KR101462369B1 - Mg(oh)_2 manufacturing method - Google Patents

Mg(oh)_2 manufacturing method Download PDF

Info

Publication number
KR101462369B1
KR101462369B1 KR1020140041755A KR20140041755A KR101462369B1 KR 101462369 B1 KR101462369 B1 KR 101462369B1 KR 1020140041755 A KR1020140041755 A KR 1020140041755A KR 20140041755 A KR20140041755 A KR 20140041755A KR 101462369 B1 KR101462369 B1 KR 101462369B1
Authority
KR
South Korea
Prior art keywords
water
magnesium hydroxide
magnesium oxide
magnesium
magnesite
Prior art date
Application number
KR1020140041755A
Other languages
Korean (ko)
Inventor
허재수
Original Assignee
허재수
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52290435&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR101462369(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 허재수 filed Critical 허재수
Priority to KR1020140041755A priority Critical patent/KR101462369B1/en
Application granted granted Critical
Publication of KR101462369B1 publication Critical patent/KR101462369B1/en

Links

Classifications

    • 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
    • C01F5/00—Compounds of magnesium
    • C01F5/14—Magnesium hydroxide
    • C01F5/16—Magnesium hydroxide by treating magnesia, e.g. calcined dolomite, with water or solutions of salts not containing magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The present invention relates to a method for producing magnesium hydroxide for neutralizing wastewater and removing sulfur oxides, wherein magnesium hydroxide is produced through magnesite. The method comprises: a cooling step of plasticizing magnesite and producing magnesium oxide in order to be cooled at 25-300°C; and a water mixing step of mixing and agitating magnesium oxide cooled in the cooling step in order to be produced into dry magnesium hydroxide. In particular, in the water mixing step, 60-85 wt% of magnesium oxide is mixed with 15-40 wt% of water, and water is sprayed while the magnesium oxide is agitated, so that mass-type magnesium oxide is self-differentiated by means of residual heat while water is sprayed. In the present invention, the mass-type magnesium oxide self-differentiated using the residual heat of the magnesium oxide is produced by plasticizing magnesite, so that dry magnesium hydroxide is produced. Accordingly, an existing magnesium oxide pulverizing step can be skipped, and time taken to finely pulverize the self-differentiated magnesium hydroxide can be reduced, so that production costs can be reduced. Moreover, the dry magnesium hydroxide can be imported or transported from a long distance after being conveniently packed. An enterprise using the magnesium hydroxide does not have to prepare a separate production facility, and powered magnesium hydroxide can be intactly used after being mixed with water.

Description

폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법{Mg(OH)₂ MANUFACTURING METHOD}Technical Field [0001] The present invention relates to a method for producing magnesium hydroxide for neutralization of wastewater and for removal of sulfur oxides (Mg (OH) ₂ MANUFACTURING METHOD)

본 발명은 우리나라 화학공장에서 발생하는 황산 함유 폐수 및 황산화물(SOx) 가스를 제거하기 위해 사용하는 수산화마그네슘 제조방법에 관한 것으로서, 더욱 상세하게는 수산화마그네슘을 간단하면서 용이하게 제조하여 생산비용을 획기적으로 절감할 수 있도록 하는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법에 관한 것이다.The present invention relates to a process for producing magnesium hydroxide used for removing sulfuric acid-containing wastewater and sulfur oxide (SOx) gas generated in a chemical plant in Korea, and more particularly, to a process for producing magnesium hydroxide by simply and easily producing magnesium hydroxide And to a process for producing magnesium hydroxide for neutralization of sulfuric acid and removal of sulfur oxides.

현재 우리나라에서 연간 수만톤의 산화마그네슘(MgO)를 수입하고 있으며, 상기 산화마그네슘을 수산화마그네슘으로 생산하기 위해서 이를 생산하기 위한 설비를 갖추어서 운영해야 하므로 비효율적이었다.Currently, the company imports tens of thousands of tons of magnesium oxide (MgO) per year in Korea, and it is inefficient because it needs to be equipped with facilities for producing magnesium oxide as magnesium hydroxide.

그리고 현재 산업 현장에서는 광산에서 채광된 마그네사이트(MgCO3)를 산화마그네슘(MgO)으로 만들기 위하여, 소성로에 마그네사이트와 함께 무연탄을 투입하여 900℃ 이상으로 소성한 후, 소성된 마그네사이트를 냉각하고, 냉각된 마그네사이트를 분쇄하여 분말화하고, 분말화된 마그네사이트를 물과 혼합하여 4시간 이상 수화 숙성시키고, 이를 다시 습식 분쇄하는 것이다.In order to make magnesite (MgCO 3 ) mined in a mine from magnesium oxide (MgO) in the present industrial field, anthracite coal is added to the calcining furnace together with magnesite and calcined at 900 ° C. or higher. The calcined magnesite is cooled, The magnesite is pulverized and pulverized, and the pulverized magnesite is mixed with water, hydrolyzed for 4 hours or more, and wet pulverized again.

그리고 최근에는 상기와 같은 기술을 개선하기 위하여, 본 출원인에 의해 발명된 기술이 개발되어 특허출원 제10-2014-0001953호 출원되어 있다.In recent years, in order to improve the above-described technology, a technique invented by the present applicant has been developed and filed patent application No. 10-2014-0001953.

그러나 상기와 같은 종래 기술은 마그네사이트를 소성한 후에 분쇄하고 이를 물과 혼합 수화하여 습식 분쇄하기 때문에, 분쇄 과정이 많아 생산 시간과 비용이 많이 소요된다는 단점이 있다.However, in the conventional art as described above, grinding is performed after firing the magnesite, and the wet grinding is performed by mixing and hydrating the magnesite with water. Therefore, there is a disadvantage in that a lot of grinding processes are required and thus a long production time and cost are required.

특히 종래에는 소성된 마그네사이트를 분쇄하여 생산된 산화마그네슘을 수입하거나 원거리에서 운반하게 되면 이를 수산화마그네슘으로 제조하기 위한 설비를 갖추어야 하므로 생산 비용을 상승시키게 되며, 수화된 수산화마그네슘을 수입하거나 원거리에서 운반하게 되면 습식 상태의 수산화마그네슘을 포장 운반하기가 매우 불편하다는 단점이 있다.Particularly, conventionally, when magnesium oxide produced by pulverizing fired magnesite is imported or transported at a distance, it must be equipped with a facility for producing magnesium hydroxide, so that the production cost is increased, and the hydrated magnesium hydroxide is imported or transported at a long distance There is a disadvantage that it is very inconvenient to transport the magnesium hydroxide in a wet state.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 마그네사이트를 소성한 후에 그 현장에서 건식 수산화마그네슘을 제조함으로써 수산화마그네슘을 간단하면서 용이하게 제조하여 생산비용을 획기적으로 절감할 수 있는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법을 제공하는 데 있다.DISCLOSURE Technical Problem The present invention has been conceived to solve the problems of the prior art as described above, and it is an object of the present invention to provide a process for producing magnesium hydroxide by simply producing magnesium hydroxide by calcining magnesite at the site, And a method for producing magnesium hydroxide for neutralization of sulfuric acid and neutralization of waste water.

상기와 같은 목적을 달성하기 위하여, 본 발명은 마그네사이트로 수산화마그네슘을 제조하는 것으로 이루어지는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법에 있어서, 마그네사이트를 소성하여 산화마그네슘을 제조한 후에 25 ~ 300℃로 냉각하는 냉각단계; 그리고 상기 냉각단계에서 냉각된 산화마그네슘에 물을 혼합 교반하여 건식 수산화마그네슘으로 제조하는 물혼합단계로 이루어지는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법을 제공한다.In order to achieve the above object, the present invention provides a process for producing magnesium hydroxide for neutralization of wastewater and removal of sulfur oxides, which comprises producing magnesium hydroxide with magnesite, wherein magnesium is calcined to produce magnesium oxide, Cooling step; And water mixing step in which water is mixed and stirred with the magnesium oxide cooled in the cooling step to form dry magnesium hydroxide, and a method for producing magnesium hydroxide for neutralizing wastewater and removing sulfur oxides.

더우기 상기 물혼합단계에서는 산화마그네슘 60 ~ 85 중량%에 물 15 ~ 40 중량%를 혼합하되, 산화마그네슘을 교반하면서 물을 분사하여 덩어리 형태의 산화마그네슘이 물의 분사 과정에서 잔열로 인하여 자체적으로 수화되면서 분화되는 것을 특징으로 한다.Further, in the water mixing step, water is sprayed while mixing magnesium oxide with 60 to 85% by weight of water and 15 to 40% by weight of water, and the massive magnesium oxide is hydrated by itself due to the residual heat in the water spraying process And is differentiated.

또한 상기 물혼합단계에서 제조된 건식 수산화마그네슘을 건식 분쇄하여 분말 형태의 수산화마그네슘으로 형성하게 된다.In addition, the dry magnesium hydroxide produced in the water mixing step is dry-pulverized to form powdered magnesium hydroxide.

이와 같이 이루어지는 본 발명에 의한 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법은 마그네사이트를 소성하여 제조된 산화마그네슘의 잔열을 이용하여 덩어리 형태의 산화마그네슘을 물로써 자체 분화되도록 하여 건식 수산화마그네슘을 제조하기 때문에, 종래의 산화마그네슘의 분쇄 과정을 생략할 수 있을 뿐만 아니라 자체 분화된 수산화마그네슘을 정밀 분쇄 시간을 단축할 수 있어 생산 비용을 용이하게 절감할 수 있다는 이점이 있다.The method for producing magnesium hydroxide for neutralizing wastewater and removing sulfur oxides according to the present invention is characterized in that magnesium oxide is massivated in bulk by using the residual heat of the magnesium oxide produced by firing the magnesium to make dry magnesium hydroxide Therefore, it is possible to omit the conventional milling process of magnesium oxide, and it is possible to shorten the precision milling time of the self-differentiating magnesium hydroxide, thereby making it possible to easily reduce the production cost.

또한 건식 상태의 수산화마그네슘을 수입하거나 원거리에서 운반할 수 있어 포장 및 운반이 편리하게 되며, 수산화마그네슘을 사용하는 업체에서는 별도의 생산 설비를 갖출 필요가 없이 분말화된 수산화마그네슘에 물과 혼합하여 그대로 사용할 수 있는 것이다.In addition, magnesium hydroxide in dry state can be imported or transported from a distance, so that it can be conveniently packed and transported. In the case of a company using magnesium hydroxide, powdered magnesium hydroxide is mixed with water Can be used.

이하 본 발명에 의한 수산화마그네슘의 제조방법의 바람직한 실시예를 더욱 상세하게 설명한다.Hereinafter, preferred embodiments of the process for producing magnesium hydroxide according to the present invention will be described in more detail.

본 발명에 의한 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법은 마그네사이트로 수산화마그네슘을 제조하는 것으로 이루어진다.The method for producing magnesium hydroxide for neutralizing waste water and removing sulfur oxides according to the present invention comprises preparing magnesium hydroxide with magnesite.

즉 본 발명에서는 마그네사이트를 소성하여 마그네사이트를 산화마그네슘을 제조하여 한 후에 25 ~ 300℃로 냉각하는 냉각단계; 그리고 상기 냉각단계에서 냉각된 산화마그네슘에 물을 혼합 교반하여 건식 수산화마그네슘으로 제조하는 물혼합단계로 이루어진다.That is, in the present invention, the magnesium is produced by firing the magnesite to make the magnesium oxide, and then cooled to 25 to 300 ° C .; And water mixing step in which water is mixed and stirred with the magnesium oxide cooled in the cooling step to form dry magnesium hydroxide.

여기서 상기 냉각단계에서 25 ℃보다 낮게 냉각하면 후술하는 물혼합단계에서 산화마그네슘의 자체 수화로 분화되지 못하는 것이 발생될 수 있으며, 300 ℃보다 높으면 고온으로 인하여 후술하는 물혼합단계에서 폭발의 위험이 있는 것이다.If the temperature is lower than 25 캜 in the cooling step, magnesium oxide may not be able to differentiate into magnesium hydroxide in the water mixing step described later. If the temperature is higher than 300 캜, there is a risk of explosion in the water mixing step will be.

특히 상기 물혼합단계에서는 산화마그네슘 60 ~ 85 중량%에 물 15 ~ 40 중량%를 혼합하되, 산화마그네슘을 교반하면서 물을 분사하여 덩어리 형태의 산화마그네슘이 물의 분사 과정에서 산화마그네슘을 잔열로 인하여 수산화마그네슘으로 수화되면서 자체적으로 분화되는 것이다.In particular, in the water mixing step, water is sprayed while stirring the magnesium oxide with 60 to 85 wt% of magnesium oxide mixed with 15 to 40 wt% of water, whereby magnesium oxide in the form of lumps is dispersed in the aqueous magnesium hydroxide It is hydrated by magnesium and is itself differentiated.

여기서 물을 15 중량%보다 작게 투입하면 산화마그네슘이 수산화마그네슘으로 전부 수화되지 않을 수 있고, 덩어리 형태의 산화마그네슘이 자체의 잔열로 분화되지 못하는 것이 발생할 수 있으며, 물을 40 중량%보다 많이 투입하면 산화마그네슘을 전부 수화할 수 있으나, 산화마그네슘의 자체 열과 수화 과정에서 발생하는 열로 물을 전부 기화하는 시간이 많이 소요될 수 있어 건식 상태의 수산화마그네슘을 제조하는 시간이 많이 소요될 수 있다.If water is added in an amount less than 15% by weight, magnesium oxide may not be entirely hydrated with magnesium hydroxide, and magnesium oxide in a lump form may not be able to be differentiated into its own residual heat. If more than 40% by weight of water is added It is possible to completely hydrate the magnesium oxide. However, since it takes a long time to vaporize the entire water by the heat generated by the self-heating and hydration of the magnesium oxide, it may take a long time to produce the magnesium hydroxide in a dry state.

또한 본 발명에서는 상기 물혼합단계에서 제조된 건식 수산화마그네슘을 건식 분쇄하여 분말 형태의 수산화마그네슘으로 형성하는 분말화단계를 포함하여 산업 현장에서 분말화된 수산화마그네슘에 물을 혼합하여 그대로 사용할 수 있다.Also, in the present invention, the dry magnesium hydroxide produced in the water mixing step may be pulverized by dry pulverization to form powdered magnesium hydroxide, and water may be mixed with magnesium hydroxide powdered at the industrial site.

즉 수산화마그네슘(Mg(OH)2)을 이용하여 황산 폐수 또는 황산화물과 반응시키는 대표적 화학 반응식은 다음과 같다.That is, a representative chemical reaction formula in which magnesium hydroxide (Mg (OH) 2 ) is used to react with sulfuric acid wastewater or sulfur oxide is as follows.

Mg(OH)2 + 황산 → 황산마그네슘(MgSO4) + 물(H2O)Mg (OH) 2 + sulfuric acid → magnesium sulfate (MgSO 4 ) + water (H 2 O)

Mg(OH)2 + 이산화황(SO2) → 황산마그네슘(MgSO4) + 물(H2O)Mg (OH) 2 + sulfur dioxide (SO 2 ) - magnesium sulfate (MgSO 4 ) + water (H 2 O)

Mg(OH)2 + 삼산화황(SO3) → 황산마그네슘(MgSO4) + 물(H2O)Mg (OH) 2 + sulfur trioxide (SO 3 ) - magnesium sulfate (MgSO 4 ) + water (H 2 O)

Mg(OH)2 + 황산화물(SOx) → 황산마그네슘(MgSO4) + 물(H2O)Mg (OH) 2 + sulfuric acid (SOx) → magnesium sulfate (MgSO 4 ) + water (H 2 O)

Mg(OH)2 + 아황산(H2SO3) → 황산마그네슘(MgSO4) + 물(H2O)Mg (OH) 2 + sulfurous acid (H 2 SO 3 ) - magnesium sulfate (MgSO 4 ) + water (H 2 O)

다시 설명하자면 본 발명에 의한 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법은 마그네사이트(MgCO3)→ 무연탄 혼합 → 1,000℃내외 소성 후 25℃ 이상으로 냉각 → 산화마그네슘(MgO) + 물(또는 뜨거운 물) 혼합 → 분쇄 → 분말 수산화마그네슘 포장 및 운반 사용하게 된다.The method of manufacturing magnesium hydroxide for neutralization of waste water and removing sulfur oxides according to the present invention is characterized in that magnesium hydroxide (MgCO 3 ) is mixed with anthracite coal and then cooled to a temperature of 25 ° C or more after calcination at around 1,000 ° C, followed by magnesium oxide (MgO) Water) → grinding → powder magnesium hydroxide packing and transportation will be used.

우선 마그네사이트를 광산에서 채광하게 되며, 채광된 마그네사이트를 소성로에 무연탄과 함께 투입하여 공지된 바와 같이 1,000℃ 내외로 소성하여 마그네사이트를 산화마그네슘을 가변시킨다.First, the magnesite is mined in the mine. The mined magnesite is charged into the calcining furnace together with the anthracite coal, and the magnesium is calcined at about 1,000 ° C. as known in the art.

그리고 본 실시예에서는 소성된 마그네사이트인 산화마그네슘의 표면 온도가 25℃ 이상일 때 산화마그네슘 60 ~ 85 중량%에 물 15 ~ 40 중량%를 분사 투입하면서 혼합한다.In this embodiment, when the surface temperature of the fired magnesium oxide is 25 ° C or higher, 15 to 40% by weight of water is added to 60 to 85% by weight of magnesium oxide while being injected.

물론 소성된 마그네사이트의 표면 온도가 높을수록 수화에 유리하지만 온도가 높으면 높을수록 위험하기 때문에 본 발명에 의한 물혼합단계에서는 산화마그네슘의 표면 온도 25 ~ 90℃에서 물을 혼합하게 되며, 바람직하게는 수화 시간을 단축하기 위하여 산화마그네슘의 표면온도 80℃ 내외가 적당하며, 물이 투입되는 양은 산화마그네슘의 순도와 수화 반응시에 발생되는 열에 의해 물이 기화되는 양에 따라 조정하게 된다.Of course, the higher the surface temperature of the fired magnesite, the better the hydration, but the higher the temperature, the more dangerous it is. Therefore, in the water mixing step according to the present invention, water is mixed at a surface temperature of magnesium oxide of 25 to 90 ° C, In order to shorten the time, the surface temperature of magnesium oxide is suitably around 80 ° C. The amount of water to be added is adjusted according to the purity of magnesium oxide and the amount of water vaporized by the heat generated during the hydration reaction.

또한 산화마그네슘의 표면온도가 낮아 수화가 빠르게 진행되지 않을 때 고온의 물을 뿌려 수화를 촉진시킬 필요가 있으며, 물의 온도는 높으면 높을수록 좋지만 수화 속도에 따라 조절하여 물을 가열시키기 위한 불필요한 에너지 비용을 낭비하지 않는 것이 중요하다.In addition, when the surface temperature of magnesium oxide is low, when hydration does not progress rapidly, it is necessary to promote hydration by spraying high temperature water. The higher the water temperature, the better the higher the water temperature. However, the unnecessary energy cost It is important not to waste.

다시 말하면 소성한 마그네사이트에 소성열이 일부 남아 있을 때 물을 분사하면서 물과 산화마그네슘이 충분히 혼합될 수 있도록 교반기 또는 혼합기를 이용하여 이를 혼합 교반하면 산화마그네슘은 소성 시 남은 잔열로 인해 급격하게 수화 반응이 일어나면서 수산화마그네슘 분말로 전환된다.In other words, when the calcined magnesite is left with a part of calcining heat, water is sprayed while mixing and stirring the mixture with water using an agitator or a mixer so that water and magnesium oxide can be sufficiently mixed. If magnesium oxide is rapidly mixed with hydration Is converted into a magnesium hydroxide powder.

특히 물과 산화마그네슘의 혼합비를 적절하게 맞추지 못하면 건식 분쇄 시 수분으로 인해 상당한 문제점이 발생하므로 산화마그네슘이 수산화마그네슘으로 전환될 수 있는 최소한의 물만 산화마그네슘에 뿌려 주는 것이 중요하다.In particular, if the mixing ratio of water and magnesium oxide is not properly adjusted, it is important that only a minimum amount of water that can be converted to magnesium hydroxide is sprayed on magnesium oxide because a considerable problem occurs due to moisture during dry milling.

산화마그네슘(MgO)이 급격하게 수화 반응하면서 수산화마그네슘(Mg(OH)2)으로 수화된다.Magnesium oxide (MgO) is hydrated with magnesium hydroxide (Mg (OH) 2 ) while rapidly hydrating.

또한 산화마그네슘이 수산화마그네슘으로 수화되면서 대부분은 미분으로 변하기 때문에, 일차적으로 자체 분화되어 수산화마그네슘을 분쇄하는 과정이 용이하여 간단한 건식 분쇄만으로 건식 상태의 수산화마그네슘 분말을 생산할 수 있는 것이다.In addition, since magnesium oxide is hydrated by magnesium hydroxide and most of the magnesium oxide is converted into a fine powder, the process of pulverizing magnesium hydroxide is easy since it is self-differentiated, so that it is possible to produce magnesium hydroxide powder in a dry state only by simple dry grinding.

그러면 폐수 처리 현장에서는 별도의 설비를 갖출 필요가 없이 상기와 같이 분말화된 수산화마그네슘에 물을 혼합하여 그대로 사용할 있으며, 본 발명에서는 간단한 설비를 소성 현장에 갖추어서 분쇄된 수산화마그네슘을 제조할 수 있는 것이다.In this case, it is not necessary to provide a separate facility at the wastewater treatment site, but the powdered magnesium hydroxide is mixed with the water as it is. In the present invention, the powdered magnesium hydroxide can be prepared by providing a simple facility at the firing site will be.

Claims (4)

마그네사이트로 수산화마그네슘을 제조하는 것으로 이루어지는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법에 있어서,
마그네사이트를 소성하여 산화마그네슘을 제조한 후에 25 ~ 300℃로 냉각하는 냉각단계; 그리고 상기 냉각단계에서 냉각된 산화마그네슘에 물을 혼합 교반하여 건식 수산화마그네슘으로 제조하는 물혼합단계로 이루어지되,
상기 냉각단계에서 산화마그네슘의 표면온도가 25 ~ 90℃로 냉각되었을 때, 상기 물혼합단계에서 산화마그네슘을 교반하면서 물을 분사하며, 상기 물혼합단계에서는 산화마그네슘 60 ~ 85 중량%에 물 15 ~ 40 중량%를 혼합하되, 산화마그네슘을 교반하면서 물을 분사하여 덩어리 형태의 산화마그네슘이 물의 분사 과정에서 잔열로 인하여 자체적으로 분화되는 것을 특징으로 하는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법.A process for producing magnesium hydroxide for neutralization of wastewater and removal of sulfur oxides comprising producing magnesium hydroxide with magnesite,
A cooling step of cooling the magnesium oxide to 25 to 300 占 폚 after the magnesium oxide is produced by baking the magnesite; And a water mixing step of mixing water with magnesium oxide cooled in the cooling step to prepare magnesium hydroxide as dry magnesium hydroxide,
Wherein water is sprayed while stirring the magnesium oxide in the water mixing step when the surface temperature of the magnesium oxide is cooled to 25 to 90 DEG C in the cooling step and in the water mixing step, And 40 wt% of the magnesium oxide is mixed with the magnesium oxide, and the water is sprayed while stirring the magnesium oxide, so that the magnesium oxide in the form of a lump is self-dispersed due to the residual heat during the water spraying process. 삭제delete 삭제delete 제1항에 있어서,
상기 물혼합단계에서 제조된 건식 수산화마그네슘을 건식 분쇄하여 분말 형태의 수산화마그네슘으로 형성하는 분말화단계를 포함하여 이루어지는 폐수 중화 및 황산화물 제거용 수산화마그네슘의 제조방법.The method according to claim 1,
And a powdering step of dry-milling the dry magnesium hydroxide produced in the water mixing step to form magnesium hydroxide in a powder form, wherein the magnesium hydroxide for neutralization and sulfuric acid removal is removed.
KR1020140041755A 2014-04-08 2014-04-08 Mg(oh)_2 manufacturing method KR101462369B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140041755A KR101462369B1 (en) 2014-04-08 2014-04-08 Mg(oh)_2 manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140041755A KR101462369B1 (en) 2014-04-08 2014-04-08 Mg(oh)_2 manufacturing method

Publications (1)

Publication Number Publication Date
KR101462369B1 true KR101462369B1 (en) 2014-11-14

Family

ID=52290435

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140041755A KR101462369B1 (en) 2014-04-08 2014-04-08 Mg(oh)_2 manufacturing method

Country Status (1)

Country Link
KR (1) KR101462369B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112591774A (en) * 2020-11-18 2021-04-02 潍坊凯博镁盐有限公司 Method for preparing magnesium hydroxide by dry method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0867515A (en) * 1994-08-29 1996-03-12 Kazuo Murai Production of highly active magnesium hydroxide
JPH08283017A (en) * 1995-02-13 1996-10-29 Daicel Amiboshi Sangyo Kk Production of magnesium hydroxide and its water suspension
JPH1059711A (en) * 1996-08-12 1998-03-03 Daicel Amiboshi Sangyo Kk Magnesium hydroxide and production of aqueous liquid suspension thereof
WO2010004341A1 (en) * 2008-07-10 2010-01-14 Imerys Minerals Limited Magnesium hydroxide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0867515A (en) * 1994-08-29 1996-03-12 Kazuo Murai Production of highly active magnesium hydroxide
JPH08283017A (en) * 1995-02-13 1996-10-29 Daicel Amiboshi Sangyo Kk Production of magnesium hydroxide and its water suspension
JPH1059711A (en) * 1996-08-12 1998-03-03 Daicel Amiboshi Sangyo Kk Magnesium hydroxide and production of aqueous liquid suspension thereof
WO2010004341A1 (en) * 2008-07-10 2010-01-14 Imerys Minerals Limited Magnesium hydroxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112591774A (en) * 2020-11-18 2021-04-02 潍坊凯博镁盐有限公司 Method for preparing magnesium hydroxide by dry method

Similar Documents

Publication Publication Date Title
KR101881459B1 (en) The method of neutralization phospho-gypsum using Fluidized bed boiler Fly ash and use thereof
WO2015176429A1 (en) Method for extracting vanadium by leaching vanadium-containing raw material fired clinkers with ammonium bicarbonate solution
CN102424412B (en) Method of producing alumina from fly ash
CN102964132B (en) Olivine ceramsite sand and preparation method thereof
CN104787788B (en) Method for producing alumina from high-alumina fly ash
CN103613079A (en) Method for producing sulfuric acid from electrolytic manganese residues
CN102627305A (en) Method using alkaline process to extract alumina in coal ash
CN103950957A (en) Process method for preparing magnesium hydroxide from magnesium sulfate
CN104446060A (en) Magnesium oxychloride cement
CN108483957B (en) Method for preparing alpha-semi-hydrated gypsum
Cai et al. Phase transformations of vanadium recovery from refractory stone coal by novel NaOH molten roasting and water leaching technology
CN103086408A (en) Method for producing alumina by mixing and roasting flyash and ammonium sulfate
KR101462369B1 (en) Mg(oh)_2 manufacturing method
CN112624651A (en) Resource utilization method of electrolytic manganese filter-pressing residues
CN103395817B (en) Preparation method of high-purity anhydrous calcium sulfate
CN104445297A (en) Preparation method of nanometer magnesia
CN107674483A (en) A kind of Ardealite putty powder prepared by ardealite
CN107215850A (en) A kind of lithium slag and industry by-product gypsum Sulphuric acid joint product cement process
CN102115828B (en) Method for preparing iron and aluminum and coproducing sodium sulfate from red mud produced by bayer process
CN107556002A (en) The preparation method and its application method of construction sanitary ceramic mud degumming agent
KR101722963B1 (en) Method For Producing Magnesium Hydroxide Powder By Semidry Process
CN102627304A (en) Method for preparing magnesium-aluminum hydrotalcite
CN102627328B (en) Method for improving conversion rate in production of chromium by non-calcium roasting
JP5205685B2 (en) High specific surface area slaked lime, its production method and its use
CN104446059A (en) Integrated utilization method for industrial by-product

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
J204 Invalidation trial for patent
J206 Request for trial to confirm the scope of a patent right
J301 Trial decision

Free format text: TRIAL NUMBER: 2016100001299; TRIAL DECISION FOR INVALIDATION REQUESTED 20160519

Effective date: 20170131

J206 Request for trial to confirm the scope of a patent right
FPAY Annual fee payment

Payment date: 20170919

Year of fee payment: 4

J121 Written withdrawal of request for trial
J206 Request for trial to confirm the scope of a patent right
J302 Written judgement (patent court)

Free format text: TRIAL NUMBER: 2017200001397; JUDGMENT (PATENT COURT) FOR INVALIDATION REQUESTED 20170223

Effective date: 20170914

Free format text: TRIAL NUMBER: 2017200001380; JUDGMENT (PATENT COURT) FOR CONFIRMATION OF THE SCOPE OF RIGHT_DEFENSIVE REQUESTED 20170223

Effective date: 20170914

J301 Trial decision

Free format text: TRIAL NUMBER: 2017130000168; TRIAL DECISION FOR INVALIDATION REQUESTED 20171106

Effective date: 20180118

FPAY Annual fee payment

Payment date: 20181112

Year of fee payment: 5

J301 Trial decision

Free format text: TRIAL NUMBER: 2017100003380; TRIAL DECISION FOR CONFIRMATION OF THE SCOPE OF RIGHT_AFFIRMATIVE REQUESTED 20171026

Effective date: 20190304

J302 Written judgement (patent court)

Free format text: TRIAL NUMBER: 2019200003175; JUDGMENT (PATENT COURT) FOR CONFIRMATION OF THE SCOPE OF RIGHT_AFFIRMATIVE REQUESTED 20190417

Effective date: 20191025

FPAY Annual fee payment

Payment date: 20191125

Year of fee payment: 6