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Glass ceramic and preparation method thereof

A glass-ceramic and crystallization technology, which is applied in the field of glass-ceramics and its preparation, can solve the problems of reagents and materials that are not easily obtained, the strength of glass-ceramics is not high, and the utilization rate of solid waste is not high, so as to achieve high strength and few defects , low cost effect

Inactive Publication Date: 2019-02-19
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing method for preparing glass-ceramics from solid waste resources is relatively complicated, and the amount of other materials mixed in is large and varied, and the utilization rate of solid waste is not high; in addition, some reagents and materials are not easy to obtain; and, the preparation The resulting glass-ceramic strength is not high

Method used

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Examples

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preparation example Construction

[0032] The invention provides a method for preparing glass ceramics, comprising the following steps:

[0033] a) Oxidizing and roasting the mixed rare earth concentrate to obtain rare calcined sand;

[0034] b) Grinding the high-temperature smelting solid waste, the rare calcined sand obtained in step a), and a sintering agent, and then adding a binder for mixing to obtain a mixture; the sintering agent is feldspar;

[0035] c) performing compression molding and heat treatment on the mixture obtained in step b) in sequence to obtain glass ceramics.

[0036] In the invention, firstly, the mixed rare earth concentrate is oxidized and roasted to obtain the rare calcined sand. In the present invention, the mixed rare earth concentrate preferably includes bastnaesite with a content greater than 40 wt%, monazite with a content greater than 15 wt%, fluorspar with a content greater than 1 wt%, and barite with a content greater than 0.1 wt%, more preferably It includes bastnaesite wi...

Embodiment 1

[0072] The high-temperature smelting solid waste used in Example 1 is the blast furnace slag of an iron and steel enterprise in Inner Mongolia; after analysis, the slag composition after homogenization is: SiO 2 36.9wt%, CaO 37.7wt%, MgO 8.6wt%, Al 2 o 3 8.9wt%, Fe 2 o 3 0.9wt%, TiO 2 0.8wt%; the feldspar used is a feldspar produced in a certain place in Hunan, and its chemical composition is: SiO 2 63.5wt%, Al 2 o 3 15.2wt%, K 2 O+Na 2 O 13.2 wt%.

[0073] (1) Oxidize and roast the mixed rare earth concentrate at 500±50° C. for 3 hours to obtain rare calcined sand.

[0074] (2) Solid waste from high-temperature smelting on a dry basis: dilute calcined sand: feldspar = 90:5:5 to prepare batching materials; then add the above batching materials to a ball mill for grinding with corundum ceramic balls, and pass through a 200-mesh sieve to obtain powder material; the particle size of the powder is -0.074mm, 100%; then add sodium bentonite with 5% of the mass of the po...

Embodiment 2

[0079] The high-temperature smelting solid waste used in Example 2 is the nickel-iron submerged arc slag of a ferroalloy company in Inner Mongolia; its main component content is: SiO 2 41.8wt%, Al 2 o 3 6.6wt%, CaO 29.0wt%, Fe 2 o 3 3.4wt%, MgO 16.8wt%; the feldspar used is a feldspar produced in a certain place in Inner Mongolia, and its chemical composition is: SiO 2 64.6wt%, Al 2 o 3 19.3wt%, Fe 2 o 3 0.3wt%, CaO 0.01wt%, MgO 0.01wt%, K 2 O 13.3wt%, Na 2 O 2.1wt%, TiO 2 0.01 wt%.

[0080] (1) Oxidize and roast the mixed rare earth concentrate at 500±50° C. for 3 hours to obtain rare calcined sand.

[0081] (2) Solid waste from high-temperature smelting on a dry basis: dilute calcined sand: feldspar = 100:6:6 to prepare batching materials; then add the above batching materials to a ball mill for grinding with corundum ceramic balls, and obtain powder after passing through a 200-mesh sieve material; the particle size of the powder is -0.074mm, 100%; then add...

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Abstract

The invention provides a preparation method of glass ceramic. The preparation method comprises the following steps that (a) oxidizing roasting is conducted on mixed rare earth ore concentrate to obtain sparse calcine; (b) high-temperature smelting solid waste, the sparse calcine obtained in the step (a) and an agglutinant are prepared and ground, then an adhesive is added, and mixing is performedto obtain a mixture, wherein the agglutinant is feldspars; (c) the mixture obtained in the step (b) is sequentially subjected to compression molding and heat treatment, and glass ceramic is obtained.Compared with the prior art, the preparation method uses the high-temperature smelting solid waste as the main raw material, the waste amount is large, and the solid waste utilization rate is high; specific components are adopted to prepare the high-quality glass ceramic under the joint effect of a specific process; the glass ceramic has few defects and higher strength. An experimental result shows that the glass ceramic prepared by the preparation method has the density of 2.8 g / cm<3> or above, the compressive strength is 460 MPa or above, and the bending strength is 136 MPa or above.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a glass-ceramic and a preparation method thereof. Background technique [0002] Glass-ceramic refers to the addition of some nucleating substances to the glass, and through heat treatment, light irradiation, or chemical treatment, a large number of tiny crystals are uniformly precipitated in the glass to form a multi-phase dense microcrystalline phase and glass phase. Complex. Microcrystalline glass, also known as microcrystalline jade or ceramic glass, is an inorganic non-metallic material and comprehensive glass. Its scientific name is glass crystal. It has the dual characteristics of glass and ceramics, and has higher brightness than ceramics and stronger toughness than glass. [0003] Most of the components used to make glass-ceramics are contained in the general waste residue. The chemical composition of the existing raw materials can be determined through computer testing, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03B19/06C03C6/10
CPCC03B19/06C03C1/002C03C10/0063
Inventor 蒋复量吴浩楠罗明亮李向阳洪昌寿王者
Owner NANHUA UNIV
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