有机调整剂DP115添加顺序对Z-200在黄铜矿和闪锌矿表面吸附的影响  

Influence of the Adding Orders of Organic Regulator DP115 on Adsorption of Z-200 on the Surfaces of Chalcopyrite&Sphalerite

作　　者：谭欣 孙传尧 TAN Xin;SUN Chuanyao(BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Processing,Beijing 102628,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《有色金属工程》2024年第7期101-108,共8页Nonferrous Metals Engineering

基　　金：国家重点研发计划项目(2017YFE0133100)。

摘　　要：研究了有机抑制剂DP115(改性聚丙烯酰胺有机大分子)及其与Z-200不同添加顺序对黄铜矿和闪锌矿浮选行为的影响。单矿物浮选试验结果表明,当先加入有机大分子抑制剂DP115时,DP115对闪锌矿有较强的抑制作用,对黄铜矿有轻微的抑制作用;当DP115后于Z-200加入时,对黄铜矿的抑制作用减弱,而对闪锌矿的抑制作用增强。黄铜矿-闪锌矿(1∶1)的二元人工混合矿浮选分离试验结果表明,在相同的浮选条件下,与抑制剂先加相比,抑制剂DP115后于Z-200添加的浮选选择性分离指数提高10.09。人工混合矿浮选分离试验结果与单矿物浮选试验规律有很好的一致性,验证了单矿物的浮选试验结果。吸附量测定结果表明,Z-200强烈吸附在黄铜矿表面,DP115对Z-200在黄铜矿表面吸附的影响较小,而Z-200与闪锌矿表面作用相对较弱,DP115与闪锌矿表面作用较强并通过竞争吸附作用而解吸闪锌矿表面吸附的Z-200。飞行时间二次离子质谱研究表明,与DP115先加时相比,DP115后加时,黄铜矿表面吸附的DP115亲水化合物更少、Z-200更多,而闪锌矿表面吸附的DP115亲水化合物更多、Z-200更少。因此,DP115后于Z-200添加时更有利于铜锌分离。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 DP115 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.

关 键 词：黄铜矿 闪锌矿 Z-200 有机调整剂DP115 加药顺序 吸附 铜锌分离 

分 类 号：TD954[矿业工程—选矿]