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Method for preparing thermal insulation material with low heat conductivity coefficient

A technology of thermal conductivity and thermal insulation material, which is applied in the field of thermal insulation material manufacturing to achieve the effects of improving compressive strength, low thermal conductivity and thermal insulation coefficient, and improving hydrophobicity.

Active Publication Date: 2014-11-12
MAANSHAN HONGDA INSULATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the thermal insulation thermal conductivity of existing thermal insulation materials is also maintained at about 0.004W / (m·k) (average temperature 25°C), and cannot be further reduced, the present invention provides a method for preparing thermal insulation materials with low thermal conductivity. Not only the heat preservation thermal conductivity is low, which can be maintained at about 0.0034W / (m·k) (average temperature 25°C), but also the heat preservation effect is good, and various performances are excellent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing an insulating material with low thermal conductivity, the steps of which are:

[0032] (1) Raw material processing, raw materials are mixed according to 650kg / batch of basalt, 99kg / batch of granite, 49kg / batch of white rock, 146kg / batch of coal gangue, 165kg / batch of slag, 265kg / batch of coke, pulverized after mixing, and preheated to 490°C, after preheating, add the raw materials into the cupola to melt and burn the raw materials, add liquid oxygen when the raw materials are melted and burned, and the amount of liquid oxygen is 31m 3 / batch, keeping the temperature in the cupola at 930°C;

[0033] (2) material fibrosis, the solution that melts in the step (1) is through centrifugation into fiber, becomes fibrous, sprays phenolic resin in the centrifugal process, and phenolic resin is 2402 type phenolic resins, and the amount of spraying of resin is 63kg / tons of fiber; the speed of centrifugation is 7500 rpm;

[0034] (3) collecting cotton, col...

Embodiment 2

[0040] With embodiment 1, difference is that in step (1) raw material is mixed according to 600kg / batch of basalt, 110kg / batch of granite, 45kg / batch of white rock, 150kg / batch of coal gangue, 150kg / batch of slag, 275kg / batch of coke , mixed and pulverized, preheated to 450°C, and after preheating, put the raw materials into the cupola, the temperature in the cupola is 970°C, so that the raw materials are melted and burned, and the amount of liquid oxygen used is 28m 3 / batch; the amount of resin sprayed in step (2) is 49kg / ton of fiber; the speed of centrifugation is 7100 rpm; the temperature of solidification in step (5) is 260°C.

[0041] The size of the cut thermal insulation rock wool board is 1000mm in length, 600mm in width, 50mm in thickness and 77kg / m in density 3 . The performance of the thermal insulation rock wool board was tested. The average fiber diameter is 3.5μm, the maximum service temperature is 650°C, the content of slag balls (particle size greater than 0...

Embodiment 3

[0043] With embodiment 1, difference is that in step (1) raw material is mixed according to 680kg / batch of basalt, 90kg / batch of granite, 55kg / batch of white rock, 140kg / batch of coal gangue, 180kg / batch of slag, 250kg / batch of coke , mixed and pulverized, preheated to 550°C, after preheating, put the raw materials into the cupola, the temperature in the cupola is 890°C, so that the raw materials are melted and burned, and the amount of liquid oxygen used is 34m 3 / batch; the amount of resin sprayed in step (2) is 57kg / ton of fiber; the speed of centrifugation is 6000 rpm; the temperature of curing in step (5) is 300°C.

[0044] The size of the cut thermal insulation rock wool board is 1000mm in length, 600mm in width, 50mm in thickness and 75kg / m in density 3 . The performance of the thermal insulation rock wool board was tested. The average fiber diameter is 3.1 μm, the maximum service temperature is 660 ° C, the content of slag balls (particle size greater than 0.25 mm) is...

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Abstract

The invention discloses a method for preparing a thermal insulation material with a low heat conductivity coefficient, and belongs to the field of thermal insulation material manufacturing. The method comprises the steps that firstly, raw materials are processed, 600-680 kg per batch of basalt, 90-110 kg per batch of granite, 45-55 kg per batch of white rock, 140-150 kg per batch of coal gangue, 150-180 kg per batch of slag and 250-275 kg per batch of coke are mixed, crushed and preheated to the temperature ranging from 450 DEG C to 550 DEG C, the 28-34 m<3> per batch of liquid oxygen is added when the raw materials are fused and burned, and the temperature of a cupola furnace is kept at the temperature ranging from 890 DEG C to 970 DEG C; secondly, fibration is carried out on the materials; thirdly, rock wool is collected; fourthly, overlapping is carried out; fifthly, solidifying is carried out; sixthly, cutting and packaging are carried out. The the rock wool machined through the method is low in heat preservation heat conductivity coefficient, good in heat preservation effect, low in manufacturing cost and excellent in various properties.

Description

technical field [0001] The invention belongs to the field of thermal insulation material manufacturing, and more specifically relates to a preparation method of a thermal insulation material with low thermal conductivity. Background technique [0002] The development of thermal insulation materials is rapid, and the use of good thermal insulation technology and materials in industry and construction can often achieve twice the result with half the effort. Generally, thermal insulation materials require that the thermal conductivity is less than or equal to 0.2. For the insulation of industrial equipment and pipelines, the thermal insulation lining used is required to have the characteristics of low thermal conductivity, low density, high flexibility, fireproof and waterproof. Its thermal conductivity at room temperature is 0.018W / (K m) and it is absolutely waterproof, and its thermal insulation performance is 3 to 8 times that of traditional materials. With the development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02C03B37/005
Inventor 束青华何海兵杨勇
Owner MAANSHAN HONGDA INSULATION MATERIAL
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