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Ecological glass-ceramic and preparation method thereof

A glass-ceramic and ecological technology, applied in the field of ecological glass-ceramic and manufacturing, can solve problems such as insufficient utilization and increase production costs, and achieve the effects of solving environmental pollution and safety problems, saving costs, and improving utilization.

Inactive Publication Date: 2008-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These researches are solely using coal gangue or rare tailings to produce glass-ceramics, which cannot make full use of various mineral wastes and will inevitably increase production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Coal gangue from Hebei Fengfeng Coal Mine and Baotou Iron and Steel Rare Earth tailings are used. According to the chemical composition of these two minerals, the ingredients are formulated according to the weight ratio: 30% coal gangue, 30% thinning tailings, 30% quartz sand, 5% limestone, Waste glass 5%. Mix the prepared raw materials with a ball mill, and the mixing time is 60 minutes. The ball-milled powder is melted in a high-temperature furnace with a melting temperature of 1350°C and a holding time of 60 minutes. Quenching the glass melt into glass particles, ball milling, drying, and sieving to obtain glass powder with a particle size of less than 2mm, put it into a mold, press it into a high-temperature furnace, raise the temperature at 2°C / min to 600°C and keep it for 120min, then Raise the temperature at 2°C / min to 700°C for 120 minutes, then cool down to room temperature with the furnace, and finally undergo surface treatment such as cutting, grinding, and ...

Embodiment 2

[0023] Coal gangue from Hebei Fengfeng Coal Mine and Baotou Iron and Steel Rare Earth tailings are used. According to the chemical composition of these two minerals, the ingredients are formulated according to weight ratio: 50% coal gangue, 10% rare tailings, 30% quartz sand, 6% limestone, Waste glass 4%. Mix the prepared raw materials with a ball mill, and the mixing time is 300 minutes. The ball-milled powder is melted in a high-temperature furnace with a melting temperature of 1500°C and a holding time of 200 minutes. The glass melt is quenched into glass particles, ball milled, dried and sieved to obtain glass powder with a particle size of less than 2mm, which is put into a mold and pressed into a mold. Heating at 5°C / min to 700°C for 120min, then cooling to room temperature with the furnace, and finally cutting, grinding, polishing and other surface treatments to obtain ecological glass-ceramics. The compressive strength of the glass-ceramic is 480MPa, the bending stre...

Embodiment 3

[0025] Coal gangue from Hebei Fengfeng Coal Mine and Baotou Iron and Steel Rare Earth tailings are used. According to the chemical composition of these two minerals, the ingredients are formulated according to weight ratio: 70% coal gangue, 10% rare tailings, 10% quartz sand, 5% limestone, Waste glass 5%. Mix the prepared raw materials with a ball mill, and the mixing time is 300 minutes. The ball-milled powder is melted in a high-temperature furnace, the melting temperature is 1600°C, and the holding time is 200 minutes. Quenching the glass melt into glass particles, ball milling, drying, and sieving to obtain glass powder with a particle size of less than 2mm, which is put into a mold and pressed into a mold, and put into a high-temperature furnace to heat up to 850°C at 10°C / min for 60 minutes, and then Heating at 5°C / min to 1000°C for 60min, then cooling down to room temperature with the furnace, and finally cutting, grinding, polishing and other surface treatments to obt...

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Abstract

The invention relates to ecological glass ceramics and a preparation method thereof. The ecological glass ceramics adopts coal gangue of coal wastes as main raw material, quartz sand, limestone, waste glass, etc., as auxiliary raw materials and rich cebaite gangue as raw material of a nucleating agent. The compositions and weight percentage contents are as follows: 40-70 percent of SiO2, 10-20 percent of CaO, 5-15 percent of Al2O3, 1-10 percent of Fe2O3, 1-5 percent of BaO, 0.1-3 percent of F, 0.5-3 percent of TiO2 and 1-5 percent of rear earth oxides. The invention comprehensively utilizes the coal wastes such as the coal gangue, the rich cebaite gangue, etc., as raw material to prepare the glass ceramics, which not only saves cost and improves the usage efficiency of mineral wastes but also settles environmental pollution and safety problems caused by pile-up mineral mining wastes. The ecological glass ceramics of resource recycling can be used as the materials of high-grade building decoration and industry.

Description

technical field [0001] The invention relates to an ecological glass-ceramic and a manufacturing method, belonging to the field of comprehensive utilization of industrial waste. Background technique [0002] Glass-ceramics is a multi-phase solid material containing a large number of microcrystals obtained by controlling the crystallization of glass during heat treatment. Because glass-ceramics has comprehensive properties such as high strength, low expansion, corrosion resistance, wear resistance, and low dielectric loss, it shows a wide range of application prospects. The production of glass-ceramics by using mineral waste such as coal gangue and rare tailings can turn waste into treasure, which can not only protect the ecological environment, but also regenerate resources, which is in line with my country's sustainable development strategy. Chinese patent CN1216737C utilizes coal gangue to manufacture glass-ceramic composite plates. Chinese patent CN101024554A utilizes ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02C03B32/02
Inventor 朱丽萍翁文剑徐利华苗顺东
Owner ZHEJIANG UNIV
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