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A kind of glass batch material and its preparation method and a kind of glass and its preparation method

A batch, ultra-white glass technology, applied in the field of glass

Active Publication Date: 2017-08-04
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although some research has been done on the extraction of aluminum by the acid method of fly ash, there are only by-products such as white carbon black, silica powder, silica gel, cement and flocculant, and the development of by-products needs to be strengthened to further improve the extraction of aluminum by the acid method of fly ash. The added value of aluminum

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  • A kind of glass batch material and its preparation method and a kind of glass and its preparation method

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preparation example Construction

[0027] On the one hand, the present invention provides a kind of preparation method of glass batch material, and this method comprises:

[0028] (1) Remove the residual acid from the acid residue obtained after the fly ash is subjected to acid extraction of aluminum;

[0029] (2) Leaching with alkaline solution, solid-liquid separation to obtain leaching solution and leaching residue;

[0030] (3) Introduce carbon dioxide into the leaching solution for carbonation and decomposition, and then separate solid-liquid to obtain silicic acid precipitate and carbonate solution;

[0031] (4) Mix the silicic acid precipitate obtained in step (3) with calcium oxide and / or calcium oxide precursor, and optionally with sodium oxide and / or sodium oxide precursor to obtain a glass batch.

[0032] In the present invention, the glass batch refers to a glass batch whose ratio of soda-lime-silicon satisfies the glass composition.

[0033] In the present invention, the alkali solution is prefer...

Embodiment 1

[0077] This example is used to illustrate the preparation method of the glass batch material and the preparation method of glass of the present invention.

[0078] (1) Take the fly ash of the above composition and react under the conditions of sulfuric acid concentration of 98%, temperature of 260°C, time of 100min, and liquid-solid ratio of 4:1. Afterwards, unreacted sulfuric acid is filtered out, and the generated aluminum sulfate is in the filter residue, and part of the sulfuric acid is adsorbed. After roasting at 300°C to remove acid, add water to dissolve the dry residue for 30 minutes at a liquid-solid ratio of 6:1 to obtain aluminum sulfate solution and acid residue. The silicon dioxide content in the acid method residue was measured to be 72.8% by weight, the alumina content to be 13% by weight, and the iron oxide content to be 0.4% by weight.

[0079] (2) Roast the residue from the acid process at 800°C for 60 minutes, and wash it with water until neutral after cool...

Embodiment 2

[0086] This example is used to illustrate the preparation method of the glass batch material and the preparation method of glass of the present invention.

[0087] (1) The fly ash with the above composition is taken, and the iron oxide content is reduced to 0.7% by weight after iron removal by magnetic separation. Add 37% by weight hydrochloric acid for acid dissolution reaction, the ratio of hydrochloric acid to alumina in fly ash is 4.5:1, the reaction temperature is 200°C, and the reaction time is 2 hours. Solid-liquid separation to obtain aluminum chloride solution and acid residue. The silicon dioxide content in the acid method residue was measured to be 91.2% by weight, the alumina content to be 2.1% by weight, and the iron oxide content to be 0.2% by weight.

[0088] (2) Roast the residue from the acid process at 500°C for 120 minutes, and wash it with water until neutral after cooling. Then, the acid process residue was stirred and leached in 15% by weight sodium hyd...

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Abstract

The invention discloses a preparation method of a glass batch. The method includes the following steps: 1, removing residual acid from residues obtained after acid process aluminum extraction of fly ash; 2, leaching by using an alkali solution, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues; 3, introducing carbon dioxide to the leaching solution in order to carry out carbonation decomposition, and carrying out solid-liquid separation to obtain a silicic acid precipitate and a carbonate solution; and 4, mixing the silicic acid precipitate obtained in step 3 with calcium oxide and / or a calcium oxide precursor, and optionally mixing with sodium oxide and / or a sodium oxide precursor to obtain the glass batch. The invention also discloses the glass batch prepared through the preparation method, a preparation method of glass, and the glass prepared through the glass preparation method. The glass contains an extremely low quantity of iron oxide, has high visible light transmittance, can achieve ultra clear glass standards, can greatly improve the overall economy of the acid process aluminum extraction of the fly ash, reduces industrial solid wastes generated in the acid process aluminum extraction, and realizes recycling and environmentally friendly application of the fly ash.

Description

technical field [0001] The invention relates to a method for preparing glass batch material and the glass batch material prepared by the method. The invention also relates to a method for preparing glass from the glass batch material and the glass prepared by the method. Background technique [0002] As an inevitable product of coal combustion in thermal power plants, fly ash is the largest single industrial solid waste in China. The resource utilization of fly ash to extract aluminum is not only a great contribution to environmental protection, but also has important strategic significance when China's bauxite resources are about to be exhausted. [0003] The process of extracting aluminum from fly ash is mainly divided into acid method, alkali method, acid-base combined method, and ammonium sulfate method. Generally speaking, the discharge of industrial solid waste from acid extraction of aluminum is less, while the discharge of industrial solid waste from alkaline extrac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C6/00C03B1/00
CPCC03B1/00C03C1/002
Inventor 孙琦赵利军王宝冬郭昭华禹耕之王晓欢刘晓婷肖永丰
Owner CHNA ENERGY INVESTMENT CORP LTD
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