Invention Grant
- Patent Title: Method of detoxifying asbestos contained in waste slate and detoxified asbestos obtained through the same
- Patent Title (中): 废弃石板中含有的石棉的解毒方法和通过其获得的解石棉
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Application No.: US14309706Application Date: 2014-06-19
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Publication No.: US09446273B2Publication Date: 2016-09-20
- Inventor: Young-Nam Jang , Kyungsun Song , Myung Gyu Lee , Soo-Chun Chae , Hwanju Jo , Jun-Hwan Bang , Kyoung Won Ryu
- Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
- Applicant Address: KR Daejeon
- Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCE
- Current Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCE
- Current Assignee Address: KR Daejeon
- Agency: Lewis Roca Rothgerber Christie LLP
- Priority: KR10-2013-0072999 20130625
- Main IPC: A62D3/36
- IPC: A62D3/36 ; B09B3/00 ; A62D101/41
Abstract:
Disclosed is a method of detoxifying asbestos of waste slate. The method includes concentrating the asbestos by introducing hydrochloric acid aqueous solution into waste slate powder to dissolve and remove a limestone component contained in the waste slate; and mixing the concentrated asbestos with oxalic acid and performing a low-temperature heat treatment. The waste slate is crushed and pulverized and powder of the crushed and pulverized waste slate is formed in a size in a range of 100 meshes to 300 meshes. The detoxified asbestos includes re-crystallized magnesium oxalate having a rhombohedral or amorphous shape.
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