KR20200121774A - Method of Producing Substitute for Ground Material of Base Course from Waste Adsorbents - Google Patents

Abstract

The present invention relates to a method for manufacturing a basal ground material or a substitute for basal ground using waste adsorbents generated from various manufacturing plants or places of business and, more specifically, to a method for manufacturing a basal ground material using waste adsorbents to manufacture the basal ground material which is eco-friendly and excellent in permeability by adding washed sand to recycled aggregate containing waste adsorbents. The method for manufacturing the basal ground material comprises the following steps: injecting and crushing recycled aggregate, waste adsorbents, and general washed sand to be sorted; adjusting the size of a particle of the sorted material; performing primary mulling while putting a firming agent to the material with adjusted particle size; secondarily sorting the mulled material; and performing secondary mulling while putting a neutralizing agent to the secondarily sorted material. The recycled aggregate includes waste molding sand, slag, and ceramic fragments, and the waste adsorbents include anthracite and washed sands.

Description

Method of Producing Substitute for Ground Material of Base Course from Waste Adsorbents}

The present invention relates to a method of manufacturing a base material or a donated ground substitute using waste absorbents generated in various production plants or business sites, and specifically, environmentally friendly and water-permeable by adding cleaning sand to the recycled aggregate including the waste absorbent. It relates to a method of manufacturing a base material using a waste absorbent material for the production of an excellent base material.

In general, a layer that is located on the upper roadbed in asphalt pavement and has the function of uniformly transmitting the load acting on the surface layer to the roadbed is called a base layer. Further, the base material refers to a material for forming such a base layer, and in general, a coarse or asphalt mixture may be used. For civil works, an auxiliary base layer is formed on the roadbed or on the roadbed, and a base layer may be formed on the auxiliary base layer, and as the base material, materials such as dreg, ascon, waste ascon or waste-concrete are used.

As a prior art related to the base material, there is Patent Publication No. 2005-0028148'Base material for sports fields'. In the prior art, in the base material provided with a blind culvert for drainage treatment of groundwater and infiltrate, a frost protection layer that prevents the ground of the playground from freezing in winter, and an auxiliary base layer of gravel installed on the upper surface of the frost protection layer, the Disclosed is a base layer structure having a buffer and drainage layer provided on the upper surface of the auxiliary base layer.

Another prior art related to the base material is Patent Registration No. 0710514,'The method of sorting recycled aggregate for road auxiliary material and road auxiliary material using the selected recycled aggregate'. The prior art discloses a road-assisted substrate regenerated from waste-concrete, combustible waste, recycled aggregate, inorganic purified sludge, waste-casting sand and stone dust sludge.

The base material must meet established standards for compressive strength, water permeability and salt content, while for example lead (Pb), copper (Cu), arsenic (As), mercury (Hg), cadmium (Cd) or chromium (Cr). It should not contain harmful substances such as In addition, it is advantageous that the material used as the base material should not be depleted, can be recycled, and can be produced at low cost.

The prior art does not disclose a base material or an alternative base material having such conditions.

The present invention has the following objects to solve the problems of the prior art.

Prior Document 1: Public Patent No. 10-2005-0028148 (Antoka Co., Ltd., published on March 22, 2005) Base material for sports grounds Prior Document 2: Registration Patent No.0710514 (Phosphorescent Environment Co., Ltd., published on April 16, 2007) Method for sorting recycled aggregate for road auxiliary substrate and road auxiliary substrate using recycled aggregate selected by the method

An object of the present invention is to provide a method for manufacturing a base material using an environmentally friendly waste absorbent material that meets the standard value.

According to a preferred embodiment of the present invention, a method of manufacturing a base material using a waste absorbent comprises the steps of pulverizing and sorting while introducing recycled aggregate, waste absorbent, and general cleaning sand; Adjusting the particle size of the selected material; First kneading while adding a solidifying agent to the material whose particle size is adjusted; Secondly selecting the kneaded material; And secondary kneading while injecting a neutralizing agent into the second sorted material, wherein the recycled aggregate includes waste foundry sand, slag and porcelain drift, and the waste adsorbent includes anthracite and filter sand.

According to another suitable embodiment of the present invention, the solidifying agent comprises fly ash, lime and alumina.

According to another suitable embodiment of the present invention, the step of pulverizing and sorting further comprises separating materials having different diameters separately and pulverizing by hammer grinding or impact grinding according to the diameter.

The product manufactured by the manufacturing method according to the present invention can be used as a base material or a base material, and thus has the advantage of preventing natural damage caused by mining of sand. The manufacturing method according to the present invention has the advantage of improving the recycling efficiency of resources while preventing environmental pollution by using waste. In addition, the ground material according to the manufacturing method according to the present invention is characterized in reinforcing the foundation, thereby reducing cost and improving the stability of civil works. In addition, the manufacturing method according to the present invention has the advantage of being eco-friendly by preventing emission of environmental pollutants.

1 schematically shows an embodiment of a manufacturing process of a base material according to the present invention.
FIG. 2 shows an embodiment of a process in which waste absorbent material and recycled aggregate are made into recycled aggregate in the manufacturing method according to the present invention.
3 shows an embodiment of a process in which a base material is made from the recycled aggregate manufactured according to FIG. 2 in the manufacturing method according to the present invention.

In the following, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the embodiments are for a clear understanding of the present invention, and the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so if they are not necessary for the understanding of the invention, they will not be described repeatedly, and well-known components will be briefly described or omitted, but the present invention It should not be understood as being excluded from the embodiment of.

1 schematically shows an embodiment of a manufacturing process of a base material according to the present invention.

Referring to Figure 1, the manufacturing process of the base material according to the present invention comprises the steps of pulverizing and sorting while introducing recycled aggregate, waste absorbent and general cleaning sand (S12); Adjusting the particle size of the selected material (S13); Injecting a solidifying agent into the material whose particle size is adjusted and performing primary kneading (S14); Secondly selecting the kneaded material (S15); And a step (S16) of secondary kneading while adding a neutralizing agent to the secondly selected material, wherein the recycled aggregate includes waste foundry sand, slag and porcelain drift, and the waste adsorbent includes anthracite and filter yarn. .

The manufacturing method according to the present invention is to produce a base material by using mixed and recycled aggregates and general pulverized aggregates as auxiliary materials while using waste absorbent material including filter yarn, anthracite, and filter yarn, which are business wastes, as main materials. It is characterized. During the manufacturing process, a solidifying agent and a neutralizing agent may be added. Sand can be, for example, sand-like waste with a diameter of 0.4 to 5 mm, and Gravel can be gravel-like waste, for example, with a diameter of 5 to 30 mm. . In addition, anthracite can be a waste material in the form of particulates with a large amount of carbon and less ash. The waste absorbent material may be a waste material having a variety of diameters generated in the workplace, and the present invention is not limited to the examples presented. The base material prepared by the manufacturing method according to the present invention has a soil contamination degree that is harmless to the human body while allowing vegetation. In addition, the ground reinforcement base layer is formed while having good water permeability, so that the assembly degree of the assembly block can be reinforced. It will be described in detail below with respect to the manufacturing method of the base material according to the present invention having such characteristics.

The absorbent material including the waste refractory material may be supplied through, for example, a hopper, a belt transfer device, or a transfer conveyor together with a recycled aggregate and a general washing machine (S111, S112, S113). The recycled aggregate may be, for example, waste foundry sand, slag or porcelain drift, and the general cleaning sand may be such as sand, for example up to 0.08 mm in diameter. Waste absorbent material, recycled aggregate, and washing sand may be supplied in a fixed amount, for example, in a weight ratio of waste absorbent: recycled aggregate: washing sand = 30: 20 to 35: 15 to 25, but is not limited thereto.

During the transfer process, the iron component can be separated and stored separately, and it can be pulverized and sorted according to the diameter (S12). For example, waste sorbents containing waste refractories can be treated to have a diameter of 8 mm or less, and recycled aggregates can be 2.5 mm. Such control of the particle diameter is for uniform mixing and thus formation of stable compressive strength.

The crushed and sorted material may have a particle size adjusted again (S13). Particle size control means, for example, the weight ratio according to each diameter. For example, the proportion of those with a diameter of 6 to 8 mm, 4 to 6 mm, 2 to 4 mm, 1 to 2 mm, and 1 mm or less is for example 15 to 25 %, 25 to 40 %, 40 to 65% , 65~85% and 85~100%. Particle size control can be controlled, for example, using a sieve having a constant mesh or through a grinding process. The particle size can be adjusted in various ways, and the present invention is not limited to the presented embodiments.

When the particle size is adjusted, the first kneading process may be performed while the solidifying agent is added (S14). The solidifying agent may be, for example, fly ash, lime or alumina (Al ₂ O ₃ ), and may be added in a weight ratio of 10 to 20% of the total weight of the material. The first kneading process may be a low speed kneading process. For the low-speed kneading process, an apparatus such as a kneader may be used, and the kneader may mix materials while rotating at a speed of, for example, 5 to 20 RPM. Alternatively, the kneading process may proceed while being conveyed by a belt conveying device or a screw conveying device.

When materials having different particle sizes are mixed and solidified by the kneading process, a secondary screening process may be performed thereafter (S15). The secondary sorting process is for removing the material in the form of lumps or debris in the kneading process, and for example, a sieve of a certain mesh may be applied. When the secondary selection process is completed (S15), the secondary kneading process may be performed by adding a neutralizing agent (S16). The neutralizing agent may be, for example, magnesium or a pH adjusting agent and may include limestone, slaked lime, quicklime, carbide ash or mixtures thereof. The neutralizing agent may be added in an amount of 3 to 10% by weight based on the total material. The secondary kneading process can be carried out by an apparatus such as a kneader, for example, and the kneader can be rotated at a speed of 15 to 50 RPM, for example. Alternatively, it can be kneaded while being conveyed by a conveying belt or screw. The neutralizing agent may be in a liquid form and may be added in such a way that the liquid is sprayed onto the material during the transfer process. It can be kneaded in various ways, and the present invention is not limited to the examples presented.

When the secondary kneading process is completed (S16), the base material is made (S17) and may be packaged with a certain weight or stored in a storage warehouse. And the manufactured base material can be used as an interlocking block (interlocking) of a sidewalk or roadway, for example.

Another embodiment of the manufacturing process according to the present invention will be described.

2 shows an embodiment of a process in which waste absorbent material and recycled aggregate are made into recycled aggregate in the manufacturing method according to the present invention.

Referring to FIG. 2, a quantity of recycled aggregate including waste absorbent material, waste refractory material, waste casting sand, and porcelain drift may be supplied in a quantity (S21). Quantitative supply means, for example, that waste absorbents and recycled aggregates are supplied through different supply channels in the amount indicated above. The waste absorbent material and the recycled aggregate may be conveyed through, for example, a belt conveying device, and may be mixed with each other in the process of being conveyed (S22). The iron component may be removed from the mixed aggregate mixed with each other (S23). The removal of the iron component may be performed, for example, in an electromagnet de-ironing machine, and the removed iron component may be stored separately and regenerated (S231).

The mixed aggregate from which the iron component has been removed may be pulverized to a certain size in a crusher or a crusher, and may be crushed to have a diameter of 8 mm or less, for example. Crushing may be performed in an apparatus such as a jaw crusher, and the crushed mixed aggregate may be conveyed through a conveying means such as a belt conveying device (S24). The belt conveying device is used to separate particles of different diameters during conveying. A bucket conveying device may be installed at the end of the belt conveying device (S25), and may be separated according to the diameter of the mixed aggregate while passing through the first sorting device and the second sorting device in a tow way. (S271, S271). For example, mixed aggregates having a diameter of 2.5 mm or less and a diameter of 2.5 to 8 mm may be separated by a first sorting device and a second sorting device, respectively.

Separating the mixed aggregate so as to have different diameters is to apply different grinding methods depending on the diameter. For example, a mixed aggregate having a diameter of 2.5 mm or less may be hammer crushed (S281), and a mixed aggregate having a diameter of 2.5 mm to 8 mm or more may be impact crushed (S282). Hammer crushing refers to crushing while passing through a hammer vibrating at a certain period, and impact crushing refers to inserting the mixed aggregate into the crushing space and continuously applying an impact with a percussion device for a certain period of time. The pulverization according to the particle diameter of the mixed aggregate may be performed in various ways, and the present invention is not limited to the examples presented.

The mixed aggregate pulverized by different pulverization methods is transferred to each other and undergoes a sorting process (S271, S272), and such a process is repeated a number of times to produce a recycled aggregate having a required particle size. And the manufactured recycled aggregate can be kneaded with a general washing machine to make a base material.

3 shows an embodiment of a process in which a base material is made from the recycled aggregate manufactured according to FIG. 2 in the manufacturing method according to the present invention.

Referring to FIG. 3, the general washing sand (S311) and the recycled aggregate (S312) manufactured according to the method of FIG. 2 are, for example, recycled aggregate in a weight ratio: washing sand = 60: quantitative input in a ratio of 15 to 25 Can be. The recycled aggregate may for example have a diameter of 2.5 mm and 8 mm, and the cleaning yarn may have a diameter of, for example, 0.08 mm or less, but is not limited thereto.

The cleaning sand (S311) and the recycled aggregate (S312) are added together with the solidifying agent (S32), so that low-speed kneading may be performed (S33). Low-speed kneading can be carried out in an apparatus such as a screw or kneader, and the solidifying agent can be added in a weight ratio of 10 to 20% of the weight of the total material. If solidification proceeds through the low-speed kneading process, the material may be transferred through a transfer means such as bucket transfer afterwards (S34). And it can be high-speed kneading together with the injection of the liquid neutralizer (S35) (S36). The liquid neutralizing agent may be added, for example, in a weight ratio of 3 to 8% based on the total weight of the material. And the base material made through the high-speed kneading process can be stored in a storage such as a silo (Siro) (S37).

Various process processes can be applied to the manufacturing process according to the present invention, and the present invention is not limited to the presented embodiments.

Hereinafter, an embodiment of the manufacturing method according to the present invention will be described.

Example

Step 1: Recycled aggregate was prepared from 350 kg of filter sand, anthracite and filter sand, and 240 kg of waste casting and porcelain drift.

Step 2: A first kneading process was carried out by adding fly ash, lime and 120 kg of alumina while mixing 200 kg of washing sand with 600 kg of recycled aggregate.

Step 3: A second kneading process was performed by adding a mixture of 50 kg of limestone and carbide material to the material on which the first kneading process was completed to prepare a base material.

exam

The test results for the base material prepared according to the embodiment are presented in FIG. 4.

As can be seen from FIG. 4, it can be seen that the base material prepared by the manufacturing method according to the present invention has an absorption rate of 3% or less, a stability of 10% or less, and an absolute dry specific gravity of 2.5 or more. In addition, it can be seen that environmentally hazardous substances are not detected, so it is eco-friendly. Therefore, it can be seen that the base material produced by the manufacturing method according to the present invention can be used as a base material for sidewalks or roadways.

The product manufactured by the manufacturing method according to the present invention can be used as a base material or a base material, and thus has the advantage of preventing natural damage caused by mining of sand. The manufacturing method according to the present invention has the advantage of improving the recycling efficiency of resources while preventing environmental pollution by using waste. In addition, the ground material according to the manufacturing method according to the present invention is characterized in reinforcing the foundation, thereby reducing cost and improving the stability of civil works. In addition, the manufacturing method according to the present invention has the advantage that environmental pollutants are not released.

The present invention has been described in detail above with reference to the presented embodiments, but those of ordinary skill in this field will be able to make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. . The present invention is not limited by such modifications and variations of the invention, but is limited by the claims appended below.

S111: waste absorbent material S112: recycled aggregate
S113: General cleaning yarn S312: Recycled aggregate
S32: solidifying agent S35: liquid neutralizing agent spraying

Claims (1)

In the manufacturing method of the base material using the waste absorbent,
A step of removing iron components while being mixed while being supplied through a transfer conveyor of recycled aggregate, waste absorbent material and general cleaning material;
Step mixed aggregate the iron component is removed is that the each other by means of other grinding method grinding selected according to the diameter;
Adjusting the particle size of the selected material and first kneading by adding a solidifying agent;
Re-selecting the first kneaded material and performing secondary kneading while adding a neutralizing agent; And
Including the step of forming a base layer from the secondary kneaded material,
Recycled aggregate includes waste foundry sand, slag, and porcelain drift, and general cleaning sand becomes sand with a diameter of 0.08mm or less, and different grinding methods are hammer crushing for mixed aggregates with a diameter of 2.5 mm or less and mixing with a diameter of 2.5 mm or more. Impact crushing is performed on the aggregate, and the particle size control is to control the weight ratio according to the diameter, and the absorption rate of the base material is less than 3%, and the specific gravity becomes more than 2.5,
The first kneading is low-speed kneading by a kneader rotating at a speed of 5 to 20 RPM while a solidifying agent containing 10 to 20 wt% of fly ash, lime and alumina of the total weight of the material is added, and the second kneading A waste characterized by high-speed kneading by a kneader rotating at a speed of 15 to 50 RPM while spraying a liquid neutralizing agent containing 3 to 8 wt% of magnesium, limestone, slaked lime, quicklime, carbide or a mixture thereof Method for manufacturing a stratum base material using an adsorbent.

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