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Lightweight, heat-insulation and fire-proof castable composition, and application and preparation method thereof

A technology for refractory castables and compositions, which is applied in the field of refractory materials, can solve the problems of large environmental hazards, impact on the health of construction workers, and short lifespan, and achieve the effect of reducing production costs.

Inactive Publication Date: 2016-11-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, such nitrogen purification devices generally use ceramic fibers as insulation materials, and ceramic fibers have the following disadvantages: (1) short life, need to be replaced every 2 years; (2) difficult to install according to requirements, unable to achieve 1 / 2 ratio compression ; (3) Great environmental hazards
The International Cancer Society listed this type of fiber as a possible carcinogen in 2002. This type of fiber cannot be degraded after being inhaled by the human body, which will affect the health of construction workers.

Method used

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  • Lightweight, heat-insulation and fire-proof castable composition, and application and preparation method thereof
  • Lightweight, heat-insulation and fire-proof castable composition, and application and preparation method thereof
  • Lightweight, heat-insulation and fire-proof castable composition, and application and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Take by weight the vermiculite with a particle size of 4-10 mesh, 12 parts; the vermiculite with a particle size of 10-28 mesh, 13 parts; the perlite powder with a particle size of 0.425-3mm, 5 parts; the silicon micropowder, 3 parts ; High-alumina cement, 67 parts; a total of 100 parts of solid, plus water, 95 parts.

[0026] The production method is: weigh various raw materials according to the above weight ratio, first add 4-10 mesh and 10-28 mesh vermiculite particles and perlite powder particles and mix evenly, stir in a mixer for 2 to 3 minutes, and then add other Stir the powder for 6-8 minutes. After mixing evenly, add 95 parts of water gradually, and stir while adding water, so that the solid and liquid are fully mixed. Stir for 3-5 minutes to form a castable with good fluidity.

Embodiment 2

[0027] Example 2 Weigh 13 parts of vermiculite with a particle size of 4-10 mesh according to the weight ratio; 16 parts of vermiculite with a particle size of 10-28 mesh; 3 parts of perlite powder with a particle size of 0.425-3mm; silicon micropowder, 4 parts ; High-alumina cement, 64 parts; Additional water, 95 parts, the preparation method is the same as in Example 1.

Embodiment 3

[0028] Example 3 Weigh 11 parts of vermiculite with a particle size of 4-10 mesh according to the weight ratio; 17 parts of vermiculite with a particle size of 10-28 mesh; 7 parts of perlite powder with a particle size of 0.425-3mm; microsilica powder, 5 parts ; A high alumina cement, 60 parts; add water, 95 parts, the preparation method is the same as in Example 1.

[0029] Table 1 shows the physical properties of the lightweight, heat-insulating and refractory castable compositions prepared in the above examples.

[0030] Table 1

[0031]

[0032]

[0033] The physical and chemical performance parameters in the table were measured according to the following standards:

[0034] The heating permanent line change is determined according to GB / T5988-2007 test method for heating permanent line change of refractory materials;

[0035] Bulk density is measured according to YB / T5200-1993 dense refractory castable apparent porosity and bulk density test method;

[0036] The ...

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Abstract

The invention discloses a lightweight, heat-insulation and fire-proof castable composition, and an application thereof in a nitrogen purification device and a preparation method thereof; the castable composition includes vermiculite, a perlite powder, a silica micro-powder and high-alumina cement. The castable composition has the characteristics of low thermal conductivity, low volume density, good thermal shock resistance, high use temperature and the like; at the same time, the castable composition also has good fluidity and easy and convenient construction; after being applied to the nitrogen purification device, the castable composition can effectively reduce heat loss of the nitrogen purification device, improves the thermal efficiency, reduces energy consumption, saves energy and reduces emissions. In addition, raw materials adopted by a lightweight, heat-insulation and fire-proof castable are non-toxic and non-corrosive, so the lightweight, heat-insulation and fire-proof castable has the characteristics of energy saving and environmental protection, and plays an important role in improving and protecting the environment. At the same time, all kinds of used raw materials can be purchased from markets, and the production costs of the lightweight heat-insulation and fire-proof castable are reduced.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a lightweight, heat-insulating, refractory castable composition and its application and preparation method in a nitrogen purification device. Background technique [0002] High-purity nitrogen is an important protective gas required for cold-rolled sheet, hot-dip galvanizing, and silicon steel production lines. The purity of nitrogen has a great impact on product quality. Oxygen content exceeding the standard may lead to surface oxidation of the steel plate, surface elements react with oxygen to affect the quality of the steel plate, and galvanized galvanized bare spots and other problems. Nitrogen is a by-product of the cryogenic air separation oxygen plant. Due to its relatively low purity and unstable oxygen content, the nitrogen produced is often called "contaminated nitrogen". my country's steel mills have abundant "contaminated nitrogen" resources, but due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张巍马磊王晓东张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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