萘磺酸钠对硫化铅锌矿中碳质物的选择性抑制  

Selective inhibition of carboniferous species in lead-zinc sulfide ores by sodium 2-naphthalene sulfonate

作　　者：曹正强 刘润清[1] 李杰 唐鸿鹄[1] 孙伟[1] CAO Zhengqiang;LIU Runqing;LI Jie;TANG Honghu;SUN Wei(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《中国有色金属学报》2024年第6期2059-2071,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(52174272)。

摘　　要：针对硫化铅锌矿中碳质物吸附浮选药剂、恶化浮选效果的问题,本文以隐晶质石墨为难浮碳质物,研究了抑制剂萘磺酸钠(2-NSS)对方铅矿、闪锌矿以及隐晶质石墨浮选行为的影响。结果表明:2-NSS对难浮碳质物石墨具有明显的抑制作用。加入2-NSS后,方铅矿品位从82.28%提高至85.93%,回收率从82.08%提高至97.06%;闪锌矿品位从61.19%提高至63.48%,回收率从89.31%提高至93.46%。接触角试验、红外光谱分析、吸附量测试、浮选泡沫分析等结果表明:2-NSS易吸附于石墨表面,难吸附于铅锌硫矿物表面,2-NSS吸附于石墨表面后,能减弱捕收剂异丁基黄原酸钠(SIX)在石墨表面的吸附,减少药剂消耗,浮选泡沫更稳定。DFT模拟分析结果表明:2-NSS主要通过π-π堆积作用吸附于石墨表面。Carboniferous species in lead-zinc sulfide ores can adsorb flotation reagents and seriously affect the mineral flotation.In this study,the effects of sodium 2-naphthalenesulfonate(2-NSS) on the flotation of galena,sphalerite and graphite were investigated.The flotation results show that 2-NSS can inhibit the flotation of refractory carboniferous species.After adding 2-NSS,the grade of galena changes from 82.28% to 85.93%,and the recovery rate changes from 82.08% to 97.06%,the grade of sphalerite changes from 61.19% to 63.48%,and the recovery rate changes from 89.31% to 93.46%.Contact angle test,infrared spectral analysis,adsorption test and flotation froth analysis results reveal that 2-NSS can easily be adsorbed on the surface of graphite and difficultly be adsorbed on the surface of galena and sphalerite.The adsorption on the graphite surface can weaken the adsorption of collectors,reduce the consumption of chemicals,and the flotation froth is more stable.The DFT calculations show that 2-NSS is adsorbed on the surface of graphite mainly through π-π stacking.

关 键 词：石墨 萘磺酸钠 Π-Π堆积作用 浮选泡沫 

分 类 号：TD952[矿业工程—选矿]