CA-1在低品位难选氧化锌矿浮选中的应用
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摘要
某低品位氧化锌矿石含锌2.45%,可通过选矿回收的主要有用矿物是异极矿和菱锌矿,碳酸盐及部分硅酸盐脉石矿物含量高、硬度小,磨矿过程易泥化,属于较难选的氧化锌矿石。使用对石英、钙镁碳酸盐和镁硅酸盐等脉石矿物及矿泥抑制效果显著的六偏磷酸钠和硅酸钠作组合抑制剂,同时使用自主研发的高效氧化矿捕收剂CA-1,降低了泡沫黏度,提高了氧化锌矿物的分选性。釆用不脱泥直接浮选的工艺流程,通过优化浮选的药剂添加制度,闭路试验获得了锌品位32.13%、锌回收率78.76%的氧化锌精矿,实现低品位难选氧化锌矿资源的高效利用。
A low-grade zinc oxide ore with zinc content of 2.45% recover zinc from the main useful minerals-hemimorphite and smithsonite by mineral processing.Moreover,carbonate gangue mineral and part of silicate gangue mineral with low hardness have high content in the ore and are easy to be muddied in grinding process.Thus the ore belongs to refractory zinc oxide ores.Therefore,sodium hexametaphosphate and sodium silicate were taken as a combined depressant,which had a significant inhibitory effect on quartz,calcium magnesium carbonate,magnesium silicate,other gangue minerals and slime.Meanwhile,the self-developed agent CA-1 was used as the efficient collector for oxide ore.It was realized that the viscosity of foam was reduced and the sorted behavior of zinc oxide ore was improved.By using the nondesliming flotation process and optimizing the reagent adding system of flotation,the close circuit test obtained zinc oxide concentrate with Zn grade of 32.13% and recovery rate of 78.76%,achieving efficient utilization of low-grade and refractory zinc oxide ore.
A low-grade zinc oxide ore with zinc content of 2.45% recover zinc from the main useful minerals-hemimorphite and smithsonite by mineral processing.Moreover,carbonate gangue mineral and part of silicate gangue mineral with low hardness have high content in the ore and are easy to be muddied in grinding process.Thus the ore belongs to refractory zinc oxide ores.Therefore,sodium hexametaphosphate and sodium silicate were taken as a combined depressant,which had a significant inhibitory effect on quartz,calcium magnesium carbonate,magnesium silicate,other gangue minerals and slime.Meanwhile,the self-developed agent CA-1 was used as the efficient collector for oxide ore.It was realized that the viscosity of foam was reduced and the sorted behavior of zinc oxide ore was improved.By using the nondesliming flotation process and optimizing the reagent adding system of flotation,the close circuit test obtained zinc oxide concentrate with Zn grade of 32.13% and recovery rate of 78.76%,achieving efficient utilization of low-grade and refractory zinc oxide ore.
引文
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[2]朱从杰.微细粒褐铁矿对菱锌矿浮选的影响研究[J].有色金属(选矿部分),2003(5):18-21,28.
[3]胡岳华,冯其明.矿物资源加工技术与设备[M].北京:科学出版社,2006:267-268.
[4]王洪岭.氧化锌矿浮选工艺及捕收剂研究现状[J].铜业工程,2011(4):12-16.
[5]窦爱春.碱性亚氨基二乙酸盐体系处理低品位氧化锌矿的基础理论及工艺研究[D].长沙:中南大学,2012.
[6]李春林.云南某氧化锌矿的浮选试验研究[D].昆明:昆明理工大学,2014.
[7]LU Yiping,ZHANG Mingqiang,FENG Qiming,et al.Effect of sodium hexametaphosphate on the separation of serpentine from pyrite[J].Transactions of Nonferrous Metals Society of China,2011,21(1):208-213.
[8]FENG Bo,LU Yiping,FENG Qiming,et al.Talc-serpentine interactions and implications for talc depression[J].Minerals Engineering,2012,32(5):68-73.
[9]宋龑,刘全军,常富强.氧化锌矿的浮选现状与研究进展[J].矿冶,2012,21(2):19-22.
[10]刘洋,胡显智,魏志聪.氧化锌矿浮选药剂研究概况[J].矿产保护与利用,2011(1):51-55.
[11]邓海波,张刚,任海洋,等.季铵盐和十二胺对云母类矿物浮选行为和泡沫稳定性的影响[J].非金属矿,2012,35(6):23-25.