KR100523478B1 - Playground Material Using Red Mud and Pozzolana minerals and Its Preparation Method - Google Patents

Abstract

Neutralize the red mud, a by-product obtained from Bayer Process, with a neutralizing solution of iron sulphate, and dry it to produce a red artificial earth, which is then mixed with pozzola ore powder, a kind of stone, to form a tennis court surface or other material. Disclosed is a method for producing a playground surface material. The present invention neutralizes the red mud generated as a by-product from the industry with iron sulfate, another industrial by-product, and after drying it, mixes the red artificial earth obtained here with a pozzolanic mineral powder showing a red color to play tennis court surface material or other playground surface material. It is about the manufacturing method.

Description

Surface material using red mud and pozzolan mineral powder and its preparation method {Playground Material Using Red Mud and Pozzolana minerals and Its Preparation Method}

The present invention neutralizes the red mud, a by-product obtained from the Bayer Process, a process of manufacturing aluminum hydroxide, with iron sulfate solution as a neutralizer, and then dried it to produce a red artificial earth, which is mixed with a powder of aka pozzola ore powder. It is provided as a coat surface material or other playground surface material.

Still another object of the present invention is to provide a method for producing a tennis court surface material or other playground surface material made of the above material.

As a tennis court surface material or other playground surface material, conventionally, general ocher and masato were mixed and used.

However, Masato is well drained, but the soil itself is weak in viscous power, like sand, and the impurities in Masato are white, which reduces the sharpness of the white lines drawn on the playground, while ocher is viscous and has a yellow color. Since it contains many pores, it is easily broken and lost in rainy weather.

In addition, the two materials may be mixed and used, but the particle size of the mixed material is not uniform, which is very cumbersome to filter out during construction.

As a technique to compensate for these shortcomings, a tennis court surface material was recently developed and constructed by crushing red waste brick and sieving and mixing ocher and sieving other functional materials. Since heat is consumed and a lot of expenses are required to mix and mix ocher, etc., production cost is high and it is generally difficult to use.

The present invention is to solve the problem of the price, color or surface homogeneity of the surface of the tennis court using masato or tennis court surface using waste brick powder as mentioned above, neutralizing red mud, a by-product obtained in the Bayer process, with a neutralizing agent. It is then dried to produce artificial earth and to provide a low-cost surface material having a homogeneous material and dark red color by mixing the artificial earth and the mixed material and a method of manufacturing the same.

The present invention neutralizes a red mud having a particle size of about 30 μm or less, which is a by-product obtained from a Bayer process, which is a process of manufacturing aluminum hydroxide, with a neutralizing solution of iron sulfate, followed by drying to produce a red artificial earth. The present invention relates to a surface material prepared from a tennis court surface material or other sports surface material by mixing it with pozzolanic ore powder having a particle size adjusted to 100 mesh and a method of manufacturing the same.

The present invention neutralizes the industrially obtained by-products as described above. The main components of red mud are iron oxide (Fe ₂ O ₃ ), alumina (Al ₂ O ₃ ), silica sand (SiO ₂ ), and sodium oxide (Na _2). O), and other trace elements include phosphorus, sulfur, calcium, zirconium, etc., and the red mud's particle size is mainly 30 mu m or less, usually 5 to 20 mu m. Such red mud has strong alkalinity because it contains sodium oxide (Na ₂ O). When it is neutralized by reacting it with a solution of iron sulfate (Fe (SO ₄ )), sodium oxide (Na ₂ O) in red mud is iron sulfate. Reacts with (Fe (SO ₄ )) to form iron oxide (Fe ₂ O ₃ ) and form some forget-me-not ((Na ₂ (SO ₄ )). The neutralization is 20 to 80% by weight iron sulfate solution in red mud. The pH of the entire solution is adjusted to 6 to 8. The concentration of iron oxide (Fe ₂ O ₃ ) in the artificial soil produced through the above process increases and the other components decrease in concentration. In red mud, the fraction of iron oxide is 35 to 40%, and the fraction of iron oxide in artificial soil is more than 50% Red mud is bright red while iron oxide is dark red. More noticeable to the eye

The artificial soil prepared by the neutralization is again mixed with the admixture to produce a surface material, the surface material is added in a ratio of 20 parts by weight to 1000 parts by weight of admixture with respect to 100 parts by weight of artificial earth, preferably from 100 parts by weight to 500 parts by weight is added. If it is 50 parts by weight or less, the color of the tennis court, etc. may not be clearly represented, and if it is 800 parts by weight or more, the artificial earth may not sufficiently adhere the admixture, which is not good.

The admixture component is a single or mixed use of pozzolanic ore powder, ordinary sand, gypsum, vermiculite, ocher, masato, etc. Since double pozzola ore is a kind of pottery, mainly composed of quartz (SiO ₂ ), Although its properties are similar, the admixture is reddish to nearly purple due to impurities. The pozzolane used has a particle size of 98% at 100 mesh when pulverized. Due to the nature of sand, when sand is settled in water for a long time, it is hard to maintain solid ground, but in most cases it is difficult to maintain the bonding force when a small amount of glass is released from such ground.

The artificial soil, which neutralizes red mud, acts as a viscous body that binds admixtures such as pozzolanic and has a dark red color, and thus represents the color of the tennis court. Pozzolan, a mixed admixture, is slightly red and homogeneous in color. It has a particle size and has a very large specific gravity than water, and thus serves as a filler.

Next, the method of manufacturing the surface material of this invention is demonstrated.

As a method for producing a surface layer material having a homogeneous phase, a lower price, and a better drainage property than a surface layer material mainly containing waste bricks and masatos described above,

Iii) neutralizing the red mud and iron sulfate to produce artificial earth;

Ii) mixing pozzolan with the artificial earth produced in iii) or mixing ordinary sand, gypsum, vermiculite, ocher, masato and the like instead of pozzolan;

Iii) in the case of mixing pozzolanic in ii), further adding functional materials (gypsum, vermiculite, loess, masato) and the like as necessary for the product;

Is manufactured.

 In detail, the red mud, a by-product obtained in the Bayer process, is neutralized with an iron sulfate solution as a neutralizer, and then dried to produce a red artificial earth, and then mixed with a powder of so-called pozzolan ore powder. Provides a method for producing other playground surface material. At this time, the use of ordinary sand, gypsum, vermiculite, ocher, masato, etc. in place of pozzolanic does not make any difference in color or price. In addition, when using pozzolanic, it is better to use vermiculite and gypsum in order to give a function to the surface material, but vermiculite may contain moisture, and gypsum has the effect of increasing the strength of the surface material. Can improve.

Hereinafter, the method of manufacturing the surface layer material of this invention is demonstrated concretely.

First, 300-600 g of about 60% iron sulfate solution is mixed with 1 kg of red mud, and the pH is measured. At this time, if the pH value is 6 ~ 8, it can be regarded as neutral, but if it is bigger or smaller than this, adjust the pH value by adjusting the red mud and iron sulfate solution. Adding more red mud increases the pH value, and adding more iron sulfate solution decreases the pH value. This is dehydrated and dried to prepare artificial soil. At this time, about 30 ~ 40% is taken. Thus, 1kg of artificial earth is shown to show 98% pass rate in 100 mesh of pozzolanic, and 1 ~ 5kg is mixed to prepare a tennis court surface material. The same effect can be achieved by using sand or masato instead of pozzolanic, and it is possible to add moisture to vermiculite, which can contain moisture, and gypsum to increase the strength of cotton to 1 ~ 20% of the total mass. Can be mixed. When the surface material made in this way is applied 5-10cm thick on the surface of tennis court or playground, it gives visually stable feeling. Especially on the tennis court, the red color of the playground contrasts with the yellow ball so that the ball can be clearly recognized, which gives the effect of focusing on the game.

In the following shows more preferred embodiments of the present invention, the present invention is not limited to the following examples, it can be carried out variously modified by those skilled in the art without departing from the technical spirit of the present invention.

<Example 1>

1kg of red mud is mixed with a solution of iron sulfate so that the pH value is 7 so that neutrality is added by adding red mud when the pH is low and by adding more iron sulfate solution when the pH is high. This was dried and dehydrated to prepare artificial soil. A tennis court surface material was prepared by mixing 3 kg of pozzolanic with 98% pass rate at 100 mesh with 1 kg of artificial soil.

<Example 2>

After mixing the red sulfate solution with 1kg of red mud, if the pH is low, further red mud is added, and if the pH is high, the iron sulfate solution is further added so that the pH is 7, and then dried and dehydrated to prepare artificial earth. 3 kg of pozzolane showing 98% pass rate at 100 mesh was mixed with 1 kg of the artificial earth. In order to add functionality to the surface material in the mixture, 10% by weight of the vermiculite, which may contain water, and 10% by weight of the total weight of gypsum were mixed to increase the strength of cotton. .

<Example 3>

After the iron sulfate solution was mixed with 1 kg of red mud, neutralization was performed by adding red mud when the pH was low so that the pH value was 7 and by adding more iron sulfate when the pH was high. It was dried and dehydrated to prepare artificial earth. 1kg of the artificial soil was mixed with 3kg of sifted sand having the same size as pozzolanic as a mixed material, and was prepared as a tennis court surface material.

<Example 4>

In Example 3, the experiment was conducted under the same conditions except that 3 kg of masato was mixed instead of sand.

The surface material using red mud prepared according to the above embodiment showed all of the homogeneity, color, and drainage characteristics of the coat much better than those of the conventional waste brick powder, and the artificial earth and pozzolan component in the above experiment. In the case of including the more homogeneity and drainage in the color or coat, and also in terms of cost was found to be cheaper than the material based on the general Masato.

As described above, the manufacturing method of the tennis court surface layer material using the red mud and pozzolanic mineral powder according to the present invention has a preferable effect that can be constructed in a high-quality athletic field at a low price.

In addition, the surface material made by the method of the present invention gives a visually stable feeling when applied to the surface of the tennis court or playground surface 5-10cm thick. Especially on the tennis court, the red color of the playground contrasts with the yellow ball so that the ball can be clearly recognized, which gives the effect of focusing on the game.

Claims (6)

Preparing an artificial earth by neutralizing by mixing 20 to 80% by weight of an iron sulfate solution with a strong alkaline red mud with a neutralizer; And Mixing 50 to 800 parts by weight of at least one admixture selected from pozzolanic, general sand, gypsum, vermiculite, ocher or masato to 100 parts by weight of the artificial earth; Method for producing a surface material having a. delete The method for producing a surface layer material according to claim 1, wherein the admixture is pozzolan. 4. The method for producing a surface layer material according to claim 3, wherein the admixture is a mixture of general sand, gypsum, vermiculite, loess, and masato. An artificial earth containing iron oxide having a ratio of 50% or more after neutralization by adding a neutralizing solution of iron sulfate as a strong alkaline red mud. A surface layer material containing red mud prepared by any one of claims 1 to 4.