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Influence of Carbon Dioxide on Flotation and Deashing Characteristics of Coal. On Datong, Wandoan and Illinois Coals.
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- TSUNEKAWA Masami
- 北海道大学工学部資源開発工学科
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- SEO Shinichi
- 北海道大学大学院工学研究科
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- HIRAJIMA Tsuyoshi
- 北海道大学工学部資源開発工学科
Bibliographic Information
- Other Title
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- 石炭の浮遊性と脱灰性に及ぼす二酸化炭素の影響 大同炭，ワンドワン炭，イリノイ炭の場合
- On Datong, Wandoan and Illinois Coals
- 大同炭、ワンドワン炭、イリノイ炭の場合
Description
Three coals from different localities (Datong, Wandoan and Illinois) were used in this study. Immersion time measurements were carried out to assess wettability of coal surface using 100-200 mesh coals. Flotation tests were conducted by introducing air, nitrogen and carbon dioxide gases, respectively. After sparging the gases into coal slurries, the slurries were chemically analyzed. For flotation and chemical analysis fine coals (mean particle size: about 30 pm) were used. Some of the coals were treated with 0.6 kgf/cm2 of carbon dioxide gas prior to the experiments. The collectors used were kerosene for Datong coal and heavy oil A for the other coals.<BR>The hydrophobicity of three coals treated with carbon dioxide became slightly higher than that of untreated coals. When sparging carbon dioxide gas, the highest amounts of calcium and magnesium were dissolved from Datong and Wandoan coals and the amounts of bassanite and calcite in the coals were simultaneously decreased. By flotation with carbon dioxide, the maximum yield was obtained for the coals treated with carbon dioxide than the untreated coals, but the ash content of the froth products was high. For these froth products cleaner flotation with frother alone was carried out, and the ash content of clean coals was improved for Datong coal but not for Wandoan and Illinois coals. This was mainly caused by the difference in the liberation degree and flotation behavior of mineral matters in the coals, and the difference in the collectors used.
Journal
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- RESOURCES PROCESSING
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RESOURCES PROCESSING 41 (1), 18-27, 1994
The Resources Processing Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679242203264
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- NII Article ID
- 130003440697
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- ISSN
- 18839150
- 09124764
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
