KR100663235B1 - The composition of construction materials using waterworks sludge - Google Patents

Abstract

The present invention is a composition of building materials using purified sludge composed of 30 to 40% by weight of processed sludge, 30 to 40% by weight of ocher, 20 to 30% by weight of fine sand (bongamsa), 10 to 20% by weight of clay and its preparation It is about a method.

Clean water sludge containing composition. Construction material composition. Water purification sludge. brick.

Description

The composition of construction materials using waterworks sludge

The present invention relates to a composition of a building material using purified water sludge, and more specifically, to a composition of a building material using purified water sludge having excellent far-infrared radiation efficiency by recycling purified water sludge generated in the water purification process, and a method for manufacturing the same. will be.

The building materials currently in use are produced by drying a mixture of cement, sand, and gravel at high pressure, and they are produced by universal technology that does not deviate from the basic color and shape of the uniform cement. This is not a problem.

In addition, clay bricks and blocks for building materials are damaged by nature and are produced by simply collecting clay and putting them into a furnace and firing them, thus increasing the burden on purchasing raw materials and not being environmentally friendly.

However, the present invention, unlike the cement block harmful to the human body by the development of a new technology to recycle the purified water sludge, which gives a treatment cost, and maintains the subtle color of the clay itself, by adding a variety of pigments in the case of the beam and driveway block It seems to be able to renew the atmosphere of urban street culture.

In addition, this product, when used as a building material, has excellent far-infrared emission effect, heat insulation, and warmth, which is beneficial to human body.

In addition, as long as the water purification sludge is operated for water supply, water purification sludge continues to occur, so there is no big problem in the supply and demand of raw materials, and the manufacturing cost is low, so it is possible to supply blocks and bricks at a low price, thereby lowering the construction cost. It has come up with a way to recycle the sludge that is being discarded to be effective.

A process for producing brick using ocher soil by mixing ocher soil, cement waterproofing liquid, red iron oxide, etc. is disclosed in Korean Laid-Open Patent Publication Nos. 89-368, 85-5385, and 90-12862. Health mattresses and building materials made of soil and clay are disclosed in Korean Patent Publication Nos. 95-33238 and 96-802, and a technology for mixing briquettes and soil hardeners in mud is disclosed in Korean Patent Publication No. 94 Listed in -7222,

Korean Patent Publication No. 96-11319 describes a method for producing artificial light aggregate using mica, and a method for preparing an inner surface coating of a far-infrared radiation building and a far-infrared radiation mortar composition using natural ore. 3872, and Korean Patent Publication Nos. 96-41102 and 96-29266,

Korean Patent Publication No. 1999-007639 discloses a ceramic composition based on solid waste composed of 75 parts by weight of solid waste, 15 to 45 parts by weight of fly ash, and 5 to 55 parts by weight of clay, and a method of manufacturing the same.

Korean Patent Publication No. 2001-0008071 discloses clay bricks, beams, and roadways, which are prepared by firing purified water sludge in a furnace, adding kaolin and clay, stirring them, preparing them in a high pressure press, drying them, and then reheating them in the furnace. Clay block and its manufacturing method are described,

In Korean Patent Laid-Open Publication Nos. 92-655 and 97-5872, a method of manufacturing ondol magnetic field compositions and building materials mainly based on elvan, mica and magnetic materials is disclosed.

In Korean Patent Publication No. 97-1067, the present invention relates to a glaze composition for treating a ceramic container for treating a surface of a ceramic material such as ceramics.

Korean Patent Publication No. 97-10301 relates to a method for producing far-infrared radiation-emitting ceramics having strong far-infrared radiation-releasing characteristics mainly based on elvan.

Korean Patent Publication No. 97-10301 relates to a method for producing far-infrared radiation-emitting ceramics having strong far-infrared radiation-releasing characteristics mainly based on elvan.

Korean Patent Publication No. 95-23626 discloses a technology related to mortar composition comprising ganbanite and cement as 3.2: 1,

Korean Unexamined Patent Publication No. 93-19580 discloses a refined prefabricated thermal insulation stone panel incorporating cement in natural mineral minerals, mica or elvan, containing germanium minerals.

Conventional technologies as described above have problems that shrinkage and quenching generated during rapid quenching during firing or cooling during construction processes such as building materials, and glaze cracks are generated, and the raw materials are expensive and are not practical.

In order to solve the above problems, the present invention recycles the purified water sludge generated in the water purification process, improves the thermal properties and economics by only mixing without grinding the raw materials, high temperature firing (1200 ~ 1300 ℃) 30 ~ 40% by weight (up to 70%), ocher 30 ~ 40% by weight, fine sand It is a technical object of the present invention to provide a composition of a building material using a purified water sludge composed of 20 to 30% by weight, 10 to 20% by weight of clay and a manufacturing method thereof.

In order to achieve the above object, the present invention focuses on the place where the use of charcoal in a large amount of tap water purification plant to recycle the tap water sludge generated during water purification economically utilizing the ash of the charcoal, processing sludge (800 ℃ Processed Sludge) 30 ~ 40% by weight (up to 70%), ocher 30 ~ 40% by weight, fine sand (Bongsa) 20 ~ 30% by weight, and 10 ~ 20% by weight of clay A composition and a method for producing the same.

의 성분비율이 높아서(51.6%) 열에 강한 성질을 나타냈다.When only purified sludge was dried, the remaining substances (sulfuric acid, alumina, charcoal, etc.) in the sludge were not removed, which caused a decrease in product yield. In order to facilitate the production, the present invention also focused on the complete oxidation of the residual material by firing the purified sludge at 800 ~ 1000 ℃, fully oxidized processed sludge showed very light and fine properties

The high component ratio of (51.6%) showed heat-resistant properties.

As a result of manufacturing building materials using the processed sludge of the present invention, shrinkage was reduced, strength was enhanced, and colors appeared bright.

Previously, the use was 10-20% (dry powder), but in the present invention, 60-70% was available. As a result, by increasing the amount of sludge while showing a beautiful color in the building material of the present invention can be a product excellent in economic efficiency.

Previously, the firing temperature required a lot of fuel costs due to high-temperature firing at 1,200 to 1,300 ° C., but in the present invention, 900 to 1,150 ° C., and preferably 900 to 1,150 ° C., can save about 1/4 of the fuel usage.

Looking at the water purification sludge processing process, after confirming the water content after completely drying the purified sludge for 5 hours in a 100 ℃ drying furnace it was found that the moisture content 54% water sludge 46%. Processed sludge can be obtained by completely baking dried purified sludge at 800 ~ 900 ℃.

22.7중량%,

25.8중량%,

0.8 중량%

0.51중량%,

2.17중량%,

0.89중량%,

0.40중량%,

0.19중량%,

1.59중량%, 강열감량 44.95중량% 임을 알 수 있다.Looking at the composition of the processed sludge produced in the present invention (KS L 4007-2001 wet analysis and instrumental analysis (ICP-OES) analysis method),

22.7% by weight,

25.8% by weight,

0.8 wt%

0.51% by weight,

2.17% by weight,

0.89% by weight,

0.40% by weight,

0.19% by weight,

It can be seen that 1.59% by weight, 44.95% by weight loss.

The raw material mixing process of the present invention is a raw material mixture of sludge (800 ℃ processing sludge) 30-40% by weight, loess 30-40% by weight, fine sand (bongsa) 20-30% by weight, clay 10-20% by weight Add water and mix to make water content 18-21%. The mixed raw materials are transferred to the raw material storage by the conveyor. After the transfer, the raw material is supplied to the molding machine.

The raw material of the raw material storage tank is put into the molding machine to make the vacuum degree 76mmHg / cm 2 or more by vacuum drilling method to completely remove the air contained in the raw material. About 20% of the moisture is maintained to be continuously molded in the molding machine. The molded product is cut to a suitable size and transferred to a drying chamber.

Dry the product slowly for at least 20 hours to avoid warping and bursting. Dry in a drying furnace for 24 hours. Complete removal of moisture during drying will minimize product defects.

The dried product is placed in a kiln and preheated slowly. Preheating time is preferably 24 hours or more. The maximum temperature during preheating is 800-900 ℃. The preheated product enters the main firing. This firing time is preferably 12 hours or more. This product is characterized by high content of Al2O3 and little change in heat. With sufficient firing, the color of the product appears beautiful. The higher the firing temperature, the higher the quality of the product can be produced, but in consideration of economic efficiency, the composition was set at 1200 ℃. Cooling starts at 1200 ℃ and then cooled to room temperature. At this point, be careful not to quench.

When quenched, the product breaks down. The kiln should be tunnel kiln and the firing length should be at least 70m. The total firing time should be more than 50 hours to produce high quality products.

Hereinafter, the present invention will be described in detail through examples.

Example

First process (water purification sludge processing process)

22.7중량%,

25.8중량%,

0.8 중량%

0.51중량%,

2.17중량%,

0.89중량%,

0.40중량%,

0.19중량%,

1.59중량%, 강열감량 44.95중량%로 조성된 가공슬러지를 제조한 다음, 1 ton of sludge from the water treatment plant is put into rotary kiln and calcined for 3 ~ 5 hours at 800 ℃ ~ 850 ℃ temperature to make 80 ~ 120kg (maximum 400 ~ 600kg)

22.7% by weight,

25.8% by weight,

0.8 wt%

0.51% by weight,

2.17% by weight,

0.89% by weight,

0.40% by weight,

0.19% by weight,

1.59 wt% of the processed sludge was prepared at a loss of 44.95 wt%, and then

Second Process (Composition Manufacturing Process)

The composition was prepared by mixing 30 kg (maximum ratio 70 Kg), ocher 30 kg, 20 kg of fine sand (bongjasa), and 20 kg of clay, which were processed sludge (800 ° C. processed sludge) prepared in the first step.

Third process (building materials manufacturing process)

Water is added to the composition prepared in the second step, kneaded to have a water content of 18 to 21% by weight, and then the kneaded raw material is transferred to a raw material storage bin by a conveyor, and then discharged from the raw material storage tank into a molding machine. After vacuum removal method, the degree of vacuum should be 76mmHg / cm2 or more to completely remove the air contained in the raw material, and the water content is maintained at about 20% by weight, which is continuously molded in a molding machine. After moving to the, the molded product transferred to the drying chamber was dried at a temperature of 200 ~ 400 ℃ for 20 to 24 hours,

The dried product was put into a kiln and preheated to 900 ° C. for at least 24 hours, and then fired at 1200 ° C. for 12 hours, followed by slow cooling at about 70 hours in a 70m slow cooling furnace to prepare building materials.

Experimental Example 1

The building material (brick) specimens prepared as in Example were immersed in water for 24 hours and then immediately tested for flexural strength. Bending strength was measured according to the following formula by applying the supporting material to the bottom of both sides of the specimen and applying the pressing load to the center part. Where P is the maximum load (N) {kgf} indicated by the tester, L is the distance between the supports (cm), b is the average width (cm2) at right angles between the points, and d is the average thickness of the brick (cm). .

On the other hand, according to the KS standard, the bending block should be at least 490N / ㎠ {50kgf / ㎠}, the road block is 588N / ㎠ {60kgf / ㎠} The bending strength of the building material (brick) of the present invention is 592N / ㎠ The numerical value of {60kgf / cm <2> was shown, and it turned out that the specification conditions are fully satisfied.

Experimental Example 2 (acid resistance, alkali resistance experiment)

Building materials produced by the embodiment of the present invention can be seen that the acid resistance and alkali resistance is superior to the cement brick. 10 Vol% HCl and 10 Vol% MaOH aqueous solution were soaked in the wetland for 24 hours at 20 ° C to observe the change and test.

As a result, the building materials of the present invention did not change in the wetland attachment portion, but the cement product was corroded.

Experimental Example 3 (East Sea Experiment)

After immersing the building materials of the present invention in water for 24 hours to allow the water to be completely absorbed, it is placed in a freeze-dissolving experiment tank and left in a frozen state at -20 ° C. for 80 minutes and then taken out and dissolved in 30 ° C. water for 20 minutes.

This experiment was repeated and no abnormality occurred up to 500 cycles. In the case of a typical building material, more than 300 cycles are considered to be freeze resistant.

It is superior to cement and concrete and similar to earthen material, but better than that.

의 순도가 높아서 열에 강한 성질을 가지며, 가공 슬러지를 이용해서 벽돌 제조를 실시한 결과 수축율이 줄어들었고 강도가 증진 됐으며 색상이 밝게 나타나고 특징이 있으며, 점토와 혼합하여 제품을 생산하므로 건조공정이 단축될 수 있으며 슬러지 사용양을 현저하게 많이 사용할 수 있고, 소성온도가 종전에는 1,200~1,300℃의 고온 소성에 의해서 연료비가 많이 소요되었으나 본 실험에서는 900~1,150℃ 소성으로 연료 사용량을 1/4정도 절감할 수 있고, 정수 슬러지의 사용으로 원적외선 방사효율을 증대시키는 효과가 있는 것이다.

Unlike the conventional techniques as described above, the present invention can reduce the production cost to 40% (up to 70%) level by using the purified water sludge, which is economically effective, and occurs in the quench during rapid quenching during use. It can reduce the cracks, extend the life of the product, and process the sludge after completely oxidizing the residual material by firing the purified sludge at 800 ~ 1000 ℃.

It has high purity and has strong heat resistance, and as a result of brick manufacturing using processed sludge, shrinkage rate is increased, strength is increased, color is bright and characteristic, and it is mixed with clay to produce products, which can shorten the drying process. The amount of sludge can be used remarkably, and the fuel cost was much higher by the high-temperature firing of 1,200 ~ 1,300 ℃ before, but in this experiment, the fuel consumption can be reduced by 1/4 by 900 ~ 1,150 ℃ firing. In addition, there is an effect of increasing the far-infrared radiation efficiency by the use of purified sludge.

Claims (3)

In the composition of building materials using purified sludge, The sludge produced in the waterworks was fired for 3 to 5 hours at 800 ℃ ~ 850 ℃.

22.7% by weight,

25.8 wt%, CaO 0.8 wt%

0.51% by weight,

2.17% by weight,

0.89% by weight,

0.40% by weight,

0.19% by weight,

Processed sludge composed of 1.59% by weight, 44.95% by weight loss, 30-40% by weight, 30-40% by weight ocher, 20-30% by weight fine sand (bongsa), 10-20% by weight clay Composition of building materials using purified water sludge, characterized in that. delete In the manufacturing method of the composition of building materials using purified sludge, First process (water purification sludge processing process) 1 ton of sludge from the water treatment plant is put into rotary kiln and calcined for 3 ~ 5 hours at 800 ℃ ~ 850 ℃ temperature to make 80 ~ 120kg (maximum 400 ~ 600kg)

22.7% by weight,

25.8% by weight,

0.8 wt%

0.51% by weight,

2.17% by weight,

0.89% by weight,

0.40% by weight,

0.19% by weight,

1.59 wt% of the processed sludge was prepared at a loss of 44.95 wt%, and then Second Process (Composition Manufacturing Process) Process for producing a composition of building materials using purified sludge, characterized in that 40 kg of processed sludge prepared in the first process, 30 kg of ocher, 20 kg of fine sand (Bongsa), 10 kg of clay.