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Gold Science and Technology >

2023 , Vol. 31 >Issue 2: 340 - 348

DOI: https://doi.org/10.11872/j.issn.1005-2518.2023.02.160

Metallurge and Equipment

Study on the Adsorption and Wettability of CN- on the Surface of Typical Gangue Minerals

  • Qianfei ZHAO , 1, 2 ,
  • Hongying YANG , 1, 2 ,
  • Linlin TONG 1, 2
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  • 1. Key Laboratory for Ecological Metallurgy of Multimetallic Minerals (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China
  • 2. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

Received date: 2022-10-30

  Revised date: 2023-01-09

  Online published: 2023-04-27

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Highlights

In recent years，with the continuous depletion of shallow mineral resources，there are many theoretical and practical studies on the recovery and utilization of sulfide ores in cyanide tailings.However，the existence of floatable gangue will hinder the recovery of sulfide ore in cyanide tailings.Therefore，it is very important to find out the adsorption mechanism of CN- on the surface of gangue minerals and the change of surface wettability to identify the cause of low flotation recovery of cyanide tailings.In this paper，three typical gangue minerals，quartz，feldspar and calcite，were used as adsorbent，and NaCN was used as adsorbent.The influence of adsorption time and amount of adsorbent on the adsorption effect of CN- were investigated.At the same time，the wettability difference before and after the adsorption of CN- on the surface of gangue minerals was analyzed by using the contact angle detection method of solid droplet，and the adsorption kinetic model was fitted for the adsorption results.The results show that quartz，feldspar and calcite exhibit different degrees of adsorption and selectivity for CN-.When the mineral dosage was 5 g and the contact time was 12 h，the adsorption rate of CN- tend to be stable.At this time，the adsorption rates of quartz，feldspar and calcite for CN- are 43.9%，58.0% and 43.6%，respectively.Through kinetic study，it is found that the adsorption of CN- by quartz and feldspar is mainly physical adsorption.There is binding adsorption between CN- and calcite.Finally，according to the contact angle detection，the adsorption of CN- resulted in the enhancement of the surface hydrophilicity of gangue minerals，and the surface contact angles of quartz，feldspar and calcite decreased from 38.5°，15.6° and 35.4° to 18.6°，14.4° and 20.6°.After the action of SBX flotation reagent，the surface contact angle of gangue minerals increase，but still showes hydrophilic properties.It shows that cyanidation will not cause the following flotation of non-target minerals when recovering sulfide ores from cyanide tailings flotation，which provides theoretical guidance for achieving efficient separation and flotation of metal sulfide ores in cyanide tailings.

Cite this article

Qianfei ZHAO , Hongying YANG , Linlin TONG . Study on the Adsorption and Wettability of CN- on the Surface of Typical Gangue Minerals[J]. Gold Science and Technology, 2023 , 31(2) : 340 -348 . DOI: 10.11872/j.issn.1005-2518.2023.02.160

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我国调整完善矿业权出让收益征收办法

2023年4月14日，财政部、自然资源部、税务总局联合印发《矿业权出让收益征收办法》（以下简称《办法》），旨在进一步健全矿产资源有偿使用制度，规范矿业权出让收益征收管理，维护矿产资源国家所有者权益，促进矿产资源保护与合理利用，推动相关行业健康有序发展。《办法》完善了矿业权出让收益征收方式，将现行对绝大多数矿种在出让环节“一次性趸交”，调整为对144个矿种按“成交价+逐年按率征收”。

据悉，矿业权出让收益是国家基于自然资源所有权，依法向矿业权人收取的国有资源有偿使用收入。矿业权出让收益包括探矿权出让收益和采矿权出让收益，原则上按照矿业权属地征收。

《办法》规定了2种矿业权出让收益征收方式，分别是按矿业权出让收益率形式征收或按出让金额形式征收。

《按矿业权出让收益率形式征收矿业权出让收益的矿种目录（试行）》（以下简称《矿种目录》）内的矿种，按矿业权出让收益率形式征收矿业权出让收益。其中，以竞争方式出让探矿权、采矿权的，在出让时征收竞争确定的成交价；在矿山开采时，按合同约定的矿业权出让收益率逐年征收采矿权出让收益。矿业权出让收益率依据《矿种目录》规定的标准确定。以协议方式出让探矿权、采矿权的，成交价按起始价确定，在出让时征收；在矿山开采时，按矿产品销售时的矿业权出让收益率逐年征收采矿权出让收益。

《矿种目录》外的矿种，按出让金额形式征收矿业权出让收益。其中，以竞争方式出让探矿权、采矿权的，矿业权出让收益按竞争结果确定。以协议方式出让探矿权、采矿权的，矿业权出让收益按照评估值、矿业权出让收益市场基准价测算值就高确定。按出让金额形式征收的矿业权出让收益，可分期缴纳，首次征收比例不得低于探矿权、采矿权出让收益的10%且不高于20%。

据介绍，《矿种目录》收录了173个矿种中具有重要战略作用、勘查风险较高、对产业链影响较大的144个矿种，包括所有的能源、金属、宝玉石、水气和大部分非金属矿种。《矿种目录》所列矿种的出让收益率由自然资源部和财政部联合制定。

针对新旧政策衔接，《办法》分2017年7月1日以前、2017年7月1日至本办法实施之日和本办法实施之日后3个时间段，对是否涉及国家出资探明矿产地以及是否在《矿种目录》内，分别进行了细化规定。

《办法》自2023年5月1日起实施，《矿业权出让收益征收管理暂行办法》（财综〔2017〕35号）《财政部自然资源部关于进一步明确矿业权出让收益征收管理有关问题的通知》（财综〔2019〕11号）同时废止。

http://www.goldsci.ac.cn/article/2023/1005-2518/1005-2518-2023-31-2-340.shtml

References

Publishing order | Descend order by publishing year | Descend order by cited within
Ai G H， Yan H S， Qiu T S，et al，2018.Activating flotation of chalcopyrite using CuSO4 and H2O2 from the cyanide tailings［J］.Physicochemical Problems of Mineral Processing，54（2）：578-589.

Chen T T， Cabri L J， Dutrizac J E，2002. Characterizing gold in refractory sulfide gold ores and residues［J］.JOM，54（12）：20-22.

Deng Y J， Xu L， Lu H L，et al，2018.Direct measurement of the contact angle of water droplet on quartz in a reservoir rock with atomic force microscopy［J］.Chemical Engineering Sci-ence，177：445-454.

Dizge N， Demirbas E， Kobya M，2009.Removal of thiocyanate from aqueous solutions by ion exchange［J］.Journal of Ha-zardous Materials，166（2/3）：1367-1376.

Dong K W， Xie F， Wang W，et al，2021.The detoxification and utilization of cyanide tailings：A critical review［J］.Journal of Cleaner Production，302：126946.

Huang H， Fan Y F， Wang J W，et al，2013.Adsorption kinetics and thermodynamics of water-insoluble crosslinked β-cyclodextrin polymer for phenol in aqueous solution［J］.Macromolecular Research，21（7）：726-731.

Jannah Sulaiman N， Mansor A F， RahmanR A，et al，2019.Adsorption kinetics of cellulase and xylanase immobilized on magnetic mesoporous silica［J］.Chemical Engineering and Technology，42（9）：1825-1833.

Li J Y， Hua Q X， Niu J L，et al，2011.Adsorption equilibrium and kinetics of copper from aqueous solutions on steel slag［J］.Advanced Materials Research，354/355：33-36.

Liu Shujie， Dai Shujuan， Li Pengcheng，2020.Effect of calcination on the interaction between quartz and gold cyanide［J］.Non-Metallic Mines，43（1）：68-72.

Mohammadnejad S， Provis J L， van Deventer J S J，2011.Gold sorption by silicates in acidic and alkaline chloride media［J］.International Journal of Mineral Processing，100（3/4）：149-156.

Rao S H， Deng Y J， Cai W J，et al，2021.Study of the contact angle of water droplet on the surface of natural K-feldspar with the combination of Ar+ polishing and atomic force microscopy scanning［J］.Chemical Engineering Science，241：116705.

Song Yan， Yang Hongying， Tong Linlin，et al，2018.Experimental study on bacterial oxidation-cyanidation of a complex re-fractory gold mine in Gansu Province［J］.Gold Science and Technology，26（2）：241-247.

Sun Q Y， Yin W Z， Cao S H，et al，2019.Adsorption kinetics and thermodynamics of sodium butyl xanthate onto bornite in flotation［J］.Journal of Central South University，26（11）：2998-3007.

Taraba B， Bulavová P，2022.Second or pseudo-second-order model for adsorption kinetics？［J］.Separation Science and Technology，57（10）：1558-1562.

Xu S H， Cheng D B， Skinner W，et al，2020.Application of ToF-SIMS to predict contact angles of pyrite particles［J］.Minerals Engineering，147：106168.

Yang X L， Huang X， Qiu T S，2015.Recovery of zinc from cyanide tailings by flotation［J］.Minerals Engineering，84：100-105.

Yazdani M R， Tuutijärvi T， Bhatnagar A，et al，2016.Adsorptive removal of arsenic（V） from aqueous phase by feldspars：Kinetics，mechanism and thermodynamic aspects of adsorption［J］.Journal of Molecular Liquids，214：149-156.

Yin Yulan， Chen Junhong， Xie Yan，et al，2022.Adsorption of F- on calcite surface and its effect on calcite surface properties［J］.Bulletin of the Chinese Ceramic Society，41（8）：2785-2791.

Yu Zheng， Wang Qiong， Huang Jun，et al，2022.Adsorption equilibrium，kinetics and mechanism studies of copper and nickel on coal-fired fly ash［J］.Coal Processing and Comprehensive Utilization，（3）：91-95.

Zhang X Q， Qin Y Z，2019.Contact angle hysteresis of a water droplet on a hydrophobic fuel cell surface［J］.Journal of Colloid and Interface Science，545：231-241.

刘淑杰，代淑娟，李鹏程，2020.焙烧对石英与氰化金相互作用的影响［J］.非金属矿，43（1）：68-72.

宋言，杨洪英，佟琳琳，等，2018.甘肃某复杂难处理金矿细菌氧化——氰化实验研究［J］.黄金科学技术，26（2）：241-247.

殷玉兰，陈俊宏，谢燕，等，2022.F-在方解石表面的吸附及其对方解石表面性质的影响［J］.硅酸盐通报，41（8）：2785-2791.

于峥，王琼，黄俊，等，2022.粉煤灰对水中铜镍的吸附平衡、动力学及机理研究［J］.煤炭加工与综合利用，（3）：91-95.

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