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Example of flotation reagent system for copper-cobalt ore
Cobalt sulphide and arsenic often exist in the compounds. The cobalt-containing minerals are: pyrite containing cobalt, arsenic luminance cobaltite (CoAsS), cobalt ore sulfur (Co 3 S 4) and the like, in addition to sulfur, nickel and cobalt ore [(NiCo) 3 S 4] , sulfur and copper Cobalt ore (Co 2 CuS 4 ) and the like.
A copper-cobalt type is disseminated veinlets copper-cobalt ore mineral composition is relatively simple, in addition to cobalt-containing pyrite, chalcopyrite and pyrrhotite portion, other rare metal minerals. Non-metallic minerals are quartz, calcite, sericite and so on. The average grade of the mineral stone 4% sulfur, 0.8% copper, 0.02% cobalt oxide is low, is easy to sulfur ores. The mine selection plant uses preferential float copper, and the copper tailings are dewatered by a thickener and then cobalt (yellow cobalt iron ore) is recycled to recover copper and cobalt.
The characteristics of the plant flotation are:
(1) The copper flotation cycle adopts separate selection processes, that is, the coarse concentrates from the two slots of the rough selection head are separately selected once to obtain the final copper concentrate, and the coarse concentrates which are later emerged are selected twice to obtain the final fine. mine.
(2) Separation of copper-cobalt pyrite with the selective collector ether thiourethane (collector 234) and the foaming agent phenethyl ester, compared with the original butyl sulphate and pyridine Under the premise of maintaining the copper index, the cobalt recovery rate is increased by about 10%, the lime consumption is reduced from 4kg/t to 2~3kg/t, and the cobalt is not activated by sulfuric acid. The selection criteria for the new pharmacy program in the plant are:
Raw ore grade /%
Concentrate grade /%
Recovery rate/%
copper
cobalt
0.7~0.9
0.02
16~18
0.3~0.4
95~96
50~60