返回Google圖書搜尋

Effect of Humic Acid on Floatability of Coal and Pyrite

University of British Columbia. Department of Mining and Mineral Process Engineering

其他書名	Final Report
出版	The Department, 1983
URL	http://books.google.com.hk/books?id=WS8tjwEACAAJ&hl=&source=gbs_api

註釋Humic acid has been shown to adsorb on graphite, coal and coal-pyrite and to modify the surface properties of these minerals. The surface of a hydrophilic in the presence of humic acid, andthe floatability of graphite is effectively depressed in a fewppm humic acid solutions. The effect of humic acid is morepronounced in the presence of inorganic electrolytes (potassiumchloride, potassium nitrate). Humic acid was shown to depresscoal as well as pyrite. It was found that the amount of humicacid needed for depression varies for different coals. Flotationof the pyrite containing DEVCO coal in the presence of humic acidproduces concentrates with a lower content of sulphur, but theyield of concentrate is also reduced.