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Foam glass ceramic and preparation method thereof

A technology of foamed glass-ceramics and foaming agent, which is applied in the field of preparing foamed glass-ceramics by using blast furnace hot slag and its preparation, can solve the problem of few high value-added products, and achieve strong adaptability to high and low temperature changes of flue gas, Low density, high compressive and flexural strength

Inactive Publication Date: 2012-09-26
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are too few high value-added products produced by using blast furnace slag, especially the direct use of blast furnace hot slag to prepare foamed glass-ceramic, which has not been reported yet.

Method used

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  • Foam glass ceramic and preparation method thereof
  • Foam glass ceramic and preparation method thereof
  • Foam glass ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The blast furnace hot slag used was taken from Baotou Iron Works, and its chemical composition is shown in Table 1. The fly ash was obtained from Hexi Power Plant of Inner Mongolia Huadian Baotou Power Generation Co., Ltd., and the rare-separated tailings were obtained from Baotou Steel Rare Earth Plant. The chemical composition is shown in Table 2 and Table 3, and the particle size is 200 mesh. The chemical composition (wt%) of the base glass is:

[0031]

[0032] (1) Measure 2.01 tons of fly ash, 1.07 tons of borax, 0.1 tons of soda ash, 0.5 tons of rare tailings, and 0.5 tons of quartz sand; then mix fly ash, borax, soda ash, rare tailings, and quartz sand Add to mixer and mix well.

[0033] (2) Put the mixture prepared in step (1) into a grid-shaped mold with cordierite shelving as the substrate, and then sinter it in a shuttle kiln at 650°C for 2 Hours, a porous bulk material is obtained.

[0034] (3) The porous block material prepared in step (2) is placed i...

Embodiment 2

[0040] The blast furnace hot slag used was taken from Baotou Iron Works, and its chemical composition is shown in Table 1. The fly ash was obtained from Hexi Power Plant of Inner Mongolia Huadian Baotou Power Generation Co., Ltd., and the rare-separated tailings were obtained from Baotou Steel Rare Earth Plant. The chemical composition is shown in Table 2 and Table 3, and the particle size is 200 mesh. The chemical composition (wt%) of the base glass is:

[0041]

[0042] (1) Measure 2.12 tons of fly ash, 1.14 tons of borax, 0.11 tons of soda ash, 0.5 tons of rare tailings, and 0.35 tons of quartz sand; then mix fly ash, borax, soda ash, rare tailings, and quartz sand Add to mixer and mix well.

[0043] (2) Put the mixture prepared in step (1) into a grid-shaped mold with cordierite shelving as the substrate, and then sinter it in a shuttle kiln at 700°C for 1.5 Hours, a porous bulk material is obtained.

[0044] (3) Put the porous block material prepared in step (2) in ...

Embodiment 3

[0050] (1) Grind the glass quenching material particles prepared in Example 1 on a ball mill, cross a 200 mesh sieve, weigh 100 parts by weight of glass powder, 60 parts by weight of sodium sulfate with a particle size of 325 objects, mix, and then The material is formed in the type kiln.

[0051] (2) The formed glass frit is subjected to nucleation at 730°C for 1 hour, crystallization at 850°C for 2 hours, and sintering at 1000°C for 10 minutes to prepare foamed glass-ceramics.

[0052] (3) The volume density of the prepared foamed glass-ceramic is 0.87g cm -3 , thermal conductivity 0.19W / k m 2 , compressive strength 9.3MPa., acid resistance 97%.

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Abstract

The invention relates to a foam glass ceramic prepared from blast furnace hot melting slag and a preparation method of the foam glass ceramic, belonging to the field of inorganic materials. In the preparation method, steeling blast furnace hot melting slag is used as a main raw material, coal ash, borax, calcined soda, rear sorted tail ore, quartz sand and the like are respectively measured, evenly mixed and then baked into porous blocks, the porous blocks are added in a slag ladle, smelting is carried out by using the blast furnace hot melting slag, a melting material is subject to water quenching to obtain glass water quenching materials with different particle sizes; and the glass water quenching materials are dried and ball-milled, a foaming agent is added to be mixed with the dried and ball-milled glass water quenching materials, press forming or spreading forming is carried out, and then the foam glass ceramic is prepared by nucleating, crystallization and sintering. In the invention, a large amount of heat energy stored in the blast furnace hot melting slag is effectively utilized, and production cost is lowered; and the prepared foam glass ceramic has the characteristics of low thermal conductivity, small density, high temperature resistance, corrosion resistance and high compression resistance and breaking strength, has strong adaptable property on high-low temperature variation of smoke, and can be widely used as a multi-cylinder type and sleeve type lining material for discharging smoke by wet desulphurization in a heat-engine plant, thermal equipment insulation, heat-insulating materials and the like.

Description

Technical field: [0001] The invention relates to a foamed glass-ceramic and a preparation method thereof, in particular to preparing foamed glass-ceramic by using blast furnace hot slag and a preparation method thereof. Background technique: [0002] Blast furnace slag is the main by-product of the iron and steel smelting process. About 250-350 kg of blast furnace slag is produced for every ton of pig iron smelted. According to the calculation of my country's annual pig iron output of 469.44 million tons, the slag production amounted to 140 million tons. The slag discharge temperature of blast furnace slag is above 1500°C, and each ton of slag contains heat equivalent to 60kg of standard coal. Therefore, it is an effective way to save energy and reduce consumption in the iron and steel industry to do a good job in the recovery and comprehensive utilization of waste heat from blast furnace slag. [0003] Blast furnace slag is mainly used for the development of building mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C11/00
Inventor 李保卫张雪峰贾晓林高园园冯诗超薛天白
Owner INNER MONGOLIA UNIV OF SCI & TECH
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