白钨矿捕收剂FX-6的浮选作用机制研究  

Flotation Mechanism of Scheelite Collector FX-6

作　　者：张政权 焦芬[1] 覃文庆[1] 李茂林[2] 王旭[1] 李卫 Zhang Zhengquan;Jiao Fen;Qin Wenqing;Li Maolin;Wang Xu;Li Wei(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Changsha Research Institute of Mining and Metallurgy Co.,Lud.,Changsha 410012,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《稀有金属》2021年第4期446-454,共9页Chinese Journal of Rare Metals

基　　金：中南大学研究生科研创新项目(2019zzts696);中南大学研究生科研创新项目(2018zzts224);湖南省战略含钙矿产资源清洁高效利用重点实验室项目(2018TP1002)资助。

摘　　要：以常规白钨矿捕收剂油酸钠(NaOL)作为参照,对白钨捕收剂FX-6的性能和作用机制进行研究。首先通过单矿物浮选试验和人工混合矿浮选分离试验分别考查FX-6对3种含钙矿物的捕收能力和选择性,然后对江西修水香炉山钨矿白钨矿浮选原矿进行浮选试验,对FX-6的实际使用效果进行研究。最后,通过红外光谱检测和药剂吸附量测定,对FX-6的作用机制进行初步的探讨。试验结果表明,在pH=9.5±0.1,捕收剂FX-6浓度(CFX-6)为150 mg·L^(-1)的条件下,FX-6的捕收能力大小顺序为:白钨矿>萤石>方解石;在硅酸钠作抑制剂的浮选体系下,白钨矿与萤石可以实现高效的分离,混合矿中含有方解石时,分离效果一般。针对香炉山白钨矿,选用FX-6作捕收剂时,取得了最终白钨精矿WO_(3)含量69.86%,回收率89.95%的良好指标。FX-6在白钨矿表面产生较强化学吸附,在较宽的pH值范围内,FX-6都能有效吸附在白钨矿表面;硅酸钠会影响捕收剂在矿物表面的吸附,从而强化3种含钙矿物的浮选分离。FX-6对原矿中萤石含量较高的白钨矿分选具有较大的潜力;同时,为香炉山白钨矿浮选提供了一种捕收剂选择。The flotation mechanism of the common collector FX-6 in scheelite has not been elucidated.In this paper,the flotation performance of the collector FX-6 and sodium oleate(NaOL)on scheelite,fluorite and calcite were studied,and the real ore experiments on the scheelite was investigated.The flotation behavior of scheelite,fluorite and calcite using FX-6 as the collector was studied through single-mineral flotation tests and the artificial mixed flotation of three calcium-containing minerals.The results showed the collecting capacity and selectivity of the collector FX-6 and was compared with that of NaOL.Through infrared spectroscopy and according to the position of the characteristic peaks of the functional groups of each agent,the adsorption forms of FX-6 and NaOL on the surface of scheelite,fluorite,and calcite were characterized.And the physical adsorption or chemical adsorption was determined by the infrared spectroscopy.According to the Lambert-Beer law,the residual concentration method was used to determine the adsorption capacity on the surface of the mineral,and the adsorption capacity of FX-6 and NaOL on scheelite,fluorite and calcite under different pH conditions was calculated according to the standard curve.Finally,FX-6 and NaOL were used in the flotation separation test of Xianglushan tungsten mine in Xiushui,Jiangxi,and the application effect was investigated.The micro-flotation test showed that FX-6 had a stronger collecting capacity than NaOL without depressant,and the suitable pH for scheelite flotation was wider.However,it was difficult to effectively separate scheelite from fluorite and calcite in the absence of depressant.In the system of sodium silicate as the depressant,the inhibition effect of sodium silicate on fluorite was the strongest,followed by calcite,and the inhibition effect of scheelite was relatively weak at pH 9.5±0.1.Fluorite was almost completely inhibited,followed by calcite and scheelite when the concentration of sodium silicate was 6×10^(-3) mol·L^(-1 )and the concentratio

关 键 词：FX-6 白钨矿 含钙矿物 浮选 

分 类 号：TD923[矿业工程—选矿]