Copper And Zinc Refractory Sulfide Ore Efficient Flotation Separation Of Theory And Application

Separation copper and zinc sulfide ore can be difficult due to the sphalerite activated by dissolution copper ions. The activated sphalerite has the same floatability as chalcopyrite. Strengthen collect the chalcopyrite and depressing sphalerite as well as sorting process improvement mainly methods to solve the problem. And use the differences in chalcopyrite and sphalerite surface properties, synthesis and preparation collector has ability collect chalcopyrite and weak collect sphalerite is a very important way.A new chalcopyrite collector QP-02 has been synthesized. QP-02 can quickly collect chalcopyrite while has weak ability for sphalerite. Using differential flotation parts chalcopyrite, mill rough copper concentrate and copper middles flotation zinc, the process can efficiently and clean separate this type of copper-zinc sulfide ore. Close experiment got the copper concentrate has grade 26.74%, copper recovery 90.80% and zinc concentrate has grade 45.20%, znic recovery 81.57%.In this paper the flotation kinetics of chalcopyrite and sphalerite also has been studied in QP-02 flotation system. The result shows the flotation rate of chalcopyrite significantly faster than sphalerite. Compared with the traditional xanthate, QP-02 also has the advantages of fast flotation speed. The kinetics equation of chalcopyrite in QP-02 flotation system is While the kinetics equation of sphalerite isInfrared spectroscopy and quantum chemical calculations have been used to study the adsorption mechanism of chalcopyrite with QP-02. Infrared spectroscopy shows QP-02 occurred chemical absorption through C=S band. The intensity of sphalerite surface with the QP-02 is weak. The molecular parameter (surface net charge, highest occupied molecular orbital and lowest unoccupied molecular orbital) of QP-02 has been calculated using quantum chemistry. The study found that QP-02 have weak ability to provide electronic to sulfide ore. When the QP-02 approach to the surface chalcopyrite then the thio-carbonyl sulfur atom transfer the electrons to the copper ions. Get electrons copper turn their excess electron to the empty track of QP-02, then the reaction enhanced.