CN1075310A - Make the made from full fly ash sintered ceramic product of wedding agent with " viscosity " flyash - Google Patents
Make the made from full fly ash sintered ceramic product of wedding agent with " viscosity " flyash Download PDFInfo
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- CN1075310A CN1075310A CN 93112337 CN93112337A CN1075310A CN 1075310 A CN1075310 A CN 1075310A CN 93112337 CN93112337 CN 93112337 CN 93112337 A CN93112337 A CN 93112337A CN 1075310 A CN1075310 A CN 1075310A
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- flyash
- viscosity
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Abstract
The invention discloses a kind of sintered ceramic (comprising material of construction) goods of all producing with flyash, uniform mixing " viscosity " and inviscid two kinds of flyash, add when mutually combining behind the water by crossing the calcium hydroxide react with that calcined lime postpones a deadline to digest generation through high temperature more than 1400 ℃ in active silica, activated alumina and " viscosity " flyash in the inviscid flyash, improve the stability that expands and becomes goods with splitting resistance after drying, roasting.Plasticity and the intensity that add that black liquid etc. is organic, the chemical bonds such as water glass after the dilution can improve blank.Goods raw materials cost of the present invention is low, less energy consumption, intensity height, unit weight light, reduced investment, alleviates construction labour intensity, improves the heat insulation and acoustic absorption performance, beautifies building, useful to electric power and building industry.
Description
The present invention proposes to mix with " viscosity " and inviscid two kinds of flyash, by adding the mutual combination of water and handling the back and produce the made from full fly ash sintered ceramic product.The technical field that belongs to material, ceramic, ceramic feedstock production and processing for building.
The lytag of at present domestic and international total utilization of PCA approach such as Tianjin Silicate Products Factory, russian patent SU1537-665A " Ceramic Mixture for e.g.Bricks Prodn ", Chinese patent 87101036 " manufacture method of full waste residue interior tile ", EPRI Proceedings:Shanghai 1991 Ash Utilization Conference are Ash Use Overview V.1,7-3 page or leaf among the Building Products, clearly demonstrate sintered flyash product and all be in inviscid flyash admixture on a small quantity to viscosity silicate binders such as the natural mud of 100% weight ratio, add or do not add pulverized anthracite, fuel in the plain slag of charcoal etc., after batch mixes is even, add water and make various types of bricks, blanks such as ball become various types of bricks by the general technology drying and roasting, architectural pottery goods such as haydite.The present invention successfully utilizes power plant to produce volume stability " viscosity " flyash defective, that be considered to be used alone as binding material usually to replace other viscosity silicate materials to make binder, produced non-obvious positively effect.
The annual discharging of Power Plant in China surpasses 20,000,000 cubic metres flyash.Occupy farmland, contaminate environment, cause public hazards.Utilize flyash to produce goods such as sintered ceramic material of construction.Turn waste into wealth big economic worth is arranged.Helpful to development electric power and building industry.
Flyash has inviscid and " viscosity " two kinds.The Chemical Composition of inviscid flyash is formed: SiO
244～59%, Al
2O
314～38%, Fe
2O
34～17%, CaO 2～12%, MgO 0.2～3.6%.The ash of the most coal of China belongs to this type.The typical case source of " viscosity " flyash is that the industrial coal of high-quality-Dong that China contains and have arc manipulation spare far away in a large number wins, Shenmu County's coal.The large power plant of the newly-built enlarging of national requirements burns with east victory, Shenmu County's coal as far as possible.Therefore many cities even same power plant (as Shanghai Wu Jing, pit hole mouth) have two kinds of flyash simultaneously.Win in east, the Chemical Composition of Shenmu coal ash composition is: SiO
27～51%, Al
2O
32～18%, Fe
2O
35～24%, CaO 13～30%, MgO 1～3%.East wins, when Shenmu County's coal dust burns in burner hearth, the free calcium oxide in the ash is subjected to that the high temperature burning causes the flyash volume stability defective more than 1400 ℃.Powder adds hydraulic when forming artificial seasoning behind base substrate ambient humidity, light and temperature is very big, can goods be damaged because of the burning lime slaking partly cracking of hydration swelling that slowly lags behind when running into the moisture content in the wetting vapour once more.Calcium oxide, magnesium oxide, ferric oxide content height cause having a narrow range of temperature between softening temperature and the temperature of fusion in " viscosity " flyash.Only 10 to 30 ℃ of east victory, this temperature difference of Shenmu coal ash.The sintering range of material be lower than temperature of fusion, line yield reach theoretical value more than 95% finish sintering temperature and near the two difference of the beginning sintering temperature of softening temperature, linear shrinkage ratio≤6%.Produce sintered article with " viscosity " flyash, sintering range is narrow, the temperature difference requirement at each position when not satisfying sintering.
Produce a large amount of external raw materials of the essential introduction of sintered flyash product according to prior art.The power plant location does not generally have clay pit or enough boron mud binders.The a large amount of clay minerals of long distance carrying come can increase the cost of sintered article, investment and the area of mill site that improvement is polluted in conjunction with flyash.A kind of comprehensive utilization new product that does not have above-mentioned shortcoming of permanent for this reason serious hope.
The purpose of this invention is to provide a kind of new ceramic: with power plant waste material flyash, need add a small amount of interior fuel when removing average carbon content＜6% butt weight ratio, not add external silicate binder and get the made from full fly ash sintered ceramic product; Propose to mix, comprise that with inviscid and " viscosity " two kinds of flyash the boiler multifuel combustion has the combination ash that obtains after inviscid ash and two kinds of coals of " viscosity " ash, allow them add processing mutually behind the water, improve physical and chemical performance mutually.A small amount of interior fuel, all use pulverized fuel ash as raw materials during except that needs.Its imagination is: it is vitreum that the essential mineral of inviscid flyash is formed.It is a kind of amorphous substance, by higher chemically reactive, mainly formed by active silica and activated alumina, cross calcined lime in energy and " viscosity " flyash and postpone a deadline to digest the calcium hydroxide react with generation newborn substance of generation, improve expansion stability and splitting resistance, reduce hydration heat, prevent the blank efflorescence.Make the wedding agent of inviscid flyash with " viscosity " flyash, the content of calcium oxide, magnesium oxide and ferric oxide increases few in the compound than inviscid flyash, qualified sintering range is arranged, and compound can reach plasticity index 7, can press ordinary process moulding and Low fire ceramic goods.Facts have proved that this imagination opened the door with the two kinds of grey production building material technique in same city.
Implement the present invention and at first want the Chemical Composition of third-party test " viscosity " and inviscid flyash to form weight ratio, according to the requirement of sintered building material to the silicate starting materials Chemical Composition: Al
2O
3＞10% to guarantee mechanical strength, the Fe of goods
2O
3＜10% so as not to reduce the firing range of goods and refractoriness, CaO＜10% with the sintering range that guarantees broad, MgO＜3% in order to avoid goods late expansion cracking, obtain that " viscosity " flyash maximum weight compares a% in the thick mixing material, use 30: 70 then, 40: 60 to a: 100-a weight ratio " viscosity " flyash: inviscid flyash mixes, add to its plasticity index of test, sintering range behind 22 ± 2% wet basis moisture, the feedstock production proportion scheme when selecting plasticity index more than 7, sintering range the batching scope is as commerical test more than 50 ℃.
Can blank strength adapt to equipment is major issue in the material produce of the present invention.Need carry out type approval test, select equipment such as the smooth agglomerating plant of track, wide short kiln section, setting machine, de-airing extruder to help the production of inductile raw material.Can increase blank strength with the chemical bonds such as water glass after organic bonds such as black liquid, the dilution for water.Press ordinary process moulding and Low fire ceramic goods.
Compare with at present domestic and international total utilization of PCA approach, the made from full fly ash sintered ceramic product need not external raw material.Investment and the floor space of handling some amount flyash are few, also have following advantage: " viscosity " flyash is many because of volatile matter in the coal, burning back carbon residue amount is few, but as long as inviscid flyash consumption greater than half, calorific value just can not want interior fire coal more than 1000 kcal/kg; 100,000 tons of products of every product can account for 30 mu in farmland less.Save nearly seven kilotons of standard coal.1300 kilograms/meter of made from full fly ash sintered ceramic material of construction unit weights
3, can alleviate deadweight and construction labour intensity 20%.Save half capital construction investment; The low heat insulation and sound absorbing capabilities that can improve buildings of thermal conductivity, the power consumption of air-conditioning all the year round of minimizing buildings.
The ceramic that the ash of different coals is fired has distinct colors: Huainan coal is a purple etc. for yellow, new river in Shangdong Province coal.Also can change product colour, the beautifying city building by industrial waste, the tinting material that contains different metal oxides below admixture 20% weight ratio.
Made from full fly ash sintered ceramic material of construction cost is low, quality good, and thoroughly instead of clay changes material of construction production looks, reduces and pollutes, and saves and ploughs and energy consumption, for power plant construction provides condition, in society, economic and technical special-effect arranged.
Embodiment: consist of: SiO with Chemical Composition
256.6%, Fe
2O
35.6%, Al
2O
332.6%, inviscid dry powder coal ash of willow Pu power plant and the Chemical Composition of CaO 2%, MgO 0.5% consist of: SiO
245%, Fe
2O
311%, Al
2O
314%, pit hole mouth second power plant " viscosity " the dry powder coal ash of CaO 14%, the MgO1% maximum weight that calculates " viscosity " flyash compares a=66.7.By 35: 65,50: 50, record plasticity index behind 65: 35 weight ratio batch mixings and be respectively 5,7,7.5, select 50: 50 ratio of components, calculate Al
2O
323%, CaO 8%, Fe
2O
38.3%, MgO 0.8% meets the requirement of sintered article to raw material.Sintering range=finish sintering temperature-beginning sintering temperature=1180 are tried to achieve in test also can satisfy the requirement of sintering building material made to raw material by ℃-1120 ℃=60 ℃.The ultimate compression strength that test records the sintering test block is respectively 25,22 MPas, and folding strength is 2.4,2 MPas; Proportion is 1300 kilograms/meter
3, anti-25 freezing and thawing tests are qualified, and color is a rice brown, cream-coloured.
Claims (1)
- A kind of usefulness " viscosity " flyash is made made from full fly ash sintered ceramic (the comprising material of construction) goods of binder, it is characterized in that:Add during 1, except that needs a small amount of interior fuel, do not add external silicate binder, mix with " viscosity " and inviscid two kinds of flyash, handle mutually and improve performance after made from full fly ash sintered ceramic (the comprising material of construction) goods that drying and roasting is produced by adding water.2,, add plasticity and the intensity of chemical bonds such as water glass after organic bond such as black liquid or the dilution when it is characterized in that feedstock production to improve blank according to the described material of claim 1..3, according to claim 1., 2. described material, it is characterized in that adding the industrial waste, the tinting material that contain different metal oxides below 20% weight ratio and change product colour.4, according to claim 1., 2., 3. described material, the mixing that it is characterized in that " viscosity " and inviscid two kinds of flyash is to finish after the burning in boiler furnace jointly by two kinds of coals that produce " viscosity " flyash and inviscid flyash.
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)
| Publication Number | Publication Date |
|---|---|
| CN1075310A true CN1075310A (en) | 1993-08-18 |
| CN1029308C CN1029308C (en) | 1995-07-12 |
Family
ID=4989956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93112337 Expired - Fee Related CN1029308C (en) | 1993-02-08 | 1993-02-08 | Sintered ceramic product of whole flyash using "viscous" flyash as adhesive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029308C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7892479B2 (en) | 2001-11-28 | 2011-02-22 | Newsouth Innovations Pty Limited | Manufacture of articles from fly ash |
| CN102070309A (en) * | 2010-04-14 | 2011-05-25 | 南京理工大学 | Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge |
-
1993
- 1993-02-08 CN CN 93112337 patent/CN1029308C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7892479B2 (en) | 2001-11-28 | 2011-02-22 | Newsouth Innovations Pty Limited | Manufacture of articles from fly ash |
| CN103086698B (en) * | 2003-10-03 | 2015-03-11 | 新南创新有限公司 | Manufacture of articles from fly ash |
| CN102070309A (en) * | 2010-04-14 | 2011-05-25 | 南京理工大学 | Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029308C (en) | 1995-07-12 |
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