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Low-expansion micro-crystal glass manufactured from high-silicon iron tailings and preparation method thereof

A technology of high-silicon iron tailings and glass ceramics, which is applied in the field of solid waste resource utilization, can solve the problems of aggravating the erosion of glass liquid on refractory materials of kilns, erosion of refractory materials of furnaces, and high melting temperature of glass, so as to improve the efficiency of melting furnaces , Reduce erosion, improve product performance

Inactive Publication Date: 2011-11-02
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of existing glass batch materials are: high cost of raw materials; high melting temperature of glass, generally between 1600-1650 °C, which will inevitably increase fuel consumption and intensify the erosion of glass liquid on refractory materials of kilns; chemical raw materials and Compared with mineral raw materials, under the same conditions of oxide composition and melting temperature, the more chemical raw materials in the glass batch, the more severe the corrosion of the furnace refractory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The glass batch is made by weighing and mixing, and its composition by weight is: iron tailings 30, quartz 45, alumina 17, lithium carbonate 9.6, zinc oxide 1, barium carbonate 2, boric acid 0.8, titanium oxide 2. Zirconia2.

[0035] Put the above-mentioned glass batch in a crucible kiln, melt it at 1600°C for 4 hours, pour the molten glass into a disc with a diameter of 100 mm and a thickness of 5 mm, and immediately send it to a chamber furnace for annealing. The temperature is 680°C, and the annealing time is 1 hour. After the annealing is completed, the temperature is raised directly for nucleation and crystallization treatment. The nucleation temperature is 700°C, the nucleation time is 1.5 hours, the crystallization temperature is 810°C, and the crystallization time is 2 hours. After the crystallization is completed, the treated glass is taken out of the chamber furnace and cooled to room temperature at a rate of 5°C / hour to obtain a low-expansion glass-ceramic s...

Embodiment 2

[0037] The glass batch is made by weighing and mixing, and its composition by weight is: iron tailings 35, quartz 40, alumina 18, lithium carbonate 7.6, zinc oxide 1, barium carbonate 2, boric acid 0.8, titanium oxide 4. Zirconia 1.

[0038] Put the above-mentioned glass batch in a crucible kiln, melt it at 1580°C for 4 hours, pour the melted glass into a disc with a diameter of 100 mm and a thickness of 5 mm, and immediately send it to a chamber furnace for annealing. The temperature is 670°C, and the annealing time is 1 hour. After the annealing is completed, the temperature is raised directly for nucleation and crystallization treatment. The nucleation temperature is 700°C, the nucleation time is 1.5 hours, the crystallization temperature is 950°C, and the crystallization time is 2 hours. After the crystallization is completed, the treated glass is taken out of the chamber furnace and cooled to room temperature at a rate of 5°C / hour to obtain a low-expansion glass-ceramic ...

Embodiment 3

[0040] The glass batch material is prepared by weighing and mixing, and its composition in parts by weight is: 35 iron tailings, 40 quartz, 18 aluminum oxide, 9.6 lithium carbonate, 2 barium carbonate, 2 titanium oxide, and 2 zirconium oxide.

[0041] Put the above-mentioned glass batch in a crucible kiln, melt it at 1560°C for 4 hours, pour the molten glass into a disc with a diameter of 100 mm and a thickness of 5 mm, and immediately send it to a chamber furnace for annealing. The temperature is 620°C, and the annealing time is 1 hour. After the annealing is completed, the temperature is raised directly for nucleation and crystallization treatment. The nucleation temperature is 680°C, the nucleation time is 1.5 hours, the crystallization temperature is 780°C, and the crystallization time is 2 hours. After the crystallization is completed, the treated glass is taken out of the chamber furnace and cooled to room temperature at a rate of 5°C / hour to obtain a low-expansion glass...

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Abstract

The invention relates to low-expansion micro-crystal glass manufactured from high-silicon iron tailings and a preparation method thereof. The low-expansion micro-crystal glass provided by the invention is characterized by comprising the following raw materials in parts by weight: 30-35 parts of iron tailings, 40-45 parts of quartz, 16-18 parts of aluminum oxide, 5-10 parts of lithium carbonate, 0.2-2 parts of zinc oxide, 0.1-2 parts of barium carbonate, 0.1-1 part of boracic acid, 1-4 parts of titanium oxide and 1-4 parts of zirconium oxide, wherein the total quantity of the zinc oxide, the barium carbonate and the boracic acid is 1-4 parts; and the total quantity of the titanium oxide and the zirconium oxide is 3-5 parts. The preparation method provided by the invention comprises the following steps: adding micro-crystal glass mixtures to a kiln to be melted into molten glass; after pouring and molding, instantly adding the molten glass after melting to the kiln for annealing; after completing annealing, directly rising the temperature to carry out coring and crystallization processing; and carrying out air cooling to room temperature to obtain finished low-expansion micro-crystal glass. The invention reduces the stacking quantity of tailings, lightens environmental pollution, realizes the comprehensive utilization of resources, can improve the performance of a product and lowers production cost.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource utilization, in particular to a low-expansion glass-ceramic made from high-silicon iron tailings and a manufacturing method thereof. Background technique [0002] Glass-ceramic is a polycrystalline material obtained by controlling the crystallization of glass. Low-expansion glass-ceramic mainly refers to Li 2 O-Al 2 o 3 -SiO 2 System glass-ceramic. Because it has excellent properties in four aspects: temperature shock resistance, high frequency insulation, high mechanical strength, and high chemical stability, it can be widely used in astronomical telescopes, high-temperature electric light source glass, laboratory heating appliances, high-temperature thermal Exchangers, substitute quartz glass, high-temperature windows, cooking utensils, tableware and other fields have now become an important branch of glass-ceramic and even material science. Li with the proper composition 2 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14
Inventor 刘雁翎
Owner ANSTEEL GRP MINING CO LTD
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