the waste residue of discharging during smelt iron.
The calcium oxide slag is among the present invention: the industrial residue of discharging when producing extra large bright and beautiful titanium.
LOSS among the present invention: i.e. loss on ignition refers to the algebraic sum that various chemical reactions increase and reduce in weight in the sample.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
Get 100 kilograms of Flos Bombacis Malabarici flyash, then get Phosphorus Slag, slag and micro-slag and mix (Phosphorus Slag: slag: Flos Bombacis Malabarici flyash: micro-slag weight ratio is 30:10:40:20).With mixture levigate to fineness be 45 microns square hole sieve 7-12, the levigate time is 15 minutes, gets 94 kilograms in compound 1 grade of flyash.
Among the embodiment 1, Flos Bombacis Malabarici flyash is comprised of flying dust and furnace bottom ash, and the composition weight ratio is flying dust: furnace bottom ash=80～90:10～20; Described flying dust contains SiO 2, Al 2O 3, Fe 2O 3, LOSS, MgO and SO 3, described SiO 2: Al 2O 3: Fe 2O 3: LOSS:MgO:SO 3Weight ratio is 47.31-50.00:19.72-22.00:5.00-6.00:10.00-18.00:3.34-4.96: 1.12-2.50, and 0.045 micron square hole sieve fineness of described flying dust 10.4-24.00, water content 0.6-1.50, need water compare 115-120; Described furnace bottom ash contains SiO 2, Al 2O 3, Fe 2O 3, LOSS, MgO and SO 3, described SiO 2: Al 2O 3: Fe 2O 3: LOSS:MgO:SO 3Weight ratio is 46.41-57.21:19.00-22.00:5.32-6.00:7.0-16.91:3.34-4.96:0. 56-1.50, and 0.045 micron square hole sieve fineness of described furnace bottom ash about 80, need water are than about 108;
Among the embodiment 1, micro-slag is metallurgical slag, alkaline industrial waste water, calcium oxide slag.
Compound 1 grade of flyash of gained among the embodiment 1 is detected with the GB/1596-200 standard, and water demand ratio is surveyed instrument with cement mortar mixer and degree of mobilization and is detected; Fineness detects with fineness of materials negative pressure screen analyzer; Loss on ignition detects with the muffle furnace of 950-1000 ℃ of energy constant temperature; Water content detects with the baking oven of 105 ± 5 ℃ of energy constant temperature; Sulphur trioxide detects with the muffle furnace of 800 ℃ of energy constant temperature; The calcium oxide of wandering about as a refugee detects with test solution; Stability detects with the Lei Shi folder, and the intensity activity index detects with Cement Intensity of Breaking Tester and water pressure resisting machine.Detect to such an extent that its performance perameter is as follows:
Figure 809912DEST_PATH_IMAGE002
Embodiment 2
Get 100 kilograms of Flos Bombacis Malabarici flyash, (Phosphorus Slag: slag: Flos Bombacis Malabarici flyash: micro-slag weight ratio is 30: 10:45:15) then to get Phosphorus Slag, slag and the mixing of micro-slag.Mixture is levigate; Get 95 kilograms of compound 1 grade of flyash.
Compound 1 grade of flyash of gained among the embodiment 2 is detected with the GB/1596-2005 standard, and water demand ratio detects with cement mortar mixer and fluidity tester, and loss on ignition detects with the muffle furnace of temperature at 950-1000 ℃; Sulphur trioxide detects with the muffle furnace of constant temperature at 800 ℃; Water content detects with the baking oven of 105 ± 5 ℃ of the permanent degree of energy; Free calcium oxide detects with test solution; Stability detects with the Lei Shi folder, and the intensity activity index detects with Cement Intensity of Breaking Tester and cement pressure resisting machine; Fineness detects with fineness of materials negative pressure screen analyzer.The result is as follows:
Figure 990227DEST_PATH_IMAGE004
Embodiment 3
Get 100 kilograms of Flos Bombacis Malabarici flyash, (Phosphorus Slag: slag: Flos Bombacis Malabarici flyash: micro-slag weight ratio is 20: 15:40:25) then to get Phosphorus Slag, slag and the mixing of micro-slag.Mixture is levigate; Get 95 public compound 1 grade of flyash.
Among the embodiment 3, micro-slag is metallurgical slag, alkaline industrial waste water, calcium oxide slag.
Compound 1 grade of flyash of gained among the embodiment 3 is detected with the GB/1596-2005 standard, and water demand ratio detects with cement mortar mixer and fluidity tester, and loss on ignition detects with the muffle furnace of temperature at 950-1000 ℃; Sulphur trioxide detects with the muffle furnace of constant temperature at 800 ℃; Water content detects with the baking oven of 105 ± 5 ℃ of the permanent degree of energy; Free calcium oxide detects with test solution; Stability detects with the Lei Shi folder, and the intensity activity index detects with Cement Intensity of Breaking Tester and cement pressure resisting machine; Fineness detects with fineness of materials negative pressure screen analyzer.Detected result is as follows:
Figure 682239DEST_PATH_IMAGE006

Claims (1)

1. production technique that is used for the composite fly ash of cement and concrete is characterized in that this production technique that is used for the composite fly ash of cement and concrete may further comprise the steps:
A) get Flos Bombacis Malabarici flyash;
B) Phosphorus Slag 30%, slag 10%, Flos Bombacis Malabarici flyash 40%, micro-slag 20% are mixed in proportion, described ratio is weight percentage;
C) levigate;
D) get compound 1 grade of flyash;
Described Flos Bombacis Malabarici flyash is comprised of flying dust and furnace bottom ash, and the composition weight ratio is flying dust: furnace bottom ash=80～90:10～20; Described flying dust contains SiO 2, Al 2O 3, Fe 2O 3, LOSS, MgO and SO 3, described SiO 2: Al 2O 3: Fe 2O 3: LOSS:MgO:SO 3Weight ratio is 47.31-50.00:19.72-22.00:5.00-6.00:10.00-18.00:3.34-4.96: 1.12-2.50, and 0.045 micron square hole sieve fineness of described flying dust 10.4-24.00, water content 0.6-1.50, need water compare 115-120; Described furnace bottom ash contains SiO 2, Al 2O 3, Fe 2O 3, LOSS, MgO and SO 3, described SiO 2: Al 2O 3: Fe 2O 3: LOSS:MgO:SO 3Weight ratio is 46.41-57.21:19.00-22.00:5.32-6.00:7.0-16.91:3.34-4.96:0. 56-1.50, and 0.045 micron square hole sieve fineness 80 of described furnace bottom ash, need water are than 108;
Described micro-slag is metallurgical slag, alkaline industrial waste water, calcium oxide slag.
CN201210528642.XA 2012-12-11 2012-12-11 Production process of compound coal ash applied to cement and concrete Expired - Fee Related CN102964075B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103936317A (en) * 2014-04-03 2014-07-23 郧县成林工贸有限责任公司 Special composite fly ash for concrete and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1439613A (en) * 2002-02-19 2003-09-03 昆明市生威混凝土外加剂有限责任公司 High performance mineral concrete additive
CN101870565A (en) * 2010-07-14 2010-10-27 岳阳华泰资源开发利用有限责任公司 Concrete compounded mineral admixture and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1439613A (en) * 2002-02-19 2003-09-03 昆明市生威混凝土外加剂有限责任公司 High performance mineral concrete additive
CN101870565A (en) * 2010-07-14 2010-10-27 岳阳华泰资源开发利用有限责任公司 Concrete compounded mineral admixture and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103936317A (en) * 2014-04-03 2014-07-23 郧县成林工贸有限责任公司 Special composite fly ash for concrete and preparation method thereof
CN103936317B (en) * 2014-04-03 2016-08-24 郧县成林工贸有限责任公司 Special composite fly ash for concrete and preparation method thereof

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