KR100226907B1 - Manufacturing method of high purity lime oil for seawater magnesia clinker - Google Patents
Manufacturing method of high purity lime oil for seawater magnesia clinker Download PDFInfo
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- KR100226907B1 KR100226907B1 KR1019950068466A KR19950068466A KR100226907B1 KR 100226907 B1 KR100226907 B1 KR 100226907B1 KR 1019950068466 A KR1019950068466 A KR 1019950068466A KR 19950068466 A KR19950068466 A KR 19950068466A KR 100226907 B1 KR100226907 B1 KR 100226907B1
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- lime oil
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- magnesia clinker
- limestone
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000001279 citrus aurantifolia swingle expressed oil Substances 0.000 title claims abstract description 39
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000013535 sea water Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 24
- 235000019738 Limestone Nutrition 0.000 claims abstract description 23
- 239000006028 limestone Substances 0.000 claims abstract description 23
- 238000007873 sieving Methods 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 37
- 239000000292 calcium oxide Substances 0.000 claims description 22
- 235000012255 calcium oxide Nutrition 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001354 calcination Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 abstract description 20
- 238000010304 firing Methods 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 16
- 239000000377 silicon dioxide Substances 0.000 description 11
- 235000012239 silicon dioxide Nutrition 0.000 description 11
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 6
- 239000000347 magnesium hydroxide Substances 0.000 description 6
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000029087 digestion Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002198 insoluble material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
-
- 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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
본 발명에 의하면 석회유 제조시 소성 온도를 종래보다 고온화시켜 국내산 석회석내 함유 불순물이 화합물 및 용체를 형성하여 입도가 크게 되므로써 후 공정인 체거름 조작에 의해 쉽게 제거되는 해수 마그네시아 클린커 제조용 고순도 석회유의 제조 방법이 제공된다.According to the present invention, the production of high-purity lime oil for the manufacture of seawater magnesia clinker which is easily removed by the sieving operation, which is performed by increasing the firing temperature of lime oil at a higher temperature than conventional ones, resulting in a large particle size by forming impurities and compounds in domestic limestone. A method is provided.
본 발명은 기존 공정을 그대로 사용하므로 공장의 추가 설비비 부담이 없으며, 고순도의 석회유가 제조되어 이를 원료로 한 해수 마그네시아 클린커 역시 고순도 물질을 얻을 수 있는 것이다.Since the present invention uses the existing process as it is, there is no burden of additional equipment cost of the plant, and the high-purity lime oil is manufactured so that the seawater magnesia clinker using the raw material can also obtain a high-purity material.
Description
본 발명은 해수 마그네시아 클린커 제조용 고순도 석회유의 제조 방법에 관한 것이며, 보다 상세히는 해수 마그네시아 클린커 제조용 석회유 생성시 원료인 석회석내 함유 불순물이 그대로 유입됨을 방지하는 제조방법에 관한 것이다.The present invention relates to a method for producing high purity lime oil for manufacturing seawater magnesia clinker, and more particularly, to a method for preventing impurities in limestone, which are raw materials, from being produced during production of lime oil for preparing seawater magnesia clinker.
석회유(Ca(OH)2slurry)는 석회석(CaCO3)을 소성하여 생석회(CaO)를 만든 다음 이 생석회에 물을 반응시켜 제조된다.Lime oil (Ca (OH) 2 slurry) is produced by calcining limestone (CaCO 3 ) to produce quicklime (CaO) and then reacting the quicklime with water.
상기 석회유는 소석회(Ca(OH)2) 제조 혹은 해수 마그네시아 클린커 제조용 원료로 소석회 슬러리(석회유) 제조 등에 사용되고 있다.The lime oil is used for the production of calcined lime (Ca (OH) 2 ) or the production of calcined lime slurry (lime oil) as a raw material for seawater magnesia clinker production.
특히 해수 마그네시아 클린커로는 산화마그네슘(MgO) 함량이 99%이상인 고순도 마그네시아가 제조되고 있으며 최근에는 고순도 조대결정 마그네시아가 제조되어 제강용 마그네시아 카본 벽돌의 원료로도 사용되고 있다.In particular, high-purity magnesia having a magnesium oxide (MgO) content of 99% or more is manufactured as the seawater magnesia clinker, and recently, high-purity coarse crystal magnesia is manufactured and used as a raw material for magnesia carbon brick for steelmaking.
따라서, 해수 마그네시아 클린커 제조시에는 산화마그네슘 함량 99%이상의 고순도 마그네시아 제조가 필수적인데 현재 우리나라에서 제조하지 못하고 있다.Therefore, when manufacturing a seawater magnesia clinker, it is necessary to manufacture high purity magnesia having a magnesium oxide content of 99% or more, but it is not currently manufactured in Korea.
이와같이 산화마그네슘 함량 99%이상의 고순도 마그네시아를 제조하기 위해서는 원료인 해수와 석회유의 순도가 높아야 하는 것이다.As such, in order to manufacture high purity magnesia having a magnesium oxide content of 99% or higher, the purity of seawater and lime oil as raw materials should be high.
종래의 해수 마그네시아 제조공정에 있어서, 해수와 석회유를 반응시키면 해수중의 마그네슘 이온이 석회유의 수산화칼슘((Ca(OH)2)와 반응하여 수산화마그네슘(Mg(OH)2)가 되어 침전물로 석출되고, 석회유 즉 수산화칼슘중 칼슘 이온은 해수 중 염소 이온과 반응하여 염화칼슘(CaCl2) 형태로 반응종결 후 상동액 내에 용해되어 있으므로 여과를 거치면 쉽게 수산화마그네슘과 분리되고, 이 수산화마그네슘을 소성한 후 산화마그네슘을 제조하게 된다.In the conventional seawater magnesia manufacturing process, when seawater and lime oil react, magnesium ions in seawater react with calcium hydroxide ((Ca (OH) 2 ) of lime oil to form magnesium hydroxide (Mg (OH) 2 ) to precipitate as a precipitate. , Calcium ions in lime oil, or calcium hydroxide, react with chlorine ions in seawater to dissolve in the form of calcium chloride (CaCl 2 ) and then dissolve in the homologous solution, so they are easily separated from magnesium hydroxide after filtration and after firing the magnesium hydroxide, It will be prepared.
이때 해수중에 이산화규소(SiO2) 및 탄산 이온이 많으면 순도를 저하시키므로 이들 불순물의 제거를 위한 전처리를 거치는 것이다.At this time, if silicon dioxide (SiO 2 ) and carbonate ions in the sea water is high, the purity is lowered, and thus, pretreatment is performed to remove these impurities.
또한 석회석을 소성 후 물과 반응시켜 석회유를 생성한 뒤에도 정제를 목적으로 한 체거름 조작을 통하여 상기 이산화규소등 불순물 제거를 위한 전처리 공정을 거친다.In addition, after calcining limestone and reacting with water to produce lime oil, the limestone is subjected to a pretreatment process for removing impurities such as silicon dioxide through a sieving operation for purification.
즉 상기 전처리된 각 해수 및 석회유를 반응시켜 수산화마그네슘을 제조하는 데 있어서 각 원료의 전처리 공정에서 불순물인 이산화규소, 산화알루미늄 및 산화철등이 제거되지 않으면, 이 불순물들은 반응 후 수산화마그네슘 석출과 함께 침강하여 직접적으로 결과물질인 수산화 마그네슘의 순도 저하에 영향을 미치는 것이다.In other words, in the preparation of magnesium hydroxide by reacting each of the pretreated seawater and lime oil, impurities such as silicon dioxide, aluminum oxide and iron oxide are not removed in the pretreatment process of each raw material, and these impurities are precipitated together with magnesium hydroxide precipitation after the reaction. This will directly affect the purity of the resulting magnesium hydroxide.
한편, 이같은 불용성 물질 즉 이산화규소, 산화알루미늄 및 산화철등은 석회유 생성원료인 석회석내 함유된 불순물로서 석회석의 소성 단계 혹은 소성 후 생성된 생석회(CaO)에 물을 반응시키는 소화 반응에 의해서도 없어지지 않는 성분이다.On the other hand, such insoluble materials, such as silicon dioxide, aluminum oxide and iron oxide are impurities contained in limestone, which is a raw material of lime oil, and are not removed by the digestion reaction in which water is reacted with calcined limestone (CaO) produced after calcining or after calcining. to be.
단지 소화반응 후 석회유를 체거름 조작을 거쳐 비교적 입도가 큰 이산화규소 등을 일부 제거하는 정도이다.Only after digestion, lime oil is sieved to remove some of the larger silicon dioxide.
따라서, 석회석 자체의 순도가 높지 않으면 고순도 마그네시아를 제조할 수 없으며, 우리나라에서는 고순도 석회석이 생산되지 않으므로 고순도의 마그네시아 생산은 어려운 것으로 간주되어 왔다.Therefore, high purity magnesia cannot be produced unless the purity of limestone itself is high, and high purity limestone is not produced in Korea, and high purity magnesia production has been considered difficult.
한편 일본은 고순도 석회석이 풍부하므로 쉽게 고순도 마그네시아를 제조할 것이며, 일본 특허 소 57-31547, 평 6-107413등에서도 석회유 정제에 대하여는 기술하고 있지 않다.On the other hand, Japan is rich in high-purity limestone, so it is easy to manufacture high-purity magnesia, and Japanese Patent Nos. 57-31547 and 6-107413 do not describe lime oil refining.
현재 국내산 석회석을 원료로 한 마그네시아 클린커 제조용 석회유 제조방법은 다음과 같다.Currently, the method of manufacturing lime oil for producing magnesia clinker using domestic limestone is as follows.
석회석(Ca(OH)3)을 생석회(CaO)로 분해되는 열분해온도인 825℃보다 높은 860℃로 소성하여 생석회를 제조하고, 이 생석회를 물과 반응시켜 수산화칼슘 슬러리인 석회유를 생성하고, 상기 석회유를 3㎜체로 일차 체거름을 거친 후, 최종적으로 1㎜ 체로 2차 체거름을 거쳐 석회유를 제조한다.Limestone (Ca (OH) 3 ) is calcined to 860 ° C. higher than 825 ° C., which is a pyrolysis temperature decomposed into quicklime (CaO), to prepare quicklime, and reacted with water to produce lime oil as a calcium hydroxide slurry, and the lime oil After passing through the primary sieve with a 3 mm sieve, and finally through a secondary sieve with a 1 mm sieve, lime oil is produced.
제조된 석회유내에는 불용성 물질로서 통상 이산화규소 0.55- 0.6%, 산화철 0.15-0.25% 및 산화알루미늄 0.1-0.2% 정도가 포함되어 있는바, 이들은 결과적으로 마그네시아의 순도를 저하시키는 원인이 되고 있다.The prepared lime oil usually contains about 0.55-0.6% of silicon dioxide, 0.15-0.25% of iron oxide, and about 0.1-0.2% of aluminum oxide as insoluble materials, and as a result, these causes a decrease in the purity of magnesia.
이중 이산화규소는 석회석 내에 분산되어 분포하고 있으며, 산화알루미늄 및 산화철은 석회석의 틈새에 끼어 있는 상태로 존재함이 알려져 있다.Among them, silicon dioxide is dispersed and distributed in limestone, and it is known that aluminum oxide and iron oxide exist in the gap of limestone.
따라서 이 불순물들은 크기가 대단히 작은 상태로 석회석내에 존재하게 된다. 한편 이들 불순물은 석회석 소성 온도인 860℃에서 반응하지 않고 존재하여, 결국 생성된 생석회내는 물론 생석회와 물을 반응시키는 소화 반응시에도 미세한 입자로 존재하고, 2차에 걸친 체거름 조작에도 석회유 내에 잔존하게 되어 석회유의 순도를 저하시키는 원인이 되는 것이다.Thus, these impurities are present in limestone in very small sizes. On the other hand, these impurities do not react at the limestone firing temperature of 860 ° C., and thus are present as fine particles in the generated quicklime as well as in the digestion reaction in which quicklime reacts with water, and remain in lime oil even during the second sieving operation. This will cause a decrease in the purity of lime oil.
이에 본 발명의 목적은 이들 미세한 불순물의 입도를 크게 하여 종래의 공정대로 체거름을 거쳐 보다 개선된 해수 마그네시아 클린커 제조용 고순도 석회유의 제조방법을 제공하는데 있다.Accordingly, an object of the present invention is to provide a method for producing high purity lime oil for producing seawater magnesia clinker, which is improved by sieving according to a conventional process by increasing the particle size of these fine impurities.
본 발명에 의하면, 석회석을 1000~1200℃의 온도 범위에서 소성하여 생석회를 제조하고, 상기 생석회를 물과 반응시켜 석회유를 생성하고, 생성된 석회유를 체거름 조작함을 특징으로 하는 해수마그네시아 클린커 제조용 고순도 석회유의 제조방법이 제공된다.According to the present invention, calcined limestone in a temperature range of 1000 ~ 1200 ℃ to produce quicklime, the quicklime reacts with water to produce lime oil, and the seawater magnesia clinker characterized in that the sieved operation Provided is a method of preparing high purity lime oil for production.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
상기 미세한 불순물 제거방법에 있어서, 본 발명은 석회석의 소성온도를 종래공정보다 높여서 소성함으로서 석회석의 소성시에 미세한 불순물인 이산화규소, 산화 알루미늄 및 산화철등이 생석회와 단독 또는 그 이상의 성분계로 반응하여, 그 반응물이 생석회 내에서 덩어리 상태로 존재케하여 체거름 공정에서 제거시키는 방법에 관한 것이다.In the fine impurity removal method, the present invention calcinates the limestone by raising the calcining temperature higher than that of the conventional process, so that fine impurities such as silicon dioxide, aluminum oxide, iron oxide, etc. react at the time of calcining limestone with the quicklime alone or in a higher component system. It relates to a method in which the reactant is present in a lump in quicklime and removed in a sieving process.
즉, 불순물인 이산화규소(SiO2), 산화알루미늄(Al2O3) 및 산화철(Fe2O3)이 생석회(CaO)와 반응하여 SiO2-CaO, Fe2O3-CaO 및 Al2O3-CaO 혹은 SiO2- Fe2O3-CaO, SiO2-Al2O3-CaO 및 Fe2O3-Al2O3-CaO 혹은 SiO2-Al2O3-Fe2O3-CaO 등의 화합물 또는 용체를 형성하게 하면 입도가 커지고 안정한 상태가 되어 소화단계에는 불용이고 체거름 조작에는 용이하게 분리됨으로 쉽게 제거할 수 있는 것이다.That is, impurities such as silicon dioxide (SiO 2 ), aluminum oxide (Al 2 O 3 ) and iron oxide (Fe 2 O 3 ) react with quicklime (CaO) to form SiO 2 -CaO, Fe 2 O 3 -CaO, and Al 2 O. 3 -CaO or SiO 2 -Fe 2 O 3 -CaO, SiO 2 -Al 2 O 3 -CaO and Fe 2 O 3 -Al 2 O 3 -CaO or SiO 2 -Al 2 O 3 -Fe 2 O 3 -CaO When the compound or the solvent is formed, the particle size becomes large and becomes a stable state, which is insoluble in the digestion step and can be easily removed because it is easily separated for the sieving operation.
본 발명의 방법에서 소성단계의 온도는 1000-1200℃가 바람직하다. 이 온도범위에서 불순물인 MgO 0.5중량%이하, SiO20.2중량%이하, Fe2O30.1중량%이하 및 Al2O30.1중량%이하가 되는 고순도의 조건을 갖추게 되는 것이다.In the method of the present invention, the temperature of the firing step is preferably 1000-1200 ° C. In this temperature range, high purity conditions such as 0.5% by weight or less of MgO as impurities, 0.2% by weight of SiO 2 , 0.1% by weight of Fe 2 O 3, and 0.1% by weight of Al 2 O 3 are satisfied.
1000℃ 이하에서는 불순물과 생석회와의 반응이 잘 이루어지지 않으며, 1200℃이상이 되면 내화물의 조건 및 기타 공정상 문제점으로 기존 공정을 사용하기가 어려워진다.Below 1000 ° C, the reaction between impurities and quicklime does not occur well, and when the temperature exceeds 1200 ° C, it is difficult to use the existing process due to the refractory conditions and other process problems.
상기 온도 범위에서 소성한 후 물과 반응시켜 석회유를 생성시킨다.After baking in the above temperature range it is reacted with water to produce lime oil.
이같은 석회유 단계에서, 생석회와 물은 1시간 동안 교반을 거쳐 반응시킨다.In this lime oil step, quicklime and water are reacted by stirring for 1 hour.
생성된 석회유를 체거름하면 입도가 커진 불순물인 이산화규소, 산화알루미늄 및 산화철등이 제거되어 고순도의 석회유를 제거할 수 있는 것이다.When the resulting lime oil is sieved, silicon dioxide, aluminum oxide, iron oxide, etc., which have increased particle sizes, are removed to remove lime of high purity.
본 발명의 방법에 있어서, 체거름 조작은 3㎜ 체로 1차 체거름을 거친 후, 1㎜ 체로 2차 체거름하는 종래공정을 그대로 사용한다.In the method of the present invention, the sieving operation uses a conventional sieving process in which a second sieving is carried out in a 1 mm sieve after passing through a primary sieve in a 3 mm sieve.
상기한 바와같이 고순도의 석회유 제조 방법은 기본공정을 종래대로 사용함으로써 추가 설비비가 필요하지 않고, 석회석 소성시의 소성 온도만 변화시켜 고순도의 석회유를 제조함으로써, 최종산물인 해수 마그네시아 클린커의 제조시에도 종래보다 더 고순도의 제품을 얻을 수 있게 된다.As described above, the method of manufacturing lime oil of high purity does not require additional equipment cost by using the basic process as conventional, and manufactures seawater magnesia clinker which is the final product by producing lime of high purity by changing only the firing temperature at the time of limestone firing. Even higher-purity products can be obtained than before.
이하, 실시예에서 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail in the Examples.
[실시예]EXAMPLE
기본공정에서 실시중인 온도인 860℃ 및 보다 고온인 900℃, 1000℃, 1100℃ 및 1200℃ 에서 석회석을 소성하여 물에 넣고 1시간 동안 교반하여 반응시킨 후 3㎜ 체로 1차 체거름한 다음 1㎜ 체로 2차 체거름하였다.Limestone is calcined at 860 ° C, which is the temperature in the basic process, and 900 ° C, 1000 ° C, 1100 ° C, and 1200 ° C, which is higher in temperature, put into water, and stirred for 1 hour to react. Secondary sieving was carried out in mm.
제조된 석회유의 화학성분을 분석하여 하기 표1에 나타내었다.The chemical composition of the prepared lime oil is shown in Table 1 below.
표 1의 결과에 의하면 기존에 실시하는 공정내 소성온도인 860℃에서는 이산화규소, 산화알루미늄 및 산화철 등의 불순물이 다량 포함되어 있었다.According to the results of Table 1, a large amount of impurities such as silicon dioxide, aluminum oxide, and iron oxide were contained at 860 ° C, which is a conventional in-process firing temperature.
한편 고온 처리함을 따라 불순물 양은 급격히 감소됨을 볼 수 있었다. 860℃ 및 900℃에서보다는 1000℃에서 불순물의 휠씬 급격한 감소를 볼 수 있었으며, 1000℃보다는 110-1200℃에서 불순물이 좀더 감소된 것이다.On the other hand, as the high temperature treatment, it was found that the amount of impurities rapidly decreased. The drastic reduction of impurities was observed at 1000 ° C. rather than at 860 ° C. and 900 ° C., and the impurities were more reduced at 110-1200 ° C. than at 1000 ° C.
상기한 바와 같이 본 발명에서는 소성 열처리 온도를 1000℃이상으로 하여 석회유내 불순물 함유량이 MgO 0.5중량%이하, SiO20.2중량%이하, Fe2O30.1중량% 이하 및 Al2O30.1중량%이하의 고순도 조건을 충족시킬 수 있었다.As described above, in the present invention, the calcined heat treatment temperature is 1000 ° C or higher, and the impurity content in lime oil is 0.5% by weight or less of MgO, 0.2% by weight or less of SiO 2 , 0.1% by weight or less of Fe 2 O 3, and 0.1% by weight of Al 2 O 3. The following high purity conditions could be satisfied.
단, 1200℃이상이 되면 내화물 및 공정상 문제점이 드러나 종래 공정을 그대로 사용하기가 어려워진다.However, if it is more than 1200 ℃ refractory and process problems are revealed, it is difficult to use the conventional process as it is.
따라서 본 발명에서 석회석 열분해 소성온도는 1000-1200℃로 한정시켰다.Therefore, limestone pyrolysis firing temperature in the present invention was limited to 1000-1200 ℃.
상기한 바와같이 본 발명에 의하여 실용화될 경우, 공장의 설비 추가에 따른 비용이 들지 않고 고순도의 석회유를 제조하여, 목적 산물인 해수 마그네시아 클린커제조에도 매우 유용하다.When it is put to practical use by the present invention as described above, high-purity lime oil is produced without incurring the cost of plant addition, and is very useful for producing seawater magnesia clinker, which is a target product.
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