JPH1053443A - Glass aggregate and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a glass aggregate, capable of carrying out a hydrating reaction between the aggregate and a cement and good in adhesion to an asphalt or a synthetic resin by pulverizing a waste glass and fusing a specific powdery or granular material to the resultant glass powdery or granular material. SOLUTION: This glass aggregate C comprises powdery or granular materials (e) and (f) composed of ceramics, silica sand, an inorganic oxide, etc., fused to a glass powdery or a granular material B formed by pulverizing a waste glass D and is produced by fusing the powdery or granular materials (e) and (f) composed of the ceramic powdery or granular material, preferably a baked papermaking sludge or the silica sand, the inorganic oxide (e.g. alumina), etc., to the glass powdery or granular material B, formed by pulverizing the waste glass D and preferably provided with roundness in broken peripheral edges. Furthermore, the glass aggregate C can be produced by crushing the waste glass D with a crushing device 1, pulverizing the resultant glass pieces A with a pulverizing device 2, providing the glass powdery or granular material B, then introducing the powdery or granular material B into a heating device 3, thermally softening the powdery or granular material B and fusing the powdery or granular materials (e) and (f) composed of the ceramics or silica sand, inorganic oxide, etc., to the softened powdery or granular material B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aggregate obtained by fusing particles such as ceramics and sand to powder or granules obtained by pulverizing waste glass and mixing with cement or asphalt for use. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass aggregate having no corners and a method of manufacturing a glass aggregate obtained by heating and melting a powder obtained by pulverizing glass and fusing powder particles of a ceramic or other inorganic material having hydration reactivity.

[0002]

2. Description of the Related Art Among glass bottles, beer bottles and empty bottles of one bottle have been collected and reused. In recent years, however, various shapes and colors have been changed due to changes in lifestyle and demands from logistics. With the increasing use of waste bottles, most of the bottles are either disposed of together with household waste or left behind in the shade, causing social problems. In addition to the waste of these bottles, a method of disposing of a large amount of industrial waste such as a glass plate discharged from a construction site or the like has been required from a social environment viewpoint. These discarded glass shards have sharp and sharp cross-sections, and may hurt people. In addition, they do not deteriorate over time and also pose a problem because they harm the environment. I have.

[0003] As one of methods for reusing such troublesome waste glass, it is conceivable to use it as an aggregate of building materials such as concrete. For example, as described in Japanese Utility Model Application Laid-Open No. 53-20252, waste glass is crushed with a crusher or the like, and then the sharp corners of the glass pieces are rounded with a ball mill or the like. Some are used as cement materials. However, such glass particles have a smooth glassy surface and do not absorb water.Therefore, they do not have hydration reactivity with cement and have no tackiness, so they are not suitable for use as concrete materials. Absent.

[0004] In addition, even glass particles obtained by simply grinding glass have a smoother surface than natural gravel or sand, have no adhesive force to cement, and have sharp sharp edges around the particles, so that workers have to sharpen. Risk of injury. Therefore, a method described in Japanese Patent Application Laid-Open No. 2-116665 can be considered as a method of finishing the glass particles into an aggregate having a large adhesive force with the cement and having no risk of injury to an operator. Waste glass is crushed into fine particles, and then added with quartz sand and water to the glass particles in a rotating drum and ground to roughen the surface of the glass particles and at the same time sharpen sharp edges to make them round. Alternatively, the glass particles are treated with hydrofluoric acid and chemically etched to roughen the surface to form an aggregate.

[0005] However, even if the surface of the glass particles is roughened by the above method, there is still no hydration reactivity, and it takes a long time to roughen the surface. Since it is necessary to treat wastewater after use, the cost of the wastewater treatment device and hydrofluoric acid is too high, and there are various problems to be solved for practical use. On the other hand, as concrete structures become more widespread in response to changes in social urban structures and housing conditions, there is a shortage of conventional aggregates such as river sand and gravel used for concrete, and rocks are crushed. It is the current state of the building industry that crushed stone is being used as a substitute, and the natural destruction caused by crushed rock has become a problem.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method for crushing and treating various types of glass waste discharged as domestic garbage and industrial waste so as not to leave sharp and sharp corners in glass particles. In addition, there should be no risk of injury to the handling personnel, and a surface treatment that improves the adhesive strength with cement, etc., to make it a form that can be used as aggregate such as concrete or asphalt The purpose of the present invention is to treat glass waste and at the same time to help solve the shortage of aggregate in the civil engineering and construction industries.

[0007]

After the recovered glass waste is crushed by a crusher, the crushed glass with sharp sharp corners is crushed and coarsened to eliminate the corners and then sieved to obtain appropriate glass powder. In order to add hydration reactivity with cement to the glass powder separated into granules, it is combined with ceramics such as alumina, granules such as silica sand and gravel, and other hydratable inorganic materials in a heating furnace. To the surface of the melted glass powder particles, and then the ceramics or silica sand particles are fused to the surface, then taken out of the heating furnace and cooled to have an adhesive force between cement and asphalt. Formed glass aggregate.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Glass pieces D recovered from waste
Is crushed to an appropriate size by a crusher 1 equipped with a roller crusher or the like, and the crushed pieces A are introduced into a cylindrical cyclone-type crusher 2 to be crushed and crushed in a high-speed air stream. Then, the glass powder granules having no sharp corners are formed, and the glass powder granules are sieved and separated into glass powder particles B having an appropriate particle size. Next, the glass powder B is supplied to a heating furnace 3 such as a rotary kiln or the like together with ceramics and silica sand powder, and is stirred while being heated to such an extent that the surface of the glass powder B is melted. After the particles e and f of ceramics, silica sand, etc. are fused to each other, they are discharged out of the heating furnace and cooled to cool the glass aggregate C.
And

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The glass aggregate of the present invention will be described below based on a specific example with reference to the drawings. According to the present invention, as shown in FIG. 2, sharply sharp corners of crushed pieces A obtained by crushing waste glass are crushed into glass particles B, and the glass particles B are heated and melt-softened. Fused particles e and f of ceramics, silica sand, etc. are fused to the surface to make glass aggregate C
And the manufacturing method.

[0010] Glass pieces D that are separated and collected from household waste or industrial waste are put into a crusher 1 and crushed into crushed pieces A having a size suitable for aggregate by a roller crusher 1a. Next, this glass shard A
Into a cylindrical cyclone-type pulverizer 2 from an inlet 2a provided at an upper portion thereof, and collide with a cylindrical wall surface by a high-speed air flow supplied from a blower port 2b. By colliding in the air stream,
The sharp and sharp corners of the glass crushed pieces A are removed and shaped into rounded glass powder granules B.

The glass powder granules B shaped as described above are sieved and classified to be classified into types according to applications. The glass powder B thus separated is quantitatively charged into a heating furnace 3 composed of a rotary kiln heated to a temperature of about 700 to 900 ° C. suitable for melting only the surface of the glass particles. .

In the heating furnace, a moving bed made of ceramics, particles e, f of silica sand, gravel or the like filled in the kiln bottom wall is heated by hot air sent from the hot blast furnace 3b. Heated and charged glass powder B
Is transferred while being stirred together with the ceramic particles and the like, the surface thereof is heated and softened, and the ceramic particles are fused. Then, the powder particles e and f of ceramics or the like are fused to the surface of the glass powder particles by an appropriate amount, and the glass powder particles C having rounded corners are discharged out of the kiln and then cooled. It becomes aggregate.

In the above embodiment, the glass crushed pieces A provided by the crusher in the crushing step of the first step are crushed to a predetermined particle size in the crushing step of the second step. The glass powder granules B were formed using the cylindrical cyclone-type pulverizer 2, but the present invention is not limited to such a cyclone-type pulverizer, and a hammer mill and other ordinary mechanical pulverizers may be used. By pulverizing, the glass powder B coarsened to a predetermined particle size can also be obtained. Also, II
Although a rotary kiln was used as the heating furnace 3 for heating and softening the surface of the glass particles B in the heat treatment step of the step I, the present invention provides a method in which ceramic particles or silica sand having a melting point higher than that of glass are brought close to the glass melting point. It is intended to be fused to the surface of the glass powder while continuously heating it together with the glass powder in the state where it is heated to It is also possible to perform a heat treatment by a heating furnace using a floor to perform fusion.

In the above embodiment, in the third step, powder particles e and f of alumina or other ceramics or powder particles e and f of silica sand or gravel are fused to the surface of the glass powder particles B. At least the surface treatment was performed, but this is a treatment for imparting hydration reactivity with the cement to the glass particles. In the present invention, when oxides such as Si, Ca, Mg, etc., limestone, gypsum, kaolinite, etc. were used as powders, the bonding strength with cement was sufficient in each case, so that the melting point was lower than that of glass. It has been found that alumina or other metal or non-metal oxides having a high N content may be used. These oxides can be used in a shape smaller than the particle size of the glass powder particles B, and the main component of the cement is composed of oxides such as Ca, Si, and Al. Therefore, it is considered that it is easy to engage in hydration together with these oxides.

Subsequently, the sludge of the papermaking slag generated in the papermaking process was dried and incinerated and fused to the surface of the glass powder B by using ceramic powder made of ash. It turned out that it has sufficient binding power. This is because the sludge of papermaking slag contains ink bleeding and polishes such as alumina, clay and calcium salts. Further, the glass aggregate of the present invention is not limited to cement or asphalt and the like, and can be used as a mixture with building materials made of mortar, stucco, synthetic resin, and other kneaded materials.

[0016]

As described above, the hydration reaction with the cement becomes possible by fusing the hydrated powder such as ceramics to the glass powder as described above.
Since the surface of the glass particles is porous or fine irregularities due to the fused ceramic or other powder,
Adhesion with asphalt and synthetic resin is also improved, and furthermore, when the glass surface is heated and softened to fuse ceramics, etc., the corners of the glass particles are rounded as a whole,
There is no danger of injury to workers when handling as aggregate. Since the glass aggregate of the present invention is safe without damaging tires and people even when used as a pavement material for roads, it can be particularly used for a color promenade using synthetic resin, It lasts longer because the material does not separate from the paving material.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a manufacturing process of a glass aggregate of the present invention.

FIG. 2 is a view showing a processing state of glass particles in a manufacturing process of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 crushing device 2 crushing device 3 heating device A crushed piece B glass particle C aggregate D waste glass e ceramic particle f ceramic powder

Claims (5)

[Claims] A glass aggregate obtained by fusing a powder made of ceramics, silica sand, inorganic oxide or the like to a glass powder formed by grinding waste glass. 2. The glass aggregate according to claim 1, wherein the glass powder granules have a rounded peripheral portion at a fractured edge. 3. The glass aggregate according to claim 1, wherein the ceramic powder comprises a fired product of papermaking sludge. 4. A glass piece obtained by crushing waste glass is crushed by a crushing device into glass particles, and the glass particles are introduced into a heating device to be softened by heating, and the ceramic or silica sand, inorganic oxide, A method for producing a glass aggregate, characterized by fusing powder or granules made of an object or the like to form an aggregate. 5. The method according to claim 4, wherein the glass powder is heat-softened and fused in a fluidized bed made of a powder of a ceramic or an inorganic oxide such as silica sand in a heating device. The method for producing glass aggregate to be described.