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Bayer process red mud porous glass ceramic and preparation method thereof

A technology of porous glass-ceramic and Bayer process red mud is applied in the field of industrial solid waste resource utilization, which can solve the problems of lack of light weight, and achieve the effects of solving difficult processing, reducing melting temperature and reducing self-weight.

Inactive Publication Date: 2013-10-30
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product is prepared by melting method and is mainly used in construction, chemical equipment anticorrosion and other fields, but it is not a porous building material product and does not have the advantage of light weight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of production method of red mud porous glass-ceramics of Bayer process, its raw material is according to weight percentage, and particle size is less than 200 order ammonium carbonate 2%, mass fraction 3% polyvinyl alcohol aqueous solution 15%, basic glass 83%, wherein said basic Glass, its raw materials are based on weight percentage, it includes 40% of Bayer process red mud with CaO content of 11-16%, 20% of quartz, 10% of borax, 15% of calcite, 5% of fluorite, 5% of sodium nitrate, lithium 5% mica, 4% coloring agent, and its steps include:

[0036]1) Mixing: According to the ratio of raw materials, weigh 80-120 mesh Bayer process red mud, quartz, borax, calcite, fluorite, sodium nitrate and lepidolite, and mix evenly for 3-5 minutes;

[0037] 2) Preparation of basic glass: compact the uniformly mixed raw materials, heat and melt them, the melting temperature is 1400°C, and the melting time is 2 hours. Pour the melted glass liquid into cold water quickly to obt...

Embodiment 2

[0044] A production method of Bayer process red mud porous glass-ceramics, its raw materials are according to weight percentage, ammonium bicarbonate 2% with particle size less than 200 meshes, ammonium carbonate 5%, mass fraction 3% polyvinyl alcohol aqueous solution 3%, basic glass 90% , wherein said basic glass, its raw material according to weight percentage, it includes CaO content is to 11-16% Bayer process red mud 60%, quartz 15%, borax 5%, calcite 8%, fluorite 2%, Sodium nitrate 3%, lepidolite 2%, coloring agent 2%, its steps include:

[0045] 1) Mixing: According to the ratio of raw materials, weigh 80-120 mesh Bayer process red mud, quartz, borax, calcite, fluorite, sodium nitrate and lepidolite, and mix evenly for 3-5 minutes;

[0046] 2) Preparation of basic glass: compact the uniformly mixed raw materials, heat and melt them, the melting time is 3 hours, and the melting temperature is 1350°C, quickly pour the melted glass liquid into cold water to obtain 0-6mm bas...

Embodiment 3

[0053] A kind of production method of red mud porous glass-ceramics of Bayer method, its raw material is according to weight percentage, and particle size is less than 5% of ammonium bicarbonate of 200 meshes, mass fraction 3% polyvinyl alcohol aqueous solution 10%, basic glass 85%, wherein said Basic glass, its raw materials are based on weight percentage, it includes 40% of Bayer process red mud with CaO content of 11-16%, 15% of quartz, 5% of borax, 15% of calcite, 5% of fluorite, 7% of sodium nitrate, Lepidolite 12%, coloring agent 1%, the steps include:

[0054] 1) Mixing: According to the ratio of raw materials, weigh 80-120 mesh Bayer process red mud, quartz, borax, calcite, fluorite, sodium nitrate and lepidolite, and mix evenly for 3-5 minutes;

[0055] 2) Preparation of basic glass: compact the uniformly mixed raw materials, heat and melt them, the melting time is 2 hours, and the melting temperature is 1450°C, quickly pour the melted glass liquid into cold water to ...

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Abstract

The invention relates to a Bayer process red mud porous glass ceramic and a preparation method thereof. The Bayer process red mud porous glass ceramic is processed and produced by taking Bayer process red mud as a main raw material, wherein the raw material comprises the following components in percentage by weight: 2-7% of a pore-forming agent, 3-15% of a polyvinyl alcohol aqueous solution of which the mass fraction is 3%, and the balance of basic glass which is processed and produced by taking the Bayer process red mud as the main raw material; and the basic glass comprises the following chemical components in percentage by mass: 40-55% of SiO2, 5-13% of Al2O3, 20-33% of CaO, 5-10% of Fe2O3, 3-12% of Na2O, 3-8% of B2O3, 2-6% of MgO and 1-4% of F<->. Compared with the conventional brick, the Bayer process red mud porous glass ceramic material prepared by the method has the characteristics of light weight, high strength, heat insulation, heat preservation, sound absorption, noise prevention and the like, so that the Bayer process red mud porous glass ceramic material is an ideal building material.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial solid waste, and in particular relates to a Bayer process red mud porous glass-ceramic and a preparation method thereof. Background technique [0002] Red mud is an unavoidable industrial by-product in the production process of the aluminum industry. Due to the difference in production methods and bauxite grades, about 0.6-2.0t of red mud is produced for every ton of alumina produced. Bayer process red mud is the waste residue produced after the extraction of alumina from bauxite using the Bayer process production method. As far as my country's current alumina production capacity is concerned, the annual output of red mud in China has exceeded 40 million tons in 2010. Because red mud contains alkali and other substances, it is very polluting to the environment: some countries discharge red mud into the sea, polluting the ocean due to harmful substances such as alkal...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03C6/10
Inventor 李小雷王红亮曹新鑫胡美华胡强李尚升宿太超谢国涛何小芳
Owner HENAN POLYTECHNIC UNIV
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