A method for preparing glass-ceramics by using molten blast furnace slag

A technology of glass-ceramics and blast furnace slag, which is applied in the field of building decoration materials, can solve the problems of different types of crystal nucleating agents, different product performance and uses, etc., achieve short heat preservation time, realize the cycle of energy and economy, and reduce environmental pollution Effect

Active Publication Date: 2019-10-25
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above research patents are all aimed at the preparation of glass-ceramics from secondary resources such as slag, tailings and fly ash. Due to the different basic raw material components, different types of crystal nucleating agents, and different product performance and uses, each Seed system has limitations

Method used

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  • A method for preparing glass-ceramics by using molten blast furnace slag
  • A method for preparing glass-ceramics by using molten blast furnace slag
  • A method for preparing glass-ceramics by using molten blast furnace slag

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Experimental program
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Effect test

Embodiment 1

[0027] A method for preparing glass-ceramics by using molten blast furnace slag specifically includes the following steps:

[0028] (1) Molten blast furnace slag is used as the main additive, the content is 48.7% of the total batch mass, and the auxiliary materials are 36.16% of quartz, 3.88% of alumina, 3.46% of magnesium oxide, 0.47% of manganese dioxide, and 0.25% of iron oxide. , 0.91% of titanium oxide, 1.45% of barium carbonate, 4.72% of sodium fluorosilicate, and a batch material for glass-ceramics; the chemical composition of blast furnace slag is calculated by mass percentage: SiO 2 36.77%, Al 2 O 3 14.45%, CaO 39.03%, MgO 7.84%, Fe 2 O 3 0.28%, TiO 2 0.79%, Na 2 O 0.24%, K 2 O 0.34%, MnO 0.16%, BaO 0.1%;

[0029] (2) Grind the batch material obtained in step (1) for 1 hour in a ball milling tank, fully uniform, put it into a corundum crucible, place in an electric furnace, and melt in an air atmosphere, and keep it at a temperature of 1350℃ for 4 hours to obtain a clari...

Embodiment 2

[0034] A method for preparing glass-ceramics by using molten blast furnace slag specifically includes the following steps:

[0035] (1) Molten blast furnace slag is used as the main additive, the content is 53.8% of the total batch mass, and the auxiliary materials are 32.39% of quartz, 3.15% of alumina, 4.89% of magnesium oxide, 0.46% of manganese dioxide, and 0.24% of iron oxide. , Titanium oxide 0.86%, Barium carbonate 1.45%, Sodium fluorosilicate 2.76%, mix with glass-ceramic batch materials; The chemical composition of blast furnace slag is calculated by mass percentage: SiO 2 35.78%, Al 2 O 3 14.94%, CaO 39.53%, MgO 7.84%, Fe 2 O 3 0.28%, TiO 2 0.79%, Na 2 O 0.24%, K 2 O 0.34%, MnO 0.16%, BaO 0.1%;

[0036] (2) Grind the batch material obtained in step (1) for 1.5h in a ball mill tank, fully uniform, put it into a corundum crucible, place it in an electric furnace, and melt it in an air atmosphere, and hold it at a temperature of 1400°C for 3h. Clear and uniform molten gla...

Embodiment 3

[0041] A method for preparing glass-ceramics by using molten blast furnace slag specifically includes the following steps:

[0042] (1) Molten blast furnace slag is used as the main additive, the content is 58.9% of the total batch mass, and the auxiliary materials are 28.6% of quartz, 2.41% of alumina, 2.13% of magnesium oxide, 0.46% of manganese dioxide, and 0.23% of iron oxide. , Titanium oxide 0.82%, Barium carbonate 1.44%, Sodium fluorosilicate 5.01%, the batch material for the configuration of glass-ceramic; The chemical composition of the blast furnace slag is calculated by mass percentage: SiO 2 36.28%, Al 2 O 3 14.94%, CaO 39.03%, MgO 7.84%, Fe 2 O 3 0.28%, TiO 2 0.79%, Na 2 O 0.24%, K 2 O 0.34%, MnO 0.16%, BaO 0.1%;

[0043] (2) Grind the batch material obtained in step (1) in a ball milling tank for 2 hours, fully uniform, put it into a corundum crucible, place in an electric furnace, and melt in an air atmosphere. The temperature is 1450℃ and the holding time is 2 hou...

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Abstract

The invention belongs to the field of glass and particularly relates to a method for preparing microcrystalline glass by utilizing molten blast furnace slag. The method mainly comprises the followingsteps: taking the blast furnace slag as a main additive and adding an auxiliary material to prepare a mixture of the microcrystalline glass; melting the mixture and adding a microcrystalline glass clinker crystallizing agent at the thermal insulation stage at which the melting process is about to end; directly forming molten glass wrapped with the microcrystalline glass clinker crystallizing agent, quickly and directly performing glass micro-crystallization treatment on a glass plate by adopting a circular trapezoidal temperature system in a high-temperature state after forming and de-molding,annealing along with a furnace and cooling a room temperature to obtain the microcrystalline glass. The method provided by the invention has the benefits that the microcrystalline glass is directly prepared by the molten blast furnace slag; microcrystalline glass clinker of the same system is taken as the crystallizing agent to promote the further glass crystallization; the circular trapezoidal temperature system is adopted for the glass micro-crystallization treatment to maximize the effect of the microcrystalline glass clinker crystallizing agent and ensure the micro-crystallization effect;the high-temperature direct crystallization is adopted in the crystallization process, so that the microcrystalline glass with better structure and performance is obtained.

Description

Technical field [0001] The invention relates to a method for preparing glass-ceramics using blast furnace slag, and belongs to the field of building decoration materials. Background technique [0002] Blast furnace slag is the main by-product of blast furnace production and is an industrial solid waste. Water slag is to quench the molten blast furnace slag with water or a mixture of water and air to make it into a sand-like substance. This is also the main method of processing blast furnace slag in my country. This substance will occupy land, waste resources and pollute the environment. After the middle of the 20th century, the comprehensive utilization of blast furnace slag in foreign countries has developed rapidly. At present, many countries such as the United States, Britain, France, Germany, Canada have achieved slag discharge that year, and they have been used up that year and all have been resourced. China currently produces 150 million tons of slag per year. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C6/10C03C3/112C03C10/00
CPCC03C1/002C03C3/112C03C10/0036
Inventor 何峰王立格谢峻林刘小青
Owner WUHAN UNIV OF TECH
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