KR20040023437A - Manufacture Method of Aragonite Calcium Carbonate Using Dusts from a Stainless Steel Refining - Google Patents

Manufacture Method of Aragonite Calcium Carbonate Using Dusts from a Stainless Steel Refining Download PDF

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KR20040023437A
KR20040023437A KR1020020055162A KR20020055162A KR20040023437A KR 20040023437 A KR20040023437 A KR 20040023437A KR 1020020055162 A KR1020020055162 A KR 1020020055162A KR 20020055162 A KR20020055162 A KR 20020055162A KR 20040023437 A KR20040023437 A KR 20040023437A
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dust
calcium hydroxide
calcium carbonate
refining process
aragonite
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KR1020020055162A
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Korean (ko)
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KR100492620B1 (en
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안지환
김형석
주성민
박삼식
김환
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한국지질자원연구원
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/18—Carbonates
    • C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
    • 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
    • Y02W30/20—Waste processing or separation
    • 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
    • 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
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE: Provided is a preparation method of aragonite-type calcium carbonate through a carbonation process by reacting CO2 gas with dust generated from a stainless steel refining process. The resultant aragonite(CaCO3) is applied to high functional materials requiring mechanical strength and optical property. CONSTITUTION: The aragonite-type calcium carbonate is prepared by the following steps of: preprocessing dust generated from stainless steel refining process through sieving, gravity separating, magnetic separating, filtering and drying; preparing Ca(OH)2 slurry by adding dust containing 1-15wt.% of Ca(OH)2 to 2L of Mg(Cl)2 solution containing 0.1-1.0M of Mg(Cl)2 in a glass reactor; flowing high purity CO2 gas at a rate of 0.1-1.0L/min between 40 and 80deg.C into the reactor with stirring for carbonation of Ca(OH)2 sludge; washing, filtering and drying.

Description

스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조 방법{Manufacture Method of Aragonite Calcium Carbonate Using Dusts from a Stainless Steel Refining}Manufacturing Method of Aragonite Calcium Carbonate Using Dusts from a Stainless Steel Refining}

본 발명은 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘제조방법에 관한 것으로서 보다 상세하게로는, 스테인레스 정련공정에서 발생되는 분진에 전처리 작업을 수행한 후 이에 염화마그네슘 용액을 첨가하여 슬러리로 제조하고, 여기에 탄산가스를 주입하는 탄산화 방법을 이용하여 고기능성 및 고부가가치의 아라고나이트형 탄산칼슘을 제조함으로써 폐자원을 재활용 하도록 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법에 관한 것이다.The present invention relates to a method for producing aragonite type calcium carbonate using dust of a stainless refining process, and more specifically, to pre-treatment to dust generated in a stainless refining process, and then to add a magnesium chloride solution to prepare a slurry And a method for producing aragonite calcium carbonate using dust of a stainless refining process to recycle waste resources by producing a high functional and high value-added aragonite calcium carbonate using a carbonation method of injecting carbon dioxide gas. will be.

일반적으로 침강성 탄산칼슘은, 그 제조방법 및 조건에 따라 다양한 형태 및 크기의 분체로 제조함으로써 다른 무기분체로도 대용할 수 있다.Generally, precipitated calcium carbonate can be substituted with other inorganic powders by preparing powders of various shapes and sizes according to the production method and conditions thereof.

특히, 침강성 탄산칼슘의 다형체 중 아라고나이트형 탄산칼슘은 열역학적으로 준안정상으로 존재하기 때문에 합성이 어려움에도 불구하고 장경비가 매우 큰 침상형상으로 기계적 강도와 광학적 기능을 요구하는 재료에 사용하면 역학적 특성이 증대되어 고기능성의 소재로 사용될 수 있다.In particular, aragonite type calcium carbonate, among the polymorphs of precipitated calcium carbonate, is thermodynamically metastable, and despite its difficulty in synthesis, it is an acicular shape with a very high long-ratio ratio. Increased properties can be used as a highly functional material.

또한, 상기와 같은 탄산칼슘은 가격이 낮고 고백색도, 불활성 및 불연성 등의 우수한 특성을 가진 재료로써 제지, 플라스틱, 페인트 및 고무 등에 충전제나 증량제로 사용되고 있다.In addition, the calcium carbonate as described above is a material having a low price and excellent characteristics such as high whiteness, inertness and non-combustibility, and is used as a filler or extender in paper, plastic, paint, and rubber.

특히, 제지산업에서 탄산칼슘은 종이의 강도나 백색도에 큰 영향을 미치기 때문에 그 사용량이 증대하고 있으며, 탄산칼슘의 다형중에서 침상의 형태를 가진 아라고나이트는 종이의 백색도를 증진시는 재료로 주목을 받고 있다.In particular, in the paper industry, calcium carbonate has an increasing effect on the strength and whiteness of paper, and its usage is increasing. Aragonite, which has a needle shape in the polycarbonate form of calcium carbonate, is drawing attention as a material that enhances the whiteness of paper. I am getting it.

상기와 같은 아라고나이트는, 칼사이트에 비해 고온의 영역에서 보다 큰 결정화속도로 인해 반응온도 60∼80℃ 이상에서 아라고나이트가 석출되며, 반응용액의 pH나 첨가 이온, 수산화칼슘의 농도 등의 영향에 의해 보다 낮은 온도에서도 합성이 가능하다.As described above, aragonite is precipitated at a reaction temperature of 60 to 80 ° C. or higher due to a larger crystallization rate in a higher temperature region than that of calcite, and affects the pH of the reaction solution, addition ions, and concentration of calcium hydroxide. This allows synthesis at lower temperatures.

또한, 현재 포항제철에서 스테인레스 정련공정 부원료로서 발생되는 분진은 약 2160톤/년 정도에 달하고 있으며, 상기 분진에는 많은 양의 산화칼슘 성분이 함유되어 있기 때문에 이를 재활용할수 있는 기술의 개발이 요구되는 실정이다.In addition, dust generated as an auxiliary raw material for stainless refining process in Pohang Iron and Steel currently reaches about 2160 tons / year, and since the dust contains a large amount of calcium oxide, it is required to develop a technology for recycling it. to be.

본 발명의 목적은, 간단하고 경제적이며, 안정적이고 재현성있는 탄산화 방법을 제공하도록 하고, 스테인레스 정련공정 부원료인 분진을 재활용하도록 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법을 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing aragonite calcium carbonate using dust of a stainless refining process to provide a simple, economical, stable and reproducible carbonation method, and to recycle dust, which is a raw material of a stainless refining process. .

또한, 본 발명은 염화마그네슘의 재사용 및 기존의 수용액 공정인 산성공법보다 상업화가 용이한 경제적인 공법인 탄산화 반응을 이용하여 고기능성 및 고부가가치의 아라고나이트형 탄산칼슘을 제조하도록 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법을 제공하는데 있다.In addition, the present invention is a dust of the stainless refining process to produce a high-functional and high value-added aragonite calcium carbonate using a carbonation reaction, an economical process that is easier to commercialize than the acidic method of reuse of magnesium chloride and the conventional aqueous solution process It is to provide a method for producing aragonite calcium carbonate using.

도1은 본 발명에 따른 아라고나이트형 탄산칼슘의 제조장치를 도시한 사시도1 is a perspective view showing an apparatus for producing aragonite calcium carbonate according to the present invention

도2는 본 발명에 따른 아라고나이트형 탄산칼슘의 제조공정을 도시한 블록도Figure 2 is a block diagram showing the manufacturing process of aragonite calcium carbonate according to the present invention

도3은 본 발명에 따라 제조된 아라고나이트형 탄산칼슘의 반응온도 80℃에서의 X선 회절도Figure 3 is an X-ray diffraction diagram at a reaction temperature of 80 ℃ of aragonite calcium carbonate prepared according to the present invention

도4는 본 발명의 탄산가스 유량에 따른 아라고나이트형 탄산칼슘의 전자현미경 사진Figure 4 is an electron micrograph of the aragonite calcium carbonate according to the carbon dioxide gas flow rate of the present invention

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1...반응기 2...항온수조1 ... reactor 2 ... thermal bath

3...가스방출구 6...온도계3 ... gas outlet 6 ... thermometer

7...교반기 8...탄산가스용기7.Agitator 8 ... Carbon gas container

상기한 바와같은 목적을 달성하고 위해, 스테인레스 정련공정 슬러지의 부원료인 분진에 전처리 작업을 수행하고, 염화마그네슘이 함유된 수용액에 수산화칼슘을 갖는 분진을 첨가하며, 이를 교반시키면서 탄산화 반응을 수행하도록 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법이 제공된다.In order to achieve the object as described above, the pretreatment operation is performed on the dust, which is a subsidiary material of the stainless refining process sludge, and the magnesium having the calcium hydroxide is added to the aqueous solution containing magnesium chloride, and the carbonization reaction is carried out with stirring. A method for producing aragonite calcium carbonate using dust in a refining process is provided.

한편, 항온수조에 내장되면서 수산화칼슘 현탁액이 내측에 충진되는 반응기와, 상기 반응기 내의 pH및 온도를 측정하기 위하여 반응기에 각각 연결되는 pH 전극및 온도계와, 상기 반응액을 교반시키도록 반응기의 상부에 연결되는 교반기및, 상기 수산화칼슘 현탁액에 탄산가스를 공급하도록 가스방출구가 연결되는 탄산가스 저장조를 포함하는 구성으로 이루어진 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조장치가 제공된다.On the other hand, the reactor is built in a constant temperature water tank and the calcium hydroxide suspension is filled inside, a pH electrode and a thermometer connected to the reactor to measure the pH and temperature in the reactor, respectively, and connected to the top of the reactor to stir the reaction solution There is provided an agonite calcium carbonate production apparatus using dust in the stainless refining process consisting of a stirrer and a carbon dioxide storage tank connected to a gas outlet to supply carbon dioxide gas to the calcium hydroxide suspension.

이하, 첨부된 도면에 의거하여 본 발명의 실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 도 1에서와 같이, 길이 300㎜, 직경 150㎜, 용량 1ℓ의 내열유리로서 반응기(1)를 제작하여 사용하였으며, 반응기(1)의 외부에 자켓으로 하여 항온수조(2)의 내측에 연결한다.In the present invention, the reactor 1 was manufactured and used as a heat-resistant glass having a length of 300 mm, a diameter of 150 mm, and a capacity of 1 L, and a jacket on the outside of the reactor 1 to the inside of the constant temperature water tank 2. Connect to

또한, 상기 항온수조(2)는, 반응기(1)의 내측에 투입되는 수산화칼슘 현탁액의 온도를 조절하기 위하여 장착하였으며, 상기 반응기(1)의 내측에 투입되는 수산화칼슘 현탁액의 pH 변화와 반응온도를 측정하기 위하여 pH 측정기(5) 및 온도계(6)가 반응기(1)의 내부에 설치된다.In addition, the constant temperature water tank (2) was mounted to control the temperature of the calcium hydroxide suspension introduced into the reactor (1), and measures the pH change and reaction temperature of the calcium hydroxide suspension introduced into the reactor (1). To this end, a pH meter 5 and a thermometer 6 are installed inside the reactor 1.

더하여, 상기 pH 측정기(5)는 온도계(6)가 되결되면서 반응기(1) 내측의 수산화칼슘 현탁액에 투입되는 pH전극(4)과 연결된다.In addition, the pH meter 5 is connected to the pH electrode 4 which is introduced into the calcium hydroxide suspension inside the reactor 1 while the thermometer 6 is turned on.

그리고, 현탁액은 증류수에 분산시켜 제조하였으며, 상기 반응기(1)의 내측에 설치되는 교반기(7)로 충분히 교반한 뒤 탄산화 반응을 시켰다.In addition, the suspension was prepared by dispersing in distilled water and sufficiently stirred with a stirrer (7) installed inside the reactor (1) and then subjected to a carbonation reaction.

한편, 상기 탄산화 반응에 사용된 탄산가스는 탄산가스용(8)에 저장되는 99.9중량%의 고순도 가스를 사용하였으며, 상기 탄산가스는 가스방출구(3)를 통하여 수산화칼슘 현탁액 내에 투입되고, 상기의 탄산화 탄응후 시료를 채취하여 여과 및 건조시킨 후에 X선 회절분석 및 전자현미경 분석을 통하여 조사하였다.On the other hand, the carbon dioxide gas used in the carbonation reaction was used 99.9% by weight of a high purity gas stored in the carbon dioxide gas 8, the carbon dioxide gas is introduced into the calcium hydroxide suspension through the gas outlet (3), After carbonization and coagulation, samples were collected, filtered and dried, and examined by X-ray diffraction analysis and electron microscope analysis.

한편, 스테인레스 정련공정에서 배출되는 슬러지중의 부원료인 분진에 습식사분, 중력선별및 자력선별등의 전처리 공정을 수행하여 수산화칼슘을 갖는 분진을 제조한다.Meanwhile, dust having calcium hydroxide is prepared by performing pretreatment processes such as wet dust, gravity screening, and magnetic screening on dust, which is an auxiliary material in the sludge discharged from the stainless refining process.

이때, 상기 분진의 내측에는 전처리 공정을 통하여 1.0~15.0 중량%의 수산화칼슘이 포함된다.At this time, the inside of the dust contains 1.0 ~ 15.0% by weight of calcium hydroxide through a pretreatment process.

그리고, 상기 수산화칼슘이 포함되는 분진에 염화마그네슘이 함유된 수용액을 첨가하여 수산화칼슘 슬러리를 형성한다.In addition, an aqueous solution containing magnesium chloride is added to the dust containing calcium hydroxide to form a calcium hydroxide slurry.

이때, 1.0~15.0 중량%의 수산화칼슘이 포함되는 분진에 0.1∼1.0몰 염화마그네슘이 함유된 2ℓ의 수용액을 섞어 슬러리 상태로 만든다.At this time, the powder containing 1.0 to 15.0% by weight of calcium hydroxide is mixed with 2L aqueous solution containing 0.1 to 1.0 mol magnesium chloride to make a slurry state.

계속하여, 상기 수산화칼슘슬러지를 교반시키면서 탄산가스를 주입하여 탄산화 반응을 수행한다.Subsequently, carbonic acid gas is injected while stirring the calcium hydroxide sludge to perform a carbonation reaction.

상기와 같은 탄산화 반응은, 반응온도 40~80℃에서 탄산가스의 유량을 0.1∼1.0ℓ/분 속도로 불어넣으면서 수행한다.The carbonation reaction as described above is performed while blowing the flow rate of carbon dioxide gas at a reaction temperature of 40 to 80 ° C. at a rate of 0.1 to 1.0 L / min.

더하여, 상기와 같이 탄산화 반응이 완료된 원료를 세척및 여과하여 건조시킴으로써 아라고나이트형 탄산칼슘을 제조한다.In addition, aragonite type calcium carbonate is prepared by washing, filtering and drying the raw material having completed the carbonation reaction as described above.

상기와 같은 제조방법에 의한 본 발명의 실시예를 설명한다.An embodiment of the present invention by the manufacturing method as described above will be described.

[실시예 1]Example 1

0.375몰의 염화마그네슘이 함유된 2ℓ의 수용액에 2.5중량% 수산화칼슘을 갖는 분진을 첨가하여 수산화칼슘 슬러리를 교반시키면서 반응온도 80℃에서 탄산가스 유량을 0.1∼1.0ℓ/분의 속도로 하여 탄산화 반응을 수행하였다.The carbonation reaction was performed at a reaction temperature of 80 ° C. at a rate of 0.1 to 1.0 l / min while stirring the calcium hydroxide slurry by adding dust having 2.5 wt% calcium hydroxide to 2 l aqueous solution containing 0.375 mol of magnesium chloride. It was.

그 결과, 도3의 아라고나이트형 탄산칼슘의 반응온도 80℃에서의 X선 회절도에서와 같이, 탄산화 반응후에 생성된 아라고나이트형 탄산칼슘의 X선 회절분석으로 탄산가스 유량이 1.0ℓ/분 일 경우 마그네슘-칼사이트가 주로 생성되었으며, 탄산가스 유량이 0.1 및 0.5ℓ/분 일 경우 마그네슘-칼사이트 및 아라고나이트가 생성되었다.As a result, as shown in the X-ray diffraction diagram at the reaction temperature of 80 ° C. of the aragonite-type calcium carbonate of FIG. 3, the flow rate of the carbon dioxide gas was 1.0 L / min by X-ray diffraction analysis of the aragonite-type calcium carbonate produced after the carbonation reaction. In the case of magnesium-calcite mainly produced, and the carbon dioxide gas flow rate of 0.1 and 0.5L / min produced magnesium-calcite and aragonite.

[실시예 2]Example 2

0.375몰의 염화마그네슘이 함유된 2ℓ의 수용액에 2.5중량% 수산화칼슘을 갖는 분진을 첨가하여 수산화칼슘 슬러리를 교반시키면서 반응온도 80℃에서 탄산가스 유량을 0.1∼1.0ℓ/분으로 탄산화 반응시켰다.To 2 L aqueous solution containing 0.375 mol of magnesium chloride was added dust having 2.5% by weight calcium hydroxide, and the carbon dioxide gas was carbonated at a reaction temperature of 80 DEG C at 0.1 to 1.0 L / min while stirring the calcium hydroxide slurry.

그 결과, 도4의 탄산가스 유량에 따른 아라고나이트형 탄산칼슘의 전자현미경 사진에서와 같이 탄산화 반응후에 생성된 아라고나이트형 탄산칼슘의 전자현미경 사진으로 탄산가스 유량이 비교적 높은 1.0ℓ/분에서는 침상형의 아라고나이트와 미세한 구형의 마그네슘-칼사이트가 존재하였다.As a result, as shown in the electron micrograph of the aragonite calcium carbonate according to the carbon dioxide gas flow rate in Fig. 4, the electron microscope photograph of the aragonite calcium carbonate produced after the carbonation reaction was couched at 1.0 L / min. Types of aragonite and fine spherical magnesium-calcite were present.

그리고, 상기 탄산가스 유량이 0.5ℓ/분 인 경우에는 다량의 침상형의 아라고나이트와 미량의 마그네슘-칼사이트가 생성되었다.When the carbon dioxide gas flow rate was 0.5 L / min, a large amount of needle-shaped aragonite and a small amount of magnesium-calcite were produced.

또한, 상기 탄산가스 유량이 0.1ℓ/분 인 경우에는 마그네슘-칼사이트가 극소량 존재하였으며, 대부분은 침상형 아라고나이트가 생성되었는데, 탄산가스 유량이 느릴수록 장경비가 커짐을 확인하였다.In addition, when the carbonic acid gas flow rate is 0.1 L / min, a very small amount of magnesium-calcite was present, most of the needle-shaped aragonite was produced, the longer the carbon dioxide gas flow rate was confirmed that the longer the ratio.

상기와 같이 본 발명에 의하면, 간단하고 경제적이며, 안정적이고 재현성있는 탄산화 방법을 제공하고, 스테인레스 정련공정 부원료인 분진을 재활용한다.According to the present invention as described above, a simple, economical, stable and reproducible carbonation method is provided, and dust, which is a raw material for the stainless refining process, is recycled.

또한, 염화마그네슘의 재사용 및 기존의 수용액 공정인 산성공법보다 상업화가 용이한 경제적인 공법인 탄산화 반응을 이용하여 고기능성 및 고부가가치의 아라고나이트형 탄산칼슘을 제조하는 것이다.In addition, a high functional and high value-added aragonite-type calcium carbonate is prepared using a carbonation reaction, which is an economical method that is easier to commercialize than the acidic method of reuse of magnesium chloride and an aqueous solution process.

본 발명은 특정한 실시예에 관련하여 도시하고 설명 하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 정신이나 분야를 벗어나지 않는 한도내에서 본 발명이 다양하게 개량 및 변화될수 있다는 것을 당업계에서 통상의 지식을 가진자는 용이하게 알수 있음을 밝혀 두고자 한다.While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as provided by the following claims. I would like to clarify that those who have knowledge of this can easily know.

Claims (5)

항온수조(2)에 내장되면서 수산화칼슘 현탁액이 내측에 충진되는 반응기(1)와, 상기 반응기(1) 내의 pH및 온도를 측정하기 위하여 반응기(1)에 각각 연결되는 pH 전극(6)및 온도계(4)와, 상기 반응액을 교반시키도록 반응기(1)의 상부에 연결되는 교반기(7)및, 상기 수산화칼슘 현탁액에 탄산가스를 공급하도록 가스방출구(3)가 연결되는 탄산가스 저장조(8)를 포함하는 구성으로 이루어진 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조장치A reactor (1) embedded in the constant temperature water tank (2) and filled with a calcium hydroxide suspension therein; a pH electrode (6) and a thermometer (connected to the reactor (1), respectively) for measuring pH and temperature in the reactor (1); 4), a stirrer 7 connected to the upper portion of the reactor 1 to agitate the reaction solution, and a carbon dioxide storage tank 8 to which a gas outlet 3 is connected to supply carbon dioxide gas to the calcium hydroxide suspension. Aragonite type calcium carbonate production apparatus using dust of the stainless refining process consisting of a configuration comprising a 스테인레스 정련공정에서 배출되는 슬러지의 부원료인 분진에 전처리를 수행하는 단계;Performing pretreatment on dust, which is an auxiliary material of the sludge discharged from the stainless refining process; 염화마그네슘이 함유된 수용액에 수산화칼슘을 갖는 분진을 첨가하여 수산화칼슘 슬러리를 형성하는 단계;Adding a powder having calcium hydroxide to an aqueous solution containing magnesium chloride to form a calcium hydroxide slurry; 상기 수산화칼슘슬러지를 교반시키면서 탄산가스를 주입하는 탄산화 반응을 수행하는 단계;및,Performing a carbonation reaction for injecting carbon dioxide while stirring the calcium hydroxide sludge; and 탄산화 반응이 완료된 원료를 세척및 여과하여 건조시키는 단계를 포함하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법.A method for producing aragonite calcium carbonate using dust of a stainless refining process comprising the step of washing and filtering the raw material of the carbonation reaction is completed. 제 2항에 있어서, 상기 스테인레스 정련공정에서 배출되는 슬러지의 부원료인 분진에 전처리를 수행하는 단계는, 분진에 습식사분, 중력선별및 자력선별등을수행하여 수산화칼슘을 갖는 분진을 얻는 것을 특징으로 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법.The method of claim 2, wherein the pre-treatment of the dust, which is an auxiliary material of the sludge discharged from the stainless refining process, involves performing wet meal, gravity screening, and magnetic screening on the dust to obtain dust having calcium hydroxide. A method for producing aragonite calcium carbonate using dust of a stainless refining process. 제 2항에 있어서, 상기 염화마그네슘이 함유된 수용액에 수산화칼슘을 갖는 분진을 첨가하여 수산화칼슘 슬러리를 형성하는 단계는, 0.1∼1.0몰 염화마그네슘이 함유된 2ℓ의 수용액에 1.0~15.0 중량%의 수산화칼슘을 갖는 분진이 첨가되는 것을 특징으로 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법.The method of claim 2, wherein the step of forming a calcium hydroxide slurry by adding dust having calcium hydroxide to the aqueous solution containing magnesium chloride, 1.0 to 15.0% by weight of calcium hydroxide in 2L aqueous solution containing 0.1 to 1.0 mol magnesium chloride A method for producing aragonite calcium carbonate using dust of a stainless refining process, characterized in that dust having is added. 제 2항에 있어서, 상기 수산화칼슘슬러지를 교반시키면서 탄산가스를 주입하는 탄산화 반응을 수행하는 단계는, 반응온도 40~80℃에서 탄산가스의 유량을 0.1∼1.0ℓ/분 속도로 공급하는 것을 특징으로 하는 스테인레스 정련공정의 분진을 이용한 아라고나이트형 탄산칼슘 제조방법.According to claim 2, wherein the step of performing a carbonation reaction injecting carbon dioxide gas while stirring the calcium hydroxide sludge, characterized in that for supplying a flow rate of carbon dioxide gas at a reaction temperature of 40 ~ 80 ℃ at a rate of 0.1 ~ 1.0l / min A method for producing aragonite calcium carbonate using dust of a stainless refining process.
KR10-2002-0055162A 2002-09-11 2002-09-11 Manufacture Method of Aragonite Calcium Carbonate Using Dusts from a Stainless Steel Refining KR100492620B1 (en)

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