JPS5948779B2 - Composite fireproof insulation materials and fireproof structures using them - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire-resistant insulation material used for the purpose of insulating various furnaces and containers, and relates to a durable composite fire-resistant insulation material with excellent insulation properties, and a fire-resistant insulation material using the composite fire-resistant insulation material. The purpose of the present invention is to provide a fireproof structure constructed on the inner and outer surfaces of various high-temperature furnaces and containers.

Recently, attempts have been made to insulate various furnaces and containers from the viewpoint of resource and energy conservation.

Traditionally, insulation bricks or inorganic fiber insulation materials have been used as insulation materials for this type of purpose, but the former has the disadvantages of insufficient insulation at high temperatures, its small shape, and the need for a long construction period. The latter has excellent insulation properties at high temperatures, but when used for a long time, the fibers crystallize and turn into powder, so if it is applied to the inner surface of the heating furnace, the pulverized fiber powder will be inside the furnace. There were problems such as contamination of other products.

Further, when applied to the inner surface of a heating furnace, etc., there were problems such as abrasion caused by gas flow and erosion caused by corrosive gas. Attempts have also been made to install heat insulating materials on the inner walls of various furnaces and containers to both insulate and prevent oxidation of the steel shell.
Seed insulation materials have high air permeability, and although they can provide insulation, they have the disadvantage that they cannot prevent oxidation of the iron skin. Attempts have also been made to coat the surface of the fibrous heat insulating material with a refractory material, but this approach has the disadvantage of being complicated during furnace construction. The present invention was completed as a result of various studies to solve the above-mentioned problems, and the gist of the present invention is to:
A fire-resistant flexible and processable material that exhibits flexibility after drying and is made by adding 1 to 20 parts by weight of inorganic fibers and/or organic fibers, synthetic resin emulsion and/or rubber latex as a resin component, and 3 to 50 parts by weight. 1 to 20 parts by weight of inorganic fibers per 100 parts by weight of a composite fire-resistant heat insulating material made of an inorganic fiber aggregate such as a fire-resistant flexible board having pressure shrinkability and fire-resistant raw materials such as alumina, magnesia, silica, siyamoto, silicon carbide, etc. and/or a fire-resistant and cleanable material which exhibits flexibility after drying and has fire-resistant flexibility and shrinkability under pressure, which is made by adding 3 to 50 parts by weight of organic fibers, synthetic resin emulsion and/or rubber latex as a resin component. This is a fireproof structure made by applying a composite fireproof insulation material made of a board and an inorganic fiber aggregate to the operating surfaces of various furnaces and containers and/or the inner walls of steel shells, etc., and has excellent heat insulation properties and long-term durability. The present invention provides an excellent composite fireproof insulation material and fireproof insulation structure.

A specific example of the composite fireproof heat insulating material of the present invention will be explained based on the drawings.

However, the present invention relates to these specific examples, thickness, length,
The invention is not limited to the width, the number of layers, etc., and changes and modifications within the gist of the invention are included in the invention. FIG. 1 is a sectional view of a main part of a composite fireproof heat insulating material made of a fireproof flexible board 2 and a fiber aggregate 1. As shown in FIG.

The fiber aggregate 1 is sheet-like and soft like cotton, and therefore has low strength, but when it is layered in this way, the fire-resistant flexible board acts as a core, making it easy to handle, and when it is installed, it can be easily handled on curved surfaces. It is also easy to modify it as desired. Furthermore, even when used for a long period of time, the fiber aggregate prevents pulverization due to crystallization, wear and corrosion due to gas flow, etc., and provides long-term insulation durability. Figure 2 shows hard fireproof board 3,
FIG. 2 is a sectional view of a main part of a composite fireproof heat insulating material made of a fiber aggregate 1 and a fireproof flexible board 2. FIG.

Although the composite refractory heat insulating material does not have flexibility, even when used for a long period of time, the fiber aggregate prevents powdering due to crystallization and provides long-term insulation durability. It can also be used as a lining in contact with molten metal, but when used for the purpose of insulation between the lining material and steel shell of a furnace or container, expansion of the lining material or application of static pressure of the molten metal, etc. Even when exposed to heat, the composite refractory heat insulating material does not shrink and a heat insulating furnace structure can be obtained. In the present invention, the fireproof flexible board 2 is mainly made of refractory powder and inorganic fibers, and preferably has flexibility and shrinkability under pressure at room temperature during construction.

Such a flexible fireproof board completely adheres to curved surfaces during construction, requires little processing during construction, and has excellent workability, and when combined with the fiber aggregate 1, the composite fireproof insulation material of the present invention Even if it is used as a part of the product, it can be used as it is without losing its original properties. This fire-resistant flexible board may be made of an inorganic refractory powder alone, an inorganic refractory powder and an inorganic fiber, an inorganic refractory powder and an organic fiber, or The main raw materials are 100 parts by weight of inorganic refractory powder, inorganic fibers, and organic fibers, and 3 parts by weight of a liquid binder, such as synthetic resin emulsion or/and rubber latex, which has a flexible surface after drying as a binder. A fire-resistant flexible board characterized by containing ~50 parts by weight can be used.

Alternatively, a fire-resistant flexible board can be used which is obtained by adding a foaming agent to the fire-resistant flexible board composition and foaming it to provide pressure shrinkability. Various forms of the fiber aggregate 1 used in the present invention can be used, such as slag wool, ceramic fiber, glass fiber, etc., which can be formed into a felt shape or laminated together. Select as appropriate depending on the conditions.

The means for forming the composite fire-resistant heat insulating material of the present invention is, for example, by bonding a fiber aggregate and a fire-resistant flexible board with a fire-resistant adhesive.

It can also be obtained by coating or pouring a fire-resistant flexible board clay on the top surface of the fiber aggregate and then drying it at 100° C. or higher for 2 hours or more. The composite refractory heat insulating material of the present invention can be installed as it is on the operating and/or non-operating surfaces (shell side) of various furnaces and containers by fixing it with known mortar or bolts. It can also be used by applying a pressure sensitive adhesive to the surface.

For example, construction workability can be further improved by lining the construction surface with a pressure-sensitive adhesive made of a mixture of fireproof material fine powder, an inorganic binder, and a synthetic resin or rubber adhesive, and pasting release paper. be done. Embodiment It has a structure as shown in FIG. 1, and 1 in the figure is 50]! Ceramic fiber aggregate with 55% AIl2O3 content, 2 is 5n thick A/
! As a result of using a composite refractory insulation material, which is a refractory flexible board containing 95% 203, for the walls of the hot rolling furnace, AIl2O, which is made of the same material as the ceramic fiber aggregate previously used, was used for the walls of the hot rolling heating furnace.
Comparatively, the composite fire-resistant insulation material containing 55% 3 becomes powder after 3 months of use and has to be replaced and repaired, but the composite fireproof insulation material of the present invention does not show any pulverization phenomenon after 6 months of use. The above long-term durability was confirmed.

[Brief explanation of the drawing]

The accompanying drawing is a sectional view of a main part showing an example of the composite fireproof heat insulating material of the present invention.

Claims (1)

[Claims] 1. 1 to 20 parts by weight of inorganic fibers and/or organic fibers, synthetic resin emulsion and/or rubber latex to 100 parts by weight of refractory raw materials such as alumina, magnesia, silica, silica, silicon carbide, etc. A composite fire-resistant heat insulating material comprising a fire-resistant flexible board and an inorganic fiber aggregate that exhibits flexibility after drying and has fire-resistant flexibility and shrinkability under pressure, to which 3 to 50 parts by weight are added as a resin component. 2 1 to 20 parts by weight of inorganic fibers and/or organic fibers, synthetic resin emulsion and/or rubber latex as a resin content to 100 parts by weight of refractory raw materials such as alumina, magnesia, silica, silica, silicon carbide, etc. A composite fire-resistant insulation material made of a fire-resistant flexible board and an inorganic fiber aggregate, which exhibits flexibility after drying and is compressible under pressure, is used for the operation of various furnaces and containers. A fireproof structure constructed on the inner wall of a surface and/or iron skin.