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 PDFInfo
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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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- KR
- South Korea
- Prior art keywords
- alumina
- kaolin
- hydrochloric acid
- ceramic raw
- producing
- Prior art date
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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
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920000845A KR930016369A (en) | 1992-01-22 | 1992-01-22 | Method for manufacturing alumina for precision ceramic raw material from kaolin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920000845A KR930016369A (en) | 1992-01-22 | 1992-01-22 | Method for manufacturing alumina for precision ceramic raw material from kaolin |
Publications (1)
Publication Number | Publication Date |
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KR930016369A true KR930016369A (en) | 1993-08-26 |
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Family Applications (1)
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KR1019920000845A KR930016369A (en) | 1992-01-22 | 1992-01-22 | Method for manufacturing alumina for precision ceramic raw material from kaolin |
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Cited By (1)
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 |
-
1992
- 1992-01-22 KR KR1019920000845A patent/KR930016369A/en not_active Application Discontinuation
Cited By (1)
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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