Dewatering of coal flotation concentrate - via double flotation process for efficient removal of fine waste

After leaving a flotation plant, 0.3 wt.% max. of oil, w.r.t. the wt. of solids, is mixed with the concentrate, and the mixt. is fed into a centrifuge. The liq. suspension leaving centrifuge is subjected to a second flotation, followed by further removal of water. Flotation agents may or may not be...

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Bibliographische Detailangaben
Hauptverfasser:	VON ESSEN,ULRICH, SCHOUTERDEN,ETIENNE, STRAGGIER,CARLOS, MOSSELAER,FRANS VAN DE, SCHIELE,HERBERT, SCHLEBUSCH,LUDWIG,DR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	DIFFERENTIAL SEDIMENTATION FLOTATION MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS PERFORMING OPERATIONS SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS TRANSPORTING
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Beschreibung
Zusammenfassung:	After leaving a flotation plant, 0.3 wt.% max. of oil, w.r.t. the wt. of solids, is mixed with the concentrate, and the mixt. is fed into a centrifuge. The liq. suspension leaving centrifuge is subjected to a second flotation, followed by further removal of water. Flotation agents may or may not be added prior to the second flotation; and the liq. concentrate leaving the second flotation may be recycled to centrifuge. The pref. plant includes a first flotation stage removing waste or deads to obtain a concentrate mixed with 0.05-0.3% oil and fed into centrifuge, from which the solids travel to another centrifuge but the liq. phase flows to a second flotation unit. High flow rates can be used, and the oil consumption is reduced.