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Method for preparing high-strength wear-resistant glass-ceramic by using iron tailings

A technology for glass-ceramics and iron tailings, which is applied in the field of preparing high-strength and wear-resistant glass-ceramics by using iron tailings, can solve the problems of high cost, reducing the density of glass-ceramics, mechanical properties and service performance, and complicated processes, and achieves the The effect of reducing the cost of raw materials

Active Publication Date: 2016-01-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, CMAS glass-ceramic is usually prepared by sintering method, but the disadvantage of sintering method is that the process is more complicated and the cost is higher, and the prepared glass-ceramic sample has surface pores, cracks, seesaws, etc. and other shortcomings, which to a certain extent reduce the density, mechanical properties and performance of glass-ceramics

Method used

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  • Method for preparing high-strength wear-resistant glass-ceramic by using iron tailings
  • Method for preparing high-strength wear-resistant glass-ceramic by using iron tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1. A method for preparing high-strength wear-resistant glass-ceramics using iron tailings, followed by the following steps:

[0030] 1) Ingredients:

[0031] The raw materials are composed of the following parts by weight: 35 parts of iron tailings, 25 parts of quartz, 10 parts of magnesium carbonate, 15 parts of alumina, 3 parts of calcium oxide, 6 parts of titanium oxide, 5 parts of boron oxide, and 1 part of antimony oxide.

[0032] 2). The above raw materials are mixed by mechanical ball milling, and the ball milling time is 6 hours;

[0033] 3). Melt the mixed raw materials obtained in step 2) at 1450~1500℃ for 4 hours;

[0034] 4) Press or calender the molten glass to prepare plate glass (length, width, and thickness are 100mm, 40mm, and 5mm, respectively);

[0035] 5) Send the above-mentioned plate glass to an annealing furnace for annealing, at an annealing temperature of 580°C, and cool down in the furnace after annealing for 1 hour; obtain annealed glass;

[0036]...

Embodiment 2

[0038] Example 2. A method for preparing high-strength wear-resistant glass-ceramics using iron tailings,

[0039] The ingredients are:

[0040] The raw materials are composed of the following parts by weight: 40 parts of iron tailings, 20 parts of quartz, 12 parts of magnesium carbonate, 13 parts of alumina, 4 parts of calcium oxide, 7 parts of titanium oxide, 3 parts of boron oxide, and 1 part of antimony oxide.

[0041] The preparation method is the same as in Example 1.

[0042] The main crystal phase of the prepared glass-ceramic product is cordierite with hexagonal crystal phase, the crystal grain size is about 10 microns, the whole is crystallized, the appearance is black, the gloss is good, the Vickers hardness ≥ 8.2 GPa, the flexural strength ≥ 125 MPa .

Embodiment 3

[0043] Example 3: A method for preparing high-strength wear-resistant glass-ceramics using iron tailings,

[0044] The ingredients are:

[0045] The raw materials are composed of the following parts by weight: 37 parts of iron tailings, 23 parts of quartz, 11 parts of magnesium carbonate, 14 parts of alumina, 4 parts of calcium oxide, 6 parts of titanium oxide, 4 parts of boron oxide, and 1 part of antimony oxide.

[0046] The preparation method is the same as in Example 1.

[0047] The main crystal phase of the prepared glass-ceramic product is cordierite with hexagonal crystal phase, the crystal grain size is about 10 microns, the whole is crystallized, the appearance is black, the gloss is good, the Vickers hardness is ≥8.8GPa, and the flexural strength is ≥134MPa .

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Abstract

The invention discloses a method of preparing high-strength wear-resisting glass ceramics by utilizing iron tailings. The method comprises the following steps of preparing raw materials comprising the following components in parts by weight: 35-40 parts of iron tailings, 20-25 parts of quartz, 10-12 parts of magnesium carbonate, 13-15 parts of aluminum oxide, 3-4 parts of calcium oxide, 6-7 parts of titanium oxide, 3-5 parts of boron oxide and 1 part of antimony oxide; mixing the materials, fusing the materials at 1450 DEG C-1500 DEG C, preserving the heat, carrying out compression molding or calendaring molding on the obtained molten glass, annealing plate-shaped glass and then preserving the heat for 3-5 hours at 950 DEG C-1000 DEG C, and cooling to the room temperature to obtain the high-strength wear-resisting glass ceramics. The method is a preparation method of CMAS glass ceramics, which takes iron tailings as main materials and realizes integral crystallization.

Description

Technical field [0001] The invention relates to a method for preparing high-strength wear-resistant glass-ceramics, in particular to a method for preparing high-strength wear-resistant glass-ceramics using iron tailings. Background technique [0002] my country’s iron tailings generate hundreds of millions of tons each year, which pollutes the environment and also puts tremendous pressure on the society. Not only does it occupy a large amount of arable land, but the dried tailings and fly ash will form dust when exposed to strong winds. Excessive or overloaded use of tailings ponds and red mud ponds, or even illegal operations, will bring great safety hazards and pose a serious threat to the people's property and lives in the surrounding areas. This is a problem that the country needs to solve urgently. There is an urgent need to solve the problem of serious damage to the ecological environment by waste residues while achieving maximum use of waste. [0003] CaO-MgO-Al 2 O 3 -SiO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/08C03C6/10
Inventor 郭兴忠杨辉王长林温计格杨广跃
Owner ZHEJIANG UNIV
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