| Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
ZHONG Hong, ZHANG Xiangyu, MA Xin, WANG Shuai. Study on the Preparation of Amido Xanthate and Its Flotation Performance for Chalcopyrite and Pyrite[J]. Conservation and Utilization of Mineral Resources, 2021, 41(2): 13-22. doi: 10.13779/j.cnki.issn1001-0076.2021.02.003
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Study on the Preparation of Amido Xanthate and Its Flotation Performance for Chalcopyrite and Pyrite
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Abstract
Based on the molecular design theory of flotation reagents and the structural theory of odor molecules, two amide xanthates—potassium potassium O-(2-acetamidoethyl) carbonodithioate and potassium O-(2-benzamidoethyl) carbonodithioate were designed and synthesized and their structure were characterized.These double ligand xanthates containing amido and xanthate groups were prone to produce hydrogen bond between the molecules, and the interaction between the double ligands could weaken the orienting effect of odor molecules on the surface of the olfactory receptors, thereby eliminating the malodor. The synthesis test showed that both potassium O-(2-acetamidoethyl) carbonodithioate and potassium O-(2-benzamidoethyl) carbonodithioate had no pungent odor of traditional xanthate.The single mineral flotation test demonstrated that the collection performance of potassium O-(2-benzamidoethyl) carbonodithioate was similar to that of ethyl xanthate, but better than that of potassium O-(2-acetamidoethyl) carbonodithioate, and the collection performance of pyrite was weaker than that of ethyl xanthate and stronger than that of potassium O-(2-acetamidoethyl) carbonodithioate.The adsorption capacity test showed that the order of the adsorption amount of the three collectors on the surface of chalcopyrite was consistent with the single mineral flotation results.The results of Zeta potential and infrared spectroscopy further indicated that the amido xanthate collector were chemically adsorbed on the surfaces of chalcopyrite and pyrite.
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Keywords:
- amide xanthate /
- flotation /
- chalcopyrite /
- pyrite /
- DFT calculation
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References
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ZHONG Hong, ZHANG Xiangyu, MA Xin, WANG Shuai. Study on the Preparation of Amido Xanthate and Its Flotation Performance for Chalcopyrite and Pyrite[J]. Conservation and Utilization of Mineral Resources, 2021, 41(2): 13-22. doi: 10.13779/j.cnki.issn1001-0076.2021.02.003
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Figure 1.
XRD patterns of chalcopyrite (a) and pyrite (b)
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Figure 2.
The optimal structure of O-(2-benzamidoethyl) carbonodithioate ion(a), O-(2-acetamidoethyl) carbonodithioate ion(b), and ethyl xanthate ion(c)ion at the level of DFT/B3LYP6-311G+(d)
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Figure 3.
HOMO and LUMO of O-(2-benzamidoethyl) carbonodithioate ion(a), O-(2-acetamidoethyl) carbonodithioate ion(b), and ethylxanthogenate(c)ion at the level of DFT/B3LYP6-311G+ (d) figure
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Figure 4.
FTIR spectra of potassium O-(2-acetamidoethyl) carbonodithioate (a) potassium O-(2-benzamidoethyl) carbonodithioate (b)
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Figure 5.
1H NMR spectrum(a) and 13C NMR spectrum(b) of potassium O-(2-acetamidoethyl) carbonodithioate
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Figure 6.
1H NMR spectrum(a) and 13C NMR spectrum(b) of potassium O-(2-benzamidoethyl) carbonodithioate
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Figure 7.
Mass recovery in the flotation of pure chalcopyrite (a) and pyrite (b) as a function of the pulp pH(Ccollector=20mg/L, CMIBC=8mg/L)
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Figure 8.
Mass recovery in the flotation of pure chalcopyrite (a) and pyrite (b) as a function of the collector dosage at a pulp pH of 8(CMIBC=8mg/L)
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Figure 9.
Adsorption amount of collectors on chalcopyrite surface as a function of treatment time
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Figure 10.
Zeta potential of chalcopyrite(a) and pyrite(b) particles with and without potassium O-(2-benzamidoethyl) carbonodithioate
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Figure 11.
FTIR spectra of single mineral before and after interaction with collector: (a) chalcopyrite, and (b) pyrite