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Porous devitrified glass and manufacturing method thereof

A technology of porous glass-ceramic and its manufacturing method, which is applied in the field of glass-ceramic filter materials, can solve the problems of low compressive and flexural strength, low crystallization rate, etc., and achieve the effects of reducing tax, saving land, and reducing environmental pollution

Inactive Publication Date: 2008-12-24
内蒙古科韵环保材料股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to add additives and nucleating agents in the manufacturing process, and the crystallization rate is low, and the compressive and flexural strengths are small. It is mainly used as a thermal insulation component of composite wall materials and cannot be used as a filter material.

Method used

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  • Porous devitrified glass and manufacturing method thereof
  • Porous devitrified glass and manufacturing method thereof
  • Porous devitrified glass and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Formula: The fly ash used is taken from the No. 1 thermal power plant in the suburbs of Baotou City, and the rare earth tailings powder is taken from Baotou Iron and Steel Rare Earth Plant. The chemical composition is shown in Table 1 and Table 2, and the particle size is 200 mesh. The chemical composition (wt%) of the base glass is:

[0032]

[0033] 2. Batching and mixing: according to mass percentage: 20% fly ash, 27% rare tailings powder, 30% quartz sand, 16% dolomite, 7% spodumene for batching. Mix with a disc mixer, and the mixing time is 3-5min.

[0034] 3. Melting and water quenching: Put the uniformly mixed raw materials into a crucible furnace to melt, the melting temperature is 1450°C, and the melting time is 2.5 hours. The melted glass liquid is quickly poured into cold water to obtain water quenched glass Granules, dried and stored for later use.

[0035] 4. Preparation and molding of glass powder: Grind the dried glass particles on a ball mill so that...

Embodiment 2

[0039] 1. Material selection: The fly ash used is taken from the No. 2 thermal power plant in the suburbs of Baotou City, and the rare earth tailings powder is taken from Baotou Iron and 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:

[0040]

[0041]2. Batching and mixing: according to mass percentage: 17% fly ash, 35% rare tailings powder, 25% quartz sand, 19% dolomite, 4% spodumene for batching. Mix with a disc mixer, and the mixing time is 3-5min.

[0042] 3. Melting and water quenching: Put the uniformly mixed raw materials into a crucible furnace to melt, the melting temperature is 1450°C, and the melting time is 2.5 hours, then pour the melted glass into cold water quickly to obtain water quenched glass. Glass granules, dry them and save them for later use.

[0043] 4. Preparation and molding of glass powder: Grind dry glass particles on a ball...

Embodiment 3

[0047] 1. Material selection: The fly ash used was taken from the No. 1 Thermal Power Plant in the suburbs of Baotou, and the rare-earth tailings powder was taken from Baotou Iron and Steel Rare Earth Plant. The chemical composition is shown in Table 1 and Table 3, and the particle size is 200 mesh. The chemical composition (wt%) of the base glass is:

[0048]

[0049] 2. Ingredients: According to the mass percentage: 30% fly ash, 28% rare tailings powder, 21% quartz sand, 18% dolomite, 3% spodumene for ingredients. Mix with a disc mixer, and the mixing time is 3-5min.

[0050] 3. Melting and water quenching: Put the uniformly mixed raw materials into a crucible furnace to melt, the melting temperature is 1460°C, and the melting time is 3 hours, then pour the melted glass into cold water quickly to obtain water-quenched glass Granules, dried and stored for future use.

[0051] 4. Preparation and molding of glass powder: Grind the dried glass particles on a ball mill so th...

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Abstract

The invention relates to a porous glass-ceramics and a method for preparing the same belonging to the glass-ceramics filter material field, which is characterized by preparing a glass powder of CaO-MgO-Al2O3-SiO2 system by means of water quenching using fly ash and rare earth tailings as raw materials; preparing the porous glass-ceramics mainly open pores by adding pore formers. The rare earth tailings of the invention not only contains the main chemical compositions for preparing the glass-ceramics, but also contains rare earth, niobium and fluorite as composite nucleating agents which can reduce the nucleation activation energy, improve the nucleation and crystallization of the glass to make the microcrystalline finer, thereby improving the mechanical property of the glass-ceramics. Meanwhile the cost for preparing the porous glass-ceramics is greatly reduced and the high intensity communicating pore porous glass-ceramics which satisfies different filtration objects with an adjustable porosity and pore size distribution are obtained by adjusting the species, granularity, dosage and forming pressure of the pore formers.

Description

1. Technical field: [0001] The invention relates to a porous glass-ceramic and a manufacturing method thereof, belonging to the field of glass-ceramic filter materials. 2. Background technology: [0002] my country is a country with serious environmental pollution. Among them, water pollution is an important aspect. At present, my country's water pollution control technology is still underdeveloped, which affects the effect of treatment. Therefore, it is urgent to increase water pollution control efforts. In the future, my country's environmental protection industry, especially the water treatment industry, will develop very rapidly. [0003] The filter material is a kind of light weight, porous material that can filter and purify solutions or gases, and is an environmentally friendly material. This kind of material is not only used for the filtration and purification of gases and liquids, but also for the adsorption, catalysis and ion exchange of gases and liquids. Ther...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03C6/10
Inventor 李保卫贾晓林闫红宾张雪峰
Owner 内蒙古科韵环保材料股份公司
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