摘要
考查了4种具有代表性的螯合捕收剂GYB及脂肪酸类捕收剂NaOL,HPC,731及其组合使用对黑钨矿单矿物的浮选作用规律。单一捕收剂浮选黑钨矿试验结果表明,NaOL最佳浮选pH为较窄的碱性区间,GYB,HPC,731最佳浮选pH区间较为接近,均为弱酸至弱碱性。组合捕收剂浮选试验结果表明,螯合剂GYB与脂肪酸类捕收剂NaOL,731,HPC的组合使用,增强了对黑钨矿的捕收能力,其中GYB起辅助作用,在低用量下就可产生较明显的协同作用。当cGYB∶cHPC∶c731=1∶6∶3时为最佳,不仅提高了对黑钨矿的捕收能力,还拓宽了黑钨矿的浮选pH区间,使黑钨矿在pH为4～10之间均表现出较好的可浮性。通过黑钨矿表面润湿性测试、疏水聚团行为研究,探讨了组合捕收剂对黑钨矿疏水行为的影响。黑钨矿表面疏水性测试结果表明:经组合捕收剂作用后,黑钨矿表面接触角更大,且当cGYB∶cHPC∶c731=1∶6∶3,pH为6.50左右时,接触角增大至82.8°,疏水聚团更大、更紧密。
The action law of wolframite as functions of four coUectors and combinative collectors which were chelating collector GYB and fatty acid collectors NaOL, HPC ,731 was investigated by flotation experiments of pure mineral. Experimental results of wolframite flotation by single collector showed that the best flotation pH interval of NaOL was narrowed in alkalinity and the best flotation pH of GYB, HPC,731 approximated from weak acidic to weak alkaline interval. Experimental results of wolframite flotation by combinative collector showed the collecting capability to wolframite was enhanced with the combinative of chelating collector GYB and fatty acid col- lectors NaOL,HPC and 731 ,in which GYB played a supporting role and obvious synergistic effect made by low dosage. When cGYB：cHPC：c731=1：6：3, the best collecting ability was gained and the flotation pH interval of wolframite was broaden in 4 - 10 with better float- ability. Influence research on wolframite hydrophobic behavior by combinative collectors was discussed as functions of surface wettability measurements and hydrophobic aggregation behavior. Results of surface hydrophobic properties measurement of wolframite showed that the contact angle of wolframite was bigger and increased to 82.8°with cGYB：cHPC：c731=1：6：3 and pH ≈ 6.5, the enhancement of surface hydrophobicity and the aggregation was bigger and tighter.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2012年第6期973-978,共6页
Chinese Journal of Rare Metals
基金
国家科技部国家重点基础研究发展规划项目"973项目"(2010CB735500)资助
关键词
组合捕收剂
黑钨矿
疏水行为
combination collectors
wolframite
hydrophobic behavior
