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Method for preparing microcrystalline glass by utilization of red mud-fly ash-titanium slag

A technology of glass-ceramics and fly ash, applied in the field of utilization of industrial solid waste resources, can solve the problem of low waste residue content, achieve the effects of protecting the environment, reducing costs, and saving resources

Inactive Publication Date: 2014-07-16
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing glass-ceramics by using industrial waste slag red mud-fly ash-titanium slag as the main raw material, the amount of waste slag can reach more than 90%, which overcomes the defect of low amount of waste slag in the existing method , and this method is simple in process, low in production cost, and can meet the requirements of environmental protection and comprehensive utilization of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dry 55% red mud, 40% fly ash, 3% titanium slag, and 2% sodium carbonate, mechanically ball mill to 200 mesh, accounting for 80%, put it into a special crucible, place silicon molybdenum Melt in a rod resistance furnace, hold at 1450°C for 2 hours, rapidly cool the clarified glass liquid to obtain basic glass particles, press them into shape after ball milling, the forming pressure is 50Mpa, put the formed blank into the resistance furnace for nucleation Crystallization treatment, nucleation at 890°C for 2 hours, crystallization at 1185°C for 2 hours, cooling to room temperature with furnace, grinding and polishing to obtain glass ceramics. Product density is 2.68g / cm3, compressive strength is 86.63Mpa, flexural strength is 98.88Mpa, microhardness is 894Kgf / mm2, acid resistance is 0.053%, alkali resistance is 0.033%, water absorption is 0.021%, shrinkage The ratio is 5.8%, and the mass percentage of the chemical composition of the glass-ceramic is: Al 2 o 3 29.8%, SiO ...

Embodiment 2

[0022] Dry 45% red mud, 48% fly ash, 3% titanium slag, and 4% sodium carbonate, mechanically ball mill to 200 mesh, accounting for 80%, put it into a special crucible, place silicon molybdenum Melt in a rod resistance furnace, hold at 1450°C for 2 hours, rapidly cool the clarified glass liquid to obtain basic glass particles, press them into shape after ball milling, the forming pressure is 50Mpa, put the formed blank into the resistance furnace for nucleation Crystallization treatment, nucleation at 890°C for 2 hours, crystallization at 1185°C for 2 hours, cooling to room temperature with furnace, grinding and polishing to obtain glass ceramics. The product density is 2.73g / cm3, the compressive strength is 109.43Mpa, the flexural strength is 102.98Mpa, the microhardness is 1013Kgf / mm2, the acid resistance is 0.042%, the alkali resistance is 0.020%, the water absorption rate is 0.009%, and the shrinkage rate is 8.1%. The mass percentage of the chemical composition of the glass...

Embodiment 3

[0024] Dry 47% red mud, 47% fly ash, 6% titanium slag, and 0% sodium carbonate, mechanically ball mill to 200 mesh, accounting for 80%, put it into a special crucible, place silicon molybdenum Melt in a rod resistance furnace, hold at 1460°C for 2 hours, rapidly cool the clarified glass liquid to obtain basic glass particles, press them into shape after ball milling, the forming pressure is 50Mpa, put the formed blank into the resistance furnace for nucleation Crystallization treatment, nucleation at 900°C for 2 hours, crystallization at 1185°C for 2 hours, cooling to room temperature with furnace, grinding and polishing to obtain glass ceramics. The product density is 2.77g / cm3, the compressive strength is 92.43Mpa, the flexural strength is 89.22Mpa, the microhardness is 712Kgf / mm2, the acid resistance is 0.044%, the alkali resistance is 0.027%, the water absorption rate is 0.011%, and the shrinkage rate is 7.7%. The mass percentage of the chemical composition of the glass-ce...

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Abstract

The invention discloses a method for preparing microcrystalline glass by the utilization of red mud-fly ash-titanium slag, comprising the following steps: burdening 25-70 wt% of red mud, 23-70 wt% of fly ash, 1-10 wt% of titanium slag and 0-10 wt% of a cosolvent, mixing, melting, moulding, carrying out nucleation amd crystallization, and carrying out cold working. Main components of the product contain, by weight, 12-39.8% of Al2O3, 13.6-50% of SiO2, 0.8-5.2% of TiO2, 6.5-19% of CaO, 0.5-7.1% of Fe2O3, 0.64-2% of MgO and 1.5-8.2% of Na2O+K2O. the technology is simple; utilization rate of waste residues is high, and amount of admixture reaches more than 90%; costs of raw materials are effectively reduced; and performance of the product reaches the microcrystalline glass architectural decoration quality standard ''JCT872-2000'', and the product can be used in preparation of various tubes and sheet materials.

Description

technical field [0001] The invention belongs to the technical field of utilization of industrial solid waste resources, and relates to a method for preparing glass-ceramics, in particular to a method for preparing glass-ceramics from red mud-fly ash-titanium slag. Background technique [0002] In recent years, with the acceleration of urbanization and small town construction, a large amount of industrial waste red mud, fly ash and titanium slag have been produced, causing huge environmental pollution. According to statistics, the annual discharge of red mud in the world is about 50 million tons, and our country reaches 4 million tons every year. The storage and maintenance costs of red mud are very high. The accumulated fly ash in my country has reached 5.6 billion tons, occupying 900,000 tons of land. The annual maintenance cost exceeds 10 million yuan. Secondly, thousands of tons of titanium slag are produced every year, and the trend is increasing year by year. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C10/06
Inventor 陈朝轶李军旗茆志慧王家伟赵平源
Owner GUIZHOU UNIV
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