CN110423031A - A kind of method of modifying improving flyash intensity - Google Patents

A kind of method of modifying improving flyash intensity Download PDF

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Publication number
CN110423031A
CN110423031A CN201910778038.4A CN201910778038A CN110423031A CN 110423031 A CN110423031 A CN 110423031A CN 201910778038 A CN201910778038 A CN 201910778038A CN 110423031 A CN110423031 A CN 110423031A
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China
Prior art keywords
flyash
added
modifying
parts
obtains
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CN201910778038.4A
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Chinese (zh)
Inventor
陈剑旋
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Green Wood Industry Co Ltd
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Green Wood Industry Co Ltd
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Priority to CN201910778038.4A priority Critical patent/CN110423031A/en
Publication of CN110423031A publication Critical patent/CN110423031A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02Treatment
    • C04B20/023Chemical treatment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02Treatment
    • C04B20/04Heat treatment
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses it is a kind of improve flyash intensity method of modifying, comprising the following steps: A, first by flyash be added ball mill in ball milling 30-40min, obtain flyash fine powder;B, flyash fine powder is immersed in ethanol solution after 10-15min, is rinsed well with clear water, air-dried;C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined flyash;D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;F, finally modified flyash semi-finished product are added dry in drying box, obtain modified flyash, the method of modifying that the present invention uses is easy to operate, it can be improved the dispersibility and stability of flyash, modified flyash is added in concrete, can be improved the compression strength and tensile strength of concrete.

Description

A kind of method of modifying improving flyash intensity
Technical field
The present invention relates to flyash modified technical field, specially a kind of method of modifying for improving flyash intensity.
Background technique
Flyash is a kind of industrial residue, and China is accumulated over the years stacks total amount up to 1,000,000,000 tons or more, at present to flyash Utilization rate there was only 40% or so, it is most of still to occupy a large amount of soil heaps and store away, polluted environment, destroy the ecological balance. By the further investigation to flyash physicochemical properties, the form and surface texture of particle are similar to active carbon, have compared with Big specific surface area, while there are a large amount of Al, Fe isoreactivity points in flyash, with stronger adsorption capacity
Current flyash modified method has the disadvantage that complex process, higher cost, modified effect are bad, therefore, It is necessary to improve.
Summary of the invention
The purpose of the present invention is to provide a kind of method of modifying for improving flyash intensity, to solve in above-mentioned background technique The problem of proposition.
To achieve the above object, the invention provides the following technical scheme: a kind of method of modifying for improving flyash intensity, packet Include following steps:
A, ball milling 30-40min in ball mill is added in flyash first, obtains flyash fine powder;
B, flyash fine powder is immersed in ethanol solution after 10-15min, is rinsed well with clear water, air-dried;
C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined powder Coal ash;
D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;
E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;
F, finally modified flyash semi-finished product are added in drying box and are dried to get modified flyash is arrived.
Preferably, calcination temperature of calcining furnace is 280-320 DEG C in the step C, calcination time 40min- 50min;Secondary clacining is carried out after calcining furnace is heated up later, calcination temperature is 380-400 DEG C, time 50min-60min;It It is calcined three times after calcining furnace is heated up afterwards, calcination temperature is 430-460 DEG C, time 30min-40min.
Preferably, in the step D modifying agent component include in parts by weight 10-20 parts of water soluble polyalkylene glycol, 4-8 parts of citric acid, 3-9 parts of sodium pyrophosphate, 4-10 parts of laruyl alcohol polyvinylether, fatty alcohol polyoxyethylene ether methyl-monosilane 5-15 Part.
Preferably, stirred tank stirring rate is 300-600 revs/min in the step D, and whipping temp is 60-80 DEG C, stirring Time is 12-22min.
Preferably, ultrasonic temperature is 40-50 DEG C in the step E, time 10min-15min.
Compared with prior art, the beneficial effects of the present invention are:
(1) method of modifying that the present invention uses is easy to operate, can be improved the dispersibility and stability of flyash, modified Flyash be added concrete in, can be improved the compression strength and tensile strength of concrete.
(2) in the present invention, calcine by steps is carried out using three kinds of different temperature when calcining, can effectively enhance flyash Toughness and intensity, further improve its mechanical performance.
(3) modifying agent that the present invention uses can effectively improve the performance of flyash, can be improved the early stage of concrete And later strength.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects It encloses.
Embodiment one:
The invention provides the following technical scheme: a kind of method of modifying for improving flyash intensity, the following steps are included:
A, ball milling 30min in ball mill is added in flyash first, obtains flyash fine powder;
B, flyash fine powder is immersed in ethanol solution after 10min, is rinsed well with clear water, air-dried;
C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined powder Coal ash;
D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;
E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;
F, finally modified flyash semi-finished product are added in drying box and are dried to get modified flyash is arrived.
In the present embodiment, calcination temperature of calcining furnace is 280 DEG C in step C, calcination time 40min;It will forge later Secondary clacining is carried out after burning furnace heating, calcination temperature is 380 DEG C, time 50min;It is carried out three times after calcining furnace is heated up later Calcining, calcination temperature are 430 DEG C, time 30min.
In the present embodiment, modifying agent component includes 10 parts of water soluble polyalkylene glycol, lemon in parts by weight in step D Sour 4 parts, 3 parts of sodium pyrophosphate, 4 parts of laruyl alcohol polyvinylether, 5 parts of fatty alcohol polyoxyethylene ether methyl-monosilane.
In the present embodiment, stirred tank stirring rate is 300 revs/min in step D, and whipping temp is 60 DEG C, and mixing time is 12min。
In the present embodiment, ultrasonic temperature is 40 DEG C in step E, time 10min.
Embodiment two:
A kind of method of modifying improving flyash intensity, the following steps are included:
A, ball milling 40min in ball mill is added in flyash first, obtains flyash fine powder;
B, flyash fine powder is immersed in ethanol solution after 15min, is rinsed well with clear water, air-dried;
C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined powder Coal ash;
D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;
E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;
F, finally modified flyash semi-finished product are added in drying box and are dried to get modified flyash is arrived.
In the present embodiment, calcination temperature of calcining furnace is 320 DEG C in step C, calcination time 50min;It will forge later Secondary clacining is carried out after burning furnace heating, calcination temperature is 400 DEG C, time 60min;It is carried out three times after calcining furnace is heated up later Calcining, calcination temperature are 460 DEG C, time 40min.
In the present embodiment, modifying agent component includes 20 parts of water soluble polyalkylene glycol, lemon in parts by weight in step D Sour 8 parts, 9 parts of sodium pyrophosphate, 10 parts of laruyl alcohol polyvinylether, 15 parts of fatty alcohol polyoxyethylene ether methyl-monosilane.
In the present embodiment, stirred tank stirring rate is 600 revs/min in step D, and whipping temp is 80 DEG C, and mixing time is 22min。
In the present embodiment, ultrasonic temperature is 50 DEG C in step E, time 15min.
Embodiment three:
A kind of method of modifying improving flyash intensity, the following steps are included:
A, ball milling 32min in ball mill is added in flyash first, obtains flyash fine powder;
B, flyash fine powder is immersed in ethanol solution after 11min, is rinsed well with clear water, air-dried;
C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined powder Coal ash;
D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;
E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;
F, finally modified flyash semi-finished product are added in drying box and are dried to get modified flyash is arrived.
In the present embodiment, calcination temperature of calcining furnace is 290 DEG C in step C, calcination time 42min;It will forge later Secondary clacining is carried out after burning furnace heating, calcination temperature is 385 DEG C, time 52min;It is carried out three times after calcining furnace is heated up later Calcining, calcination temperature are 440 DEG C, time 32min.
In the present embodiment, modifying agent component includes 12 parts of water soluble polyalkylene glycol, lemon in parts by weight in step D Sour 7 parts, 8 parts of sodium pyrophosphate, 5 parts of laruyl alcohol polyvinylether, 8 parts of fatty alcohol polyoxyethylene ether methyl-monosilane.
In the present embodiment, stirred tank stirring rate is 350 revs/min in step D, and whipping temp is 66 DEG C, and mixing time is 14min。
In the present embodiment, ultrasonic temperature is 44 DEG C in step E, time 12min.
Example IV:
A kind of method of modifying improving flyash intensity, the following steps are included:
A, ball milling 35min in ball mill is added in flyash first, obtains flyash fine powder;
B, flyash fine powder is immersed in ethanol solution after 12min, is rinsed well with clear water, air-dried;
C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined powder Coal ash;
D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;
E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;
F, finally modified flyash semi-finished product are added in drying box and are dried to get modified flyash is arrived.
In the present embodiment, calcination temperature of calcining furnace is 300 DEG C in step C, calcination time 45min;It will forge later Secondary clacining is carried out after burning furnace heating, calcination temperature is 390 DEG C, time 55min;It is carried out three times after calcining furnace is heated up later Calcining, calcination temperature are 445 DEG C, time 35min.
In the present embodiment, modifying agent component includes 15 parts of water soluble polyalkylene glycol, lemon in parts by weight in step D Sour 6 parts, 6 parts of sodium pyrophosphate, 7 parts of laruyl alcohol polyvinylether, 10 parts of fatty alcohol polyoxyethylene ether methyl-monosilane.
In the present embodiment, stirred tank stirring rate is 450 revs/min in step D, and whipping temp is 70 DEG C, and mixing time is 17min。
In the present embodiment, ultrasonic temperature is 45 DEG C in step E, time 12min.
In the present invention, calcine by steps are carried out using three kinds of different temperature when calcining, can effectively enhance flyash Toughness and intensity further improve its mechanical performance;The modifying agent that the present invention uses can effectively improve the property of flyash Can, it can be improved early stage and the later strength of concrete.
In conclusion the method for modifying that the present invention uses is easy to operate, the dispersibility and stability of flyash can be improved, Modified flyash is added in concrete, can be improved the compression strength and tensile strength of concrete.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (5)

1. a kind of method of modifying for improving flyash intensity, it is characterised in that: the following steps are included:
A, ball milling 30-40min in ball mill is added in flyash first, obtains flyash fine powder;
B, flyash fine powder is immersed in ethanol solution after 10-15min, is rinsed well with clear water, air-dried;
C, calcine by steps in calcining furnace is added in the flyash after air-drying, is cooled to room temperature later, obtains calcined flyash;
D, modifying agent is added in flyash after firing, heating stirring in stirred tank is added later, obtains mixture;
E, it feeds the mixture into thermostatic ultrasonic in water-bath to handle, obtains modified flyash semi-finished product;
F, finally modified flyash semi-finished product are added in drying box and are dried to get modified flyash is arrived.
2. a kind of method of modifying for improving flyash intensity according to claim 1, it is characterised in that: in the step C Calcination temperature of calcining furnace is 280-320 DEG C, calcination time 40min-50min;Two are carried out after calcining furnace is heated up later Secondary calcining, calcination temperature are 380-400 DEG C, time 50min-60min;It is calcined three times after calcining furnace is heated up later, Calcination temperature is 430-460 DEG C, time 30min-40min.
3. a kind of method of modifying for improving flyash intensity according to claim 1, it is characterised in that: in the step D Modifying agent component include in parts by weight 10-20 parts of water soluble polyalkylene glycol, 4-8 parts of citric acid, 3-9 parts of sodium pyrophosphate, 4-10 parts of laruyl alcohol polyvinylether, 5-15 parts of fatty alcohol polyoxyethylene ether methyl-monosilane.
4. a kind of method of modifying for improving flyash intensity according to claim 1, it is characterised in that: in the step D Stirred tank stirring rate is 300-600 revs/min, and whipping temp is 60-80 DEG C, mixing time 12-22min.
5. a kind of method of modifying for improving flyash intensity according to claim 1, it is characterised in that: in the step E Ultrasonic temperature is 40-50 DEG C, time 10min-15min.
CN201910778038.4A 2019-08-22 2019-08-22 A kind of method of modifying improving flyash intensity Pending CN110423031A (en)

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CN110950597A (en) * 2019-11-15 2020-04-03 淮南昂瑞新型墙材有限责任公司 Production process of autoclaved aerated concrete brick

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