KR20190099179A - Method of Producing Substitute for Ground Material of Base Course from Waste Adsorbents - Google Patents

Abstract

The present invention relates to a method of manufacturing base floor material or a base floor material substitute using wasted adsorbents generated from various manufacturing plants or business sites and, more specifically, to a method of manufacturing base floor material using wasted adsorbents, for producing an eco-friendly base floor material with excellent water permeability by adding washed sand to recycled aggregates containing wasted adsorbents. In particular, the method of manufacturing base floor material comprises the steps of: feeding, grinding, and sorting recycled aggregates, wasted adsorbents, and regular washed sand; controlling particle sizes of the sorted material; conducting a first blending of the material with controlled particle sizes while adding a solidifying agent thereto; sorting the blended material for a second time; and conducting a second blending of the material sorted for the second time while adding a neutralizer thereto, wherein the recycled aggregates include waste foundry sand, slags, and ceramic wastes, and the wasted adsorbents include anthracite and filtered sand.

Description

Method for Producing Substrate Substitutes Using Waste Adsorbents {Method of Producing Substitute for Ground Material of Base Course from Waste Adsorbents}

The present invention relates to a method for producing a base ground material or a donated ground substitute material using waste adsorbents generated at various production plants or workplaces, and specifically, by adding a washing sand to the recycled aggregate including waste adsorbents, it is environmentally friendly and permeable. The present invention relates to a method for preparing a base material using waste adsorbents for producing an excellent base material.

In general, the base layer is located on the upper subgrade in an asphalt pavement and has a function of uniformly transmitting loads acting on the surface to the subgrade. Substrate ground material refers to a material for forming such a base layer, and generally an assembly drawing or an asphalt mixture may be used. Auxiliary bases can be formed on roadbeds or subgrades for civil works, and bases can be formed on auxiliary bases, such as by-product lime (dreg), ascon, waste ascon or waste-concrete.

As a prior art related to the base material there is a 'base material for the playground' No. 2005-0028148. The prior art is a base material having a blind pit for drainage of groundwater and infiltration water, an frostbite prevention layer to prevent the ground of the playground from freezing in winter, and an auxiliary base of gravel installed on the upper surface of the frostbite prevention layer, A substrate structure having a buffer and drainage layer provided on an upper surface of an auxiliary substrate is disclosed.

Another prior art related to the base material is Patent Registration No. 0710514, “A method for selecting recycled aggregates for road auxiliary base materials, and a road auxiliary base material using recycled aggregates selected by the same”. The prior art discloses road assistance substrates recycled from waste-concrete, flammable waste, recycled aggregates, inorganic purified sludge, waste-cast sand and stone sludge.

Substrate substrates must meet specified criteria for compressive strength, permeability, and salt content, for example lead (Pb), copper (Cu), arsenic (As), mercury (Hg), cadmium (Cd), or chromium (Cr). It should not contain hazardous substances such as In addition, the material used as the base ground material should not be depleted, it is advantageous that it is renewable and can be produced at low cost.

The prior art does not disclose a substrate ground substrate or substrate ground substitute having such conditions.

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

Prior Document 1: Publication No. 10-2005-0028148 (Antuca Co., Ltd., published on March 22, 2005) Prior Document 2: Registered Patent No. 0710514 (Ingwang Environment Co., Ltd., published April 16, 2007) A method for screening recycled aggregates for road auxiliary base materials and a road auxiliary base material using the selected recycled aggregates

An object of the present invention is to provide a method for producing a base ground material using environmentally friendly waste adsorbents while meeting the standard.

According to a preferred embodiment of the present invention, the method for producing a base ground material using the waste adsorbent is pulverized by sorting while inputting recycled aggregate, waste adsorbent and general washing sand; Adjusting the particle size of the selected material; Performing primary kneading while adding a solidifying agent to the particle size-controlled material; Sorting the kneaded material into a second step; And secondary kneading while introducing a neutralizing agent into the secondary sorted material, wherein the recycled aggregate includes waste foundry sand, slag and porcelain drift, and the waste adsorbent includes anthracite and filtered sand.

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

According to another suitable embodiment of the present invention, the pulverizing and screening may further include separately separating materials having different diameters and pulverizing by hammer crushing or impact crushing according to the diameters.

The product produced by the manufacturing method according to the present invention can be used as a base material or a base material has the advantage that the natural damage due to the mining of sand is prevented. The manufacturing method according to the present invention has the advantage that the recycling efficiency of the resources is improved while preventing environmental pollution by using waste. In addition, the ground material by the manufacturing method according to the present invention is characterized in that the reinforcement of the base and thereby has the advantage that it is possible to reduce the cost while improving the stability of civil engineering. In addition, the manufacturing method according to the present invention has the advantage of being environmentally friendly by not emitting environmental pollutants.

Figure 1 schematically shows an embodiment of the manufacturing process of the base ground material according to the present invention.
Figure 2 shows an embodiment of a process in which the waste adsorbent and recycled aggregate is made of recycled aggregate in the manufacturing method according to the present invention.
Figure 3 shows an embodiment of a process in which the base ground material is made from the recycled aggregate prepared according to Figure 2 in the manufacturing method according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the embodiments set forth in the accompanying drawings, but the embodiments are provided for clarity of understanding and the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, and thus are not repeatedly described unless necessary for understanding of the invention, and well-known components are briefly described or omitted. It should not be understood to be excluded from the embodiment of.

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

Referring to Figure 1, the manufacturing process of the base ground material according to the present invention comprises the steps of crushing and sorting while inputting recycled aggregate, waste adsorbent and general washing sand (S12); Adjusting the particle size of the selected material (S13); Performing primary kneading while adding a solidifying agent to the material whose particle size is controlled (S14); Sorting the kneaded material into secondary (S15); And performing a second kneading while adding a neutralizing agent to the secondary sorted material (S16), wherein the recycled aggregate includes waste foundry sand, slag and porcelain drift, and the waste adsorbent includes anthracite and filtered sand. .

The manufacturing method according to the present invention is to prepare a base material by using mixed recycled aggregate and general crushed aggregate as auxiliary material while using waste adsorbent including filtered sand, anthracite, and filtered sari as the main material for workplace waste. It features. Solidifying and neutralizing agents can be added during the preparation. Sand may be, for example, sand-like waste with a diameter of 0.4 to 5 mm and Gravel may be, for example, gravel-like workplace waste with a diameter of 5 to 30 mm. . Anthracite can also be a waste product in the form of fine ash and low ash content. Waste adsorbent may be a waste having a variety of diameters generated in the workplace and the present invention is not limited to the embodiments shown. Substrate base material produced by the manufacturing method according to the invention has a soil pollution degree that is harmless to the human body while allowing vegetation. And it is possible to strengthen the assembly degree of the assembly block by forming a ground reinforcement base having a good permeability. It will be described below in detail with respect to the manufacturing method of the base ground material according to the invention having such characteristics.

The adsorbent material including waste refractory material may be supplied together with recycled aggregates and general cleaning yarns, for example, through a hopper, a belt conveying device or a conveying conveyor (S111, S112, S113). The recycled aggregate may be, for example, waste foundry sand, slag or pottery drift, and the general cleaner may be, for example, sand, having a diameter of 0.08 mm or less. Waste adsorbents, recycled aggregates, and scrubbing sand may be supplied in defined amounts and may be, for example, but not limited to, waste adsorbents: recycled aggregates: wash sand = 30: 20-35: 15-25 in weight ratio.

In the transport process, the iron component is separated and can be stored separately and can be sorted according to the diameter of the grinding (S12). For example, a waste adsorbent comprising waste refractory can be treated to have a diameter of 8 mm or less and the recycled aggregate can be 2.5 mm. This adjustment of the particle diameter is for the formation of uniform mixing and hence stable compressive strength.

The material that has been pulverized and sorted can be adjusted again in size (S13). Particle size control means, for example, the weight ratio according to each diameter. For example, the ratios of the diameters of 6 to 8 mm, 4 to 6 mm, 2 to 4 mm, 1 to 2 mm and 1 mm or less are, for example, 15 to 25%, 25 to 40%, and 40 to 65%. , 65 ~ 85% and 85 ~ 100%. Particle size control can be controlled, for example, using a sieve with 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 adding a solidifying agent (S14). The hardening agent may be, for example, fly ash, lime or alumina (Al ₂ O ₃ ) and may be added at a weight ratio of 10 to 20% of the total material weight. The primary kneading process may be a low speed kneading process. For example, a kneader may be used for the slow kneading process and the kneader may mix the material while rotating at a speed of, for example, 5 to 20 RPM. Alternatively, the kneading process can be carried out while being conveyed by a belt conveying apparatus or a screw conveying apparatus.

When the materials having different particle sizes are solidified while being mixed by the kneading process, a secondary sorting process may be performed thereafter (S15). The secondary sorting process is to remove the material in the form of lumps or debris in the kneading process, for example, a sieve of a certain mesh may be applied. When the secondary screening process is completed (S15), the secondary kneading process by the addition of the neutralizing agent may proceed (S16). The neutralizing agent may be, for example, such as magnesium or pH adjusting agent and may include limestone, slaked lime, quicklime, carbide ash or mixtures thereof. The neutralizing agent may be added in 3 to 10% by weight of the total material. The secondary kneading process can be carried out by an apparatus such as, for example, a kneader and for example the kneader can be rotated at a speed of 15 to 50 RPM. Alternatively, it can be kneaded while being conveyed by a transfer belt or screw. The neutralizer may be in 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 embodiments shown.

Upon completion of the second kneading process (S16), the base ground material is made (S17) and may be packed with a constant weight or stored in a storage warehouse. Substrate ground material thus manufactured can be used, for example, as interlocking in sidewalks or driveways.

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

Figure 2 shows an embodiment of a process in which the waste adsorbent and recycled aggregate is made of recycled aggregate in the manufacturing method according to the present invention.

Referring to Figure 2, the recycled aggregate, including waste adsorbents and waste refractories, waste foundry sand and porcelain drift may be a quantitative supply (S21). Quantitative supply means, for example, that the sorbent and recycled aggregates are supplied through different supply channels in the amounts given above. Waste adsorbents and recycled aggregates can be conveyed through, for example, a belt conveying device and can be mixed with one another during the conveying process (S22). Iron components may be removed from the mixed aggregate mixed with each other (S23). For example, the removal of the iron component may be performed in an electromagnet degasser and the removed iron component may be separately stored 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 pulverizer, for example, to have a diameter of 8 mm or less. The grinding can be carried out in an apparatus such as a jaw crusher, for example, and the mixed aggregate which has been crushed can be transferred, for example, via a conveying means such as a belt conveying apparatus (S24). The belt conveying device is used for the separation of particles of different diameters in the conveying process. 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, the mixed aggregate between 2.5 mm or less in diameter and 2.5 to 8 mm in diameter may be separated by the first sorting device and the second sorting device, respectively.

Separating the mixed aggregate 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 a hammer mill (S281) and a mixed aggregate having a diameter of 2.5 mm to 8 mm or more may be an impact mill (S282). Hammer pulverization refers to the pulverization while passing a vibrating hammer at a predetermined cycle, and impact pulverization refers to the impact of the mixed aggregate into the pulverization space and continue to impact the paddle for a predetermined time. Grinding according to the particle diameter of the mixed aggregate can be made in various ways and the invention is not limited to the examples presented.

The mixed aggregates pulverized by different grinding methods are respectively transferred and subjected to a sorting process (S271, S272), and this process may be repeated a plurality of times to produce recycled aggregates having a required particle size. And the recycled aggregate is manufactured can be kneaded together with the general cleaner to be made into a base ground material.

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

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

Washing yarn (S311) and the recycled aggregate (S312) is put together with the hardener (S32) can be a low-speed kneading (S33). Slow kneading can be carried out in an apparatus such as, for example, a screw or a kneader and the solidifying agent can be added at a weight ratio of 10 to 20% of the weight of the total material. When the solidification proceeds through the low speed kneading process, the material may be transferred through a transfer means such as a bucket transfer (S34). And it can be a high speed kneading with the injection of the liquid neutralizer (S35) (S36). The liquid neutralizer can be added, for example, in a weight ratio of 3 to 8% by weight of the total weight of the material. Substrate ground material made through a high-speed kneading process may be stored in a storage such as silo (S37).

Various processing procedures 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: A recycled aggregate was prepared from 350 kg of filtration sand, anthracite and filtration sand and 240 kg of waste castings and porcelain drift.

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

Step 3: Substrate kneading was carried out by adding 50 kg of limestone and a mixture of carbide ash to the material on which the first kneading process was completed to prepare a base ground material.

exam

Test results for the base substrate prepared according to the embodiment is shown in FIG. 4.

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

The product produced by the manufacturing method according to the present invention can be used as a base material or a base material has the advantage that the natural damage due to the mining of sand is prevented. The manufacturing method according to the present invention has the advantage that the recycling efficiency of the resources is improved while preventing the environmental pollution by using waste. In addition, the ground material by the manufacturing method according to the present invention is characterized in that the reinforcement of the base and thereby has the advantage that it is possible to reduce the cost while improving the stability of civil engineering. In addition, the manufacturing method according to the present invention has the advantage that no environmental pollutants are released.

Although the present invention has been described in detail above with reference to the presented embodiments, those skilled in the art may make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. . The invention is not limited by the invention as such variations and modifications but only by the claims appended hereto.

S111: waste adsorbent S112: recycled aggregate
S113: general cleaner S312: recycled aggregate
S32: solidifying agent S35: liquid neutralizing material injection

Claims (1)

In the manufacturing method of the base ground material using the waste adsorbent,
Recycling aggregate, waste adsorbents and general cleaners are fed through a conveyer while being mixed to remove the iron component;
A step in which the mixed aggregate from which the iron component is removed is pulverized by different grinding methods according to the diameter;
Adjusting the particle size of the selected material and subjecting the solidifying agent to primary kneading;
Re-selecting the first kneaded material and performing secondary kneading while inputting neutralization; And
Forming a stratified base material from the second kneaded material,
The recycled aggregate includes waste foundry sand, slag and ceramic drift, and different grinding methods are hammer crushing and impact crushing, and the specific gravity is 2.5 or more while the absorption rate of the layered foundation is 3% or less. Method for producing strata-based materials.

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