KR101829824B1 - Heat insulator composition include coal pumice stone and method for manufacturing heat insulator using this same - Google Patents

Abstract

The present invention relates to a fireproof insulator composition formed of coal pumice stone as a raw material and a method for manufacturing a fireproof insulator by using the same. The fireproof insulator composition formed of the coal pumice stone as the raw material is to prevent environmental pollution due to the coal pumice stone by manufacturing a second product (the fireproof insulator) by resource recovery of the coal pumice stone which is waste. The fireproof insulator composite formed of the coal pumice stone as the raw material is also to obtain expected effect in various fields such as a technical field and an economical field by forming a product formed of the coal pumice stone as the raw material and by reducing costs for disposal. According to the present invention, the fireproof insulator composition formed of the coal pumice stone as the raw material is formed of mixture of: a support unit in which 10-50 wt% of the coal pumice stone having 2-20 wt% of coal powder and 50-90 wt% of waste glass are mixed; and a foaming agent for foaming the support unit and filling a gap. The foaming agent is composed of one or more among: a first group filling steam; a second group filling carbon dioxide; and a third group filing carbon monoxide. According to the present invention, the method for manufacturing a fireproof insulator formed of coal pumice stone as a raw material includes: a first step of selecting 10-50 wt% of the coal pumice stone having 2-20 wt% of the coal powder, and 50-90 wt% of the waste glass and selecting the foaming agent; a second step of mixing a material selected by the first step; a third step of manufacturing a mixture mixed by the second step in the form of granules by a spray drier; and a fourth step of placing the granulated raw material manufactured by the third step into a forming frame and forming the fireproof insulator by foaming.

Description

Technical Field [0001] The present invention relates to a fireproof thermal insulating material composition using coal pumice as a raw material and a method for manufacturing a fireproof thermal insulation material using the same. BACKGROUND ART [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for recycling coal pumice, which is a waste resource, and more particularly, to prevent environmental pollution due to coal pumice by making a secondary product (fireproof insulation, etc.) Of course, the present invention relates to a fireproof thermal insulation material composition using coal pumice as a raw material, which can reduce costs for disposal and can achieve expected effects in various fields such as technical and economical through products made of coal pumice as a raw material, and a method of manufacturing a fireproof insulation material using the same will be.

Coal is a useful resource that has been used in various industries for a long time, such as thermal power plants, domestic fuels, and steel mill furnaces.

After the coal is mined, the remaining waste except coal is called pumice. The waste that is not economically produced during the drilling for heavy coal extraction is extracted from pumice and coal, and the remaining waste is called coal pumice. It is called gumi.

However, due to environmental pollution regulations, the pumice generated during mining process is difficult to dispose of due to environmental pollution regulations, so it is left in the coal mine, and the amount is also several hundred million tons (estimated to be 200 million tons in Gangwon province).

The composition of coal pumice consists of 40 ~ 70% of SiO2, 10 ~ 30% of Al2O3, 2 ~ 10% of Fe2O3, and other TiO2, CaO, MgO etc .

Although pumice pumice is a highly recyclable resource due to its physico-chemical properties, most of the coal pumice except for a small amount of aggregate for road pavement after crushing is mostly left in place and left untreated.

Most of the coal pumice is aluminum silicate minerals containing silica and alumina, but in Korea, there are very few high-quality raw materials that can be used for industrial purposes.

The coal pumice is mainly composed of residual ash after combustion and its main component is similar to clay minerals and can be used as raw material for cement and ceramics. Micropores generated in the combustion process can be applied to porous materials requiring high voids. Are being developed.

The patent document (registered patent No. 10-0695502) is an inorganic binder containing 35 to 60% by weight of gypsum or water glass; 0.5 to 15.0% by weight of a porous mineral selected from the group consisting of tuff, volcanic rock, pumice, pumice, pearlite, elvanite and vermiculite; 0.1 to 15.0% by weight of paper or pulp as fibrous material; From 0.1 to 5.0% by weight of an organic binder selected from the group consisting of aqueous acrylic, ethyl vinyl acetate and polyvinyl alcohol; 1.0 to 15.0% by weight of cement, lime, or a mixture thereof; From 0.1 to 5.0% by weight of a foam selected from the group consisting of rubber, styrofoam and urethane foam; From 0.1 to 3.0% by weight of a foaming agent; 0.2 to 1.0% by weight of a waterproofing agent; 0.1 to 0.5% by weight of glass fibers and the balance of water.

Patent Document 10-2004-0100120 discloses a flame retardant composition comprising 1 to 5 parts by weight of pulp, 20 to 70 parts by weight of a flame retardant selected from the group consisting of aluminum hydroxide, magnesium hydroxide, ammonium polyphosphate, pentaerythritol, From 2 to 10 parts by weight of a porous mineral selected from the group consisting of tuff, tuff, volcanic rock, pumice, pumice or a mixture of two or more thereof, glass fiber, mineral fiber, various metal fibers or a mixture of two or more thereof 0.5 to 5 parts by weight of an inorganic fiber and 1 to 20 parts by weight of an inorganic binder are dispersed in water to a predetermined width according to a conventional paper making method and then dehydrated and rolled up using a roll to form a number of layers The core material is made of a paper layer material formed by molding one surface or both surfaces of the core material, It has been made hayeoseo laminated.

The patent literature shows that pumice and glass are used, but there is a difference from refractory insulation technology that uses only a small amount of pumice as main material.

Registration No. 10-0695502 Published Patent No. 10-2004-0100120

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a secondary product through the recycling of coal pumice as a waste, thereby preventing environmental pollution caused by coal pumice, The present invention provides a refractory insulation composition using coal pumice as a raw material and a method of manufacturing a refractory insulation material using the same.

The fire-resistant and heat insulating material composition using coal pumice as a raw material according to the present invention comprises a support in which 10 to 50% by weight of coal pumice having a carbon content of 2 to 20% by weight and 50 to 90% by weight of waste glass are mixed, Wherein the foaming agent comprises at least one of a first group for charging water vapor, a second group for charging carbon dioxide, and a third group for charging carbon monoxide.

The first group of blowing agents is water glass, the second group is magnesite and limestone, and the third group is coal and coke.

A method for manufacturing a fire-resistant and heat insulating material using coal pumice as a raw material according to the present invention comprises: selecting 10 to 50% by weight of coal pumice having a carbon content of 2 to 20% by weight and 50 to 90% ; A second step of mixing the selected materials through the first step; A third step of preparing the mixed mixture through the second step in the form of a granule through a spray drier; And a fourth step of molding the granular raw material produced in the third step into a molding frame which does not require pressure molding and molding the granular raw material into a fire-resistant insulator through foaming.

According to the refractory insulation composition using the coal pumice material according to the present invention and the method of manufacturing the refractory insulation using the same, it is possible to prevent environmental pollution caused by coal pumice using the waste of coal pumice reaching hundreds of tons of tons, And the cost of coal pumice is low and the supply and demand is very good, so that it is possible to manufacture and supply the product (refractory insulation, etc.) at an inexpensive cost, thereby increasing the added value. As a result, the technology and industry for the recycling of coal pumice can be developed and contribute to the development of local and national industries.

In addition, the use of waste glass as well as coal pumice is effective in preventing environmental pollution (harmful substances caused by respiratory disorder) caused by waste glass and lowering manufacturing cost through lower supply price, thereby maximizing value added.

Further, by selecting the foaming agent, the voids of coal pumice are filled with a gas having excellent thermal conductivity to maximize the heat insulating performance, thereby improving reliability as a heat insulating material composition.

FIG. 1 and FIG. 2 are views showing a manufacturing process of refractory insulation material using coal pumice according to the present invention,
1 is a view showing a process of manufacturing spray-dried refractory insulation material,
Fig. 2 is a view showing a manufacturing process of a dry-grinding fire-proof insulator.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

The fire-resistant and heat insulating material composition using the coal pumice as a raw material according to the present invention is made of coal pumice, waste glass and a foaming agent.

The present invention is based on coal pumice as a starting material. As a result of confirming the characteristics of coal pumice for recycling of pumice pumice which has been left untouched, coal pumice prevents deterioration which is a disadvantage of glass without detection of heavy metals during high temperature processing It has been proposed to use these materials as raw materials for refractory insulation by using characteristics of coal pumice and glass. Especially, in order to maximize the recycling of waste materials and improve the environmental protection and value-added by using waste glass among the glass in accordance with the fact that coal pumice is waste, it is expected.

The coal pumice is selected by grinding and particle size selection, for example, 5 micron (± 10%) particle size, and the main component, SiO2, is homogeneous with the waste glass to prevent segregation between materials and Al2O3 has a bonding force Strengthens the structure of the glass. In other words, the glass is thermally deformed at a certain temperature, and as a fire-resistant insulating material, there is a disadvantage that the thermal deformation does not function during the fire. The coal pumice is combined with the waste glass to prevent the thermal deformation of the waste glass.

As described above, coal pumice is stable at 100 million tons, so it can be supplied at low unit price because raw material price is cheap.

By using coal pumice, various expected effects can be seen from the technical side, the economic industrial side, and the social side.

1. Technical aspects.

end. Progress in resource reclamation technology of waste resources

I. Promoting the availability of low-quality resources

All. Utilizing as raw material and material of ceramic industry

2. Economic and industrial aspects.

end. Prevention of light pollution into coal mines: 3,328 billion won

I. Prevention of loss of waste, forest restoration, improvement of water quality, prevention of subsidence: KRW 212.5 billion ('07 ~ '14)

All. Reduced cost of disruption prevention by utilizing stacked coal pumice

la. Utilizing coal by-products as raw material and material for ceramic industry

3. Social aspects.

end. Prevention of light pollution due to utilization of coal pumice

I. Reduction of waste slope left by coal mine closure (aesthetic restoration)

All. Reduced Accidents in Unsteady Slopes

la. Decrease in soil and river pollution near abandoned mines (Reduction of bleaching due to Al2O3 component)

hemp. Expected to reduce the cost of preventing light pollution by converting coal pumice into raw material

On the other hand, the present invention uses a coal pumice whose coal content is adjusted to 2 to 20% (by weight), preferably 10%.

The coal pumice containing 2 to 20% carbonates has a density of 0.590 g / cm3 and a compressive strength of 4301 Kpa, which is more suitable as an insulation material than other coal pumices.

The coal pumice containing the above 2 ~ 20% volcanic ash is prepared by first measuring the carbon content of coal pumice and then adjusting the mixing amount of coal pumice with different carbon content.

The waste glass has an irregular network structure and is excellent in refractoriness and heat resistance. For the present invention, a product having a fineness of 10 microns (± 10%) in particle size (crushed and sorted) is used, And the particle size of coal pumice and waste glass is the optimum particle size for supplementing the disadvantage of waste glass and it is also the optimum particle size value for the molding of refractory insulation.

Although waste glass can cause respiratory disturbance, the present invention solves the environmental pollution caused by waste glass because water is used in a water environment when water glass is used as a foaming agent.

The following effects can be expected according to the recycling of waste glass.

1. Technical aspects

end. Zero emission of resources through waste glass utilization

I. Promote utilization of waste glass technology

All. Ensure technological competitiveness by utilizing waste glass

2. Economic and industrial aspects

end. Cost savings due to waste glass utilization

I. Development of New Glass Market

All. Increase the utilization of raw materials and materials in the ceramic industry

3. Social aspects

end. Reduced cost of waste glass utilization

I. Reduce environmental hazards

All. Promoting resource utilization

la. New market development through new product development

The coal pumice and the waste glass constitute a support at a mixing ratio of 10 to 50% by weight of coal pumice and 50 to 90% by weight of waste glass as a support (main material) of the heat insulating material composition. The mixing ratio of coal pumice and waste glass is an optimum mixing ratio for the heat insulating performance and the deformation preventing performance of the waste glass, and if it exceeds the above ratio, the heat insulating performance is not deteriorated or the deterioration of the waste glass can not be prevented.

The foaming agent is used for foaming coal pumice and waste glass. In addition, various foaming agents are selected to fill voids with excellent thermal conductivity. One group including water glass, two groups including magnesite, and coal It is also possible that only one group is used alone, and two or more groups are mixed and used.

The first group is to fill water vapor, and the optimum water glass for foaming and vitrification is used.

The second group is to fill carbon dioxide, and magnesite and limestone are used. Magnesite and limestone can be used both singly and in combination.

The third group is a mixture of carbon monoxide and carbon dioxide, and coal and coke are used. Coal and coke can be used both singly and in combination.

These blowing agents differ in the amount of blending with the support (coal pumice and waste glass) and can be confirmed by the following Table 1.

Magnesite and limestone are the mixing ratios when used alone.

Coal and coke are the mixing ratios when used alone.

The composite gas is an example in which 1 group, 2 group and 3 group are used, and 2 groups of magnesite and limestone are freely adjustable within the above mixing ratio (1.5-20 parts by weight) (1-15 parts by weight).

The blending ratio of the two groups and the three groups in the blowing agent is a numerical value showing the same effect as that of water glass when used in place of water glass.

For example, 100% of water glass is replaced by about 67% of magnesite, about 95% of limestone, about 66% of coal, and about 55% of coke.

The method of manufacturing a fire-resistant insulator using a fire-resistant insulator composition using coal pumice as a raw material according to the present invention is characterized in that a method for manufacturing a fire-resistant insulated material by spraying, mixing, spraying, It is possible to produce a dry-grinding fire-proof insulator comprising a step of crushing-expansion molding.

1. The method of spray-dried fireproof insulation is as follows.

end. Material selection.

The above-described materials such as coal pumice and waste glass are weighed at a predetermined ratio to prepare a support, and a foaming agent is selected.

I. mix.

Add coal pumice, waste glass and foaming agent to mixer and mix. The mixing conditions are that they are put into a ball mill and mixed for 23 to 25 hours (preferably 24 hours).

All. Spray drying.

The mixture obtained in the previous step is placed in a spray drier and processed into granules by spray drying. The particle size of the final granulate is preferably 150 microns or less, which is the optimum particle size for foaming.

la. Foam molding.

A granular raw material is put into a mold (for example, a mold made of refractory bricks) for molding the product, and fireproofing is performed by foaming at 750 to 850 ° C for 1 hour and 40 minutes to 2 hours and 20 minutes.

After completion of the foaming molding, the refractory heat insulating material can be separated from the mold and stabilized at room temperature, for example.

The method of manufacturing the spray-dried refractory and thermal insulation agent has the effect of improving the productivity by shortening the process through spray drying.

2. Method for manufacturing dry-milled fire-resistant insulation material.

end. Material selection.

The above-described materials such as coal pumice and waste glass are weighed at a predetermined ratio to prepare a support, and a foaming agent is selected.

I. mix.

Add coal pumice, waste glass and foaming agent to mixer and mix. The mixing conditions are that they are put into a ball mill and mixed for 23 to 25 hours (preferably 24 hours).

All. dry.

Dry the mixed mixture in the previous step (drying conditions are 60 to 72 hours for drying time and 80 to 100 ° C for drying temperature).

la. smash.

The dried product is pulverized to 80 microns or less through a pulverizer (jaw crusher, disc mill, etc.).

hemp. Foam molding.

A granular raw material is put into a mold (for example, a mold made of refractory bricks) for molding the product, and fireproofing is performed by foaming at 750 to 850 ° C for 1 hour and 40 minutes to 2 hours and 20 minutes.

After completion of the foaming molding, the refractory heat insulating material can be separated from the mold and stabilized at room temperature, for example.

The manufacturing method of the dry-milled fireproof thermal insulation material is easy to supply and manufacture without using expensive equipment.

<Examples>

1. Materials.

Coal pumice (5 micron particle size), waste glass (10 micron particle size) and water glass as blowing agent are prepared. Coal pumice: waste glass: water glass = 1: 1: 1 (by weight).

2. Manufacturing.

end. Spray Drying: The material was put in a ball mill and mixed for 24 hours. The mixture was put into a spray dryer and processed into a granular raw material having a particle size of 80 microns. The granular raw material was put into a molding mold, Temperature and 2 hours, respectively, to produce a fire-proof insulator

I. Crushing formula: Material blending - Drying - Crushing (80 micron particle size) - Refractory insulation was prepared by foaming (800 ° C, 2 hours).

The refractory insulator according to the present embodiment manufactured by each process is 50 cm in width, 50 cm in length, and 5 cm in thickness.

3. Characteristic test.

The results of testing the porosity, thermal conductivity, density, compressive strength and softening point of the refractory insulation according to the present embodiment are shown in Table 2 below.

Evaluation items
(Key Performance Spec ^{1 )} )
unit
Example
Standards and certification standards
Assessment Methods Item  1. Porosity % 80 - Official grades  2. Thermal conductivity W / m · K 0.05 KS L 1604 Official grades  3. Density g / cm3 0.1 KS M ISO 8130-2 Official grades  4. Compressive strength kPa 900 KS L 1203 Official grades  5. Softening point ℃ 700 KS L ISO 7884-6 Official grades

It is confirmed that the spray dried fireproof thermal insulation material and the dry-milled fireproof thermal insulation material exhibit the same characteristics only by the manufacturing method. The porosity, thermal conductivity, density, compressive strength and softening point are both standard or certification standards as shown in Table 2 It was confirmed that it satisfied. It was also confirmed that the examples using the two groups and the three groups as the blowing agent exhibited the same results as those in Table 1.

Claims (10)

A support in which 10 to 50% by weight of coal pumice with a carbon content of 2 to 20% by weight and 50 to 90% by weight of waste glass are mixed, and a foaming agent for filling the void and filling the void, A second group for charging carbon dioxide, and a third group for charging carbon monoxide and carbon dioxide,
2 to 25 parts by weight of water glass as a blowing agent of the first group, 1.5 to 20 parts by weight of a mixture of magnesite and limestone as a blowing agent of the second group, and 1 to 20 parts by weight of a mixture of coal and coke as a blowing agent of the third group By weight to 15 parts by weight based on the total weight of the flame retardant. delete delete delete delete A method of manufacturing a refractory thermal insulation material using a refractory thermal insulating material composition using coal pumice as a raw material according to claim 1,
A first group in which a mixture containing 10 to 50% by weight of coal pumice with a carbon content of 2 to 20% by weight and a 50 to 90% by weight of waste glass is selected and a first group for filling water vapor, a second group for filling carbon dioxide, A first step of selecting a third group of foaming agents filling carbon dioxide;
A second step of mixing the selected materials through the first step;
A third step of preparing the mixed mixture through the second step in the form of a granule through a spray drier;
And a fourth step of forming the granular raw material produced in the third step into a mold and forming the refractory insulator through foaming,
Wherein the second step comprises mixing 2 to 25 parts by weight of water glass as the foaming agent of the first group, 1.5 to 20 parts by weight of a mixture of magnesite and limestone as the foaming agent of the second group, And 1 to 15 parts by weight of a mixture of coke and coke is mixed with the mixture. [Claim 7] The method according to claim 6, wherein the coal pumice, the waste glass, and the foaming agent are put into a ball mill and mixed for 23 to 25 hours in the second step. [Claim 7] The method of claim 6, wherein the third step is leveling the granules to 150 microns or less. [9] The method of claim 8, wherein the fourth step is a step of foaming the granular raw material at a temperature of 750 to 850 [deg.] C for 1 hour and 40 minutes to 2 hours and 20 minutes to form a refractory insulator. (EN) METHOD FOR MANUFACTURING RESIN INSULATION MATERIAL USING COMPOSITION. A method of manufacturing a refractory thermal insulation material using a refractory thermal insulating material composition using coal pumice as a raw material according to claim 1,
A first group in which a mixture containing 10 to 50% by weight of coal pumice with a carbon content of 2 to 20% by weight and a 50 to 90% by weight of waste glass is selected and a first group for filling water vapor, a second group for filling carbon dioxide, A first step of selecting a third group of foaming agents filling carbon dioxide;
A second step of mixing the selected materials through the first step;
A third step of drying the mixed mixture through the second step;
A fourth step of pulverizing the dried material dried by the third step into fine particles;
And a fifth step of putting the pulverized material pulverized through the fourth step into a mold and forming the refractory material through foaming,
Wherein the second step comprises mixing 2 to 25 parts by weight of water glass as the foaming agent of the first group, 1.5 to 20 parts by weight of a mixture of magnesite and limestone as the foaming agent of the second group, And 1 to 15 parts by weight of a mixture of coke and coke is mixed with the mixture.

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