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Method for preparing mineral wool by using high-calcium coal ash

A high-calcium fly ash, mineral wool technology, applied in glass manufacturing equipment, manufacturing tools, glass production and other directions, can solve the problems of increasing the production cost of mineral wool, consuming large coke, harming the ecology, etc., and achieving high added value utilization. , protect the environment, and promote the effect of the economy

Inactive Publication Date: 2014-08-13
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] CN103159416A discloses a concrete cementitious material for construction. The material includes 1000-4000 parts of high-calcium fly ash, 100-1600 parts of mixing water, 10-30 parts of nanoclay, 5-80 parts of borax, and a water reducer 10-80 copies, thus effectively solving the problems of high-calcium fly ash polluting the environment, endangering ecology, and wasting resources
[0017] Mineral wool is an energy-saving and thermal insulation material with excellent performance. It is widely used in the fields of building energy conservation and pipeline insulation. It has always used massive blast furnace slag as the main raw material for production. The massive blast furnace slag will consume a large amount of coke, waste energy and pollute the environment, but also increase the production cost of mineral wool

Method used

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  • Method for preparing mineral wool by using high-calcium coal ash
  • Method for preparing mineral wool by using high-calcium coal ash
  • Method for preparing mineral wool by using high-calcium coal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] A. Ingredients

[0090] Weigh the following components (1)-(5) respectively:

[0091] (1) high calcium fly ash with CaO mass content of 10%;

[0092] (2) SiO 2 ;

[0093] (3)Al 2 o 3 ;

[0094] (4) MgO;

[0095] (5) CaO;

[0096] Proportion the above components, then mix them evenly and pulverize to obtain the ingredients, wherein the ratio of each component in the proportion should make the SiO in the final obtained mineral wool 2 The mass percentage is 38%, Al 2 o 3 The mass percentage content is 18%, the CaO mass percentage content is 26% and the MgO mass percentage content is 6%, and the others are impurity components.

[0097] B. Ball making

[0098] Add polyvinyl alcohol to the batching obtained in step A, wherein the quality of polyvinyl alcohol is 1% of the batching mass, and obtain pellets with a diameter of 3 cm after pelletizing.

[0099] C. Melting, removing iron and carbon

[0100] Put the pellets into the above-mentioned iron and carbon removal ...

Embodiment 2

[0104] A. Ingredients

[0105] Weigh the following components (1)-(5) respectively:

[0106] (1) CaO mass content is 20% high calcium fly ash;

[0107] (2) SiO 2 ;

[0108] (3)Al 2 o 3 ;

[0109] (4) MgO;

[0110] (5) CaO;

[0111] Proportion the above components, then mix them evenly and pulverize to obtain the ingredients, wherein the ratio of each component in the proportion should make the SiO in the final obtained mineral wool 2 The mass percentage is 36%, Al 2 o 3 The mass percentage content is 26%, the CaO mass percentage content is 28% and the MgO mass percentage content is 4%, and the others are impurity components.

[0112] B. Ball making

[0113] Add polyvinyl alcohol to the batching obtained in step A, wherein the quality of polyvinyl alcohol is 3% of the batching mass, and obtain pellets with a diameter of 5 cm after pelletizing.

[0114] C. Melting, removing iron and carbon

[0115] Put the pellets into the above-mentioned iron and carbon removal dev...

Embodiment 3

[0119] A. Ingredients

[0120] Weigh the following components (1)-(5) respectively:

[0121] (1) high calcium fly ash with CaO mass content of 30%;

[0122] (2) SiO 2 ;

[0123] (3)Al 2 o 3 ;

[0124] (4) MgO;

[0125] (5) CaO;

[0126] Proportion the above components, then mix them evenly and pulverize to obtain the ingredients, wherein the ratio of each component in the proportion should make the SiO in the final obtained mineral wool 2 The mass percentage is 42%, Al 2 o 3 The mass percentage content is 18%, the CaO mass percentage content is 30% and the MgO mass percentage content is 3%, and the others are impurity components.

[0127] B. Ball making

[0128] Add polyvinyl alcohol to the batching obtained in step A, wherein the quality of polyvinyl alcohol is 5% of the batching mass, and obtain pellets with a diameter of 6 cm after pelletizing.

[0129] C. Melting, removing iron and carbon

[0130] Put the pellets into the above-mentioned iron and carbon remova...

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Abstract

The invention relates to a method for preparing mineral wool by using high-calcium coal ash. The method comprises the following steps: A, preparing materials; B, pelletizing; C, melting, and removing iron and carbon; D, forming fiber. By selecting appropriate mixed raw materials and amount ratio and controlling the process parameters of different process steps, the mineral wool which is good in property and uniform in diameter distribution is obtained; inspection shows that various fiber products prepared from the mineral wool prepared by using the method are excellent in property, completely meet multiple application indexes, and have wide application prospect and industrial potential in fields of energy preservation, emission reduction and waste recycling.

Description

technical field [0001] The invention relates to a waste utilization method of coal combustion residues, more specifically, the invention relates to a method for preparing mineral wool by utilizing high-calcium fly ash, which belongs to the fields of reprocessing and utilization of solid waste and mineral wool production. Background technique [0002] Fly ash is a kind of solid waste produced in the production process of coal-fired power plants, and its output accounts for about 5-20% of the total coal combustion, so its output is huge. [0003] Fly ash can be divided into low-calcium fly ash and high-calcium fly ash. Low-calcium fly ash is a fly ash with very low calcium oxide content emitted from bituminous coal as fuel, while high-calcium fly ash is Refers to a kind of fly ash obtained by burning lignite and sub-bituminous coal as fuel in thermal power plants and blast furnace gas plants, of which (SiO 2 +Al 2 o 3 +Fe 2 o 3 ) mass percentage content ≥ 50%, CaO mass pe...

Claims

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Application Information

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IPC IPC(8): C03B37/005C03B1/02
CPCY02P40/50
Inventor 张作泰王习东刘丽丽郑凯
Owner PEKING UNIV
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