CN105174723A - Method for preparing micro-crystal glass by means of desulfurized fly ash - Google Patents

Method for preparing micro-crystal glass by means of desulfurized fly ash Download PDF

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CN105174723A
CN105174723A CN201510605290.7A CN201510605290A CN105174723A CN 105174723 A CN105174723 A CN 105174723A CN 201510605290 A CN201510605290 A CN 201510605290A CN 105174723 A CN105174723 A CN 105174723A
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devitrified glass
coal ash
coring
prepare
crystal glass
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CN105174723B (en
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雷雪飞
薛向欣
杨合
牛梦超
杨延涛
高小尧
刘小品
张志男
隋钰莹
裴敬轩
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Northeastern University China
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Abstract

The invention aims at providing a method for preparing micro-crystal glass by means of desulfurized fly ash for reusing the desulfurized fly ash, and belongs to the technical field of micro-crystal glass preparation. The method comprises the steps that the raw materials comprise, by mass, 35%-40% of the fly ash, 10%-15% of SiO2, 20%-30% of CaCO3, 0-5% of MgO, 5%-10% of Na2CO3, 0-5% of ZnO, 0-5% of H3BO3, 0-5% of CaF2 and 0-5% of Li2O, wherein the purity of SiO2, CaCO3, MgO, Na2CO3, ZnO, H3BO3, CaF2 and Li2O is chemically pure; then the raw materials are processed through ball-mill mixing, preheating, fusing, mold casting, differential thermal analyzing and nucleating and crystallizing, and lastly the micro-crystal glass is prepared. According to the method, the fly ash is taken as the main raw materials, and chemically pure reagents such as magnesium oxide, sodium carbonate and zinc oxide are added to serve as the auxiliary materials; compared with traditionally prepared micro-crystal glass, the micro-crystal glass produced through the method is good in surface smoothness and high in mechanical strength and hardness and has the good thermal shock property, corrosion resistance and abrasive resistance.

Description

A kind of method utilizing desulfurized powder coal ash to prepare devitrified glass
Technical field
The invention belongs to devitrified glass preparing technical field, particularly a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass.
Background technology
Devitrified glass, also known as glass-ceramic, it is a kind of type material that comprehensive glass and ceramic technology grow up, it is the equally distributed material of microcrystal and glassy phase, its physicochemical property has concentrated glass, triple advantages of pottery and lithotome, as physical strength is high, corrosion-resistant, heat-resisting, wear-resisting, antioxidant property is good, electrical property is excellent, the coefficient of expansion is adjustable, Heat stability is good etc., and it is higher than the brightness of pottery, stronger than glass toughness, can be used for building curtain wall and indoor high-grade decoration, also can do structured material mechanically, electronics, insulating material on electrician, the baseboard material of large-scale integrated circuit, the heat-resisting serial vessel of microwave oven, chemical industry and impregnating material and mine high-abrasive material etc., it is the type material of the 21 century with development prospect.Thus the fields such as electronics, chemical industry, military affairs, space flight, nuclear industry and building are widely used in.Because devitrified glass can use ore, industrial tailings, metallurgical slag, flyash, coal gangue etc. as main production raw material, and produced in process pollution-free, the no radioactivity pollute of product own, therefore be otherwise known as environmentfriendly products or green material.
At present, slag is utilized to manufacture devitrified glass existing large quantity research at home.If Chongqing Silicate Inst.'s application number is the Chinese patent of 89105864.8, with the slag crystallite goods of titaniferous; Chongqing Architectural Engineering College's patent No. is the Chinese patent of ZL90106159.X, utilizes useless chromium slag to produce nucleated glass building fancy face plate; Wuhan University of Technology's application number is the Chinese patent of 200610019268.5, utilizes yellow phosphorus furnace slag, Ta Nb tailings manufacture except crystallized glass article.But at present to desulfurized powder coal ash be main raw material prepare devitrified glass research, going into operation has no report.Because the enterprises such as the reinforcement power plant along with environmental improvement aspect are by desulfurized powder coal ash a large amount of for discharge, air storage, had both occupied soil, also easily caused dust pollution, polluted source and harm environment.
Therefore, be necessary to recycle desulfurized powder coal ash.
Summary of the invention
The object of the invention is, in order to recycle desulfurized powder coal ash, to provide a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass.The method take flyash as main raw material, with chemically pure reagents such as magnesium oxide, sodium carbonate, zinc oxide for devitrified glass prepared by auxiliary material.Compared with the devitrified glass prepared with tradition, the devitrified glass surface smoothness that the present invention produces is good, physical strength is high, hardness is large, have good thermal shock resistance, erosion resistance and wear resistance.
Utilize desulfurized powder coal ash to prepare a method for devitrified glass, comprise the steps:
1) prepare burden
By raw material by following mass percentage batching, total content is 100%: flyash 35%-40%, SiO 210%-15%, CaCO 320%-30%, MgO0-5%, Na 2cO 35-10%, ZnO0-5%, H 3bO 30-5%, CaF 20-5%, Li 2o0-5%;
Wherein, in desulfurized powder coal ash, the mass percentage of each component is: SiO 245-60%, Al 2o 325-35%, Fe 2o 35-10%, CaO0-8%, TiO 20-5%, K 2o0-5%, MgO0-5, Na 2o0-5%, other 0-5%; Further, SiO 2, CaCO 3, MgO, Na 2cO 3, ZnO, H 3bO 3, CaF 2, Li 2the purity of O is chemical pure;
2) ball milling mixing
By the raw material ball milling 2 ~ 3h prepared according to the above ratio, wear into that fineness is 0.03 ~ 0.05mm, the fine powder that mixes;
3) raw material preheating
Raw material fine powder is heated to 1000 ~ 1300 DEG C with the temperature rise rate of 8 ~ 13 DEG C/min from room temperature;
4) melting
By the heating raw materials to 1440 after preheating ~ 1480 DEG C, temperature rise rate is 5 ~ 10 DEG C/min, and insulation 1 ~ 2h, obtains the material melt of uniform bubble-free;
5) casting mold
Pour in punching block by melt after punching block being preheated to 400 ~ 600 DEG C, then punching block being moved on to temperature is that in the process furnace of 400 ~ 600 DEG C, furnace cooling is shaping, obtains parent glass;
6) differential thermal analysis
Differential thermal analysis is carried out to parent glass, according to the definite coring of differential thermal curve determination material, crystallization temperature;
7) coring
Cooled parent glass is warming up to 500 ~ 800 DEG C and carries out coring, make to produce the nucleus that can generate crystallization in parent glass, temperature rise rate is 5 ~ 10 DEG C/min, and coring soaking time 2 ~ 4h, obtains coring material;
8) crystallization
Again coring material is warming up to 700 ~ 1000 DEG C and carries out crystallization, make to generate crystallization in parent glass, temperature rise rate is 5 ~ 10 DEG C/min, and crystallization soaking time 3 ~ 5h, then furnace cooling obtains devitrified glass.
The devitrified glass principal crystalline phase prepared by aforesaid method is the long (Ca of calcium aluminium Huang 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8).
The devitrified glass obtained by aforesaid method becomes the devitrified glass finished product that can be used for each field to use after cutting, grinding and grinding and polishing light.
After testing, devitrified glass prepared by aforesaid method has good mechanical property and chemical stability, and its ultimate compression strength on average reaches more than 145MPa, and hardness reaches more than 500HV; And physical properties also shows well, density is 2.01 ~ 2.82g/cm 3, water-intake rate is 0.21 ~ 0.37%, and acid resistance is 0.86 ~ 1.31%.
Compared with prior art, advantage of the present invention is:
1, method of the present invention is simple, easy to operate.
2, in the present invention, desulfurization powdered coal ash usage quantity can reach about 50%, takes full advantage of trade waste, and effectively reduces expense of raw materials.
3, the raw material SiO in the present invention 2, CaCO 3, MgO, Na 2cO 3, ZnO, H 3bO 3, CaF 2, Li 2the purity of O is chemical pure, its object is to: accurately can control raw material dosage, the composition of conservative control devitrified glass, thus the product obtaining excellent property.
4, the devitrified glass planeness of the present invention's production is good, physical strength is high, hardness is large, have good heat impedance, flexural strength, erosion resistance and wear resistance, product can be made into all kinds of tubing, sheet material, can be widely used in architectural abrasion-proof corrosion-proof corrosion material, building and ornament materials, use for laboratory heating appliances, high-temperature heat exchanger, for silica glass, window pyrometer etc.
Accompanying drawing explanation
Fig. 1, present invention process schematic flow sheet.
The X ray diffracting spectrum of Fig. 2, the embodiment of the present invention 1,2 and 3 devitrified glass, in figure ◆ be gehlenite (Ca 2al 2siO 7), ★ is nepheline (NaAlSiO 4), ● be lime feldspar (CaAl 2si 2o 8).
Embodiment
Below in conjunction with concrete embodiment, content of the present invention is described further and is supplemented.
The laboratory apparatus that the present invention adopts is in table 1.
Table 1, laboratory apparatus cartogram
Component and the content of following flyash used are: SiO 252.03%, Al 2o 330.15%, Fe 2o 37.29%, CaO4.38%, TiO 21.60%, K 2o1.56%, MgO0.52%, Na 2o0.32%, other are 2.15% years old.The component of flyash of the present invention and content are not limited to this constant concentration, and mass percentage is: SiO 245-60%, Al 2o 325-35%, Fe 2o 35-10%, CaO0-8%, TiO 20-5%, K 2o0-5%, MgO0-5, Na 2the flyash of O0-5%, other 0-5% all can realize the present invention.
Other raw materials are commercial, and purity is chemical pure.
The performance test methods adopted in embodiment:
1, differential thermal analysis and: on HCT-2 type differential thermal analyzer, carry out differential thermal analysis, determine coring and crystallization temperature.
2, crystal phase analysis: carry out XRD analysis with DX-2500XX-Ray diffractometer, determines the principal crystalline phase of devitrified glass.
3, folding strength test: adopt WDW3100 type micro-control electronic universal tester to utilize the folding strength of three-point bending method working sample.
4, microsclerometry: by the hardness of HXD-1000 digital micro-analysis hardness-testing device working sample, three points surveyed by each sample, represent its microhardness with mean value.Survey three samples altogether, finally calculate the mean value of the microhardness of three samples.
Embodiment 1
Each raw materials quality percentage composition consists of:
1) prepare burden: prepare burden by above-mentioned raw materials allocation sheet;
2) ball milling mixing: flyash and other raw material are joined the planetary vibromill ball milling mixing 3h that model is QM-3SP2, the fine powder that ball milling becomes fineness to be 0.03mm, mixes;
3) raw material preheating: in process furnace, raw material is risen to 1000 DEG C from room temperature, temperature rise rate is 8 DEG C/min;
4) melting: by the heating material after preheating to melt temperature 1440 DEG C, temperature rise rate is 5 DEG C/min, and insulation 1h, obtains the material melt of uniform bubble-free;
5) casting mold: punching block is put into process furnace and be preheated to 400 DEG C, then pour in punching block by the melt of uniform bubble-free, is then moved on in 400 DEG C of process furnace, shaping with furnace temperature naturally cooling, obtains parent glass;
6) differential thermal analysis: differential thermal analysis is carried out to parent glass, the nucleation temperature measuring this material according to differential thermal curve is 500 DEG C, crystallization temperature is 700 DEG C;
7) coring: the parent glass of cooling is carried out coring at 500 DEG C, temperature rise rate is 5 DEG C/min, and insulation 2h, forms coring material;
8) crystallization: again coring material is warming up to 700 DEG C and carries out crystallization, temperature rise rate is 5 DEG C/min, and insulation 3h, then becomes devitrified glass with furnace temperature naturally cooling.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8), as shown in Figure 2.
3, mechanical property: average folding strength 148.6MPa, average microhardness 547.6HV.
4, physicals: density is 2.81g/cm 3, water-intake rate is 0.21%, and acid resistance is 1.01%.
Comparative example 1
This comparative example adopts flyash and common cullet powder (after ball milling, granularity is at 0.7mm) to be raw material, and the mass ratio of flyash and cullet powder is 39.1:60.9, and preparation method is with embodiment 1; Nucleation temperature is 530 DEG C, crystallization temperature is 670 DEG C.
The mass percentage of each composition of glass powder consists of:
Test result:
1, sample appearance quality: obtained is become finished product after cutting, grinding and grinding and polishing light, and the glossiness of outward appearance is very poor compared with the devitrified glass of embodiment 1, and crystallization situation becomes particulate state to distribute, arranges not tight each other, has a little pore.
2, the principal crystalline phase of sample: akermanite (Ca 2mgSi 2o 7), and akermanite is not as good as gehlenite (Ca in density and structural strength 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8).
3, mechanical property: average folding strength 121.6MPa, average microhardness 450.3HV, compared with the bad mechanical property of the devitrified glass that embodiment 1 obtains.
4, physicals: density is 2.79g/cm 3, water-intake rate is 0.23%, and acid resistance is 1.03%.
As can be seen from comparative example, the raw material SiO in the present invention 2, CaCO 3, MgO, Na 2cO 3, ZnO, H 3bO 3, CaF 2, Li 2the purity of O is chemical pure, its object is to: accurately can control raw material dosage, the composition of conservative control devitrified glass, thus the product obtaining excellent property.
Embodiment 2
Each raw materials quality percentage composition consists of:
1) prepare burden: prepare burden by above-mentioned raw materials allocation sheet;
2) mix: flyash and other raw material are added vibromill ball milling mixing 2.5h, ball milling become fineness to be 0.04mm, mix fine powder;
3) raw material preheating: in process furnace, raw material is risen to 1200 DEG C from room temperature, temperature rise rate is 10 DEG C/min;
4) melting: by the heating material after preheating to melt temperature 1460 DEG C, temperature rise rate is 7 DEG C/min, and insulation 90min, obtains the material melt of uniform bubble-free;
5) casting mold: punching block is put into process furnace and be preheated to 500 DEG C, then the melt of uniform bubble-free is fallen shaping in punching block, then moved on in 500 DEG C of process furnace, with furnace temperature naturally cooling, obtained parent glass;
6) differential thermal analysis: differential thermal analysis is carried out to parent glass, the nucleation temperature measuring this material according to differential thermal curve is 750 DEG C, crystallization temperature is 850 DEG C;
7) coring: the parent glass of cooling is carried out coring at 750 DEG C, temperature rise rate is 7 DEG C/min, and insulation 3h, forms coring material;
8) crystallization: again coring material is warming up to 850 DEG C and carries out crystallization, temperature rise rate is 7 DEG C/min, and insulation 4h, then becomes devitrified glass with furnace temperature naturally cooling.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8), as shown in Figure 2.
3, mechanical property: average folding strength 158.5MPa, average microhardness 530.4HV.
4, physicals: density is 2.83g/cm 3, water-intake rate is 0.21%, and acid resistance is 1.04%.
Embodiment 3
Each raw materials quality percentage composition consists of:
1) prepare burden: prepare burden by above-mentioned raw materials allocation sheet;
2) mix: flyash and other raw material are added vibromill ball milling mixing 2h, ball milling become fineness to be 0.05mm, mix fine powder;
3) raw material preheating: use process furnace that raw material is risen to 1300 DEG C from room temperature, temperature rise rate is 13 DEG C/min;
4) melting: by the heating material after preheating to melt temperature 1480 DEG C, temperature rise rate is 10 DEG C/min, and insulation 2h, obtains the material melt of uniform bubble-free;
5) casting mold: punching block is put into process furnace and be preheated to 600 DEG C, then the melt of uniform bubble-free is fallen shaping in punching block, then moved on in 600 DEG C of process furnace, with furnace temperature naturally cooling, obtained parent glass;
6) differential thermal analysis: differential thermal analysis is carried out to parent glass, the nucleation temperature measuring this material according to differential thermal curve is 800 DEG C, crystallization temperature is 1000 DEG C;
7) coring: the parent glass of cooling is warming up to 800 DEG C and carries out coring, temperature rise rate is 10 DEG C/min, and insulation 4h, forms coring material;
8) crystallization: again coring material is warming up to 1000 DEG C of crystallization, temperature rise rate is 10 DEG C/min, and insulation 5h, then becomes devitrified glass with furnace temperature naturally cooling.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8), as shown in Figure 2.
3, mechanical property: average folding strength 160.8MPa, average microhardness 527HV.
4, physicals: density is 2.77g/cm 3, water-intake rate is 0.28%, and acid resistance is 0.93%.
Embodiment 4
Each raw materials quality percentage composition consists of:
Preparation method is with embodiment 1, and nucleation temperature is 860 DEG C, crystallization temperature is 1100 DEG C.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8).
3, mechanical property: average folding strength 145.3MPa, average microhardness 553.1HV.
4, physicals: density is 2.80g/cm 3, water-intake rate is 0.21%, and acid resistance is 1.06%.
Embodiment 5
Each raw materials quality percentage composition consists of:
Preparation method is with embodiment 2, and nucleation temperature is 780 DEG C, crystallization temperature is 900 DEG C.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8).
3, mechanical property: average folding strength 153.3MPa, average microhardness 536.7HV.
4, physicals: density is 2.73g/cm 3, water-intake rate is 0.31%, and acid resistance is 1.13%.
Embodiment 6
Each raw materials quality percentage composition consists of:
Preparation method is with embodiment 3, and nucleation temperature is 730 DEG C, crystallization temperature is 850 DEG C.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8).
3, mechanical property: average folding strength 157.2MPa, average microhardness 534.3HV.
4, physicals: density is 2.76g/cm 3, water-intake rate is 0.26%, and acid resistance is 1.06%.
Embodiment 7
Each raw materials quality percentage composition consists of:
Preparation method is with embodiment 1, and nucleation temperature is 830 DEG C, crystallization temperature is 1000 DEG C.
Test result:
1, sample appearance quality: obtained devitrified glass is become finished product after cutting, grinding and grinding and polishing light, and color is dark-grey black, surface compact, the defects such as pore-free, surface of polished light.
2, the principal crystalline phase of sample: gehlenite (Ca 2al 2siO 7) and lime feldspar (CaAl 2si 2o 8).
3, mechanical property: average folding strength 151.2MPa, average microhardness 542.3HV.
4, physicals: density is 2.80g/cm 3, water-intake rate is 0.28%, and acid resistance is 1.09%.

Claims (7)

1. utilize desulfurized powder coal ash to prepare a method for devitrified glass, it is characterized in that, comprise the steps:
(1) prepare burden
By raw material by following mass percentage batching: flyash 35%-40%, SiO 210%-15%, CaCO 320%-30%, MgO0-5%, Na 2cO 35-10%, ZnO0-5%, H 3bO 30-5%, CaF 20-5%, Li 2o0-5%;
Further, SiO 2, CaCO 3, MgO, Na 2cO 3, ZnO, H 3bO 3, CaF 2, Li 2the purity of O is chemical pure;
(2) ball milling mixing
By the raw material ball milling 2 ~ 3h prepared according to the above ratio, wear into that fineness is 0.03 ~ 0.05mm, the fine powder that mixes;
(3) raw material preheating
Raw material fine powder is heated to 1000 ~ 1300 DEG C by room temperature;
(4) melting
Again the raw material fine powder after preheating is heated to 1440 ~ 1480 DEG C, insulation 1 ~ 2h, obtains the material melt of uniform bubble-free;
(5) casting mold
After punching block being preheated to 400 ~ 600 DEG C, then pour in punching block by material melt, then punching block being moved on to temperature is in the process furnace of 400 ~ 600 DEG C, and material furnace cooling is shaping, obtains parent glass;
(6) differential thermal analysis
Differential thermal analysis is carried out to parent glass, according to the definite coring of differential thermal curve determination material, crystallization temperature;
(7) coring
Cooled parent glass is warming up to 500 ~ 800 DEG C and carries out coring, obtain coring material;
(8) crystallization
Again coring material is warming up to 700 ~ 1000 DEG C and carries out crystallization, then furnace cooling obtains devitrified glass.
2. a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass according to claim 1, it is characterized in that, in described desulfurized powder coal ash, the mass percentage of each component is: SiO 245-60%, Al 2o 325-35%, Fe 2o 35-10%, CaO0-8%, TiO 20-5%, K 2o0-5%, MgO0-5, Na 2o0-5%, other 0-5%.
3. a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass according to claim 1, it is characterized in that, the temperature rise rate in described step (3) is 8 ~ 13 DEG C/min.
4. a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass according to claim 1, it is characterized in that, the temperature rise rate in described step (4) is 5 ~ 10 DEG C/min.
5. a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass according to claim 1, it is characterized in that, the temperature rise rate in described step (7) is 5 ~ 10 DEG C/min, and coring soaking time is 2 ~ 4h.
6. a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass according to claim 1, it is characterized in that, the temperature rise rate in described step (8) is 5 ~ 10 DEG C/min, and crystallization soaking time is 3 ~ 5h.
7. a kind of method utilizing desulfurized powder coal ash to prepare devitrified glass according to claims 1 to 6, is characterized in that, prepared devitrified glass principal crystalline phase is calcium aluminium Huang length and lime feldspar.
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CN106396412A (en) * 2016-08-31 2017-02-15 望江宇花玻璃有限公司 Perovskite-based ceramic glass containing modified fly ash and preparation process of perovskite-based ceramic glass
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CN109160741A (en) * 2018-11-14 2019-01-08 西南科技大学 A kind of direct sintering coal ash for manufacturing for devitrified glass method
CN109160742A (en) * 2018-11-14 2019-01-08 西南科技大学 It is a kind of using flyash as the devitrified glass of raw material

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106186705A (en) * 2016-07-12 2016-12-07 华电电力科学研究院 A kind of method preparing glass ceramic material with high-Fluorine wastewater
CN106277801A (en) * 2016-08-31 2017-01-04 望江宇花玻璃有限公司 A kind of homoiothermic devitrified glass containing modified coal ash and preparation technology thereof
CN106396412A (en) * 2016-08-31 2017-02-15 望江宇花玻璃有限公司 Perovskite-based ceramic glass containing modified fly ash and preparation process of perovskite-based ceramic glass
CN108395104A (en) * 2018-04-11 2018-08-14 四川名微晶科技股份有限公司 It is the method that primary raw material prepares black glass ceramic new material using origin-state ash
CN109160741A (en) * 2018-11-14 2019-01-08 西南科技大学 A kind of direct sintering coal ash for manufacturing for devitrified glass method
CN109160742A (en) * 2018-11-14 2019-01-08 西南科技大学 It is a kind of using flyash as the devitrified glass of raw material

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