KR100384640B1 - Manufacturing method of acid soil improver using slag - Google Patents
Manufacturing method of acid soil improver using slag Download PDFInfo
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- KR100384640B1 KR100384640B1 KR10-1998-0054389A KR19980054389A KR100384640B1 KR 100384640 B1 KR100384640 B1 KR 100384640B1 KR 19980054389 A KR19980054389 A KR 19980054389A KR 100384640 B1 KR100384640 B1 KR 100384640B1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- 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
Abstract
본 발명은 슬래그를 이용한 산성토양 개량제 제조방법에 관한 것이며, 그 목적하는 바는 제강슬래그와 고로슬래그를 이용하여 적정수준의 화학조성을 갖도록함으로서, 토양에 규산질 성분을 보충할 뿐만아니라, 산성화되고 있는 농경지 토양과 산림토양을 토양이온(ion) 농도간의 균형을 교란시키지 않으면서 산성토양을 중화할 수 있고 중화효력이 지속적인 산성토양개량제의 제조방법을 제공하고자 하는데 있다.The present invention relates to a method for producing an acid soil improver using slag, and its purpose is to have an appropriate level of chemical composition by using steelmaking slag and blast furnace slag, as well as replenishing siliceous components in the soil, as well as acidifying agricultural land. The present invention aims to provide a method for preparing acid soil improvers that can neutralize acid soils without disturbing the balance between soil ion concentrations and soil soils.
상기 목적을 달성하기 위한 본 발명은 토양개량제를 제조하는 방법에 있어서, 제강슬래그를 파쇄하여 철성분을 선광하여 철 함량을 12%이하로 낮추고, 입도를 1.68mm이하로 제어하는 단계; 고로슬래그를 파쇄하여 입도를 1.68mm이하로 제어하는 단계; 및 상기 입도제어된 제강슬래그 70-80wt%와 상기 입도제어된 고로슬래그 20-30wt%를 혼합하는 단계;를 포함하는 슬래그를 이용한 토양개량제의 제조방법에 관한 것을 그 요지로 한다.In order to achieve the above object, the present invention provides a method for producing a soil improving agent, the step of crushing steel slag to beneficiate the iron component to lower the iron content to 12% or less, controlling the particle size to 1.68mm or less; Crushing the blast furnace slag to control the particle size to 1.68mm or less; And it relates to a method for producing a soil improver using a slag comprising the step of mixing the particle size controlled steelmaking slag 70-80wt% and the particle size controlled blast furnace slag 20-30wt%.
Description
본 발명은 산성화된 농경지, 산림토양 및 침출수 정화에 이용되는 산성토양개량제를 제조하는 방법에 관한 것으로, 보다 상세하게는 제강슬래그 및 고로슬래그를 이용하여 산성토양개량제를 제조하는 방법에 관한 것이다.The present invention relates to a method for producing an acid soil improver used for acidified farmland, forest soil and leachate purification, and more particularly, to a method for producing an acid soil improver using steelmaking slag and blast furnace slag.
우리나라 토양은 그 모재의 50% 이상이 화강암과 화강편마암이어서 여름철의 집중호우에 의한 토양유실과 아울러 Ca용탈과 암모니아성 질소비료 과다사용으로 인하여 토양산성화가 용이하며, 최근에는 산성강우의 빈도가 높아져 토양산성화가 가속화되고 있어 농업생산성과 산림수목생장이 크게 저하되는 결과를 초래하고 있다.More than 50% of the soils in Korea are granite and granitic gneiss. Soil loss due to heavy rains in summer and acidification is easy due to excessive use of Ca leaching and ammonia nitrogen fertilizers. Soil acidification is accelerating, resulting in a significant decline in agricultural productivity and forest growth.
산성토양을 중화하기 위하여 탄산석회(CaCO3)나 소석회(CaO)를 사용하고 있으나 과다한 석회사용은 Ca:Mg 비율을 저하시켜 마그네슘(Mg) 결핍을 초래하기 때문에 Mg 가 함유된 석회화합물 즉 백운석(CaMgCO3)을 사용하여야 한다. 그러나 백운석은 고가이며 농경지 토양개량제로서 생산되지도 않고 있어, 심각하게 산성화되고 있는 국내농경지 토양을 보다 효율적으로 개량할 수 있는 산성토양개량제가 없는 실정이다.Lime carbonate (CaCO 3 ) or hydrated lime (CaO) are used to neutralize acidic soils. However, excessive limestone reduces the Ca: Mg ratio and causes magnesium (Mg) deficiency. CaMgCO 3 ) should be used. However, dolomite is expensive and has not been produced as a farmland soil improver, and there is no acid soil improver that can more efficiently improve the severely acidified domestic farmland soil.
또한, 국내에는 규산함량 부족에 의한 저수확답(논)이 많은데 이러한 토양의 개량을 위하여 규산질비료를 사용한다.In addition, there are many low yield answers due to lack of silicic acid in Korea, and siliceous fertilizer is used to improve the soil.
이에 본 발명자들은 규산질 함량을 보충하면서 보다 효율적인 토양개량효과를 보이는토양산성개량제를 얻기 위해 연구와 실험을 거듭하고 그 결과에 근거하여 본 발명을 제안하게 된 것으로, 본 발명은 제강슬래그와 고로슬래그를 이용하여 적정수준의 화학조성을 갖도록함으로서, 토양에 규산성분을 보충해줄 뿐만아니라, 산성화되고 있는 농경지 토양과 산림토양을 토양이온(ion) 농도간의 균형을 교란시키지 않으면서 산성토양을 중화할 수 있고 중화효력이 지속적인 산성토양개량제의 제조방법을 제공하고자 하는데, 그 목적이 있다.Accordingly, the present inventors have repeatedly conducted research and experiments to obtain a soil acidic improving agent showing a more effective soil improvement effect while supplementing siliceous content, and the present invention proposes a steelmaking slag and blast furnace slag based on the results. By providing the appropriate chemical composition, the soil can be supplemented with silicic acid and neutralizes acidic soils without disturbing the balance between acidic agricultural soils and forest soils. The purpose of the present invention is to provide a method for preparing an acid soil improving agent having a continuous effect.
상기 목적을 달성하기 위한 본 발명은 토양개량제를 제조하는 방법에 있어서, 제강슬래그를 파쇄하여 철성분을 선광하여 철 함량을 12%이하로 낮추고, 입도를 1.68mm이하로 제어하는 단계; 고로슬래그를 파쇄하여 입도를 1.68mm이하로 제어하는 단계; 및 상기 입도제어된 제강슬래그 70-80wt%와 상기 입도제어된 고로슬래그 20-30wt%를 혼합하는 단계;를 포함하는 슬래그를 이용한 토양개량제의 제조방법에 관한 것이다.In order to achieve the above object, the present invention provides a method for producing a soil improving agent, the step of crushing steel slag to beneficiate the iron component to lower the iron content to 12% or less, controlling the particle size to 1.68mm or less; Crushing the blast furnace slag to control the particle size to 1.68mm or less; And mixing the particle size controlled steelmaking slag 70-80wt% and the particle size controlled blast furnace slag 20-30wt%.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에서는 제강슬래그를 파쇄하여 철성분을 선광하여 철 함량을 12%이하로 낮추고, 입도를 1.68mm이하로 제어한다.In the present invention, the steel slag is crushed to beneficiate the iron component to lower the iron content to 12% or less, the particle size is controlled to 1.68mm or less.
상기 제강슬래그는 제강과정에서 발생되는 일반적인 것을 사용할 수 있으며, 토양에 철성분의 해를 끼치지 않도록 철함량을 12%이하로 제어한다. 선광방법으로 통상적인 방법, 예를 들면 자력선광등을 통하여 행할 수 있다.The steelmaking slag may use a general one generated in the steelmaking process, and the iron content is controlled to 12% or less so as not to harm the iron component in the soil. The beneficiation method can be carried out by a conventional method such as magnetic beneficiation.
상기 제강슬래그는 그 입도를 1.68mm이하로 제어하는데, 통상 사용되는 비료의 규격과 유사한 것으로 토양에 흡수되어지는 속도를 고려한 것이다.The steelmaking slag is controlled to a particle size of less than 1.68mm, considering the rate of absorption into the soil, similar to the specifications of fertilizers commonly used.
본 발명에서는 고로슬래그를 파쇄하여 입도를 1.68mm이하로 제어한다.In the present invention, the blast furnace slag is crushed to control the particle size to 1.68mm or less.
상기 고로슬래그는 규산을 함유하고 있는 슬래그로서, 가용성 규산함량을 8.9∼12-14%정도로 높이기 위해 첨가된다. 또한, 입도는 1.68mm이하로 제어하는데, 토양에 흡수되어지는 속도를 고려한 것이다.The blast furnace slag is a slag containing silicic acid, which is added to increase the soluble silicic acid content to about 8.9 to 12-14%. In addition, the particle size is controlled to 1.68mm or less, taking into account the rate of absorption into the soil.
본 발명에서는 상기 입도제어된 제강슬래그 70-80wt%와 상기 입도제어된 고로슬래그 20-30wt%를 혼합한다.In the present invention, the particle size controlled steelmaking slag 70-80wt% and the particle size controlled blast furnace slag 20-30wt%.
상기 고로슬래그의 혼합량이 20%미만이면 토양개질제중에서 규산함량이 떨어져 원하는 규산함량을 얻기 힘들고, 30%를 초과하면 제강슬래그의 부족으로 석회성분이 낮아서 산성토양 개량의 효과가 미흡한 문제가 있다.If the mixing amount of the blast furnace slag is less than 20%, the silicic acid content in the soil modifier is difficult to obtain the desired silicic acid content, and if it exceeds 30%, the lime component is low due to the lack of steelmaking slag.
이와같은 본 발명을 다음에서는 일예를 들어 보다 상세히 설명한다. 단, 이는 설명의 편의를 위하여 일예를 들었을 뿐으로 본 발명이 여기에 한정되는 것은 아니다.In the following, the present invention will be described in more detail by way of example. However, this is only an example for convenience of description and the present invention is not limited thereto.
철강산업의 부산물인 제강슬래그를 파쇄한 후 500gauss의 자력을 이용하여 철을 회수하므로 철의 농도를 저하시키고 KSA 5101 12번 표준체(1680㎛)를 사용하여 농림부 고시 부산석회비료 공정규격의 분말도 요건을 맞춘 후, 제강슬래그와 동일 입경이 고로슬래그를 중량비로 20% 혼합하여 규산질 비료의 효과를 보이는 복합토양개량제를 제조하였다. 이때 제조된 산성토양개량제의 화학적 조성은 하기표 1과 같다.After crushing steel slag, a by-product of the steel industry, iron is recovered by using 500gauss of magnetic force, thereby reducing the iron concentration and using the KSA 5101 No. 12 standard (1680㎛). After aligning the blast furnace slag with the same particle diameter as steelmaking slag, 20% by weight of the mixed soil improver was produced. At this time, the chemical composition of the prepared acid soil improver is shown in Table 1 below.
상기 표1에서 보는 바와 같이 본 발명에 의한 토양개량제에 있어, Ca농도는 28.3%, Mg의 농도는 5.3% 로서 Ca:Mg 의 비는 5.3:1 로서 본 발명을 토양에서 사용하였을 때 Ca 과다에 의한 Mg의 결핍증은 유발되지 않는다. 또한, 본 발명에 의한 토양개량제는 유리 CaO(Free CaO)가 5-7% 함유되어 있어 화학적으로는 CaO 와 CaSiO3로 구성되어 있다. 따라서, 토양에 살포하였을 때에는 다음과 같은 두가지 반응이 일어난다.As shown in Table 1, in the soil improving agent according to the present invention, Ca concentration is 28.3%, Mg concentration is 5.3%, and Ca: Mg ratio is 5.3: 1. Mg deficiency is not caused. In addition, the soil improving agent according to the present invention contains 5-7% of free CaO (Free CaO) and is chemically composed of CaO and CaSiO 3 . Therefore, when sprayed on the soil, two reactions occur.
상기 화학식 1과 같은 반응은 반응속도가 빨라 산성토양중화 효과가 빠르게 진행되며, 이같은 반응후에는 CaSiO3성분이 산성토양에 있는 H+이온과 결합하여 H+이온을 제거하는데 이 반응은 서서히 진행된다. 즉 제강슬래그로 제조한 토양개량제는 일반 석회석과는 달리 속효성인 동시에 완효성 산성 토양 중화제의 특성을 가지고 있다.Reaction, such as Formula 1, the reaction rate is faster acid proceeds soil neutralizing effect quickly, after such a reaction is to remove H + ions combine with the CaSiO 3 components H + ions in the acid soil The reaction is slowly progress . In other words, unlike ordinary limestone, the soil improver made of steel slag has the characteristics of fast-acting and slow-acting acidic soil neutralizer.
이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
실시예Example
상기 표1과 같은 화학조성의 토양개량제를 산성토양에 살포한 후, 토양산도(pH) 증가 형태를 살펴보았고, 또한, 통상의 탄산석회를 산성토양에 살포한 후, 토양산도 증가 형태를 살펴보았다. 이 같은 산도변화의 결과를 구하여 하기 표2에 나타내었다.After spraying the soil-modifying agent of the chemical composition as shown in Table 1 on the acid soil, the soil acidity (pH) was observed to increase the form, and after spraying ordinary lime carbonate to the acid soil, the soil acidity was also examined. . The results of the acidity change are shown in Table 2 below.
상기 표2에서 알 수 있는 바와같이, 일반적으로 사용되는 탄산석회(CaCO3)는 살포 2일 후에는 토양산도 변화가 더 이상 일어나지 않으나 본 발명품의 경우에는 살포 2일 후에도 서서히 토양 pH 가 증가함을 알 수 있다.As can be seen in Table 2, the lime carbonate (CaCO 3 ) generally used does not change soil acidity after 2 days of spraying, but in the case of the present invention, soil pH gradually increases after 2 days of spraying. Able to know.
또한, 본 발명에 의한 토양개량제는 상기표 1의 화학조성에서 보는 바와같이, 철(Fe)이 많게는 12%가 함유되어 있어 철성분이 부족한 토양(특히 논의 추락답)에 살포했을 때에는 토양산도중화 뿐만 아니라 식물생장에 필요한 필수미량원소의 공급원이 되기도 한다. 본 발명에서는 약 13%의 가용성 규산(SiO2)이 함유되어 있어 벼생장에 필요한 규산질비료의 역할도 한다.In addition, as shown in the chemical composition of Table 1, the soil improving agent according to the present invention contains 12% of iron (Fe), and neutralizes soil acidity when sprayed on soils lacking iron (especially in the fall of rice). It is also a source of essential trace elements for plant growth. In the present invention, about 13% of soluble silicic acid (SiO 2 ) is contained, which also serves as a siliceous fertilizer required for rice growth.
본 발명에 의한 토양개량제를 현장(논과 밭)에 살포하고 토양개량효과와 수량증대효과를 조사하였다. 하기 표3과 표4는 각각 논과 밭토양이며 논에는 벼를 그리고 밭에는 콩을 재배하였다.The soil improver according to the present invention was applied to the field (paddy and field) and the soil improvement effect and yield increase effect were investigated. Table 3 and Table 4 are paddy fields and field soils, respectively, with rice and cultivated soybeans.
상기 표3 및 표4를 분석함으로서 다음과 같은 결과를 얻을 수 있었다.By analyzing Tables 3 and 4, the following results were obtained.
즉, 논의 경우 본 발명에 의한 토양개량제를 1ha 당 0, 4, 8, 12ton 과 대조구로서 탄산석회 2ton(권장비율)을 살포하였을 때, 토양개량제 살포구에서는 토양 pH 가 5.6에서 6.9까지 증가하였으나 탄산석회살포구의 토양산도는 6.0으로 증가하는데에 그쳤다. 벼의 수량은 1ha 당 8ton을 살포하였을 때 무살포구 또는 탄산석회 살포구보다 훨씬 높은 1ha 당 7.59ton 이 수확되었다. 이때에 토양개량효과를 보면 토양산도증진 뿐만 아니라 벼 생육에 필요한 Ca, Mg, Fe, SiO2농도도 크게 증가하였다.That is, in the case of discussion, when the soil improver according to the present invention was sprayed with 0, 4, 8, 12 ton / ha and 2 tons of lime carbonate (winding ratio) as a control, the soil pH increased from 5.6 to 6.9 in the soil improver sprayer. The soil acidity of lime sprays was only increased to 6.0. Rice yields of 8 tonnes per ha were harvested at 7.59 tonnes per ha, which is much higher than unsprayed or lime carbonate sprays. At this time, the soil improvement effect greatly increased Ca, Mg, Fe, SiO 2 concentrations required for rice growth as well as soil acidity.
밭의 경우에도 1ha 당 8ton의 토양개량제를 살포하였을 때 토양산도는 6.5에서 7.5 로 증가되었고 콩의 수량도 1ha 당 1.23ton 이 수확되어 무살포구에 비하여 36.7%의 수량증대효과를 나타내었다. 또한 토양조사결과 Ca 농도가 4.8me/100g에서 6.8me/100g 으로 크게 증가되었고 철(Fe) 성분도 약 2배 이상 증가되었다. 탄산석회 시용구에서는 토양의 산도가 약간 증가하였을 뿐 토양성분에는 개량효과가 없었다.In the case of the field, the soil acidity increased from 6.5 to 7.5 when 8 tons of soil modifiers were applied per ha, and the yield of soybeans was 1.23 tons per ha, yielding an increase of 36.7%. In addition, the soil concentration significantly increased the Ca concentration from 4.8me / 100g to 6.8me / 100g, and the iron (Fe) content increased more than twice. In the case of lime carbonate application, soil acidity was slightly increased, but there was no improvement effect on soil composition.
상기한 바에 의하면 본 발명에서 제조한 토양개량제는 산성토양중화효과가 속성이면서 또한 완효성으로 탁월하며 또한 토양개량제 살포는 농작물 생육에 필요한 Ca, Mg, Fe, Si, Mn 등의 공급원이 되기도 하여 수량증대 효과가 컸으며, 제철소 부산물인 제강슬래그 및 고로슬래그를 산성토양개량제로 이용하므로서 폐기물의 재활용에도 기여하는 효과가 있다.According to the above, the soil improving agent prepared in the present invention has an acidic soil neutralizing effect and is excellent in slowing down effect. Also, the soil improving agent spraying is a source of Ca, Mg, Fe, Si, Mn, etc. necessary for growing crops. The effect was great, and by using steelmaking by-products of steel mill and blast furnace slag as acidic soil improver, it contributes to the recycling of waste.
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| KR101320952B1 (en) | 2011-12-09 | 2013-10-28 | 오윤아 | Method for modifying the soil of desert |
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| KR100972394B1 (en) * | 2009-11-24 | 2010-07-27 | 주식회사 우일 이알에스 | Method for greening inclined clay containing high density salt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR870000773A (en) * | 1985-06-17 | 1987-02-20 | 김영수 | Method for producing positive electrode powder of alkaline battery |
| JPH06200249A (en) * | 1992-10-09 | 1994-07-19 | Mamoru Wakimura | Solidifying material containing stone powder and method of construction using solidifying material containing stone powder |
| JPH09100470A (en) * | 1995-08-03 | 1997-04-15 | Nippon Steel Corp | Hardening of soil |
| KR19990050167A (en) * | 1997-12-16 | 1999-07-05 | 이구택 | Manufacturing method of acid soil neutralizing material using converter slag |
| KR100276670B1 (en) * | 1997-10-14 | 2001-01-15 | 김재인 | Complex Soil Enhancer and Manufacturing Method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR870000773A (en) * | 1985-06-17 | 1987-02-20 | 김영수 | Method for producing positive electrode powder of alkaline battery |
| JPH06200249A (en) * | 1992-10-09 | 1994-07-19 | Mamoru Wakimura | Solidifying material containing stone powder and method of construction using solidifying material containing stone powder |
| JPH09100470A (en) * | 1995-08-03 | 1997-04-15 | Nippon Steel Corp | Hardening of soil |
| KR100276670B1 (en) * | 1997-10-14 | 2001-01-15 | 김재인 | Complex Soil Enhancer and Manufacturing Method |
| KR19990050167A (en) * | 1997-12-16 | 1999-07-05 | 이구택 | Manufacturing method of acid soil neutralizing material using converter slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101320952B1 (en) | 2011-12-09 | 2013-10-28 | 오윤아 | Method for modifying the soil of desert |
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