摘要
研究了油酸钠、731、苯甲羟肟酸、C7～9羟肟酸等几种代表性捕收剂对褐铁矿、萤石、高岭土、石英等纯矿物的浮选。结果表明:油酸钠是褐铁矿的良好捕收剂,当油酸钠用量为3×10-4mol/L,pH值为6.5～10.5时,褐铁矿可浮性最好。机理研究表明:在试验pH值范围内,油酸钠在褐铁矿表面产生了显著的吸附,表面零电点由pH=8.0左右漂移至pH=3.0左右。在pH=2.0～4.0的范围内,油酸根在褐铁矿表面发生静电吸附,油酸分子在褐铁矿表面以氢键作用为主;当pH=4.0～10.5时,油酸根与褐铁矿表面铁质点间以化学作用为主,红外光谱分析显示其作用产物为油酸铁。
Using representative collectors such as sodium oleate,oxidized paraffin soap（731）,benzyl hydroxamic acid and C7～9 hydroxamic acid,flotation tests on pure minerals of limonate,calcite,kaolinite and quartz were carried out.The results show that the sodium oleate is a good collector for limonite flotation,as,with a sodium oleate dosage of 3×10-4 mol/L,limonite shows the best floatability with the pulp pH of 6.5～10.5.Mechanism study shows that sodium oleate can be adsorbed significantly onto limonite within the test pH range,and the PZC of limonite shifts from pH=8.0 to pH=3.0.Electrostatic adsorption between oleate and limonite and hydrogen bonding between oleic molecular and limonite are the major mechanisms in a pH range of 2.0～4.0;while in pH range of 4.0～10.5,chemical reaction between oleate and iron play the dominant role,and the infrared spectroscopic analysis shows that the reaction product of sodium oleate and limonite should be ferrous oleate.
出处
《矿冶工程》
CAS
CSCD
北大核心
2011年第2期49-52,56,共5页
Mining and Metallurgical Engineering
关键词
褐铁矿
油酸钠
浮选
作用机理
limonite
sodium oleate
flotation
action mechanism
