KR20020049587A - A preparation method of light weight slag - Google Patents
A preparation method of light weight slag Download PDFInfo
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- KR20020049587A KR20020049587A KR1020000078776A KR20000078776A KR20020049587A KR 20020049587 A KR20020049587 A KR 20020049587A KR 1020000078776 A KR1020000078776 A KR 1020000078776A KR 20000078776 A KR20000078776 A KR 20000078776A KR 20020049587 A KR20020049587 A KR 20020049587A
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- slag
- temperature
- water
- molten slag
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- 239000002893 slag Substances 0.000 title claims abstract description 118
- 238000002360 preparation method Methods 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 27
- 238000007664 blowing Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 abstract description 18
- 238000005187 foaming Methods 0.000 abstract description 13
- 239000004035 construction material Substances 0.000 abstract description 7
- 238000010791 quenching Methods 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 description 15
- 239000000654 additive Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000003651 drinking water Substances 0.000 description 5
- 235000020188 drinking water Nutrition 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
- C04B5/065—Porous slag
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture Of Iron (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 경량 수쇄슬래그를 제조하는 방법에 관한 것으로, 보다 상세하게는 고로의 용융 슬래그로부터 수쇄슬래그를 제조할 때 그 발포성을 잘 조절함으로써 경량화된 수쇄슬래그를 제조하는 방법에 관한 것이다.The present invention relates to a method for producing lightweight hydroslag, and more particularly, to a method for producing lightweight hydroslag by controlling the foamability of the hydroslag slag from the blast furnace molten slag.
고로의 수쇄슬래그는 용융 슬래그를 고압수와 직접 접촉시켜 급냉시키게 되므로 일반적으로 비결정질 구조가 98%이상을 차지하고 있으며, 비결정질 구조로부터 기인하는 잠재수경성(Latent hydrulic property) 특성을 나타내기 때문에 시멘트의 강도 발현 특성에 중요한 영향을 미치고 있다. 이러한 특성으로 인해 수쇄슬래그는 주로 시멘트 클린커 원료, 지반 개량제, 콘크리트용 잔골재, 규산 석회질 비료, 기타 요업재료등 다양한 용도로 활용되고 있다. 특히 최근에는 상기에서 언급한 바와 같은 구조용 재료로서뿐 아니라 기능성 재료, 즉 건축물의 단열성, 차음성등과 같은 원료로서의 이용이 점차 확대되고 있는 상태이다.Since the blast furnace slag is quenched by directly contacting the molten slag with high pressure water, the amorphous structure occupies more than 98%, and the strength of cement is expressed because it exhibits latent hydrulic properties resulting from the amorphous structure. It has a significant impact on characteristics. Due to these characteristics, crushed slag is mainly used for various purposes such as cement clinker raw material, ground modifier, concrete aggregate, siliceous lime fertilizer, and other ceramic materials. In particular, in recent years, the use as a structural material as mentioned above as well as a functional material, that is, a raw material such as heat insulation, sound insulation, etc. of a building is gradually expanding.
고로 수쇄슬래그는 SiO2성분을 약 30%정도 함유하고 있어 용융 슬래그 상태에서 어느정도의 점도를 유지하고 있기 때문에 수쇄슬래그로 제조할 때의 취제조건등에 따라 약간의 차이는 있지만 비중은 통상 약0.9∼1.0정도의 값을 갖는다.Since the blast furnace slag contains about 30% of SiO 2 and maintains a certain viscosity in the molten slag state, there are some differences depending on the conditions of preparation when producing the slag, but the specific gravity is usually about 0.9 to 1.0. It has a value.
수쇄슬래그가 이처럼 낮은 비중을 나타내는 것은 용융 슬래그가 냉각수에 의해 급냉되어질 때 슬래그내에 함유되어 있는 유황분이 산화되어 SO2로 방출되거나 물과의 접촉에 의해 H2S를 발생하기도 하며, 또한 과포화 상태로 용존하고 있는 N2, CO등의 가스들이 방출됨에 따라 발포가 촉진되기 때문이다.This low specific gravity of crushed slag means that when molten slag is quenched by the cooling water, sulfur content contained in the slag is oxidized and released into SO 2 , or H 2 S is generated by contact with water. This is because foaming is accelerated as gases such as N 2 and CO dissolved are released.
이같은 발포성을 갖는 수쇄슬래그가 물에 의해 입상화되어 냉각되어지면 수증기의 작용에 의해 더욱 발포성이 촉진되게 된다. 즉, 표면 부분은 물과의 접촉에 의해 급격히 점성이 상승하여 내부에서 발생된 가스들을 방출하지 못하기 때문에 급격히 팽창현상을 일으켜 미립상 입자 내부에 다수의 기공을 가진 미립상의 수쇄슬래그로 제조되게 된다.When the foamed slag having such foamability is granulated by water and cooled, foamability is further promoted by the action of water vapor. In other words, the surface portion is rapidly made viscous by contact with water and thus does not release the gases generated therein, causing rapid expansion and making it into fine grained slag having a large number of pores inside the particulate particles. .
이에 본 발명자들은 이와같은 수쇄슬래그의 발포성을 잘 조절하면 건설 재료에 대하여 단열성, 차음성, 경량성, 보온성등을 부여할 수 있는 기능성 원료로서의 활용이 가능하다는 점에 주목하였다.Accordingly, the present inventors noted that, if the foamability of the crushed slag is well controlled, the present invention can be utilized as a functional raw material that can impart heat insulation, sound insulation, light weight, and thermal insulation to construction materials.
현재 수쇄슬래그의 품질을 조절하기 위해 제안 내지는 실시되고 있는 방법으로서는 일본 특개평7-315894에 기재된 바와 같은 취제수의 수량을 조절하여 수쇄슬래그의 입경분포를 제어하는 방법, 일본 특개소53-123394에 기재된 바와 같은 용융 슬래그에 더스트류나 슬러지류를 첨가하여 용융 슬래그의 온도를 강하하는 방법, 및 일본 특개소54-31097에 기재된 바와 같은 용융 슬래그를 회전 드럼에 낙하시켜 입경을 제어하는 방법등을 들 수 있다.As a method currently proposed or implemented for controlling the quality of crushed slag, a method of controlling the particle size distribution of crushed slag by adjusting the quantity of the odorous water as described in Japanese Patent Application Laid-Open No. 7-315894, Japanese Patent Application Laid-Open No. 53-123394. And a method of lowering the temperature of the molten slag by adding dusts or sludges to the molten slag as described, and a method of controlling the particle diameter by dropping the molten slag as described in Japanese Patent Application Laid-Open No. 54-31097 to a rotating drum. have.
그러나 이같은 종래 기술은 모두 수쇄슬래그를 시멘트 원료등의 구조용 재료로서 사용하기 위하여 수쇄슬래그의 물성을 제어하는데 제한되어 있으며, 본 발명자들이 주목한 바와 같은 건설 재료로서 사용할 수 있도록 수성슬래그의 물성을 제어하여 기능성을 부여하는 방식은 보고된 바가 없는 실정이다.However, all of these prior arts are limited in controlling the physical properties of the hydroslag slag in order to use the hydroslag slag as a structural material such as cement raw material, and by controlling the physical properties of the aqueous slag so that the present inventors can use it as a construction material. There is no report on how to give functionality.
이에 본 발명의 목적은 건설재료로서 경량성, 단열성, 보온성, 차음성등의 기능성을 구비하도록 수쇄슬래그의 발포성을 향상시켜 슬래그를 경량화시킬 수 있는 방법을 제공하려는데 있다.Accordingly, an object of the present invention is to provide a method for reducing the slag weight by improving the foaming properties of the crushed slag so as to have functionality such as light weight, heat insulation, insulation, sound insulation, and the like as a construction material.
본 발명에 의하면,According to the invention,
고로의 용융 슬래그로부터 수쇄슬래그를 제조함에 있어서,In the production of crushed slag from blast furnace molten slag,
상기 용융 슬래그에 슬래그의 중량기준으로 Al2O3및 P2O5로 이루어진 그룹으로부터 선택된 1종이상을 3.0∼7.0% 범위내로 첨가한 다음 상기 용융 슬래그의 온도를 1400℃이상으로 조절하고, 이어서 취제수의 온도를 70℃이상으로 조절하여 취제하는 것을 특징으로 하는 경량 수쇄슬래그를 제조하는 방법이 제공된다.At least one member selected from the group consisting of Al 2 O 3 and P 2 O 5 is added to the molten slag in the range of 3.0 to 7.0%, and then the temperature of the molten slag is adjusted to 1400 ° C. or more, and then Provided is a method for producing a light-weight crushed slag characterized in that the controlled temperature of the blowing water to 70 ℃ or more.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에서 고로의 용융 슬래그로부터 수쇄슬래그를 제조할 경우 용융 슬래그에는 Al2O3및 P2O5로 이루어진 그룹으로부터 선택된 1종이상을 첨가하여 발포성을 조절하게 된다. 여기서 발포성은 향상 방향으로 조절함으로써 슬래그로부터 제조된 구조체의 경량화, 단열성, 보온성, 차음성등 건설재료로서 요구되는 기능성을 모두 충족할 수 있다.In the present invention, when the hydrothermal slag is manufactured from the molten slag of the blast furnace, at least one member selected from the group consisting of Al 2 O 3 and P 2 O 5 is added to the molten slag to adjust foamability. Here, by controlling the foaming property in the direction of improvement, it is possible to satisfy all of the functionality required as construction materials such as light weight, heat insulation, heat insulation, sound insulation, etc. of the structure manufactured from slag.
상기 Al2O3와 P2O5는 모두 산성 산화물로서 용융슬래그의 염기도를 떨어뜨림으로써 Al2O3나 P2O5의 발포 성능이 향상되게 되는 경향을 이용한 것으로, 이와 동일 내지는 유사한 효과를 내는 산성산화물이라면 어떠한 종류이든지 사용할 수 있을 것으로 유추된다.Al 2 O 3 and P 2 O 5 are both acidic oxides, which are used to reduce the basicity of the molten slag to improve the foaming performance of Al 2 O 3 or P 2 O 5 . It is inferred that any type of acid oxide could be used.
상기 Al2O3와 P2O5성분들의 총함량은 3.0∼7.0% 범위로 조절하여 첨가하는 것이 바람직한데, 그 함량이 3%미만이 되면 슬래그의 발포성이 촉진되지 않아 슬래그의 경량화를 기대할 수 없으며, 7%를 초과하면 용융 슬래그의 점도가 온도에 따라 급격하게 변화하기 때문에 용융 슬래그의 온도 조절이 용이하지 않기 때문에 바람직하지 않은 것이다. 또한 Al2O3와 P2O5를 혼합하는 경우 그 혼합비는 특별하게 한정하는 것은 아니다.The total content of the Al 2 O 3 and P 2 O 5 components is preferably adjusted to be added in the range 3.0 to 7.0%, if the content is less than 3% slag foaming is not promoted can be expected to reduce the weight of the slag It is not preferable because the viscosity of the molten slag is drastically changed depending on the temperature if it exceeds 7%, because the temperature of the molten slag is not easily controlled. In addition, if the mixture of Al 2 O 3 and P 2 O 5 that the mixing ratio is not necessarily limited.
이같이 Al2O3또는 P2O5를 일정량 투입한 다음 고로 용융 슬래그의 온도를 1400℃ 이상으로 유지시킨다. 이때 그 온도가 1400℃미만일 경우에는 용융 슬래그의 점도가 급격히 상승하여 냉각시 슬래그로부터 이탈하여 발포를 촉진시키는 가스들이 슬래그로부터 용이하게 이탈하지 못하고 슬래그 내부에 잔존하게 되므로 차후 취제처리후 슬래그의 발포를 촉진할 수 없는 결과를 낳게 되어 바람직하지 않다. 이때 고온 유지시간은 길어야 1-2분 정도면 충분하다.As such, a predetermined amount of Al 2 O 3 or P 2 O 5 is added, and the temperature of the blast furnace molten slag is maintained at 1400 ° C. or higher. In this case, if the temperature is less than 1400 ℃, the viscosity of the molten slag rises sharply and escapes from the slag upon cooling, so that the gases that promote foaming do not easily escape from the slag and remain inside the slag, so the foaming of the slag after the subsequent treatment is performed. It is not desirable to produce results that cannot be promoted. At this time, the high temperature holding time should be 1-2 minutes long enough.
이같이 1400℃이상으로 용융슬래그 온도를 유지한 다음 또한 용융 슬래그를 냉각시키는 취제수를 70℃이상으로 조절하여 취제하는 것이 바람직하다. 이는 취제수 온도를 70℃미만으로 조절하게 되면 취제수의 증기 발생에 의해 유도되는 발포성이 저하하게 되어 발포성의 촉진을 기대할 수 없기 때문이다.As such, it is preferable to maintain the molten slag temperature at 1400 ° C. or higher and then to adjust the blowing water for cooling the molten slag to 70 ° C. or higher. This is because, when the temperature of the blowing water is adjusted to less than 70 ° C., the foamability induced by the generation of steam of the drinking water is lowered, so that the promotion of the foamability cannot be expected.
본 발명에 의하면, 고로의 용융슬래그에 Al2O3및/또는 P2O5를 투입하고 그 온도를 1400℃이상으로 유지시킴으로써 1차적으로 슬래그내 가스를 방출시키게 되며, 그런 다음에 70℃이상의 취재수와 접촉시킴으로써 수증기를 증발시켜 결과적으로 슬래그 입자내에 코어(core)를 다수 생성시키게 되어 발포성이 재차 증가시키게 되며, 나아가 경량화되는 효과를 얻게 된다.According to the present invention, by injecting Al 2 O 3 and / or P 2 O 5 into the molten slag of the blast furnace and maintaining the temperature above 1400 ℃, the gas in the slag is first released, then 70 ℃ or more By contacting the covering water, water vapor is evaporated, and as a result, a large number of cores are generated in the slag particles, thereby increasing the foamability again and further reducing the weight.
이와같이 본 발명에서 제조된 경량화된 슬래그는 발포성이 개선됨에 따라 단열성, 차음성등의 기능을 부여할 수 있을 것으로 유추되는 바, 따라서 경량성, 단열성, 차음성등의 기능을 모두 갖춘 건설재료로서 유용하게 사용할 수 있다.As such, the light weighted slag manufactured in the present invention is inferred to be capable of imparting functions such as heat insulation and sound insulation as the foaming property is improved, and thus is useful as a construction material having all functions of light weight, heat insulation, and sound insulation. Can be used.
이하, 실시예를 통하여 본 발명을 상세히 설명하며, 이는 본 발명을 예시하고자 하는 것으로 본 발명을 이에 한정하려는 것은 아니다.Hereinafter, the present invention will be described in detail through examples, which are intended to illustrate the present invention and are not intended to limit the present invention.
<실시예 1><Example 1>
(발명예 1∼11)Invention Examples 1 to 11
회전 용융로에서 용해한 고로 수쇄슬래그 1kg에 Al2O3및 P2O5를 각각 30g, 40g, 50g, 60g, 70g씩 첨가하여 이들 첨가량이 슬래그 중량기준으로 각각 3%, 4%, 5%, 6%, 7%비가 되도록 조절하였다. 또한 Al2O325g과 P2O525g을 혼합하여 첨가하고 이들 두성분의 혼합 첨가량이 슬래그 중량기준으로 5%가 되도록 조절하였다.30 g, 40 g, 50 g, 60 g, and 70 g of Al 2 O 3 and P 2 O 5 were added to 1 kg of blast furnace slag dissolved in a rotary melting furnace, respectively. %, 7% ratio was adjusted. In addition, 25 g of Al 2 O 3 and 25 g of P 2 O 5 were mixed and added, and the mixed amount of these two components was adjusted to be 5% based on the slag weight.
그후 상기 용융슬래그를 재가열하여 첨가 성분들을 완전히 용해한 후 슬래그 온도를 1432℃로 1분간 조절한 다음 80℃로 조절한 취제수와의 직접 접촉에 의해 급냉시키므로써 평균 5.0mm 100%의 미립상 수쇄슬래그를 각각 제조하였다.The molten slag was then reheated to completely dissolve the additives, and the slag temperature was adjusted to 1432 ° C. for 1 minute, followed by quenching by direct contact with the quenched water adjusted to 80 ° C., so that the average grain slag was 5.0 mm 100%. Were prepared respectively.
제조한 수쇄슬래그의 비중을 비중 측정기를 이용하여 측정하고 그 결과를 하기 표1에 나타내었다.The specific gravity of the produced crushed slag was measured using a specific gravity measuring instrument and the results are shown in Table 1 below.
(비교예 1∼4)(Comparative Examples 1 to 4)
본 발명과의 대비를 위하여 Al2O3및 P2O5를 각각 10g, 20g, 100g씩 첨가하여 이들 첨가물질의 첨가량을 슬래그 중량기준으로 1%, 2%, 10%로 조절하고, 또한 Al2O350g과 P2O550g을 혼합하여 첨가하고 이들 두 혼합물질의 첨가량을 슬래그 중량기준으로 10%로 조절한 것을 제외하고는 상술한 발명예와 동일한 방법을 반복하고, 이들로부터 제조된 비교예 시편으로부터의 비중 측정결과를 하기표 1에 함께 나타내었다.For the preparation of the present invention, Al 2 O 3 and P 2 1% of these additives query amount of O 5 respectively added at 10g, 20g, 100g to slag by weight, of 2% and adjusted to 10%, and Al 2 50 g of O 3 and 50 g of P 2 O 5 were mixed and added, and the same method as in the above-described invention was repeated except that the amount of the two mixtures was adjusted to 10% based on the weight of slag, and a comparison made from them was performed. Example Specific gravity measurement results from the specimens are shown in Table 1 together.
(종래예)(Conventional example)
대비를 위하여 종래 기술로서 회전 용융로에서 고로 수쇄슬래그 1kg을 가열하여 용융시키고, 슬래그 온도를 1432℃로 조절한 후 30℃로 조절한 취제수와 직접 접촉시켜 급냉시키므로서 미립상의 수쇄슬래그를 제조하였다. 제조된 수쇄슬래그의 비중측정결과를 하기표 1에 또한 함께 나타내었다.For comparison, fine granulated slag was prepared by heating and melting 1kg of blast furnace slag slag in a rotary melting furnace as a prior art, and then quenching the slag temperature by adjusting the slag temperature to 1432 ° C. The results of specific gravity measurement of the produced hydrated slag are also shown in Table 1 below.
상기표에서 알 수 있는 바와 같이, 본발명의 첨가물질인 Al2O3및/또는 P2O5를 슬래그 중량기준으로 3.0∼7.0% 범위로 첨가후 조절하여 사용한 경우(발명예1∼11)에는 종래예와 비교해볼 때 제조된 슬래그의 비중이 현저히 감소하게 되어 슬래그의 경량화가 가능하다는 사실을 알 수 있다.As can be seen from the above table, Al 2 O 3 and / or P 2 O 5 , which is an additive substance of the present invention, was added and adjusted in the range of 3.0 to 7.0% based on the weight of slag (Invention Examples 1 to 11). In comparison with the prior art it can be seen that the weight of the slag can be significantly reduced since the specific gravity of the produced slag is significantly reduced.
또한 용융 슬래그에 첨가하는 Al2O3및 P2O5의 첨가량이 상기 발명예의 범위를 벗어나는 경우(비교예(1∼7))에는 비중이 감소하기는 하나 슬래그의 경량화를 가능할 정도로의 현저한 변화는 확인할 수는 없었다.In addition, when the amount of Al 2 O 3 and P 2 O 5 added to the molten slag is out of the range of the above-described invention (Comparative Examples (1 to 7)), the specific gravity is reduced, but a significant change is possible to reduce the weight of the slag. Could not be confirmed.
특히 발명예 4 및 5에서 보듯이, 용융 슬래그에 첨가하는 Al2O3및 P2O5의 첨가량을 슬래그 중량기준으로 6.0∼7.0%범위로 조절하여 제조한 경우에 발포 현상이 현저히 촉진되게 되므로 슬래그를 경량화하기에 가장 적합한 조건임을 확인할 수 있었다.Particularly, as shown in Inventive Examples 4 and 5, foaming phenomenon is remarkably promoted when the amount of Al 2 O 3 and P 2 O 5 added to molten slag is adjusted to 6.0 to 7.0% based on the slag weight. It was confirmed that this is the most suitable condition for reducing the slag weight.
따라서 슬래그의 경량화를 위해서는 용융 슬래그에 Al2O3및 P2O5성분을 일정량 첨가하는 것이 매우 효과적인 것을 입증하였으며, Al2O3및 P2O5로 이루어진 그룹으로부터 선택된 첨가량은 슬래그의 중량기준으로 3.0∼7.0%범위, 보다 바람직하게는 6.0∼7.0%범위인 것을 확인하였다.Therefore, in order to reduce the weight of the slag was proved that it is effective that a certain amount is added to Al 2 O 3 and P 2 O 5 component to the molten slag, the amount selected from the group consisting of Al 2 O 3 and P 2 O 5 is in the slag by weight It confirmed that it was 3.0 to 7.0% of range, More preferably, it is 6.0 to 7.0% of range.
<실시예 2><Example 2>
(발명예 12∼13)(Invention Examples 12-13)
상기 실시예 1에서 제조한 발명예 4를 사용하였으며, 슬래그 온도를 1450℃ 및 1500℃로 각각 조절후 90℃로 조절한 취제수와 직접 접촉시킨 것을 제외하고는 상기 실시예 1과 동일한 방법을 반복하여 미립상의 수쇄슬래그를 각각 제조하였다.Inventive Example 4 prepared in Example 1 was used, and the same method as in Example 1 was repeated except that the slag temperature was adjusted to 1450 ° C. and 1500 ° C., respectively, followed by direct contact with the drinking water adjusted to 90 ° C. The granulated hydrated slag was prepared, respectively.
제조한 수쇄슬래그의 비중을 비중 측정기를 이용하여 측정하고 그 결과를 하기표 2에 나타내었다.The specific gravity of the produced crushed slag was measured using a specific gravity measuring instrument and the results are shown in Table 2 below.
(비교예 8∼10)(Comparative Examples 8 to 10)
슬래그의 온도를 1380℃로 조절하고, 취제수의 온도를 40℃ 및 70℃로 각각 조절한 것을 제외하고는 상기 실시예 1과 동일한 방법을 반복하고 그 비중측정결과를 하기표 2에 나타내었다.The same procedure as in Example 1 was repeated except that the slag temperature was adjusted to 1380 ° C., and the temperature of the drinking water was adjusted to 40 ° C. and 70 ° C., respectively, and the results of specific gravity measurement are shown in Table 2 below.
상기표에서 보듯이, 본 발명의 첨가물질인 Al2O3를 첨가하고 슬래그 온도 및 취제수의 온도를 각각 1400℃이상, 70℃이상으로 조절하여 제조한 수쇄슬래그는 발포현상이 현저히 촉진되어 슬래그의 비중이 현저히 저하된다는 사실을 확인할 수 있었다.As shown in the above table, the hydrated slag prepared by adding Al 2 O 3 , the additive material of the present invention, and adjusting the slag temperature and the temperature of the odorized water to 1400 ° C. or higher and 70 ° C. or higher, respectively, has a markedly enhanced foaming phenomenon. It was confirmed that the specific gravity of significantly decreased.
그러나 Al2O3를 첨가하였음에도 불구하고 슬래그의 온도를 1400℃이하로 하거나 취제수의 온도를 80℃ 미만으로 한 경우(비교예 8∼10)에서는 비중은 어느정도 감소하였으나 건설재료로 사용가능할 정도로의 현저한 발포성을 기대할 수는 없어 결과적으로 슬래그의 경량화에는 불충분한 조건임을 확인하였다.In spite of the addition of Al 2 O 3 , however, the specific gravity of the slag was lower than 1400 ℃ or the temperature of the blowing water was lower than 80 ℃ (Comparative Examples 8-10). Significant foaming properties could not be expected, and as a result, it was confirmed that the conditions were insufficient for lightening the slag.
즉, 이는 용융 슬래그의 온도가 1400℃이하인 경우에는 용융 슬래그의 점도가 현저히 상승되어 취제수와의 접촉에 의해 미립화될 때 슬래그내에 함유되어 있는 가스류의 이탈이 용이하지 않게되어 발포성이 현저히 저감되기 때문인 것으로 여겨진다.That is, when the temperature of the molten slag is 1400 ° C. or less, the viscosity of the molten slag is significantly increased, and when the atomized slag is atomized by contact with the drinking water, the gas flow contained in the slag is not easily released and the foamability is significantly reduced. It seems to be because.
또한 용융 슬래그의 온도가 1400℃이상으로 조절된다고 하여도 취제수의 온도가 80℃미만인 경우에는 취제수에 의한 증기 발생에 따라 촉진되는 발포성이 저하되기 때문에 또한 경량화하기가 어려운 것으로 여겨진다.In addition, even if the temperature of the molten slag is controlled to 1400 DEG C or higher, when the temperature of the blowing water is less than 80 DEG C, the foamability promoted by the generation of steam by the blowing water is deteriorated.
따라서 슬래그의 경량화를 도모하기 위해서는 용융 슬래그에 Al2O3혹은 P2O5를 단독 또는 혼합한 상태로 용융 슬래그의 중량기준으로 3.0∼7.0%범위로 첨가한 다음 용융 슬래그의 온도를 1400℃이상, 취제수의 온도를 70℃이상으로 조절하여 처리하여야만 발포성 개선 효과가 현저한 수쇄슬래그를 제조할 수 있음을 확인하였다.Therefore, in order to reduce the weight of the slag, Al 2 O 3 or P 2 O 5 is added to the molten slag alone or in a mixed state in the range of 3.0 to 7.0% based on the weight of the molten slag, and then the temperature of the molten slag is higher than 1400 ° C. In addition, it was confirmed that only the treatment of controlling the temperature of the odorous water to 70 ° C. or more could produce a hydrolyzed slag having a significant foaming effect.
상술한 바와 같이, 본 발명의 방법에 의하면 용융 슬래그에 Al2O3및/또는 P2O5를 일정량 첨가한 다음 용융 슬래그의 온도를 1400℃이상, 취제수의 온도를 70℃이상으로 조절하면 슬래그 입자를 건설재료로 사용할 수 있을 정도로 경량화시킬 수 있었다.As described above, according to the method of the present invention, if a predetermined amount of Al 2 O 3 and / or P 2 O 5 is added to the molten slag, then the temperature of the molten slag is adjusted to 1400 ° C. or higher and the temperature of the drinking water to 70 ° C. or higher. Slag particles could be made light enough to be used as construction materials.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54132446A (en) * | 1978-04-06 | 1979-10-15 | Nippon Chem Ind Co Ltd:The | Coating material for arc welding electrode |
| JPH04247104A (en) * | 1991-01-30 | 1992-09-03 | Taguchi Kenkyusho:Kk | Water permeable subgrade and method of constructing the same |
| JP2000233952A (en) * | 1999-02-10 | 2000-08-29 | Nippon Steel Corp | Production of blast-furnace granulated slag |
| KR20010017293A (en) * | 1999-08-10 | 2001-03-05 | 이구택 | A Method for Preparing Water-Granulated Slag Having Low Density |
| KR20010055180A (en) * | 1999-12-09 | 2001-07-04 | 이구택 | A Method for Manufacturing Water-Granulated Slag Having Foaming Property |
-
2000
- 2000-12-19 KR KR1020000078776A patent/KR20020049587A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54132446A (en) * | 1978-04-06 | 1979-10-15 | Nippon Chem Ind Co Ltd:The | Coating material for arc welding electrode |
| JPH04247104A (en) * | 1991-01-30 | 1992-09-03 | Taguchi Kenkyusho:Kk | Water permeable subgrade and method of constructing the same |
| JP2000233952A (en) * | 1999-02-10 | 2000-08-29 | Nippon Steel Corp | Production of blast-furnace granulated slag |
| KR20010017293A (en) * | 1999-08-10 | 2001-03-05 | 이구택 | A Method for Preparing Water-Granulated Slag Having Low Density |
| KR20010055180A (en) * | 1999-12-09 | 2001-07-04 | 이구택 | A Method for Manufacturing Water-Granulated Slag Having Foaming Property |
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