KR930016369A - Method for manufacturing alumina for precision ceramic raw material from kaolin - Google Patents

Method for manufacturing alumina for precision ceramic raw material from kaolin Download PDF

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KR930016369A
KR930016369A KR1019920000845A KR920000845A KR930016369A KR 930016369 A KR930016369 A KR 930016369A KR 1019920000845 A KR1019920000845 A KR 1019920000845A KR 920000845 A KR920000845 A KR 920000845A KR 930016369 A KR930016369 A KR 930016369A
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South Korea
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alumina
kaolin
hydrochloric acid
ceramic raw
producing
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KR1019920000845A
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Korean (ko)
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박균영
정진기
최영윤
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김동학
재단법인 한국자원연구소
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Priority to KR1019920000845A priority Critical patent/KR930016369A/en
Publication of KR930016369A publication Critical patent/KR930016369A/en

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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

본 발명은 국내 저품위 고령토로부터 정밀요업용 알루미나의 제조방법과 고령토로부터 알루미나 추출 후 남는 잔사를 고무 충전제로 활용하는 방법에 관한 것이다.The present invention relates to a method of producing alumina for precision ceramics from low grade kaolin and a method of utilizing the residue remaining after alumina extraction from kaolin as a rubber filler.

국내 저품위 고령토로부터 알루미나의 제조방법은 고령토를 26wt.%정도의 염산과 105℃ 정도에 반응시켜 고령토 내의 알루미늄 성분을 염산 수용액 중으로 추출해 낸다. 염산 수용액 중에 불순물로 존재하는 철분을 용매추출로 제거하고 HC1가스를 주입하여 A1C13.6H2O로 회수한다.In the method of producing alumina from low grade kaolin in Korea, the aluminum component in kaolin is extracted into aqueous hydrochloric acid by reacting kaolin with about 26wt.% Hydrochloric acid at about 105 ° C. Iron present as an impurity in aqueous hydrochloric acid solution is removed by solvent extraction, and HC1 gas is injected to recover A1C1 3 .6H 2 O.

A1C13.6H2O를 열분해하여 알루미나를 얻고 염산을 회수한다. 알루미나에 함유되어 있는 나트륨을 제거하기 위하여 A1C13.6H2O를 열분해시 HC1분위기를 유지시킨후 생성된 알루미나를 물로 세척하는 방법과 공기중에서 열분해한 후 규석을 첨가하여 규산나트륨으로 만들어 제거하는 방법을 사용하였다.By thermal decomposition of A1C1 3 .6H 2 O to obtain the alumina is recovered with hydrochloric acid. Method of removing a to remove the sodium contained in the alumina in a pyrolysis method of washing the alumina produced After holding the decomposition HC1 atmosphere to A1C1 3 .6H 2 O and water, and then air by the addition of silica made of sodium silicate Was used.

A1C13.6H2O의 열분해에 의해 얻어진 알루미나를 1200℃ 이상의 고온에서 A1F3등의 첨가제와 함께 소성시킴으로써 0.1-10.0미크론 크기의 알파 결정크기를 가지는 알루미나를 제조하였다.By the alumina obtained by thermal decomposition of A1C1 3 .6H 2 O with plastic additives such as A1F 3 at a high temperature above 1200 ℃ was prepared with an alpha alumina crystal size of 0.1 to 10.0 microns.

고령토로부터 알루미나 추출 후 남는 잔사(실리카가 주성분임)를 1미크론으로 분쇄하여 고무 충전제로 사용한 결과 경점토(Hard clay)대체품으로 사용될수 있게 한 것을 특징으로 하는 고령토로 부터 정밀요업 원료용 알루미나 제조방법.Method for producing alumina for fine ceramics from kaolin, characterized in that the residue (silica is the main ingredient) remaining after extraction of alumina from kaolin is ground to 1 micron and used as a rubber filler. .

Description

고령토로부터 정밀요업 원료용 알루미나 제조방법Method for manufacturing alumina for precision ceramic raw material from kaolin

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

Claims (5)

고령토로부터 알루미늄의 성분을 염산 수용액 중으로 녹여낸 후 염산 수용액으로부터 AICl3.6H2O를 결정화시켜 회수한 후 열분해 시키는 과정에서 분위기 개스를 염화수소로 유지함으로써 나트륨 성분을 염화나트륨의 형태로 변환하여 열분해 후 알루미나에 섞여있는 염화나트륨을 물로 세척하여 나트륨을 제거함을 특징으로 하는 고령토로부터 정밀요업 원료용 알루미나 제조방법.After dissolving the aluminum component from kaolin into the aqueous hydrochloric acid solution, crystallizing and recovering AICl 3 .6H 2 O from the hydrochloric acid aqueous solution, the pyrolysis process converts the sodium component into the form of sodium chloride, and then thermally decomposes the alumina to alumina. A method for producing alumina for precision ceramic raw materials from kaolin, characterized by removing sodium by washing the mixed sodium chloride with water. 제1항에 있어서, AlCl3.6H2O를 900℃정도에서 열분해시킨후 생성되는 감마(gamma)결정형태의 알루미나를 1000-1400℃에서 규석과 혼합하여 가열함으로써 알루미나내에 포함되어 있는 나트륨을 규석과 반응하도록 함을 특징으로 하는 고령토로부터 정밀요업 원료용 알루미나 제조방법.The silica contained in the alumina according to claim 1, wherein the alumina in a gamma crystal form, which is formed after pyrolysis of AlCl 3 .6H 2 O at about 900 ° C., is mixed with silica at 1000-1400 ° C. and heated. Method for producing alumina for fine ceramics raw material from kaolin, characterized in that to react with. 제1항에 있어서, AlCl3.6H2O를 1100-1400℃에서 열분해 생성된 알루미나를 1-8시간 가열함으로써 알루미나의 알파(alpha)결정크기를 0.1--1.0미크론 범위로 조절함을 특징으로 하는 고령토로부터 정밀요업 원료용 알루미나 제조방법.The method of claim 1, characterized in that the alpha crystal size of the alumina is adjusted to a range of 0.1-1.0 micron by heating AlCl 3 .6H 2 O pyrolyzed alumina at 1100-1400 ° C. for 1-8 hours. Method for producing alumina for precision ceramic raw materials from kaolin. 제1항 있어서, AlCl3.6H2O를 열분해하여 생성한 알루미나에 AlF3를 소량 첨가하고 1000-1400℃정도에서 가열함으로써 알루미나의 알파(alpha)결정크기를 1-10미크론 범위로 조절함을 특징으로 하는 고령토로부터 정밀요업 원료용 알루미나 제조방법.According to claim 1, AlF 3 is added to the alumina produced by pyrolysis of AlCl 3 .6H 2 O to adjust the alpha (alpha) crystal size of the alumina in the range of 1-10 microns by heating at about 1000-1400 ℃. Alumina production method for precision ceramic raw materials from kaolin. 제1항에 있어서, 고령토에서 알루미나 추출 후 남게되는 잔사(residue)를 분쇄하여 고무충전제로 활용함을 특징으로 하는 고령토로부터 정밀요업 원료용 알루미나 제조방법.The method of manufacturing alumina for fine ceramic raw materials from kaolin, according to claim 1, wherein the residue remaining after extraction of alumina in kaolin is pulverized and used as a rubber filler. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920000845A 1992-01-22 1992-01-22 Method for manufacturing alumina for precision ceramic raw material from kaolin KR930016369A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100411601B1 (en) * 2000-03-22 2003-12-18 대한민국(여수대학교 총장) A meso-porous activity alumina used Kaolinite and manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100411601B1 (en) * 2000-03-22 2003-12-18 대한민국(여수대학교 총장) A meso-porous activity alumina used Kaolinite and manufacturing method

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