CN1029308C - Sintered ceramic product of whole flyash using "viscous" flyash as adhesive - Google Patents

Sintered ceramic product of whole flyash using "viscous" flyash as adhesive Download PDF

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Publication number
CN1029308C
CN1029308C CN 93112337 CN93112337A CN1029308C CN 1029308 C CN1029308 C CN 1029308C CN 93112337 CN93112337 CN 93112337 CN 93112337 A CN93112337 A CN 93112337A CN 1029308 C CN1029308 C CN 1029308C
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China
Prior art keywords
flyash
fly ash
present
viscous
nonviscous
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Expired - Fee Related
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CN 93112337
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Chinese (zh)
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CN1075310A (en
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陈聘珍
陈彤
陈英
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Individual
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Abstract

The present invention discloses a sinter ceramic product which is wholly made of fly ash (comprising building materials). The present invention comprises the steps that viscous fly ash and nonviscous fly ash are uniformly mixed, and after water is added, when the viscous fly ash and the nonviscous fly ash are mutually combined, active silica and active alumina in the nonviscous fly ash chemically react with calcium hydroxide generated by over-burned lime postponement digestion with high temperature which is higher than 1400 DEG C in the viscous fly ash. After expansion stability and crack resistance are improved, drying and roasting are carried out so as to make finished products. After chemically bond agents, such as organic water glass, etc. which are diluted, such as black liquor, etc. are added, the plasticity and the strength of blanks can be improved. The finished products of the present invention have the advantages of low material cost, little energy consumption, high intensity, light volume weight, little investment, low construction labor strength and the improvement of heat insulation and sound absorbing performance, the present invention can beautify buildings, and the present invention is beneficial for electric power industry and construction industry.

Description

Sintered ceramic product of whole flyash using "viscous" flyash as adhesive
The present invention relates to a kind of flyash sintered ceramic product, particularly use " viscosity " flyash to make the flyash sintered ceramic product of wedding agent.
The flyash of heat power station discharging is stacked the place owing to occupying, contaminated environment becomes big public hazards.Russian patent SU1537-665A, Chinese patent CN87101036 have announced the technical scheme of utilizing fly ash in electric power plant to make ceramic, yet its common ground all needs to add the viscosity earth of suitable part by weight in flyash, and owing to ruin the field and get and cause new public hazards when mud causes solving the fly ash in electric power plant problem of complex utilization.
The purpose of this invention is to provide a kind of usefulness " viscosity " flyash and make the technical scheme of the flyash sintered ceramic product of binding agent, in the hope of thoroughly solving the problem of complex utilization of fly ash in electric power plant.
Why purpose of the present invention can the accomplished inventor of being based on be engaged in the experience that the fly ash in electric power plant comprehensive utilization accumulates for a long time, is found that fly ash in electric power plant can be divided into inviscid and " viscosity " two classes, and the component ratio of inviscid flyash is: SiO 244-59%, Al 2O 314-38%, Fe 2O 34-17%, CaO 2-12%, MgO 0.2-3.6%, the component ratio of " viscosity " flyash is: SiO 27-51%, Al 2O 32-18%, Fe 2O 35-24%, CaO 13-30%, MgO 1-3%." viscosity " flyash with have certain viscosity after water mixes, this might be improved to meeting technological requirement two kinds of plasticity index behind the flyash batch mixing, i.e. plasticity index 〉=7.Yet, owing to CaO, Fe in " viscosity " flyash 2O 3, MgO content higher, Al 2O 3Content on the low side, and according to the requirement of sintered article to material component, Al 2O 3＞10% to guarantee the mechanical strength of goods, Fe 2O 3＜10% in order to avoid reduce firing range and the refractoriness of goods, and CaO＜10% is to guarantee wider sintering range MgO＜3% in order to avoid goods ftracture at the sintering late expansion.This shows to have optimum properties, should determine inviscid and ratio ranges " viscosity " two kinds of flyash, and determine the part by weight of each chemical composition of product of the present invention thus in order to guarantee sintered flyash product.
Product of the present invention is the flyash sintered ceramic product of making bond with " viscosity " flyash, and its component comprises flyash, bond, it is characterized in that: described flyash is inviscid flyash, and its component ratio is: SiO 244-59%, Al 2O 314-38%, Fe 2O 34-17%, CaO 2-12%, MgO 0.2-3.6%, described bond are " viscosity " flyash, its component ratio is: SiO 27-51%, Al 2O 32-18%, Fe 2O 35-24%, CaO 13-30%, MgO 1-3%, the two kinds of mixed plasticity index of powder＞7.
As the embodiment of the invention, the chemical composition of the inviscid flyash of selecting is SiO 256.6%, Fe 2O 332.6%, Al 2O 332.6%, CaO 2%, and MgO 0.5%; The chemical composition of selected " viscosity " flyash is: SiO 245%, Fe 2O 311%, Al 2O 314%, CaO 14%, and MgO 1%.
One of embodiment of the invention: inviscid and weight ratio " viscosity " flyash is 50: 50, and the component of mixed powder is: SiO 250.8%, Al 2O 323.3%, Fe 2O 38.3%, CaO 8.0%, and the plasticity index that MgO 0.75%, two powder records after mixing is 7, its Al 2O 3, Fe 2O 3, the composition content such as CaO, MgO all meet sintered article to the requirement of raw material.
Two of the embodiment of the invention: inviscid and weight ratio " viscosity " flyash is 35: 65, and the component of mixed powder is: SiO 249.1%, Al 2O 320.5%, Fe 2O 39.1%, CaO 9.8%, and the plasticity index that MgO 0.83%, two powder records after mixing is 7.5, its Al 2O 3, Fe 2O 3, the composition content such as CaO, MgO also all meet sintered article to the requirement of raw material.
By above two embodiment as seen, above-mentioned proportioning inviscid and " viscosity " flyash should be between 50: 50 and 35: 65, and " viscosity " flyash content surpasses 65%, then Fe203, CaO content will be above 10%, be lower than 50% then plasticity index will be lower than 7, all can not make qualified product.
The compression strength that test records two kinds of sintering test blocks is respectively 25,22 MPas, and rupture strength is 2.4,2 MPas, and proportion is 1300 kilograms/meter 3, it is all qualified to cross 25 freezing and thawing tests.
According to above result of the test, as most preferred embodiment of the present invention, its goods component ratio is: SiO 249.1-50.8%, Al 2O 320.5-23.3%, Fe 2O 38.3-9.1%, CaO 8.0-9.8%, MgO 0.75-0.83%.

Claims (2)

1, a kind of usefulness " viscosity " flyash is made the flyash sintered ceramic product of bond, comprises flyash, bond, it is characterized in that: described flyash is inviscid flyash, and its component ratio is: SiO 244-59%, Al 2O 314-38%, Fe 2O 34-17%, CaO2-12%, MgO0.2-3.6%, described bond are " viscosity " flyash, its component ratio is: SiO 27-51%, Al 2O 32-18%, Fe 2O 35-24%, CaO13-30%, MgO1-3%, the two kinds of mixed plasticity index of powder 〉=7.
2, by the described flyash sintered ceramic product of claim 1, it is characterized in that: the chemical composition of described ceramic is: SiO 249.1-50.8%, Al 2O 320.5-23.3%, Fe 2O 38.3-9.1%, CaO 8.0-9.8%, MgO 0.75-0.83.
CN 93112337 1993-02-08 1993-02-08 Sintered ceramic product of whole flyash using "viscous" flyash as adhesive Expired - Fee Related CN1029308C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 93112337 CN1029308C (en) 1993-02-08 1993-02-08 Sintered ceramic product of whole flyash using "viscous" flyash as adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 93112337 CN1029308C (en) 1993-02-08 1993-02-08 Sintered ceramic product of whole flyash using "viscous" flyash as adhesive

Publications (2)

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CN1075310A CN1075310A (en) 1993-08-18
CN1029308C true CN1029308C (en) 1995-07-12

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CN 93112337 Expired - Fee Related CN1029308C (en) 1993-02-08 1993-02-08 Sintered ceramic product of whole flyash using "viscous" flyash as adhesive

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4677899B2 (en) * 2003-10-03 2011-04-27 ニューサウス イノヴェーションズ ピーティワイ リミテッド Manufacture of goods from fly ash
CN102070309B (en) * 2010-04-14 2013-03-27 南京理工大学 Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge

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