含(硫)脲基膦酸酯对白铅矿、方解石和石英的捕收性能

Collecting Performances of Ureidoalkanephosphonates and Thioureidoalkanephosphonates for Cerussite,Calcite and Quartz

合成了α-(3-苯基脲基)烃基膦酸二苯酯和α-(3-苯基硫脲基)烃基膦酸二苯酯2类螯合捕收剂,研究了它们对白铅矿、方解石和石英的捕收能力差异及抑制剂焦性末食子酸和烃基碳链长度对它们浮选3种矿物的影响。结果表明:α-(3-苯基硫脲基)己基膦酸二苯酯对白铅矿的捕收能力强而对方解石和石英的捕收能力弱,α-(3-苯基脲基)己基膦酸二苯酯则仅对石英的捕收能力弱;以前者为捕收剂时焦性末食子酸可选择性抑制方解石和石英,而以后者为捕收剂时3种矿物均被焦性末食子酸抑制。对于白铅矿,2类捕收剂都是烃基碳链越长,捕收能力越强;烃基为己基时2种捕收剂的捕收能力相近,但烃基为丁基和乙基时含脲基者的捕收能力远低于含硫脲基者。

The chelating collectors of diphenyl α-（3-phenylureido） alkanephosphonate and diphenyl α-（3-phenyhhio- ureido） alkanephosphonate were synthesized. The difference in their collecting ability tor cerussite, calcite and quartz and the effect of the depressor function of pyrogallic acid and their hydrocarbon radical length on the flotation of the three minerals were investigated. The results indicate that the collecting ability of diphenyl α-（3-phenyhhioureido） hexylphosphonate for cerussite is stronger than for calcite and quartz while that of diphenyl α-（3-phenylureido） hexylphosphonate is only weak for quartz. When the former is used as collector, pyrogallic acid can selectively depress calcite and quartz, but if the latter is used as collector, all three minerals will be depressed by pyrogallic acid. The longer their hydrocarbon radical length is, the stronger will be the collecting power of both collectors tor cerussite. When the hydrocarbon radical is of hexyl type, the two collectors have a similar collecting power. But when it is of butyl or ethyl type, the collector containing ureido radical has a collecting power much lower than that of the collector containing thioureido radical.