KR101240371B1 - Elasticity chip containing steelmakingslag and manufacturing method thereof - Google Patents

Abstract

The present invention is an environment-friendly steelmaking that can absorb harmful substances and purify the environment, including steelmaking slag, in particular, an atomized ball-type steelmaking slag, as an elastic chip used as a general elastic pavement material or artificial turffield filling material or a land track pavement material. The present invention relates to an elastic chip including slag and a method of manufacturing the same.
To this end, the elastic chip according to the present invention includes EPDM and steelmaking slag, and the steelmaking slag is in the form of atomized balls, and occupies 6.08 ± 0.15% by weight of the total weight of the elastic chip.
Therefore, by using steelmaking slag as an auxiliary material of the elastic chip, it is possible to increase the utilization of resources and to reduce the production cost of the elastic chip, and to reduce the concern about the dissolution of harmful components such as heavy metal from the installation or use surface of the elastic chip.
In addition, through the atomized ball-type steelmaking slag that plays a role as a filter medium, that is, the PS ball can be expected to environmental protection by removing the adsorption or organic matter of the area where the elastic chip according to the present invention is installed.

Description

Elastic chip including steelmaking slag and manufacturing method thereof {ELASTICITY CHIP CONTAINING STEELMAKINGSLAG AND MANUFACTURING METHOD THEREOF}

The present invention relates to an elastic chip including steelmaking slag and a method of manufacturing the same. More specifically, it is an elastic chip used as a general elastic pavement material or artificial turf field filling material or a land track pavement material, such as steelmaking slag, especially an atomized steelmaking slag, which absorbs harmful substances and cleans the environment. The present invention relates to an elastic chip including steelmaking slag and a method of manufacturing the same.

Elastic chips include urethane chips, regenerated urethane chips, and EPDM chips. Recently, EPDM chips have been spotlighted for their superior materials and construction cost.

EPDM is named after Ethylene Propylene Diene Mixture and is a synthetic rubber composed of ethylene and propylene.

It starts from ethylene propylene rubber, and ethylene propylene rubber (EPR) is an amorphous polymer obtained by hybridizing ethylene and propylene. For example, when butyl and aluminum vanadium tetrachloride are used as catalysts in the heptane solution, ethylene and propylene are reacted at −50 ° C. to give a rubbery polymer. Since this polymer has a small double bond and cannot be vulcanized and difficult to mold, a terpolymer containing a large number of double bonds when a third component such as dicyclopentadiene is added to the three-way hybrid polymerization is used. Substance), which is called EPDM. EPDM is chemically stable, and the vulcanized material exhibits intermediate properties between natural rubber and SBR. The rubber properties are further enhanced by enhancing rubber properties, and are excellent in flexibility, heat resistance, cold resistance, ozone resistance, and solvent resistance. It is also excellent in expressing various colors and is widely used as a material for elastic packaging materials.

On the other hand, in the current situation of increasing interest in the disposal of steelmaking slag that is increasing as industrial waste, it has been sought to utilize it as a building material. Various alternatives have been proposed for the use of such steelmaking slag. In particular, the results obtained in the form of balls by atomizing the steelmaking slag are known as the use of PS (Precious Slag) balls.

As these PS ball _{2CaO · Fe 2 O 3, 2CaO} · SiO 2, MgO · Al 2 O 3, MgO · Cr 2 O 3 to be in the steel-making slag in the steel mill as the raw material produced by the SAT {Slag Atomizing Technology} method It shows the spinel structure of the same compound, there are few Fe- ₂ O ₃ , CaO, etc. are in a bonded state, there is almost no free-CaO, the surface is stabilized glassy, hard, smooth, strong weathering resistance, wear resistance It shows the characteristics that can be used for various purposes.

Therefore, steelmaking slag is a new building material that can be utilized as a material that improves physical performance, excellent physical performance compared to existing fine aggregates, and certified pollution-free materials as a mixed material that is a substitute material for valuable materials, sand and similar aggregates.

In addition, steelmaking slag is an industrial waste in the process of refining steelmaking raw materials such as pig iron and scrap metal, and has the advantage of recycling the waste and is essentially lighter than iron because it is separated by specific gravity. It is a substance.

In addition, the atomized steel-making slag, also known as PS ball, contains a large amount of Fe ₂ O ₃ as a filter medium, which is optimal for adsorption of harmful substances such as arsenic, and has a high removal rate of organic substances, which is sufficient for use in environmental purification. .

The present invention has been devised in view of the above situation, steelmaking slag includes steelmaking slag that can utilize the waste in the production of elastic chips to increase the utilization of resources and use environmentally friendly materials to perform the role of environmental purification. An object of the present invention is to provide an elastic chip and a method of manufacturing the same.

In order to achieve the above object, the present invention provides an elastic chip including EPDM and steelmaking slag.

In addition, the elastic chip includes EPDM, reinforcing filler, dispersing agent, softener, mixing accelerator, vulcanizing agent, vulcanization accelerator, colorant and steelmaking slag.

In addition, the steelmaking slag is in the form of an atomized ball, and occupies 6.08 ± 0.15% by weight relative to the total weight of the elastic chip.

In addition, the present invention a) preparing a raw material EPDM and auxiliary materials reinforcing fillers, dispersants, softeners, mixing accelerators, vulcanizing agents, vulcanization accelerators, colorants and steelmaking slag; b) mixing and kneading the EPDM, the dispersing agent, the mixing accelerator, the coloring agent, the steelmaking slag and the reinforcing filler, and 1/2% by weight of the softener to form a primary kneading mixture. ; c) adding and kneading 1/2 wt% of the reinforcing filler and 1/2 wt% of the softener to the primary kneading mixture to produce a second kneading mixture; d) adding a vulcanizing agent and a vulcanization accelerator to the secondary kneading mixture to produce a tertiary kneading mixture; e) pressing and vulcanizing the tertiary kneaded mixture at a pressure of 100 kg / cm ² for 10 minutes at 160 ° C. to produce vulcanized rubber; And f) cooling and pulverizing the vulcanized rubber.

In addition, the step b) is 30 ± 0.15% by weight of EPDM, 5 ± 0.15% by weight of dispersant, 1.8 ± 0.15% by weight of mixing accelerator, 0.22 ± 0.15% by weight of colorant steel slag 6.08 ± 0.15% by weight, 25 ± 0.15% by weight of reinforcing filler and 2.5 ± 0.15% by weight of softener, and c) is added to 25 ± 0.15% by weight of reinforcing filler and 2.5 ± 0.15% by weight of softener relative to the total weight of the elastic chip. ) Step is 0.75 ± 0.15% by weight of the vulcanizing agent, 1.15 ± 0.15% by weight relative to the total weight of the elastic chip.

In addition, the steps b) and c) are kneaded for 3 minutes, the d) is kneaded for 20 seconds, and the aging is performed for 18 hours or more and 20 hours or less.

The elastic chip including the steelmaking slag according to the present invention and a manufacturing method thereof have the effect of increasing the utilization of resources and lowering the production cost of the elastic chip by using the steelmaking slag as waste as an auxiliary material of the elastic chip.

In addition, the elastic chip according to the present invention can reduce the concern about the dissolution of harmful components such as heavy metal from the installation or use surface of the elastic chip using environmentally friendly atomized steelmaking slag.

In addition, through the atomized ball-type steelmaking slag that plays a role as a filter medium, that is, the PS ball can be expected to environmental protection by removing the adsorption or organic matter of the area where the elastic chip according to the present invention is installed.

1 is a manufacturing process flow chart illustrating a method for manufacturing an elastic chip including a steelmaking slag according to the present invention.

Hereinafter, a preferred embodiment of an elastic chip including a steelmaking slag according to the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

First, the elastic chip including the steelmaking slag according to the present invention is an elastic chip used as a general elastic pavement material or artificial turffield filling material or track track pavement material, such as steelmaking slag, in particular, atomized ball-type steelmaking slag adsorbs harmful substances. And clean the environment, including EPDM and steelmaking slag.

More specifically, EPDM, reinforcing filler, dispersing agent, softening agent, mixing accelerator, vulcanizing agent, vulcanization accelerator, coloring agent and steelmaking slag are mixed and kneaded, refined, rolled, aged, and vulcanized as in the following manufacturing method. Grind to form a chip.

Here, EPDM refers to synthetic rubber as the raw material of elastic chips, bicarbonate (CaCo ₃ ) as a reinforcing filler, PEG as a dispersant, P-Oil as a softening agent, zincation and ST / A as a accelerator, sulfur as a vulcanizing agent, It is preferable to use ACC-TT and ACC-BZ and ACC-DM as vulcanization accelerators, green balls as colorants, atomized balls as steelmaking slags, that is, PS balls.

Looking at each of them in detail as follows.

EPDM as a raw material refers to a synthetic rubber composed of ethylene and propylene, as described above. It is chemically stable and can be used up to 150 degrees of heat resistance, chemical resistance, weather resistance, cold resistance, hardness of 40 degrees, and specific gravity of 0.9 or less.

In addition, the pigment stability is good and the single compounding is excellent even if the filler and reinforcing agent up to 200% in the rubber raw material is excellent in the down-processing, and as a softener, blue fin-based oil is used. It is preferable to maintain vulcanization vulcanization temperature about 160 degree | times.

Preferred filler for reinforcing fillers is white coal, which is a kind of calcium carbonate (CaCO3). Pure raw material rubber, synthetic rubber, and natural rubber are pure rubber, and the turmeric body has only 50kg / ㎠ or less in tensile, tear, strength and hardness. Thereby improving all physical properties through the reinforcing filler,

Polyethyleneglycol (PEG), which is a preferred dispersant, is a polymer of ethylene oxide and is commonly used as a transparent solid or white solid, which is mixed to obtain the desired appearance, viscosity and melting point of the product. Generally, polyethyleneglycol is used as a solvent for rubber, resin, and synthetic fibers, and it is possible to disperse a material that is insoluble in water with water solubility.

Process oil (P-Oil), which is preferable as a softener, is a product made by refining petroleum crude oil, and is broadly classified into saturated hydrocarbons of paraffin, naphthene ring, and unsaturated hydrocarbons of aromatic ring. Paraffins, naphthenes, and aromatics contained in) 中 are classified into paraffinic, naphthene, and aromatic based on the composition of hydrocarbons.

These process oils have different effects on compatibility with various rubbers, rubber processability, low temperature properties of product rubber, anti-pollution, aging resistance, elasticity, and wear resistance. Aromatic, naphthene, paraffin.

Preferred zinc oxide (Zno) as a mixing accelerator is a light white powder with a compound of oxygen and zinc as zinc oxide and is called zinc white. It is a light white powder with melting point of 1,975 ° C (pressurization) and 1,720 ° C (atmospheric pressure), specific gravity of 5.47 (amorphous), and 5.78 (crystalline). When heated to about 300 ℃, it turns yellow, but when cooled, it is an amphoteric oxide that is almost insoluble in water but insoluble in dilute acid and concentrated alkali.It reacts with stearic acid, which will be described later, to form Zn-Stearate, which acts as an accelerator. Its active action, can be used as an inorganic pigment for ancillary purposes.

In addition, ST / A, which is preferable as a mixing accelerator, represents stearic acid, which acts as an acid vulcanization accelerator.

Such ST / A works as a basic material and also as a dispersant.

Sulfur is preferably used as a vulcanizing agent.

Here, vulcanization refers to an operation that changes the elasticity by applying sulfur to raw rubber and heats it, but today it expands its meaning to collectively change plastics, that is, plastic materials, into elastic materials. It is a process to strengthen the bond between rubber molecules by adding the agent and to increase the elasticity, tensile strength and the like. However, in addition to this work, it refers to a series of works that increase the mechanical strength by inducing covalent bonding of rubber molecules. Non-sulfur vulcanization using peroxides and metal oxides, radiation vulcanization and the like.

The biggest feature of the vulcanized rubber is that the elasticity is increased, aging is slow, and there is an advantage that the volume change is not large even when deformed.

Sulfur is preferably used as a vulcanizing agent, but selenium, tellurium, sulfur chloride, turamsulfide, and the like can also be used for special vulcanization purposes.

Vulcanization accelerators increase the elasticity of rubber by adding vulcanizing agents such as sulfur to rubber to form a crosslinked structure between rubber molecules.In this case, the vulcanization time is shortened, the vulcanization temperature is lowered, the amount of sulfur is reduced, and the quality of the vulcanized rubber is increased. Addition for the purpose of improvement is preferably ACC-TT, ACC-BZ, ACC-DM.

The ACC-TT refers to the ACCELERATORS-TETRAMETHYL THIURAM DISULFIDE and has a wide range of use as an accelerator. Critical temperature is 100-120 ℃ which is effective at vulcanization, is used as activator of all kinds of products, and is suitable for low temperature vulcanization.

The ACC-BZ refers to the ACCELERATORS-ZINC DI-N-BUTYL DITHIOCARBAMATE and has a strong acceleration and can be vulcanized at room temperature. It is also effective as a non-polluting rubber adhesive and non-pollution stabilizer of rubber cement.

The ACC-DM refers to the ACCELERATORS-DIBENZOTHIAZYL DISULFIDE, which has a high temperature (130 ° C.), and is preferably used in combination with a basic accelerator to prevent initial vulcanization and stabilize vulcanization.

As a coloring agent, you may use the green thing or the coloring agent which expresses yellow.

As steelmaking slag, it is preferable to use PS balls in the form of atomized balls, which, in addition to those described above, may be provided as a method of quenching molten steelmaking slag using high-speed air. The steelmaking slag produced is also called Atomizing Steel Slag (ASS) because it is spherical in ball form. Such atomized steelmaking slag, ie, PS ball, has a low risk of expansion and collapse due to free calcium oxide, and has a granular form close to spherical shape and good adsorption.

In addition, the PS ball has excellent removal rate of harmful substances, removes color, has the effect of removing nutrients, the media is spherical, uniform, and has high strength, so it has a long service life and 40% more water flow than sand. SS) and turbidity are excellent.

Therefore, if the use surface is packaged using an elastic chip including the steelmaking slag, in particular, rainwater and sewage can be purified to reduce the damage of environmental pollution, and the steelmaking slag itself is also environmentally friendly. It is harmless to human body as material.

Such a compounding ratio of the materials included in the elastic chip according to the present invention is as follows.

EPDM 30 ± 0.15% by weight, reinforcing filler 50 ± 0.15% by weight, dispersant 5 ± 0.15% by weight, softener 5 ± 0.15% by weight, mixing accelerator 1.8 ± 0.15% by weight, vulcanizing agent 0.75 ± 0.15% by weight %, Vulcanization accelerator 1.15 ± 0.15 wt%, colorant 0.22 ± 0.15 wt%, steelmaking slag 6.08 ± 0.15 wt%.

Hereinafter, a method of manufacturing an elastic chip according to the present invention will be described.

First, raw materials EPDM and auxiliary materials, reinforcing fillers, dispersants, softeners, mixing accelerators, vulcanizing agents, vulcanization accelerators, colorants, and steelmaking slag are prepared.

This is a step for preparing raw materials and subsidiary materials required for the production of the product by cutting and weighing the raw materials and subsidiary materials in a designed size and weight by a compounding design table.

Here, EPDM is prepared as a raw material, bicarbonate (CaCo ₃ ) as an auxiliary reinforcing filler, PEG as a dispersing agent, P-Oil as a softening agent, zincation and ST / A as a mixing accelerator, SUL as a vulcanizing agent, and ACC-TT as a vulcanization accelerator. ACC-BZ, ACC-DM, green colorant and steel ball slag are atomized, i.e., PS balls are prepared, respectively.

Next, the EPDM, the dispersant, the mixing accelerator, the coloring agent, the steelmaking slag, the reinforcing filler, and the softener are combined and kneaded to produce a primary kneading mixture.

In this case, the kneading is a rubber, that is, it is not enough that only the mixed powder is added to the EPDM, and includes a mixing process for sufficiently dispersing the mixed powder in the EPDM. Thus, kneading is fundamentally different from mixing.

Since the superiority of the kneading operation has a significant effect on the properties of the vulcanized rubber compound, it is necessary to pay close attention to the order of mixing, mixing time, temperature, etc. The manufacturing method of the elastic chip according to the present invention is divided into three steps as described below. The kneading process is completed and the required amount of compound is added at a predetermined ratio.

First, in the s220 step of producing the first kneading mixture as the first kneading process, the EPDM, the dispersant, the mixing accelerator, the coloring agent, the steelmaking slag, the reinforcing filler, and the softener are mixed and added to the kneader. Knead for 3 minutes.

At this time, EPDM 30 ± 0.15% by weight, dispersant 5 ± 0.15% by weight, mixing accelerator 1.8 ± 0.15% by weight, colorant 0.22 ± 0.15% by weight steelmaking slag 6.08 ± 0.15% by weight, reinforcing filler 25 ± 0.15% by weight %, Softener 2.5 ± 0.15% by weight, and kneader preferably Kneaker 75L class.

Next, the reinforcing filler and the softener are added to the primary kneading mixture and kneaded to produce a secondary kneading mixture.

This is a secondary kneading process, and the reinforcing filler and the softener are added to the primary kneading mixture produced from the first kneading process and kneaded for 3 minutes.

At this time, the reinforcing filler and the softener are added in half in the first kneading process and the second kneading process by adding 25 ± 0.15% by weight of reinforcing filler and 2.5 ± 0.15% by weight of softener to the total weight of the elastic chip. Compounded.

Next, the vulcanizing agent and the vulcanization accelerator are put into the secondary kneading mixture and kneaded to produce a tertiary kneading mixture. (S240)

This is, as a third kneading process, the vulcanizing agent and the vulcanization accelerator are added to the secondary kneading mixture generated from the second kneading process and kneaded for 20 seconds.

At this time, 0.75 ± 0.15% by weight of the vulcanizing agent, 1.15 ± 0.15% by weight of the vulcanization accelerator relative to the total weight of the elastic chip.

In this way, the raw materials and subsidiary materials are blended and kneaded in a predetermined order and ratio during the first to third kneading processes.

Next, after the third kneaded mixture is refined, rolled, and aged, press-vulcanized at a pressure of 100 kg / cm ² for 10 minutes at 160 ° C. to produce vulcanized rubber. (S250)

Here, the refining is to mix the finished kneading work, that is, the third kneading blend to the roller to lower the mixing material to mix evenly, and apply a mechanical shear force on a rubber open roller or a closed roller to apply a constant acceleration. It is a task to equally mix various kinds of compounding agent in the down rubber that has been made to have a significant influence on the properties of the vulcanized rubber compound.

At this time, the roller is preferably 18 inches in diameter.

In addition, the rolling is to press the discharged rubber to the size of 1200mm long, 400mm wide, 10mm thick, preferably rolled with a calender (roller) to cut the sheet into a desired shape.

The roller is preferably a 6 inch diameter roller.

Then, the aging is to mature the rubber rolled in the sheet form as described above 18 hours or more and 20 hours or less at room temperature, and the cutting is to cut the aged rubber to a predetermined size to meet the specifications.

After the process of refining, rolling, aging and cutting, the cut rubber is vulcanized by a hydraulic press at a pressure of 100 kg / cm ² for 10 minutes at a temperature of 160 ° C.

At this time, preferably a hydraulic press boiler is used.

Here, the vulcanization process is a process in which sulfur causes a bridging reaction with a polymer called polyisoprene, and the rubber has rubbery elasticity and chemical resistance by vulcanization.

Next, the vulcanized rubber is cooled and pulverized. (S260)

This is a process of air-cooling the vulcanized rubber and pulverizing the cooled rubber using a grinder to discharge the final product.

Then, the crushed rubber is selected to the sorting net installed in the vibrating sieve according to the specification, and the particles passed through the sorting net are preferably packed in 25Kg each and shipped.

The above description is only a preferred embodiment of the present invention, and there may be various modifications. However, if these modifications are included in the technical spirit of the present invention will be within the scope of the present invention, the scope of the present invention can be easily understood by those skilled in the art through the following claims.

Claims (5)

In an elastic chip comprising EPDM and steelmaking slag,
The steelmaking slag is in the form of an atomized ball, the elastic chip comprising a steelmaking slag occupies 6.08 ± 0.15% by weight relative to the total weight of the elastic chip.
delete a) preparing EPDM and auxiliary reinforcing fillers, dispersing agents, softeners, mixing accelerators, vulcanizing agents, vulcanization accelerators, colorants and steelmaking slag;
b) blending and kneading the EPDM, the dispersant, the mixing accelerator, the coloring agent, the steelmaking slag, the reinforcing filler, and the softener to produce a primary kneading mixture;
c) adding the reinforcing filler and the softener to the primary kneading mixture and kneading to produce a secondary kneading mixture;
d) adding a vulcanizing agent and a vulcanization accelerator to the secondary kneading mixture to produce a tertiary kneading mixture;
e) pressing and vulcanizing the tertiary kneaded mixture at a pressure of 100 kg / cm ² for 10 minutes at 160 ° C. to produce vulcanized rubber; And
f) cooling and pulverizing the vulcanized rubber.
The method according to claim 3,
Step b) is 30 ± 0.15% by weight of EPDM, 5 ± 0.15% by weight of dispersant, 1.8 ± 0.15% by weight of mixing accelerator, 0.22 ± 0.15% by weight of colorant steel slag 6.08 ± 0.15% by weight, reinforcing filler 25 ± 0.15% by weight, softener 2.5 ± 0.15% by weight,
In step c), 25 ± 0.15% by weight of reinforcing filler and 2.5 ± 0.15% by weight of softener are added to the total weight of the elastic chip,
The step d) is a method of manufacturing an elastic chip containing 0.75 ± 0.15% by weight, vulcanization accelerator 1.15 ± 0.15% by weight relative to the total weight of the elastic chip.
The method according to claim 3,
Steps b) and c) are kneaded for 3 minutes, step d) is kneaded for 20 seconds,
The ripening process of the elastic chip to proceed 18 hours to 20 hours or less.

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