Influence of the Adding Orders of Organic Regulator DP115 on Adsorption of Z-200 on the Surfaces of Chalcopyrite & Sphalerite
The effect of organic depressant DP115(modified polyacrylamide)on the flotation of chalcopyrite and sphalerite was investigated using micro-flotation tests,and different added orders of DP115 and Z-200 were also studied.When DP115 is added first,its depression effect on sphalerite is considerable strong,but weak on chalcopyrite.When Z-200 is added first,DP115 has little depression effect on chalcopyrite flotation,whereas still strongly depresses sphalerite.The results of flotation tests on artificially mixed sample of minerals showed that for chalcopyrite-sphalerite(1∶1)artificially mixed sample using Z-200 and DP115 as collector and regulator respectively,under the same flotation conditions,the selective separation index increased by 10.09 when the DP1 15 was added after Z-200,compared with that when the DP115 was added before Z-200.The results of the flotation separation of artificially mixed samples were in good agreement with those of single mineral flotation test,which verified the results of flotation separation of single minerals.The interaction between DP115 and Z-200 on the sulfide surface was studied by adsorption measurement.It is indicated that the Z-200 strongly absorbs on the chalcopyrite surface,and DP115 has little impact on the adsorption of Z-200 on the chalcopyrite surface,while the adsorption of Z-200 on the sphalerite surface is weak,and the competitive adsorption between DP115 and Z-200 adsorbed on the surface of sphalerite results in the desorption of Z-200 on the sphalerite surface.Time of flight secondary ion mass spectrometry(ToF-SIMS)analysis suggests that as compared to the addition first of DP115,less DP115 and more Z-200 are adsorbed on the chalcopyrite surface,while more DP115 and less Z-200 are adsorbed on the sphalerite surface,when Z-200 is added first,and so as to be more useful to realize the flotation separation of Cu-Zn.
chalcopyritesphaleriteZ-200organic regulator DP115addition order of reagentsadsorptionCu-Zn flotation separation
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