INVESTIGATION OF THE CIRCULAR CONCENTRATOR-FLOT A TION CIRCLE SYSTEM FOR CLEANING FINE COAL
Special Research Report SR-33 The mining of high-ash, high sulfur coal has been necessitated by a depletion of high quality coking and steam coal. An increase in the percentage of fines contained in the run-of-mine coal has resulted from the use of continuous miners. Because of the strict air pollution laws and stringent demands by the coking industry, an increased empahsis has been placed on efficient, low cast, fine coal cleaning methods. As a continuation of the work reported in SR- 30, tests were conducted on segments of the Cannon Circular Concentrator Table and the Cannon Flotation Circle to study the operating conditions and to determine the cleaning efficiency of these units in the cleaning of the fine coal. These units have been developed for use in phosphate and beach sand concentrators. They are attractive economically to the coal industry because they process high tonnages per unit area and have no moving parts. The Cannon Circular Concentrator Table will ope rate at a high efficiency when cleaning 1/4 inch x 1/4 m. m. run-of-mine coal. However, this hgih efficiency is obtained only by recleaning the primary refuse product. A flow sheet of this type would be applicable to a coal preparation plant operation. The flotation circle will clean the minus 1/4 m. m. run-of-mine coal but both the grade and recovery are less than that obtained by cleaning the same coal on a standard flotation cell. The test work conducted has indicated a need for design modifications on the flotation circle for the cleaning of fine coal. Also, more test work seems indicated a various combinations of reagents untried in this work may improve both the grade and recovery of the products from the flotation circle.
|Work Title||INVESTIGATION OF THE CIRCULAR CONCENTRATOR-FLOT A TION CIRCLE SYSTEM FOR CLEANING FINE COAL|
|License||Attribution-NonCommercial-NoDerivs 3.0 United States|
|Deposited||July 27, 2016|
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