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Foam microcrystalline glass and preparation method thereof

A foamed glass-ceramic, foamed glass technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of waste of resources, waste of energy, waste of high-temperature heat energy, etc., and achieve the effect of light weight and small thermal conductivity

Active Publication Date: 2012-12-12
北京盛康宁科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large amount of high-temperature red-hot waste slag discharged by high-energy-consuming iron and steel enterprises is shocking, not only wasting resources, but also wasting energy
At present, some iron-making blast furnace slag is used as low-value-added cement and road paving raw materials, and its high-temperature heat energy and water vapor are wasted in vain
In addition, in the building materials industry, some people of insight have invented foam insulation ceramics and foam insulation glass, but these insulation materials still require certain resources and energy to prepare
[0003] In recent years, the use of glass-ceramics has been developed, but there are few technical reports on foamed glass-ceramics, and no one has used high-temperature liquid red-hot steel slag (its chemical composition is shown in Table 1) without using additional energy. shown) to directly prepare foamed glass-ceramics as thermal insulation materials in construction, electric power, petrochemical and other industries

Method used

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  • Foam microcrystalline glass and preparation method thereof
  • Foam microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Select liquid blast furnace slag as main raw material (composition is as table 2), adopt calendering method to prepare off-white glass-ceramics plate, each step of its preparation method is as follows:

[0054] Table 2 Chemical composition of blast furnace slag (%)

[0055] CaO

SiO 2

al 2 o 3

TiO 2

MgO

MnO

TF

35.1

36.2

18.3

0.4

9.6

0.1

0.3

[0056] 1. Raw material ratio

[0057] Main raw material: 72% iron-free liquid blast furnace slag;

[0058] Auxiliary raw materials: quartz sand 120-200 mesh 8%;

[0059] Fluorite 80-200 mesh 4%;

[0060] Diatomaceous earth 40-60 mesh 3%;

[0061] Perlite 80-120 mesh 3%;

[0062] Glauber's salt 80-200 mesh 2%;

[0063] Borax 80-200 mesh 3%;

[0064]Sodium nitrate 80-200 mesh 4%

[0065] Silicon carbide 120-320 mesh 1%;

[0066] The water contained in the auxiliary raw materi...

Embodiment 2

[0078] Liquid stainless steel electric furnace slag was selected as the main raw material (the composition is shown in Table 3), and the black glass-ceramic stack was prepared by casting method, and the preparation steps were as follows:

[0079] Table 3 Chemical composition of stainless steel electric furnace slag (%)

[0080] CaO

MgO

MnO

Fe 2 o 3

FeO

al 2 o 3

SiO 2

Cr 2 o 3

35.5

5.3

1.9

4.9

8.6

14.3

29.5

1.6

[0081] 1. Raw material ratio

[0082] Main raw material: 85% iron-free liquid electric furnace slag;

[0083] Auxiliary raw materials: quartz sand 120-200 mesh 5%

[0084] Perlite 80-120 mesh 2.6%;

[0085] Diatomaceous earth 40-60 mesh 2%;

[0086] Calcite 40-80 mesh 1.5%;

[0087] Toner 120~320 mesh 0.5%;

[0088] Sodium silicate 40-120 mesh 3%;

[0089] Cobalt oxide 320 mesh 0.1%;

[0090] ...

Embodiment 3

[0104] Liquid converter slag was selected as the main raw material (the composition is shown in Table 4), and gray-black foam glass-ceramic thick-walled tubes (with an outer diameter of φ1800mm and an inner diameter of φ1200mm) were prepared by extrusion molding, and the preparation steps were as follows:

[0105] Table 4 Chemical composition of converter slag (%)

[0106] CaO

MgO

MnO

Fe 2 o 3

FeO

Al 2 o 3

SiO 2

43.2

10.8

3.2

4.2

12.8

3.6

22.2

[0107] 1. Raw material ratio:

[0108] Main raw material: 70% iron-free liquid converter slag;

[0109] Auxiliary raw materials: bentonite 40-60 mesh 2%;

[0110] Quartz sand 120-200 mesh 18%;

[0111] Glauber's salt 80-200 mesh 3%;

[0112] Perlite 80-120 mesh 2%;

[0113] Fluorite 80-200 mesh 3%;

[0114] Dolomite 40-80 mesh 1.5%

[0115] Toner 120~320 mesh 0.5%

[0116] Th...

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Abstract

The invention discloses foam microcrystalline glass. The foam microcrystalline glass is prepared by taking liquid-state red-heat steel slag as a main raw material and adding auxiliary raw materials including a certain quantity of mineral raw materials, a few quantities of chemical materials and the like. The preparation method comprises the following steps of: firstly, performing slag ladle precipitation on the liquid-state red-heat steel slag to remove steel to obtain iron-free liquid-state red-heat steel slag, adding the iron-free liquid-state red-heat steel slag and the mixed auxiliary raw materials into a stirring pond, and uniformly stirring the steel slag, the auxiliary raw materials and air bubbles generated by reacting the steel slag and the auxiliary raw materials by a group of rotary stirrers in the stirring pond, thus forming foam glass; secondly, forming the foam glass at 1,000-1,250 DEG C to prepare a foam glass blank; thirdly, feeding the foam glass blank into a heat preserving furnace, crystallizing and annealing the foam glass in a cooling process along with the furnace, and converting the foam glass into a foam microcrystalline glass blank; and fourthly, processing the foam microcrystalline glass blank to be in the required size of the product. The preparation method is energy-saving and environment-friendly, and additional energy sources do not need to be supplemented.

Description

technical field [0001] The invention relates to a foam glass-ceramic and a preparation method thereof. Background technique [0002] The voice of energy conservation and environmental protection is getting louder and louder, and the development of low-carbon economy has become one of the main topics of all countries in the world. In industries such as metallurgy, electric power, petrochemical industry, construction and building materials, energy conservation and environmental protection have become an insurmountable and unavoidable important assessment content. The large amount of high-temperature red-hot waste slag discharged by high-energy-consuming iron and steel enterprises is shocking, not only wasting resources, but also wasting energy. At present, some iron-making blast furnace slag is used as low-value-added cement and road paving raw materials, and its high-temperature heat energy and water vapor are wasted in vain. In addition, in the building materials industry,...

Claims

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Application Information

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IPC IPC(8): C03C11/00C03B19/08
Inventor 梁华巍
Owner 北京盛康宁科技开发有限公司
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