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Method for manufacturing microcrystalline glass by cyanite tailing

A technology for kyanite tailings and glass-ceramics, which is applied in the field of building material synthesis to achieve the effects of low cost and energy consumption, high utilization rate of tailings, and pollution reduction.

Inactive Publication Date: 2011-09-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the use of kyanite ore tailings to produce glass-ceramics has not been reported

Method used

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  • Method for manufacturing microcrystalline glass by cyanite tailing
  • Method for manufacturing microcrystalline glass by cyanite tailing
  • Method for manufacturing microcrystalline glass by cyanite tailing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Within the composition range of each chemical substance that can form glass-ceramics designed in the present invention, select according to the mass fraction of batching: tailings 64.6% after pretreatment, Al 2 o 3 10.0﹪, CaO 16.2﹪, Na 2 CO 3 3.0% TiO2 2 1.2%, BaO 2.4%, ZnO 2.6%. After mixing evenly, melt at a high temperature of 1200°C, quench the molten slurry in water, collect the quenched small particle frit, dry it, crush it to 200 mesh with a ball mill, add 2% polyvinyl alcohol, and carry out Granulate. Then use the corresponding mold to press it into the desired shape under the pressure of 20MPa, and conduct heat treatment at a heating rate of 4°C / min. Select the heat treatment system of nucleation at 800°C for 2 hours and crystallization at 920°C for 2 hours for heat treatment, and natural annealing to obtain glass ceramics. figure 2 It is the SEM picture corresponding to magnification of 5500 times.

Embodiment 2

[0030] Selected according to the mass fraction of the ingredients: 70.3% of tailings after pretreatment, Al 2 o 3 6.3%,CaO 15.2%,Na 2 CO 3 2.0% TiO2 2 1.0%,P 2 o 5 0.3%, BaO 2.3%, ZnO 2.6%. After mixing evenly, melt at a high temperature of 1300°C, quench the molten slurry in water, collect the quenched small particle frit, dry it, crush it to 200 mesh with a ball mill, add 1% polyvinyl alcohol, and carry out Granulate. Then use the corresponding mold to press it into the desired shape under the pressure of 40MPa, and conduct heat treatment at a heating rate of 3°C / min. Select the heat treatment system of nucleation at 810°C for 2 hours and crystallization at 940°C for 2 hours for heat treatment, and natural annealing to obtain glass-ceramics.

Embodiment 3

[0032] Select according to the mass fraction of ingredients: tailings after pretreatment 55.5%, Al 2 o 3 8.7﹪, CaO 22.0﹪, Na 2 CO 3 5.2%,Cr 2 o 3 1.6%, BaO 3.3%, ZnO 3.7%. After mixing evenly, melt at a high temperature of 1400°C, quench the molten slurry in water, collect the quenched small particle frit, dry it, crush it to 200 mesh with a ball mill, add 2.2% polyvinyl alcohol, and carry out Granulate. Then use the corresponding mold to press it into the desired shape under the pressure of 80MPa, and conduct heat treatment at a heating rate of 3°C / min. Select the heat treatment system of nucleation at 800°C for 3 hours, heating to 915°C for crystallization for 3 hours for heat treatment, and natural annealing to obtain glass-ceramics.

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Abstract

The invention discloses a method for manufacturing microcrystalline glass by cyanite tailings, belonging to the technical field of building material synthesis. The production technology comprises the following steps: according to parts by weight, except the tailings pre-processed by cyanite, choosing other ingredients in the following range: 2-6 parts of Na2O3, 6-10 parts of Al2O3, 2-4 parts of ZnO2, 15-22 parts of CaO, 2-4 parts of BaO and 0-3 parts of TiO2 / P2O5 / Cr2O3, wherein the amount of above raw materials is determined at will within the respective range, and the pre-processed tailings are added according to the rest ratio of percentage by weight; evenly mixing, melting, carrying out water quenching, and grinding; adding 1-3% polyvinyl alcohol (PVA); pressing and shaping at the intensity of pressure of 20-110MPa; carrying out heat treatment, wherein the specific heat treatment rule is as follows: heating speed is 2-4DEG C / min, temperature is kept for 1.5-3 hours after being raised to 750-820DEG C, nucleus formation is carried out, and temperature is kept for 1.5-3 hours for crystallization when temperature is continuously raised to 880-950DEG C; and naturally cooling to prepare the microcrystalline glass. The method has the advantages of low cost and energy consumption and high tailing use ratio, develops a new path for utilizing the cyanite tailings, lightens environmental pollution by the cyanite tailings and has a profound environmental protection meaning.

Description

technical field [0001] The invention belongs to the technical field of building material synthesis, and in particular provides a method for manufacturing glass-ceramics by using kyanite tailings, which is suitable for industrial production. Background technique [0002] Glass-ceramics, also known as ceramic glass, is a kind of polycrystalline solid material containing a large number of microcrystalline phases and glass phases, which is obtained by controlling the crystallization of basic glass with a specific composition during the heating process. It is a new type of building material. . Glass-ceramics combines the superior physical and chemical properties and mechanical properties of glass and ceramics. It has beautiful color, exquisite surface patterns, high strength and hardness, no fading, good corrosion resistance, low water absorption, and no radiation. It is better than natural marble. Good brightness. This glass-ceramic is suitable for the decoration of the inner ...

Claims

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Application Information

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IPC IPC(8): C03C10/14C03C6/10
Inventor 弓爱君周伟华曹艳秋原小涛邱丽娜柴成文叶亚平
Owner UNIV OF SCI & TECH BEIJING
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