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Method for preparing micro crystal glass plate for building using waste glass

A technology for glass-ceramics and construction, which is applied in the field of preparation of glass-ceramics for construction, and can solve problems such as high production costs, difficult crystallization, and environmental pollution, and achieve good economic and social benefits, and product additional The effect of high value and reduction of production cost

Inactive Publication Date: 2005-08-03
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difference between these two processes is only the molding and crystallization methods, but they have one thing in common, that is, the ingredients must first be melted into a glass with a specific composition, so that crystals can be precipitated in the subsequent heat treatment or sintering process, resulting in The problems are: (1) high glass melting temperature (1450-1550°C), high energy consumption, and pollution to the environment; (2) complex production process and high production cost; (3) complex and fluctuating components of industrial waste residues, which affect production Process control of specific composition glasses creates difficulties
Application No. 00103134 discloses a glass crystal brick decorative building material made of cullet and its manufacturing method. 40-70% of waste glass is mixed with clay and kaolin powder and a small amount of coloring material is added, and sintered at 950-1100°C to form a However, due to the composition of ordinary soda-lime glass, the crystallization ability of waste glass is very weak, and it is difficult to crystallize even if it is sintered in a powder state. Therefore, the technology of directly using waste glass as raw material to produce glass-ceramics is still rarely reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Preparation of diopside glass-ceramics. First prepare the chemical composition expressed as (wt%) in the form of oxide: SiO 2 58.4-62.2, Al 2 o 3 18.0-22.8, MgO 13.3-16.8, CaO 0.3-0.7, K 2 O 1.1-1.5, Fe 2 o 3 0.2-0.6, Na 2 O 0.04-0.08 diopside crystallization accelerator: take 610 parts of quartz sand, 220 parts of aluminum oxide, 158 parts of magnesium oxide, and 14 parts of potassium hydroxide, put them into a heating furnace after mixing, and heat at 1100 ° C for 2 -5 hours, after cooling, pulverize and sieve to obtain 400 mesh diopside type crystallization accelerator powders, and its composition is expressed as (wt%) in the form of oxides: SiO 2 59.9, Al 2 o 3 21.8, MgO 15.3, CaO 0.3, K 2 O 1.2, Fe 2 o 3 0.5, Na 2 O 0.08. Sorting and cleaning the waste glass, crushing the colorless window glass, ball milling, sieving into glass powders of 75 mesh-300 mesh and 16 mesh-28 mesh, mixing according to the ratio of 8:2, adding 30% by weight ...

Embodiment 2

[0008] Example 2: Preparation of glass-ceramics mixed with soda calcium feldspar and wollastonite. First prepare the chemical composition expressed as (wt%) in the form of oxide: SiO 2 27.0-31.8, CaO 66.4-71.4, K 2 O 1.1-1.5, Na 2 O 0.4-0.8 wollastonite-type devitrification promoter and chemical composition are expressed as (wt%) in the form of oxides: SiO 2 41.31-44.2, Al 2 o 3 22.4-26.39, MgO 2.26, CaO 26.20-30.47, K 2 O 1.02-1.43, Fe 2 o 3 2.30-2.52, Na 2 O0.15-0.19, TiO 2 0.00-1.32 sodium calcium feldspar crystallization accelerator. Take 300 parts of quartz sand, 1250 parts of calcium carbonate, and 14 parts of potassium hydroxide, mix them and put them in a heating furnace, heat them at 1000-1200 ° C for 2-5 hours, cool, pulverize and sieve to obtain 300-mesh wollastonite analysis. Crystal accelerator powder, analysis of its composition expressed in the form of oxides (wt%): SiO 2 28.5, CaO 69.1, K 2 O 1.3, Na 2 O 0.5; Take 430 parts of quartz sand, 500...

Embodiment 3

[0009] Example 3: Preparation of leucite glass-ceramics. First, the chemical composition is expressed as (wt%) in the form of oxides: SiO 2 48.2-52.8, Al 2 o 3 24.8-28.7, MgO 0.0-0.2, CaO 0.3-0.4, K 2 O 20.2-25.4, Fe 2 o 3 0.2-0.4, Na 2 O 0.6-0.8 leucite-type crystallization accelerator: fired into a leucite-type crystallization accelerator. Take 510 parts of quartz sand, 270 parts of alumina, and 280 parts of potassium hydroxide, mix them and put them in a heating furnace, heat them at 1000-1200 ° C for 2-5 hours, cool and pulverize them to obtain a 500-mesh leucite-type crystallization accelerator Powder, analysis of its composition expressed as (wt%) in the form of oxides: SiO 2 49.8, Al 2 o 3 25.8, MgO 0.1, CaO 0.3, K 2 O 22.6, Fe 2 o 3 0.2, Na 2 O 0.7. Sorting and cleaning the waste glass, crushing the colorless window glass, ball milling, sieving into glass powders of 75 mesh-300 mesh and 16 mesh-28 mesh, mixing according to the ratio of 7:3, adding 4...

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Abstract

The preparation process of micro crystal glass plate for building with waste glass as material includes the following technological steps: sorting waste glass, cleaning, crushing, ball milling, sieving, adding devitrifying promoter, mixing, sintering reaction to devitrify, mechanical surface grinding and polishing. The present invention features that the crystal is not separated out from glass but formed through the reaction between the glass powder and the devitrifying promoter during sintering. The separated crystal is controlled with the type of added devitrifying promoter and not dependent on the glass components. Without the step of smelting glass with special components, the present invention has simple process, low power consumption and low cost, and opens one way for the utilization of waste glass.

Description

technical field [0001] The invention relates to a method for preparing glass-ceramic plates for building, in particular to a method for preparing glass-ceramics by directly adding silicate compound crystallization accelerators and sintering waste glass as the main raw material. Background technique [0002] Glass-ceramics, also known as glass ceramics, is a composite material composed of crystals and glass, which is prepared by crystallizing a certain composition of glass. Glass-ceramic plates for buildings are the latest high-end building materials for decorating luxurious buildings in the world today. Their physical and chemical properties and decorative effects are far superior to those of single glass, ceramics, natural marble and granite. Favored by architectural designers and users, it is widely used in squares, hotels, shopping malls, entertainment venues, family houses and other occasions, and is known as a new top material in the world's architectural decoration ind...

Claims

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Application Information

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IPC IPC(8): C03C6/02C03C10/00
CPCC03C10/00C03C3/087C03C3/091
Inventor 章为夷
Owner DALIAN JIAOTONG UNIVERSITY
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