KR100664567B1 - Method for producing burned clay bricks recycled from wastes and the recycled bricks made by the same - Google Patents

Abstract

A process of fabricating fired clay brick recycled from waste stone powder and waste sludge is provided to form the brick with anti-sliding film useful for road block, revetment or floor of buildings by using a mixture of the waste tone powder and waste sludge from sewage treatment plants and further a binder to combine the waste with clay source for the fired clay brick. The process includes the steps of: blending 50-65wt.% of clay and 35-50wt.% of waste by an agitator at 100-200rpm for 2 to 3 hours; curing the blend to have water content of 20-25% by aging the blend in an aging chamber for 2-10 days; crushing the cured mixture in due order to have particle sizes of 3mm, 1.5mm then 0.7 to 0.8mm, and forming the mixture into a shaped product then cutting the product into desired size of products; and curing the shaped product with the desired size in a chamber at 1000 to 1200deg.C for 24 to 48 hours to complete the fired clay brick. The brick further contains 5-10wt.% of a binder to total weight of the mixture to have improved binding property and adhesiveness.

Description

Method for producing recycled fired clay bricks by waste and method for recycling fired clay bricks {Method for producing burned clay bricks recycled from wastes and the recycled bricks made by the same}

1 is a perspective view of a fired clay brick according to the present invention

2a to 2e is a simplified view of the manufacturing process of the calcined clay brick according to the present invention,

2a is a process diagram of mixing clay and waste

2b is a kneading and grinding process diagram of the mixture

2C is an extrusion and shaping process diagram of the mixture

2d is a process diagram for forming a non-slip layer in a fired block

Explanation of symbols on the main parts of the drawings

1: Block 2: non-slip layer

The present invention relates to a fired clay brick recycled from waste stone and waste sludge generated in a quarry, sewage treatment plant and incinerator, and more specifically, waste sludge generated from a quarry and sewage treatment plant and incinerator. Collect it, mix it with a certain amount of clay and binder, press-mold it, and dry and heat it to be used as building bricks, sidewalk blocks, building flooring materials, etc. And it relates to a method for producing a recycled plastic clay brick having a characteristic of reducing the factors of environmental pollution, and to a recycled plastic clay brick by the production method.

Generally, a large amount of stone powder is generated in a quarry, an aggregate collection site, and a stone processing business. Such powder powder has a problem of polluting local rivers or farmland, and the waste stone powder is collected using a sedimentation tank separately and then used in landfill. It is discarded by.

In addition, sludge (sludge) generated in a water treatment plant, sewage treatment plant or incineration plant is also classified as a waste, and is disposed of by landfilling through a collection process.

However, in order to collect and dispose of the waste stone powder and waste sludge as described above, a large collection facility and a collection device must be provided as well as the waste stone powder and waste sludge collected therefrom are processed into a solid or mucus through a predetermined treatment process. It is then mixed with a certain amount of clay and then disposed of in landfills for disposal.

Therefore, excessive disposal costs are required in the above disposal process, and the designated disposal site must also not affect the soil or environment of the adjacent area, so pretreatment and after-care are very strict, resulting in very wasteful budget. It is extreme.

In particular, the waste-rock powder and waste sludge are not collected and disposed of themselves, but the ratio of the collected clay and waste-rock powder or waste sludge in order to obtain a natural regeneration from the environmental aspects is 90% by weight: 10 Since the landfill is mixed in a proportion of about 1% by weight, the loss of clay is also severe, and since the volume and landfill volume of the mixed clay are excessively increased, it is difficult to designate and establish a waste site.

Accordingly, there is a lot of interest in the manufacture of clay brick using the waste-rock powder in the root, mixing the clay, silt and stone powder in a weight ratio of 4: 3: 3, and the mixed raw material of about 2mm in size Pulverizing the raw material, containing about 25% of the moisture in the pulverized raw material, injecting and cutting the raw material containing the moisture into a desired shape, and molding the semi-finished product, and forming the molded semi-finished product at 110 to 130 ° C. Drying the clay for about 4 days, calcining the dried semi-finished product at about 1250 ° C. for 18 to 22 hours, and cooling the calcined semi-finished product for 7 to 9 hours. The manufacturing method has been proposed,

Another proposal is to mix 5 to 45% by weight of waste silica fine powder with silica content of more than 97% and particle size adjusted to 170 mesh, 55 to 95% by weight of clay and 0 to 5% by weight of glass powder, and then adjust the water content of the mixture. 17 to 20% of the clay brick was molded using a vacuum extrusion molding machine and dried for 36 to 48 hours at 80 to 200 ° C for 24 to 36 hours at a temperature of 1,100 to 1,200 ° C. A manufacturing method has been proposed.

However, the clay brick manufacturing method using the waste-rock powder as described above and the clay brick is manufactured by using the bonding force of the clay and waste-rock powder, and can be manufactured even with relatively high content of waste-rock powder, thus effectively recycling the waste-rock powder. While there are possible advantages,

Waste sludge from water treatment plants, sewage treatment plants and incinerators cannot be used.

In other words, in case of waste sludge generated in water purification plant, sewage treatment plant and incineration plant, it has very different properties from clay, so the bonding strength with clay is extremely low. Therefore, in the case of mixing bricks with clay, incomplete molding Despite this, the strength is extremely low and can not be used as a building brick or block.

In addition, in order to improve moldability and strength, it is inevitable that the waste sludge content is reduced to 5% by weight or less, which is a problem that the practical meaning disappears in terms of resource recycling.

In particular, in the case of the waste-rock powder or waste sludge as described above, since the daily emissions are more than 70 to 80 tons, they do not have a sufficient amount to consume them, so all of them are reclaimed and disposed of, so excessive expenses and landfills and facilities are secured. Is an agent.

The present invention has been made to improve the problems described above, and mixed waste of waste stone powder and waste sludge with a certain amount of clay, and mixing the binder with these mixtures so that clay and waste are bonded and fixed by the binder. After extrusion molding and firing, the non-slip layer using waste resources is formed on the surface of the fired block,

Through the active use of waste, it is very economical because it can reduce the cost as well as reduce the logistics and disposal costs according to the disposal of waste by increasing the recyclability of resources, and it is very economical due to the compact structure of clay and waste and binder. It is to improve the strength, and the non-slip layer using waste resources can be used as a sidewalk block, revetment block, eyepiece facility, building flooring, etc., which can prevent slipping. It is an object of the present invention to provide a method for producing recycled fired clay bricks using waste having very environmentally friendly characteristics, and thus recycled fired clay bricks.

Hereinafter, preferred embodiments of the present invention will be described.

1 is a perspective view of a fired clay brick according to the present invention.

First, looking at the manufacturing method of the recycled plastic clay brick according to the present invention,

50 to 65% by weight of clay made of white clay or red clay and 35 to 50% by weight of waste sludge or waste sludge produced in sewage treatment or incineration, using a stirrer for 100 to 200 RPM A mixing step of stirring;

Curing the mixture in a aging room at room temperature for 2 to 10 days, and controlling the humidity to ripen so that the water content of the mixture is 20 to 25%;

A kneading and grinding step of sequentially pulverizing the aged mixture so as to have a particle size of 3 mm, a particle size of 1.5 mm, and a particle size of 0.7 to 0.8 mm from a stepwise grinding device such as a mill;

A bonding step of adding and stirring a binder made of epoxy, acryl, and urethane based on 5 to 10% by weight based on the total weight of the kneaded and ground mixture;

A molding step of extruding the mixture in which bonding and adhesion are increased by a binder;

A shaping step of cutting the molded product to a predetermined size;

Firing the molded product in a chamber at 1000 to 1200 ° C. for 24 to 48 hours;

A coating step of applying, together with the adhesive, an anti-slip agent made of particulate waste synthetic resin or waste rubber having a size of 1 to 3 mm on the surface of the cured molding;

The non-slip agent is applied to the molded article is maintained for 1 to 3 hours in the chamber having an internal temperature of 140 ~ 200 ℃ is completed, including the fusion step for the non-slip agent is melted and fixed.

The structure of the fired clay brick completed by such a manufacturing method is

50 to 60% by weight of clay of either red clay or white clay and 5 to 10% by weight of acrylic or urethane based on the total weight of the mixture of 35 to 50% by weight of waste consisting of waste stone powder or waste sludge. On the surface of the block 1 cured in a state where a binder of one kind of epoxy series is mixed,

The anti-slip layer (2) is made of a particulate anti-slip agent made of any one of the waste synthetic resin or waste rubber having a size of 1 ~ 3mm.

The manufacturing method of the recycled fired clay brick using the waste of the present invention by the above production method and configuration and the manufacturing process for each process of the recycled fired clay brick by the same will be described in detail as follows.

The main material of the clay brick according to the present invention is clay and waste which are raw materials of bricks as shown in FIG. 2A, and the clay may be selectively used as red clay and white clay to determine the basic color of the brick. If necessary, pigments of various colors may be added.

In addition, wastes are incinerated from waste stone powder (for example, granite of granite, marble, quartzite, etc.) generated in quarries, aggregate collection sites and stone processing plants, waste sludge and incineration generated from water treatment plants and sewage treatment plants. Sludge etc. may be used.

Here, the waste-rock powder and the waste sludge and the like are classified as wastes which are usually impossible to recycle or difficult to be discarded by almost all of the investment.

In mixing such clays and wastes, the content is 50 to 65% by weight of clay and 35 to 50% by weight of waste, respectively, and mixed for about 2 to 3 hours in an agitator of 100 to 200 RPM. do.

In this mixing step, the clay and the waste will have an evenly mixed state, and the mixture will have a curing time of about 2 to 10 days in the aging room at room temperature.

This curing step aims to ensure that the clay and waste are organically bonded to each other, while the moisture content of the clay and waste affects each other evenly so that the overall moisture content is 20-25%. It is for making the moldability and cutting property excellent in the.

The aged mixture is not only irregular in particle size of clay and waste, but also contains excessively large particles, which are then kneaded and pulverized into fine particles by a step pulverizer as shown in FIG. 2B. Grinding device is usually the first crushing to have a particle size of 3mm, and the second pulverization to a particle size of 1.5mm by pulverizing again, it is crushed again to a size of 0.7 ~ 0.8mm to increase the physical strength of the brick Of course, the moldability is excellent.

Such a pulverization process is performed by a crushing mill and the like, while being crushed to a suitable particle size while passing between rollers pressed up and down, and the clay and waste are mixed and kneaded with each other, so that their mutual bonding force is further improved. Will be.

In this state, a certain amount of binder is added to the mixture and the binder is evenly mixed. The binder may be an acrylic, urethane or epoxy binder. The binder may be selected according to the type or nature of the waste. It can be used.

In addition, the content of the binder is to be mixed in an amount corresponding to about 5 to 10% by weight based on the total weight of the mixture, so that the heterogeneous physical properties of the clay and the waste have an excellent bonding state with each other by the binder. By filling the fine pores generated in the mixture by the binder to increase the filling properties and maintain a dense connective structure to improve the durability and strength of the brick.

As such, the mixture of clay, waste, and binder, respectively, is continuously extruded and produced by an extruder having a constant extrusion shape, as shown in FIG. 2C. The extrudate is cut to the size of the brick as needed. You will go through the process.

This extrusion and cutting process is not different from the conventional brick manufacturing process, so a detailed description thereof will be omitted.

In addition, the extrudates cut as described above are fired for 24 to 48 hours in a chamber having an internal temperature of 1000 to 1200 ° C., and the block 1 in the fired state forms an anti-slip layer 2 on its surface. Will be.

Here, the non-slip layer (2) is a finely pulverized waste synthetic resin, waste rubber, etc. as shown in Figure 2d and applied to the surface of the block (1), the process for forming the anti-slip layer (2) Looking at it,

The waste synthetic resin or waste rubber is crushed finely so as to have a particle size of 1 to 3 mm, and an anti-slip agent of this size is evenly applied to the entire surface of the block 1 in the fired state.

At this time, the anti-slip agent is mixed with the anti-slip agent, or the anti-slip agent is applied to the surface of the block 1 so that the particulate non-slip agent is evenly applied and adhered to the surface of the block 1. .

When the block 1 in such a state is put in a chamber having an internal temperature of 140 to 200 ° C. for about 1 to 3 hours, the surface of the slipper is melted and fused to the surface of the block 1.

The chamber temperature at this time is ideally set to the same temperature as the melting point of the anti-slip agent, the fusion time in the chamber is a non-slip agent is fused to the surface of the block (1) while the surface of the non-slip agent begins to melt The time to start becoming ideal is ideal.

In particular, the temperature inside the chamber should be set differently according to the material of the non-slip agent, and in the case of the material having a low melting point, it should be made lower. .

The fusion of the anti-slip agent forms a non-slip layer of numerous protrusions on the surface of the fired clay block, which is very excellent when used as a finishing material such as a sidewalk block, a coastal block and coastal fittings, and an eyepiece facility. Will have friction.

The method of manufacturing recycled fired clay bricks using the waste of the present invention as described above and recycled fired clay bricks thereby increase the recyclability of resources through active use of wastes, as well as cost reduction and logistics and disposal costs It is very economical because it is possible to save and improve the durability and strength of brick by the compact structure of clay and waste and binder, and the sidewalk block, the revetment block, the eyepiece facility, the building flooring, etc. by the non-slip layer using waste resources. When used as a non-slip feature can be obtained, and by using various wastes to prevent the environmental impact of these wastes is very eco-friendly effect.

Claims (4)

50 to 65% by weight of clay and 35 to 50% by weight of waste are stirred at 100 to 200 RPM for 2 to 3 hours using a stirrer, The mixture is cured in a aging chamber at room temperature for 2 to 10 days to mature so that the water content is 20 to 25%, The aged mixture is crushed sequentially from the stepwise grinding device to have a particle size of 3 mm, a particle size of 1.5 mm, and a particle size of 0.7 to 0.8 mm, extrude the mixture, and then cut the extruded molding to a certain size, In the method for producing a recycled plastic clay brick is completed by curing the molding in a chamber of 1000 ~ 1200 ℃ for 24 to 48 hours, By adding and stirring a binder corresponding to 5 to 10% by weight based on the total weight of the kneaded and ground mixture, the binding and adhesion of the mixture are increased, A granular anti-slip agent having a size of 1 to 3 mm is applied to the surface of the fired block together with the adhesive, and then the anti-slip block is applied to the inside of the chamber having an internal temperature of 140 to 200 ° C. for 1 to 3 hours. Method for producing a recycled plastic clay brick using waste, characterized in that to be fused. delete delete 50 to 60% by weight of clay of either red clay or white clay and 5 to 10% by weight of acrylic or urethane based on the total weight of the mixture of 35 to 50% by weight of waste consisting of waste stone powder or waste sludge. On the surface of the block 1 cured in a state where a binder of one kind of epoxy series is mixed, Recycled clay clay brick using waste, characterized in that the non-slip layer (2) is formed by a particulate anti-slip agent made of any one of waste synthetic resin or waste rubber having a size of 1 ~ 3mm.

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