PROCESS OF LEACHING A LATERITIC ORE FOR PREPARING METAL EXTRACTION

摘要

THE STARTING MATERIAL IS LATERITIC ORE HIGH CONTAINS NICKEL OXIDE AND/OR COBALT OXIDE. FROM WATER AND COMMINUTED ORE, OF WHICH AT LEAST 80-WTHAVE GRAIN SIZES OF NOT MORE THAN 0.5 NM, A PUMPABLE SUSPENSION IS FORMED. THE ORE-CONTAINING SUSPENSION IS PASSED THROUGH AN INDIRECTLY HEATED PREHEATING TUBE, THE SUSPENSION BEING HEATED TO 150 TO 250°C. THE HEATED PREHEATING TUBE, THE SUSPENSION IS PASSED THROUGH A MIXING LINE IN WHICH AN ACID IN A MINIMUM AMOUNT OF 10KG PER 100KG ORE, CALCULATED ANHYDROUS, IS ADMIXED TO THE SUSPENSION AND THE ACID-CONTAINING SUSPENSION IS PASSED THROUGH AD WELL TIME TUBE IN WHICH THE DWELL TIME OF THE SUSPENSION IS AT LEAST 0.1 MINUTES. PREFERABLY, SULFURIC ACID IS INTRODUCED INTO THE MIXING LIUNE.@@FIGURE 1