CN101993252A - Preparation method of coal ash-based sound-absorbing material - Google Patents

Preparation method of coal ash-based sound-absorbing material Download PDF

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Publication number
CN101993252A
CN101993252A CN2010105024644A CN201010502464A CN101993252A CN 101993252 A CN101993252 A CN 101993252A CN 2010105024644 A CN2010105024644 A CN 2010105024644A CN 201010502464 A CN201010502464 A CN 201010502464A CN 101993252 A CN101993252 A CN 101993252A
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sound
absorbing
coal ash
flyash
preparation
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CN2010105024644A
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CN101993252B (en
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张付申
邢明飞
王川
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Research Center for Eco Environmental Sciences of CAS
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Research Center for Eco Environmental Sciences of CAS
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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
    • 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)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a method for preparing a sound-absorbing material by using the coal ash as the main material aiming at the current situation of large coal ash amount, extensive utilization way and serious resource waste in the energy industry of China. The specific process comprises the following steps of: evenly mixing coal ash and a home-manufactured special compound auxiliary and drying, shaping after grinding, and then performing thermal treatment and subsequent processing, wherein the density of the prepared coal ash porous sound-absorbing material is 400kg/m<3> to 600kg/m<3>, the compressive strength is 1.5MPa to 6MPa, and the porosity is 70-80%. The material can be used as the sound-absorbing and sound-insulating panels for high-speed railways, high-speed roads, metro, building walls, and the like, and the sound-absorbing performance of the sound-absorbing material meets the requirement of road sound barrier sound-absorbing materials.

Description

A kind of preparation method of fly ash base sound-absorbing material
Technical field
The present invention relates to the energy industry offal treatment and dispose, the solid waste resource recovery that belongs to environment protection and comprehensive utilization of resources field utilizes new technology, is particularly useful for the environment-friendly type high added value recycling of high siliceous and aluminium solid waste.The sound-absorbing material that makes is mainly used in the usefulness of the sound absorption sound insulation of high-speed railway, motorway, subway, construction wall etc.
Background technology
Sound pollution is polluted with water and atmospheric pollution is called as pollution greatly in the present age three.Along with the develop rapidly of transportation and construction industry, the sound pollution problem is more and more serious, and it not only can influence people's orthobiosis and work, also can bring very big harm to social development.Therefore, sound pollution has become the problem of world today's property and has caused the extensive attention of various countries.For Control of Noise Pollution, porous material has impayable effect.Porous material is to have high porosity and infiltrative material.As filtering material, be widely used in all conglomeraties such as sewage disposal, food and beverage processing, medical and health, environment protection at present; As material of construction, have advantages such as in light weight, heat insulating, sound insulation, transport easy to usely, and can replace traditional material of construction, therefore, porous material has very application prospects.
Flyash is a large amount of industrial solid castoffs that produce of energy industry, mainly result from each large-size thermal power plant and chemical plant, it is the mixture that the oxide compound after the inorganic mineral fusion and silicate minerals are formed in the coal, and thing mainly is vitreum mutually, and essential mineral has mullite, quartz.The main chemical compositions of flyash is SiO 2And Al 2O 3, also contain a spot of Fe 2O 3, CaO, MgO and uncompleted burned carbon etc.At present, flyash be applied to building materials, built the road, various fields such as backfill, environmental protection, high performance ceramic material.But because the place of production difference of raw coal, its composition varies, and causes portion's fine coal ash composition of the same type difference bigger, and current various fields is to be that raw material directly utilizes with former ash to the utilization of coal ash mode, causes the wasting of resources.Therefore, exploitation is of great practical significance at dissimilar utilization of coal ash modes.
Summary of the invention
The present invention is directed to present China energy industry flyash generation big, utilize that mode is extensive, the wasting of resources outstanding, the serious present situation of environmental hazard, with flyash is main raw material(s), cooperate and utilize the synthetic pore-forming material of waste to produce sound-absorbing material,--ball milling--shaping-oven dry-thermal treatment-cutting processing operational path of having formulated batching is established and has been optimized batching mode, molding mode, heat treatment mode and the post processing mode that influences quality.Concrete technology comprises: (1) is held concurrently flyash, silica powder, the extraordinary whipping agent of self-control, exciting agent and is dried after caking agent mixes, add below interior ball milling 200 orders of ball mill, proportion scale is (by weight): 50～80 parts in flyash, 5～20 parts of silica powders, hold concurrently 5～20 parts of binding agents (cement) of self-control whipping agent (rice hull ash) 10～20 parts, self-control exciting agent.(2) powder that ball milling is good stirs add 10～15% moisture in stirrer after.(3) powder that stirs is put into the compression moulding of steel die inner machine, forming pressure is 5～10MPa.(4) green compact of forming are put into retort furnace and fire, pre-heating stage:, remove the moisture in the green compact 105 ℃ of oven dry 30 minutes; Temperature rise period: be warmed up to 1080～1100 ℃ in 60～90 minutes, and under firing temperature, be incubated 10～30 minutes; Temperature-fall period: burn till porous material and behind stove internal cooling to 500 ℃, in retort furnace, take out naturally cooling.(5) porous material after the annealing is cut into certain size as required.
The flyash porous material density of preparation is 400kg/m 3～600kg/m 3, ultimate compression strength is 1.5MPa～6.0MPa, porosity is 70%～80%; 125Hz low frequency absorption coefficient is greater than 0.34, and average sound absorption coefficient meets " the road sound-screen is learned design specifications " requirement to the road noise barrier sound-absorbing material greater than 0.5.Further set forth content of the present invention below in conjunction with Figure of description and embodiment.
Description of drawings
Fig. 1 is a fly ash base sound-absorbing material synthetic process flow sheet.
Fig. 2 is the photo in kind of fly ash base sound-absorbing material.
Embodiment
The invention will be further described for embodiment plan given below; but can not be interpreted as it is limiting the scope of the invention; the person skilled in art to some nonessential improvement and adjustment that the present invention makes, still belongs to protection scope of the present invention according to the content of the invention described above.
Embodiment 1:
By shown in Figure 1, with flyash, silica powder, extraordinary whipping agent and exciting agent oven dry, press massfraction with 50% flyash, 20% silica powder, 20% whipping agent are in 10% the exciting agent adding ball mill, below ball milling to 200 order; The powder that ball milling is good adds 10% moisture and stirs in stirrer; The powder that stirs is put into the compression moulding of steel die inner machine, and forming pressure is 10MPa; The green compact of forming are put into retort furnace to be fired.105 ℃ of oven dry 30 minutes, be heated to 800 ℃ with 17.4 ℃/minute speed from 105 ℃ then, be warmed up to 1080 ℃ of insulations 20 minutes with 9.5 ℃/minute speed again, treat in retort furnace, to take out naturally cooling after furnace temperature is reduced to 500 ℃.Cooled porous material is cut into desired size as required.The photo of the flyash sound-absorbing porous material material of preparation is seen Fig. 2, and the density of sound-absorbing material is 450kg/m 3, ultimate compression strength is 1.5MPa, porosity is 78%.
Embodiment 2:
With flyash, whipping agent and exciting agent oven dry, press massfraction with 70% flyash, 20% rice hull ash, 10% cement adds below interior ball milling 200 orders of ball mill; The powder that ball milling is good adds 10% moisture and stirs in stirrer; The powder that stirs is put into the compression moulding of steel die inner machine, and forming pressure is 10MPa; The green compact of forming are put into retort furnace to be fired.105 ℃ of oven dry 30 minutes, be heated to 800 ℃ with 17.4 ℃/minute speed from 105 ℃ then, be warmed up to 1090 ℃ of insulations 20 minutes with 9.5 ℃/minute speed again, in retort furnace, take out naturally cooling after waiting furnace temperature to reduce to 500 ℃ then.Cooled porous material is cut into desired size as required.The flyash porous material density of preparation is 400kg/m 3, ultimate compression strength is 6MPa, porosity is 80%.
Embodiment 3:
Concrete technology comprises: (1) is held concurrently flyash, silica powder, the extraordinary whipping agent of self-control, exciting agent and is dried after caking agent mixes, add below interior ball milling 200 orders of ball mill, proportion scale is (by weight): flyash 50kg, silica powder 5kg, self-control whipping agent 10kg, the self-control exciting agent binding agent 10kg that holds concurrently.(2) powder that ball milling is good stirs add 10% moisture in stirrer after.(3) powder that stirs is put into the compression moulding of steel die inner machine, forming pressure is 5MPa.(4) green compact of forming are put into retort furnace and fire, pre-heating stage:, remove the moisture in the green compact 105 ℃ of oven dry 30 minutes; Temperature rise period: be warmed up to 1080 ℃ in 60 minutes, and under firing temperature, be incubated 30 minutes; Temperature-fall period: burn till porous material and behind stove internal cooling to 500 ℃, in retort furnace, take out naturally cooling.(5) porous material after the annealing is cut into certain size as required.
Embodiment 4:
Concrete technology comprises: (1) is held concurrently flyash, silica powder, the extraordinary whipping agent of self-control, exciting agent and is dried after caking agent mixes, add below interior ball milling 200 orders of ball mill, proportion scale is (by weight): flyash 80kg, silica powder 20kg, self-control whipping agent 20kg, the self-control exciting agent binding agent 20kg that holds concurrently.(2) powder that ball milling is good stirs add 15% moisture in stirrer after.(3) powder that stirs is put into the compression moulding of steel die inner machine, forming pressure is 10MPa.(4) green compact of forming are put into retort furnace and fire, pre-heating stage:, remove the moisture in the green compact 105 ℃ of oven dry 30 minutes; Temperature rise period: be warmed up to 1100 ℃ in 90 minutes, and under firing temperature, be incubated 10 minutes; Temperature-fall period: burn till porous material and behind stove internal cooling to 500 ℃, in retort furnace, take out naturally cooling.(5) porous material after the annealing is cut into certain size as required.
Embodiment 5:
Concrete technology comprises: (1) is held concurrently flyash, silica powder, the extraordinary whipping agent of self-control, exciting agent and is dried after caking agent mixes, add below interior ball milling 200 orders of ball mill, proportion scale is (by weight): flyash 70kg, silica powder 10kg, self-control whipping agent (rice hull ash) 18kg, self-control exciting agent binding agent (cement) 15kg that holds concurrently.(2) powder that ball milling is good stirs add 12% moisture in stirrer after.(3) powder that stirs is put into the compression moulding of steel die inner machine, forming pressure is 8MPa.(4) green compact of forming are put into retort furnace and fire, pre-heating stage:, remove the moisture in the green compact 105 ℃ of oven dry 30 minutes; Temperature rise period: be warmed up to 1085 ℃ in 80 minutes, and under firing temperature, be incubated 20 minutes; Temperature-fall period: burn till porous material and behind stove internal cooling to 500 ℃, in retort furnace, take out naturally cooling.(5) porous material after the annealing is cut into certain size as required.

Claims (4)

1. the preparation method of a fly ash base sound-absorbing material is characterized in that comprising the following steps:
(a) the extraordinary whipping agent of flyash, silica powder, self-control, exciting agent are held concurrently caking agent mixes the back oven dry, adds the ball mill endosphere and is milled to below 200 orders.
(b) stir after powder that ball milling is good adds a certain amount of moisture in stirrer, put into the compression moulding of steel die inner machine then.
(c) green compact of forming are put into retort furnace and fire, sintering procedure comprises pre-heating stage, temperature rise period, temperature-fall period.
(d) as required the porous material of firing is cut into certain size.
2. according to the preparation method of right 1 described a kind of fly ash base sound-absorbing material, it is characterized in that, the described distribution of step (a) replaces with: flyash, silica powder, the extraordinary whipping agent of self-control, exciting agent are held concurrently dry after caking agent mixes, add below interior ball milling 200 orders of ball mill, proportion scale is (by weight): 50～80 parts in flyash, 5～20 parts of silica powders, self-control whipping agent (rice hull ash) 10～20 parts, hold concurrently 5～20 parts of binding agents (cement) of exciting agent.
3. according to the preparation method of right 1 or 2 described a kind of fly ash base sound-absorbing materials, it is characterized in that, described modulation of step (b) and molding procedure replace with: the powder that ball milling is good stirs add 10～15% moisture in stirrer after, put into the compression moulding of steel die inner machine then, forming pressure is 5～10MPa.
4. according to the preparation method of right 1,2 or 3 described a kind of fly ash base sound-absorbing materials, it is characterized in that, the described heat treatment step of step (c) replaces with: the green compact of forming are put into High Temperature Furnaces Heating Apparatus fire, pre-heating stage: 105 ℃ of oven dry 30 minutes, remove the moisture in the green compact; Temperature rise period: be warmed up to 1080～1100 ℃ in 60～90 minutes, and under firing temperature, be incubated 10～30 minutes; Temperature-fall period: burn till porous material and behind stove internal cooling to 500 ℃, in retort furnace, take out naturally cooling.
CN2010105024644A 2010-10-11 2010-10-11 Preparation method of coal ash-based sound-absorbing material Expired - Fee Related CN101993252B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103232263A (en) * 2013-05-10 2013-08-07 德州先科地质聚合物研究所 Self-insulation building block made of fired fly ash geopolymer and firing process
CN104446626A (en) * 2014-11-28 2015-03-25 中国科学技术大学先进技术研究院 Preparation method of fly ash based porous thermal insulation material with low thermal conductivity
CN108298945A (en) * 2017-09-15 2018-07-20 柳州市柳晶科技股份有限公司 It is a kind of to prepare acoustic material, the method for sound panel and acoustic material, sound panel using Industry Waste ash

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1559958A (en) * 2004-03-02 2005-01-05 梁经法 Method of producing multifunctional inorganism foam material for wall
CN101468897A (en) * 2007-12-28 2009-07-01 刘继武 Inorganic heat preserving and heat insulation material
WO2010010181A1 (en) * 2008-07-24 2010-01-28 Miscanthus-Nawaro-Innovations S.A. Building material with plant additive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1559958A (en) * 2004-03-02 2005-01-05 梁经法 Method of producing multifunctional inorganism foam material for wall
CN101468897A (en) * 2007-12-28 2009-07-01 刘继武 Inorganic heat preserving and heat insulation material
WO2010010181A1 (en) * 2008-07-24 2010-01-28 Miscanthus-Nawaro-Innovations S.A. Building material with plant additive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
石磊等: "粉煤灰在环境保护中的应用", 《中国资源综合利用》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103232263A (en) * 2013-05-10 2013-08-07 德州先科地质聚合物研究所 Self-insulation building block made of fired fly ash geopolymer and firing process
CN104446626A (en) * 2014-11-28 2015-03-25 中国科学技术大学先进技术研究院 Preparation method of fly ash based porous thermal insulation material with low thermal conductivity
CN108298945A (en) * 2017-09-15 2018-07-20 柳州市柳晶科技股份有限公司 It is a kind of to prepare acoustic material, the method for sound panel and acoustic material, sound panel using Industry Waste ash

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