Copper-nickel ore beneficiation plant in Finland may Tuolan Di treated mainly containing nickel is a nickel pyrite, nickel-containing magnetite. Copper minerals are chalcopyrite. Gangue minerals amphibole, plagioclase, mica and quartz. The process of the plant is shown in Figure 1.
Figure 1 Finland Fantranti copper-nickel ore flotation process
In the copper-nickel mixed flotation, adjust the pH and inhibit the silicate gangue with sulfuric acid (6.4 kg/t), the xanthate (60 g/t) as the collector, and the coarse pine oil (290 g/t). Foaming agent. When separating copper and nickel, use lime (1kg/t) plus dextrin (25 g/t) to suppress nickel minerals. The main feature of the process is that the inhibition of nickel minerals, according to the difference in floatability, is carried out according to the mineral component, that is, the nickel-bearing pyrite is first suppressed, and the nickel pyrite is further suppressed. The indicators obtained are as follows:
grade/% | Recovery rate/% | |||
Cu | Ni | Cu | Ni | |
Nickel concentrate Copper concentrate Tailings Raw ore | 0.7 29.26 0.04 0.26 | 5.84 1.19 0.042 0.69 | 29.8 62.3 7.9 100 | 93.6 1.0 5.4 100 |
Due to the complex mineral composition, it is difficult to separate the copper-nickel mixed concentrate by the general method. In recent years, research and practice have proved that it is more effective to use lime + steam heating method. The former Soviet Union Norilsk beneficiation, at the same time processing the dip mine and vein ore two ore, due to the complex mineral composition, various mineral forms, the same mineral has several kinds of crystal deformation, so the separation of copper and nickel mixed concentrate with lime, sulfite Both the thiosulfate and the thiosulfate did not give satisfactory results.
The wide use of lime + steam heating method, while adding lime, steam is introduced. The temperature of the slurry accelerates the desorption of the collector from the surface of the nickel mineral and the pyrrhotite, and forms a relatively stable oxide film on the surface of these minerals to enhance their inhibition. For the amount of lime, for the impregnated ore, the free CaO content in the slurry is required to be 600-800 g/m 3 ; the vein ore is 200-300 g/m 3 . When the steam is warmed, the slurry temperature is 70 ° C, the heating time is 12-15 min, and the pulp concentration is 40% solid. After the slurry is warmed, it is diluted to about 32% solids for "fast" flotation of copper, and the tailings are nickel concentrate. The foam product is graded and ground to float copper to obtain copper concentrate, and the tailings are nickel concentrate.Holiday Decorations,Glass Christmas Ornaments,Seasonal Easter Glitter Eggs,Festival Accessories Handmade Crafts
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