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Microcrystalline glass prepared from desulphurized coal ash and preparation method of microcrystalline glass

A technology for desulfurizing fly ash and glass-ceramics, which is applied in the field of industrial waste glass-ceramics, which can solve problems such as environmental hazards, land occupation, and dust pollution, and achieve high mechanical strength, reduced raw material costs, and good corrosion resistance.

Inactive Publication Date: 2013-03-20
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the strengthening of environmental governance, power plants and other enterprises will discharge a large amount of desulfurization ash, which will be stacked in the open air, which not only occupies land, but also easily causes dust pollution, pollutes water sources and endangers the environment.

Method used

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  • Microcrystalline glass prepared from desulphurized coal ash and preparation method of microcrystalline glass
  • Microcrystalline glass prepared from desulphurized coal ash and preparation method of microcrystalline glass
  • Microcrystalline glass prepared from desulphurized coal ash and preparation method of microcrystalline glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The raw material formula is shown in Table 3, the chemical composition of the raw materials is shown in Table 4, and the calculated chemical composition of glass-ceramic is shown in Table 5.

[0035] The raw material formula (kg) of table 3, embodiment 1:

[0036] raw material

Desulfurization fly ash

Silica powder

limestone

dolomite

Soda ash

Fluorite

toner

salt

50

43.12

20.18

0

14.66

3

2

1

[0037] Table 4, various raw material mass percentage composition:

[0038]

[0039] Table 5, the glass-ceramics composition table (mass percentage) of embodiment 1:

[0040] composition

SiO 2

Fe 2 o 3

Al 2 o 3

CaO

MgO

Na 2 o

57.40

1.87

6.20

24.93

1.37

8.23

[0041] ＊ S 2- Not calculated.

[0042] Preparation Process:

[0043] 1. Raw material weighing: Weigh the desulfurized fly a...

Embodiment 2

[0060] The raw material formula of Example 2 is shown in Table 6, the chemical composition of the raw materials is shown in Table 4, and the chemical composition of the glass-ceramics calculated therefrom is shown in Table 7.

[0061] The raw material formula (kg) of table 6 embodiment 2:

[0062] raw material

Desulfurization fly ash

Silica powder

limestone

dolomite

Soda ash

Fluorite

toner

salt

60

37.3

0

20

14.66

3

2

1

[0063] The glass-ceramics composition table (mass percentage) of embodiment 2 of table 7:

[0064] composition

SiO 2

Fe 2 o 3

Al 2 o 3

CaO

MgO

Na 2 o

54.03

2.20

7.49

22.38

5.79

8.11

[0065] ＊ S 2- Not calculated.

[0066] Preparation Process:

[0067] Raw material crushing, mixing, melting, molding, annealing and sample processing are the same as in Example 1....

Embodiment 3

[0076] The raw material formula of Example 3 is shown in Table 8, the chemical composition of the raw materials is shown in Table 4, and the chemical composition of the glass-ceramics calculated therefrom is shown in Table 9.

[0077] The raw material formula (kg) of table 8, embodiment 3:

[0078] raw material

Desulfurization fly ash

Silica powder

limestone

dolomite

Soda ash

Fluorite

toner

salt

35

48.5

31.2

0

14.8

3

2.5

1

[0079] Table 9, glass-ceramics composition table (mass percentage) of embodiment 3:

[0080] composition

SiO 2

Fe 2 o 3

Al 2 o 3

CaO

MgO

Na 2 o

58.6

1.37

4.46

26.0

1.08

8.49

[0081] ＊ S 2- Not calculated.

[0082] Preparation Process:

[0083] Raw material crushing, mixing, melting, molding, annealing and sample processing are the same as in Example 1:

...

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Abstract

The invention provides microcrystalline glass prepared from desulphurized coal ash and a preparation method of the microcrystalline glass. The microcrystalline glass is prepared through carrying out burdening, mixing, fusing, molding, annealing, coring and crystallizing, and cold machining on 30-65 percent by weight of desulphurized coal ash. The microcrystalline glass comprises the following main ingredients: 50-60 percent of SiO2, 1-2.5 percent of Fe2O3, 3-10 percent of Al2O3, 20-30 percent of CaO, 1-9 percent of MgO and 5-10 percent of Na2O. In the invention, the industrial wastes are fully utilized, and the expenses of the raw materials are effectively reduced. The microcrystalline glass has the excellent properties of high mechanical strength, high hardness, good corrosion resistance, wear resistance, and the like and has a good decoration effect. The microcrystalline glass can be made into various pipes and plates and can be widely applied to architecturally wear-resistant and corrosion-resistant materials or building decoration materials.

Description

technical field [0001] The invention belongs to the field of glass-ceramics and relates to industrial waste slag glass-ceramics whose main crystal phase is wollastonite, part of anorthite and diopside. It is especially concerned with the CaCO-rich 3 and CaSO 3 Fly ash—desulfurization fly ash is used as the main raw material to produce glass-ceramics in the technical field. Background technique [0002] Waste slag glass-ceramic is a glass-ceramic prepared mainly from various metallurgical waste slag, industrial and mining tailings, and fly ash from thermal power plants. Glass-ceramic, also known as glass-ceramic, is a new type of material developed by combining glass and ceramic technology. Such as high mechanical strength, corrosion resistance, heat resistance, wear resistance, good oxidation resistance, excellent electrical properties, adjustable expansion coefficient, good thermal stability, etc., and is superior to natural stone and ceramics, and can be used for buildi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/06
Inventor 王志强唐乃岭王悦张睿刘维港张临安陈丽芝赵倩
Owner DALIAN POLYTECHNIC UNIVERSITY