Dry ore grinding and beneficiation device and process for iron ores

The invention belongs to the technical field of metal ore grinding processes, and particularly relates to a dry ore grinding and beneficiation device and process for iron ores. Raw ores can be treatedto ores below 80 mm through coarse crushing, pre-tailing-discarding and the like of equipment such a...

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Bibliographische Detailangaben
Hauptverfasser:	SONG LIUQING, NIE WENHAI, XU DARONG, LIU YANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CRUSHING, PULVERISING, OR DISINTEGRATING CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS MILLING GRAIN OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL PERFORMING OPERATIONS PREPARATORY TREATMENT OF GRAIN FOR MILLING SEPARATING SOLIDS FROM SOLIDS SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS SORTING TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention belongs to the technical field of metal ore grinding processes, and particularly relates to a dry ore grinding and beneficiation device and process for iron ores. Raw ores can be treatedto ores below 80 mm through coarse crushing, pre-tailing-discarding and the like of equipment such as a gyratory crusher, a cone crusher, a magnetic separator and the like, the ores are crushed by avertical roller mill which replaces conventional multi-stage ore grinding equipment, a closed-loop grinding and magnetic separation system is formed by cooperation with a huge micro-powder screening machine and a plurality of magnetic separators, the ores are crushed until P80 is less than or equal to 2 mm, magnetic ores are highly dissociated from the tailings, the selection rate is greatly improved, and the section finally obtains the concentrate and the tailings; and fine grinding of rich ores at a fine grinding section is completed by a closed-loop fine grinding system, the fineness can reach P80=200-400 meshes, th