Korea Institute of Geoscience and Mineral Resources

Korea Institute of Geoscience and Mineral Resources (kigam)

Soo-Chun Chae

Young-Nam Jang

Kyungsun Song

Myung-Kyu Lee

Seung-Woo Lee

Myung Gyu Lee

Chi-Wan Jeon

Jun-Hwan Bang

Kyoung Won Ryu

Hye-In Won

Kyoung-Won Ryu

Hee-Young Shin

Whan-Tae Kim

Hwanju Jo

In-Kook Bae

A method of coating a calcium carbonate film. In one aspect, the method includes preparing a calcium aqueous solution by adding a calcium-containing material to distilled water; forming a calcium carbonate film on a surface of the calcium aqueous solution by leaving the calcium aqueous solution; placing the calcium carbonate film on a substrate; and forming a calcium carbonate coating film by leaving the calcium carbonate film on the substrate.

Coating method of calcium carbonate film

Disclosed is a method of preparing calcium carbonate using a direct carbonation reaction. The method includes dissolving fuel gas desulfurization gypsum into an ammonia solution, performing a filtering process after making a carbonation reaction by feeding carbon dioxide into the ammonia solution in which the fuel gas desulfurization gypsum is dissolved, and performing a filtering process after precipitating the calcium carbonate by maintaining a filtered solution in a stationary state.

Method of preparing calcium carbonate using direct carbonation reaction

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.

Method of detoxifying asbestos contained in waste slate and detoxified asbestos obtained through the same

Disclosed is a method of detoxifying asbestos by using a room-temperature recrystallization scheme. The method includes heat-treating a rock or slate containing asbestos; and putting the heat-treated rock or slate in an aqueous solution, to which organic acid is added, to allow the heat-treated rock or slate to react with the aqueous solution having the organic acid.

Method of detoxifying asbestos by using room-temperature recrystallization scheme

Disclosed is a method of removing asbestos from an asbestos-containing material by 99% through low temperature heat treatment. The method includes mixing an asbestos-containing material with an oxalic acid at a weight ratio in a range of 1:0.002 to 1:1 and performing heat treatment with respect to a mixture at a temperature of 90&#xb0; C. to 110&#xb0; C. to remove asbestos from the asbestos-containing material by 99% or more.

Method of removing asbestos from asbestos-containing materials by 99% through low temperature heat treatment

A method for extracting rare earth elements from monazite is disclosed. The method includes milling a mixture of monazite including phosphates and rare earth elements and sodium hydroxides inside a mill containing a plurality of balls to form powder by colliding the mixture into balls with each other, converting the mixture into rare earth hydroxides and sodium phosphates through the reaction occurring in the process of repeated collision, and extracting rare earth elements from the powder.

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Seoul, South Korea

Soo-Chun Chae