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Method for making heat insulation plates through utilizing industrial solid wastes

A technology for thermal insulation board and solid waste, which is applied in the field of comprehensive utilization of industrial solid waste resources, can solve the problems of high raw material prices, compressed corporate profits, and low product sales prices, and achieves lower production costs, stable processes, and reduced environment. effect of influence

Active Publication Date: 2014-11-12
DATANG INT HIGH ALUMINA COAL R & D CENT +1
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Problems solved by technology

[0003] At present, the raw materials used in the production of thermal insulation boards are mainly quartz powder, lime, cement, reinforcing fibers and additives, etc. Nowadays, the production enterprises of thermal insulation boards are facing problems: high prices of quartz powder, lime and cement raw materials, and low product sales prices , leading to the compression of corporate profits, finding low-priced raw materials is an effective solution to this problem

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  • Method for making heat insulation plates through utilizing industrial solid wastes
  • Method for making heat insulation plates through utilizing industrial solid wastes

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Embodiment

[0016] Calcium silicate slag, fly ash and desulfurized gypsum were all taken from a coal-fired power plant in Hohhot, Inner Mongolia, and their chemical compositions are shown in Table 1, Table 2 and Table 3, respectively.

[0017] Table 1 Chemical composition of calcium silicate

[0018] Calcium silicon slag

FeO

SiO 2

CaO

MgO

Al 2 o 3

alkali

Burn down

Fe 2 o 3

total

Content (%)

＜0.1

22.35

55.76

1.73

3.04

4.0

9.01

1.87

97.76

[0019] Table 2 Chemical composition of desulfurized gypsum

[0020] Desulfurization gypsum

TF

SiO 2

CaO

MgO

Al 2 o 3

SO 3

h 2 o

Fe 2 o 3

total

Content (%)

0.40

2.59

34.30

1.55

0.88

42.31

8.7

0.48

91.21

[0021] Table 3 Chemical composition of fly ash

[0022] fly ash

SiO 2

A1 2 o 3

T FeO

MgO

CaO

Na 2 o...

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Abstract

The invention aims to provide a method for making heat insulation plates through utilizing industrial solid wastes. The method is characterized in that raw materials comprising calcium silicate slag, fly ash, desulfurized gypsum and the like undergo weighing metering, water addition stirring, secondary countercurrent stirring, plate molding, pre-maintenance and drying to obtain heat insulation plates satisfying all index requirements of the Chinese standards. The method has the characteristics of simple making technology, stable flow, low costs of the raw materials, and reduction of the influences of the industrial solid wastes to the environment because of the changing of wastes into valuables.

Description

technical field [0001] The invention relates to a method for making thermal insulation boards by using industrial solid waste, especially a method for making thermal insulation boards by using industrial solid wastes such as calcium silicate slag, fly ash and desulfurized gypsum, which belongs to the field of comprehensive utilization of industrial solid waste resources. Especially the collaborative utilization of industrial solid waste in the power, coal and steel industries. Background technique [0002] Since my country uses coal as the main energy source, the annual coal consumption for electricity is as high as 400 million tons, so the solid waste discharge of coal-fired industries such as fly ash, silicon calcium slag and desulfurized gypsum is huge, and solid waste accumulates all year round, occupying a large amount of land and causing serious pollution Regional Environment. At present, there is no good comprehensive utilization method for these industrial solid wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 孙俊民曹钊杨志杰张金山苗瑞平曹永丹
Owner DATANG INT HIGH ALUMINA COAL R & D CENT