Method for preparing colored foam glass ceramic material from lithium tailings

A foam glass and ceramic material technology, applied in the field of ceramic material preparation, can solve the problems of lack of decorative effect, single color of foam glass ceramics, limited use range, etc., achieves high artistic value and practical value, saves natural ceramic raw materials, and achieves effective The effect of using

Inactive Publication Date: 2018-06-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many thermal insulation materials, ordinary foam glass ceramics have a single color and lack of decorative effects, so their application range is limited to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 70% of the lithium tailings, 15% of the glass powder, 5% of the flux, and 10% of the pore-forming agent, and dry mix them by ball milling for 20 minutes. After mixing evenly, spread the batch materials into the silicon carbide mold;

[0029] Put it into a high-temperature furnace, control the heating rate to 6°C / min, raise it from room temperature to 800°C, keep it for 30 minutes, and then burn it to 1050°C at a heating rate of 5°C / min and keep it for 15 minutes. Cool the furnace to 600°C and anneal for 30 minutes to obtain white foam glass ceramics;

[0030] In this embodiment, the flux is borax, and the pore forming agent is calcium carbonate.

[0031] The pores of the white foam glass ceramic material obtained in this example are evenly distributed, the pore diameter is between 500 μm and 800 μm, and the bulk density is 0.61 g / cm 3 , thermal conductivity 0.20W / (m·K), compressive strength up to 5.4MPa.

Embodiment 2

[0033] Weigh 70% of the dried lithium tailings, 20% of glass powder, 8% of flux, 2% of pore-forming agent, and dry-mix by ball milling for 20 minutes. After mixing evenly, spread the batching materials into the mullite mold;

[0034] Put it into a high-temperature furnace, control the heating rate to 6°C / min, raise it from room temperature to 800°C, keep it for 30 minutes, and then burn it to 900°C at a heating rate of 3°C / min and keep it for 15 minutes. Cool the furnace to 500°C and anneal for 30 minutes to obtain taupe foam glass ceramics;

[0035] In this embodiment, the flux is potassium carbonate and Glauber's salt (mass ratio 1:1), and black silicon carbide is the pore-forming agent.

[0036] The taupe foam glass ceramic material obtained in this example has uniform distribution of pores, a pore diameter between 500 μm and 800 μm, and a bulk density of 0.7 g / cm 3 , thermal conductivity 0.22W / (m·K), compressive strength up to 8MPa.

Embodiment 3

[0038] Weigh 70% of the dried lithium tailings, 13% of glass powder, 7% of flux, 10% of pore-forming agent, and 3% of coloring agent, and dry-mix by ball milling for 20 minutes. After mixing evenly, spread the batch into mullite mold;

[0039] Put it into a high-temperature furnace, control the heating rate to 6°C / min, raise it from room temperature to 800°C, keep it for 30 minutes, and then burn it to 950°C at a heating rate of 3°C / min and keep it for 15 minutes. Cool the furnace to 600°C and anneal for 30 minutes to obtain green foam glass ceramics;

[0040] In this embodiment, the flux is potassium carbonate, Glauber's salt and borax (mass ratio 1:2:3), light green silicon carbide and calcium carbonate (mass ratio 1:1) are pore-forming agents, and chromium oxide is the coloring raw material;

[0041] The pores of the foamed glass ceramic material obtained in this example are evenly distributed, the pore diameter is between 500 μm and 800 μm, and the bulk density is between...

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Abstract

The invention provides a method for preparing a colored foam glass ceramic material from lithium tailings. According to the method, the material is prepared from a main material, an auxiliary material, fluxing agents, pore forming agents and colorants by blending and one-time high-temperature sintering, wherein the lithium tailings serve as the main material; cullet serves as the auxiliary material; the fluxing agents comprise sodium fluoride, potassium carbonate, sodium silicate, mirabilite and borax; the pore forming agents comprise calcium carbonate and silicon carbide; the colorants comprise copper oxide, iron oxide, cobalt oxide, chromium oxide, manganese oxide and zinc oxide. The problems of industrial slag accumulation and secondary pollution can be solved effectively with the method, and recycling of resources is realized; the preparation process is simple, the cost is low, and prepared foam glass ceramic is small in bulk density, uniform in pore distribution, adjustable in color, high in compressive strength and high in added value and has good industrial prospect.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, and in particular relates to a method for preparing colored foam glass ceramic materials by utilizing lithium tailings. Background technique [0002] my country is rich in lithium resources, and the proven reserves of lithium resources rank among the top in the world. However, the amount of lithium tailings produced by spodumene concentrate and lithium salt production is huge every year, and the lithium tailings produced by lithium salt production alone reach millions of tons. While the production of lithium salt promotes the development of my country's lithium industry, the relatively backward mining technology and extensive mining mode not only cause a great waste of resources, but also bring a huge amount of industrial waste residue, causing great pollution to the environment. negative impact on social and economic development. Therefore, it is of great practical signific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C6/02C03C11/00C03C4/02C03B19/08C03B19/06
CPCC03C1/002C03B19/06C03B19/08C03C4/02C03C11/007
Inventor 张宏泉文进王亚名
Owner WUHAN UNIV OF TECH
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